View BD5451EFV1106_3258505.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

1/34 www.rohm.com 2011.06 - rev. a ? 2011 rohm co., ltd. all rights reserved. middle power class-d speaker amplifiers class-d speaker amplifier for digital input bd5451efv description bd5451efv is a class d speaker amplifier designed for fl at-panel tvs in particular for space-saving and low-power consumption, delivers an output powe r of 15w+15w. this ic employs state-of-the-art bipolar, cmos, and dmos (bcd) process technology that eliminates turn-on resistance in t he output power stage and internal loss due to line resistances up to an ultimate level. with this technology, the ic can achieve high efficiency of 90% (15w+15w output with 8 ? load). in addition, the ic is packaged in a compact reverse heat radi ation type power package to achieve low power consumption and low heat generation and eliminates ne cessity of external heat-sink up to a total output power of 30w. this product satisfies both needs for drastic downsizing, low-profile structures and many function, high quality playback of sound system. features 1) this ic has one system of digital audio interface . (i 2 s format, sdata: 16 / 20 / 24bit, lrclk: 32khz / 44.1k hz / 48khz, bclk: 64fs(fixed), mclk: 256fs(fixed)) 2) low supply current at reset mode. 3) the decrease in sound quality bec ause of the change of the power supply voltage is prevented with the feedback circuitry of the output. in addition, a low noise and low distortion are achieved. eliminate large electrolytic-capacitors fo r high performance of power supply rejection. 4) s/n of the system can be optimized by adju sting the gain setting among 2 steps. (20db / 26db) 5) available for monaural mode. 6) within the wide range of the power supply voltage, it is possible to operate in a single power supply. (10 18v) 7) it contributes to miniaturizing, making to the thin type, and the power saving of the system by high efficiency and low heat. 8) eliminates pop noise generated when the power supply goe s on/off, or when the power supply is suddenly shut off. high quality muting performance is realized by using the soft-muting technology. 9) this ic is a highly reliable design to which it has various protection functions. (high temperature protection, under voltage protection, output short pr otection, output dc voltage protection and clock stop protection, (mclk, bclk, lrclk)) 10) small package (htssop-b28 package) contributes to reduction of pcb area. applications flat panel tvs (lcd, plasma), home audio, desktop pc, amusement equipments, electronic music equipments, etc. no.11075eat17
technical note 2/34 bd5451efv www.rohm.com 2011.06 - rev. a ? 2011 rohm co., ltd. all rights reserved. Q Q
technical note 3/34 bd5451efv www.rohm.com 2011.06 - rev. a ? 2011 rohm co., ltd. all rights reserved. ?
technical note 4/34 bd5451efv www.rohm.com 2011.06 - rev. a ? 2011 rohm co., ltd. all rights reserved. electrical characteristic curves (vcc=12v, ta=25 , r l =8 ? , gain=26db, fin=1khz, fs=48khz) measured by rohm designed 4 layer board. fig.1 current consumption - power supply voltage fig.2 current consumption - power supply voltage fig.3 efficiency - output power fig.4 current consumption - output power fig.5 wave form when releasing soft-mute fig.6 wave form when activating soft-mute 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0.18 0.20 8 101214161820 vcc [v] icc [ma] rstx=mutex=l r l =8 no signal 0 10 20 30 40 50 60 70 80 8 101214161820 vcc [v] icc [ma] rstx=h r l =8 no signal mutex=h mutex=l 0 10 20 30 40 50 60 70 80 90 100 0 2 4 6 8 101214161820 output power [w/ch] efficiency [%] r l =8 r l = 6 vcc=12v gain=20db fin=1khz 0 0.5 1 1.5 2 2.5 3 3.5 02468101214161820 output power [w/ch] icc [a] vcc=12v gain=20db fin=1khz r l =8 r l = 6 r l =4 vcc=12v rl=8 po=1w fin=500hz mutex(2pin) 5v/div 2v/div speaker output 5ms/div 2v/div 5v/div vcc=12v rl=8 po=1w fin=500hz speaker output mutex(2pin) 5ms/div
technical note 5/34 bd5451efv www.rohm.com 2011.06 - rev. a ? 2011 rohm co., ltd. all rights reserved. electrical characteristics (vcc=12v, gain=26db, fin=1khz, fs=48khz) measured by rohm designed 4 layer board. fig.7 output power ? power supply voltage fig.8 current consumption - output power fig.9 output power ? power supply voltage fig.10 current consumption - output power fig.11 output power ? power supply voltage fig.12 current consumption - output power dotted line means internal dissipation is over package power. 0 5 10 15 20 25 30 35 40 8 101214161820 vcc [v] output power [w/ch] r l =4 thd+n=10% thd+n=1% 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 0 102030405060 total output power [w] icc [a] vcc=12v vcc=15v vcc=18v 0 5 10 15 20 25 8 101214161820 vcc [v] output power [w/ch] r l =8 thd+n=10% thd+n=1 % 0 0.5 1 1.5 2 2.5 3 0 102030405060 total output power [w] icc [a] vcc=12v vcc=15v vcc=18v r l =8 0 5 10 15 20 25 30 8 101214161820 vcc [v] output power [w/ch] r l =6 thd+n=10% thd+n=1% 0 0.5 1 1.5 2 2.5 3 3.5 4 0 102030405060 total output power [w] icc [a] r l =6 vcc=12v vcc=15v vcc=18v
technical note 6/34 bd5451efv www.rohm.com 2011.06 - rev. a ? 2011 rohm co., ltd. all rights reserved. electrical characteristic curves (vcc=12v, ta=25 , r l =8 ? , gain=20db, fin=1khz, fs=48khz) measured by rohm designed 4layer board. fig.13 fft of output noise voltage fig.14 voltage gain - frequency fig.15 thd+n ? output power fig.16 thd+n ? frequency fig.17 crosstalk ? output power fig.18 crosstalk ? frequency -140 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 10 100 1k 10k 100k frequency [hz] noise fft [dbv] no signal 10 12 14 16 18 20 22 24 26 28 30 10 100 1k 10k 100k frequency [hz] voltage gain [db] po=1w 0.01 0.1 1 10 100 0.01 0.1 1 10 100 output power [w/ch] thd+n [%] bw=20~20khz 6khz 1khz 100hz 0.01 0.1 1 10 100 10 100 1k 10k 100k frequency [hz] thd+n [%] bw=20~20khz po=1w -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 0.01 0.1 1 10 100 output power [w/ch] cross-talk[db] bw=20~20khz -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 10 100 1k 10k 100k frequency [hz] cross-talk [db] bw=20~20khz po=1w
technical note 7/34 bd5451efv www.rohm.com 2011.06 - rev. a ? 2011 rohm co., ltd. all rights reserved. electrical characteristic curves (vcc=12v, ta=25 , r l =6 ? , gain=20db, fin=1khz, fs=48khz) measured by rohm designed 4layer board fig.19 fft of output noise voltage fig.20 voltage gain - frequency fig.21 thd+n ? output power fig.22 thd+n ? frequency fig.23 crosstalk ? output power fig.24 crosstalk ? frequency -140 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 10 100 1k 10k 100k frequency [hz] noise fft [dbv] no signal 10 12 14 16 18 20 22 24 26 28 30 10 100 1k 10k 100k frequency [hz] voltage gain [db] po=1w 0.01 0.1 1 10 100 0.01 0.1 1 10 100 output power [w/ch] thd+n [%] bw=20~20khz 6khz 1khz 100hz 0.01 0.1 1 10 100 10 100 1k 10k 100k frequency [hz] thd+n [%] bw=20~20khz po=1w -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 0.01 0.1 1 10 100 output power [w/ch] cross-talk [db] bw=20~20khz -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 10 100 1k 10k 100k frequency [hz] cross-talk [db] bw=20~20khz po=1w
technical note 8/34 bd5451efv www.rohm.com 2011.06 - rev. a ? 2011 rohm co., ltd. all rights reserved. electrical characteristic curves( vcc=12v, ta=25 , r l =4 ? , gain=20db, fin=1khz, fs=48khz) measured by rohm designed 4layer board fig.25 fft of output noise voltage fig.26 voltage gain - frequency fig.27 thd+n ? output power fig.28 thd+n ? frequency fig.29 crosstalk ? output power fig.30 crosstalk ? frequency -140 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 10 100 1k 10k 100k frequency [hz] noise fft [dbv] no signal 10 12 14 16 18 20 22 24 26 28 30 10 100 1k 10k 100k frequency [hz] voltage gain [db] po=1w 0.01 0.1 1 10 100 0.01 0.1 1 10 100 output power [w/ ch] thd+n [%] bw=20~20khz 6khz 100hz 1khz 0.01 0.1 1 10 100 10 100 1k 10k 100k frequency [hz] thd+n [%] bw=20~20khz po=1w -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 0.01 0.1 1 10 100 output power [w/ch] cross-talk [db] bw=20~20khz -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 10 100 1k 10k 100k frequency [hz] cross-talk [db] bw=20~20khz po=1w
technical note 9/34 bd5451efv www.rohm.com 2011.06 - rev. a ? 2011 rohm co., ltd. all rights reserved. pin configuration and block diagram 22 21 20 19 18 17 16 15 1 2 3 4 5 6 7 8 9 14 10 11 12 13 25 24 23 28 27 26 filp reg3 gnda vcca control i/f i 2 s i/f under voltage protection over voltage protection clock stop protection high temperature protection driver fet 1p driver fet 1n driver fet 2p driver fet 2n pwm modulator gndp1 vccp1 8 over sampling digital filter gndp2 vccp2 reg_g gain selector output short protection output dc voltage protection gnda feedback feedback feedback feedback fila rstx mutex sdata lrclk bclk mclk filp reg3 gnda vcca reg_g fila gain error vccp1 vccp1 out1p out1p out1n out1n out2n out2n out2p out2p vccp2 vccp2 gndp2 gndp1
technical note 10/34 bd5451efv www.rohm.com 2011.06 - rev. a ? 2011 rohm co., ltd. all rights reserved. pin function explanation (provided pin voltages are typ. values) pin no. pin name pin voltage pin explanation internal equivalence circuit 1 rstx 0v reset pin for digital circuit h: reset off l: reset on 14 1 7 17.3k 32.7k 2 mutex 0v speaker output mute control pin h: mute off l: mute on 3 4 5 6 sdata lrclk bclk mclk digital audio signal input pin 12 gain gain setting terminal l: 20db h: 26db 7 gnda 0v gnd pin for analog signal 8 filp 1.75v~2.55v bias pin for pwm signal please connect the capacitor. 9 reg3 3.3v internal power supply pin for digital circuit please connect the capacitor. 10 error 3.3v error flag pin please connect pull-up resister. h: while normal l: while error 11 reg_g 5.2v internal power supply pin for gate driver please connect the capacitor. 14 7 50 k 2 , 3, 4 5, 6 , 13 14 8 7 14 9 7 500 k 14 10 7 500 14 11 7 500 k
technical note 11/34 bd5451efv www.rohm.com 2011.06 - rev. a ? 2011 rohm co., ltd. all rights reserved. pin no. pin name pin voltage pin explanation internal equivalence circuit 12 fila 2.5v bias pin for pwm signal. please connect the capacitor. 14 vcca vcc power supply pin for analog signal 15,16 vccp2 vcc power supply pin for ch2 pwm signal please connect the capacitor. 17,18 out2p vcc0v output pin of ch2 positive pwm please connect to output lpf. 19 gndp2 0v gnd pin for ch2 pwm signal 20,21 out2n vcc 0v output pin of ch2 negative pwm please connect to output lpf. 22,23 out1n vcc 0v output pin of ch1 negative pwm please connect to output lpf. 24 gndp1 0v gnd pin for ch1 pwm signal 25,26 out1p vcc 0v output pin of ch1 posotive pwm please connect to output lpf. 27,28 vccp1 power supply pin for ch1 pwm signal please connect the capacitor. 14 12 7 50k 50k 17,18 20,21 19 15 16 , 27, 28 25, 26 22, 23 24
technical note 12/34 bd5451efv www.rohm.com 2011.06 - rev. a ? 2011 rohm co., ltd. all rights reserved. terminal setting (1) gain pin function gain (13pin) speaker output gain l 20db h 26db (2) rstx pin, mutex pin function rstx (1pin) mutex (2pin) normalcy error detecting pwm output (out1p, 1n, 2p, 2n) error output pwm output (out1p, 1n, 2p, 2n) error output l l or h hiz_l (reset mode) h hiz_l (reset mode) h h l hiz_l (mute on) h hiz_l (mute on) l h h normal operation (mute off) h hiz_l (mute on) l rstx(1pin)terminal, mutex(2pin)terminal are internally pulled down by 50 k (typ.) with rstx=l data of every register within ic (i 2 s / i/f part, 8 over sampling digital filter part, latch circ uit when detecting error) becomes unnecessary. input digital audio signal sampling frequency (fs) explanation pwm sampling frequency, soft-start, soft-mute time, and the det ection time of the dc voltage protection in the speaker depends on sampling frequency (fs) of the digital audio input. sampling frequency of the digital audio input (fs) pwm sampling frequency (fpwm) soft-start / soft-mute time dc voltage protection in the speaker detection time 32khz 256khz 32msec. 64msec. 44.1khz 352.8khz 23msec. 46msec. 48khz 384khz 21.5msec. 43msec. for voltage gain (gain setting) bd5451efv prescribe voltage gain at speak er output (btl output) under the definition 0dbv (1vrms) as full scale input of the digital audio input signal. for example, digital audio i nput signal = -20dbfs (0.1vrms), gain setting = 20db, load resistance r l = 8 will give speaker output (btl output) amp litude as vo=1vrms. (output power po = vo 2 /r = 0.125w )
technical note 13/34 bd5451efv www.rohm.com 2011.06 - rev. a ? 2011 rohm co., ltd. all rights reserved. format of digital audio input ? mclk: it is system clock input signal. it will input lrclk, bclk, sdata that synchronizes with th is clock that are 256 times of sampling frequency (256fs). ? lrclk: it is l/r clock input signal. it corresponds to 32khz / 44.1khz / 48khz with those clo ck (fs) that are same to the sampling frequency (fs) . the data of a left channel and a right channel for one sample is input to this section. ? bclk: it is bit clock input signal. it is used for the latch of data in every one bit by sampling frequency?s 64 times sampling frequency (64fs). ? sdata: it is data input signal. it is amplitude data. the data length is different accord ing to the resolution of the input digital audio data. it corresponds to 16/ 20/ 24 bit. i 2 s data format fig.31 i 2 s data format 64fs, 24 bit data fig.32 i 2 s data format 64fs, 20 bit data fig.33 i 2 s data format 64fs, 16 bit data the low section of lrclk becomes lch, th e high section of lrclk becomes rch. after changing lrclk, second bit becomes msb. lrclk bclk sdata lch rch 32 clocks 32 clocks msb 22 21 20 19 18 17 16 15 14 msb 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 13 12 11 10 9 8 7 6 76 3 54 1 2 lsb 3 54 1 2 lsb 1/64fs msb 18 17 9 8 7 6 5 msb 18 17 16 15 14 13 12 11 10 4 3 2 1 lsb 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 lsb lrclk bclk sdata lch rch msb msb lrclk bclk sdata lch rch 98765 14 13 12 11 10 4 3 2 1 lsb lsb 14 13 12 11 10 9 8 7 6 5 4 3 2 1
technical note 14/34 bd5451efv www.rohm.com 2011.06 - rev. a ? 2011 rohm co., ltd. all rights reserved. mclk 1/f lrclk 1 / f lrclk bclk 1/f bclk lrclk bclk sdata thd;lr tsu;lr thd ; sd /mclk ; tsu ; sd ; mclk bclk thd ; bc ; tsu ; bc ; audio interface format and timing recommended timing and operating conditions (mclk, bclk, lrclk, sdata) fig.34 clock timing fig.35 audio interface timing (1) fig.36 audio interface timing (2) parameter symbol limit unit min. max. 1 mclk frequency fmclk 8.192 12.288 mhz 2 lrclk frequency flrclk 32 48 khz 3 bclk frequency fbclk 2.048 3.072 mhz 4 setup time, lrclk 1 tsu;lr 20 ns 5 hold time, lrclk 1 thd;lr 20 ns 6 setup time, sdata tsu;sd 20 ns 7 hold time, sdata thd;sd 20 ns 8 setup time, bclk 2 tsu;bc 3 ns 9 hold time, bclk 2 thd;bc 7 ns 1 this regulation is to keep rising edge of l rck and rising edge of bclk from overlapping. 2 this regulation is to keep rising edge of mc lk and rising edge of bclk from overlapping.
technical note 15/34 bd5451efv www.rohm.com 2011.06 - rev. a ? 2011 rohm co., ltd. all rights reserved. power supply start-up sequence vccp1 (15, 16pin) vccp2 (27, 28pin) vcca (14pin) fila (11pin) reg_g (12pin) bclk (5pin) lrclk (4pin) sdata (3pin) reg_g reg_3 t t t t t mutex (2pin) rstx (1pin) t mclk (6pin) filp about20msec reg3 (9pin) soft-start 21.5msec(fs=48khz) speaker output power up vcca, vccp1, vccp2 simultaneously. degital audio data communication. set rstx to high after power up. fila filp (8pin) with vcc10v, waiting time unnecessary. with vcc10v, there are no problem sending digital audio data at rstx=l.. after rstx=lh wait more than 20msec to mutex=lh.
technical note 16/34 bd5451efv www.rohm.com 2011.06 - rev. a ? 2011 rohm co., ltd. all rights reserved. power supply shut-down sequence speaker output set mutex to low. after stopping speaker output, turn off the transmission of digital audio signal. set rstx to low power down vcca, vccp1, vccp2, simultaneously. soft-mute 21.5msec(fs=48khz) vccp1 (15, 16pin) vccp2 (27, 28pin) vcca (14pin) rstx (1pin) mutex (2pin) bclk (5pin) lrclk (4pin) sdata (3pin) reg_g reg_3 t t t t t t mclk (6pin) filp fila filp (12pin) reg_g (11pin) reg3 (9pin) fila (8pin) about 50msec with vcc10v, there are no problem sending digital audio data even by rstx=l.
technical note 17/34 bd5451efv www.rohm.com 2011.06 - rev. a ? 2011 rohm co., ltd. all rights reserved. about the protection function protection function detecting & releasing condition pwm output error output output short protection detecting condition detecting current = 10a (typ.) hiz_low (latch) l (latch) dc voltage protection in the speaker detecting condition pwm output duty=0% or 100% 43msec(fs=48khz) above fixed hiz_low (latch) l (latch) high temperature protection detecting condition chip temperature to be above 150 (typ.) hiz_low h releasing condition chip temperature to be below 120 (typ.) normal operation under voltage protection detecting condition power supply voltage to be below 8v (typ.) hiz_low h releasing condition power supply voltage to be above 9v (typ.) normal operation over voltage protection detecting condition power supply voltage to be above 21.5v(typ.) hiz_low h releasing condition power supply voltage to be below 20.5v(typ.) normal operation clock stop protection detecting condition no change to mclk more than 1sec (typ.) or no change to bclk more than 1sec (typ.) or no change to lrclk more than 21sec (at fs=48khz.). hiz_low h releasing condition normal input to mclk, bclk and lrclk. normal operation * the error pin is nch open-drain output. * once an ic is latched, the circuit is not released automatically even after an abnormal status is removed. the following procedures or is available for recovery. after turning mutex terminal to low(holding time to low = 10msec(min.)) turn back to high again. restore power supply after dropping to power supply voltage vcc 3v(10msec (min.) holding) which internal power on reset circuit activates.
technical note 18/34 bd5451efv www.rohm.com 2011.06 - rev. a ? 2011 rohm co., ltd. all rights reserved. 1) output short protection( short to the power supply) this ic has the pwm output short protecti on circuit that stops the pwm output when the pwm output is short-circuited to the power supply due to abnormality. detecting condition - it will detect when mutex pin is set high and the current that fl ows in the pwm output pin becomes 10a(typ.) or more. the pwm output inst antaneously enters the state of hiz-low if detected, and ic does the latch. releasing method - after turning mutex terminal to low(holding time to low = 10msec(min .)) turn back to high again. restore power supply after dropping to power supply voltage vcc 3v(10msec (min.) holding) which internal power on reset circuit activates. error (10pin ) t t out1p (25,26 pin) out1n (22,23 pin) out2n (20,21 pin) out2p (17,18 pin) 10 a (typ .) t mutex(2pin) 1sec(typ.) t short to vcc release from short to vcc pwm out ic latches with hiz-low. released from latch state . over current latch release 10msec(min.)
technical note 19/34 bd5451efv www.rohm.com 2011.06 - rev. a ? 2011 rohm co., ltd. all rights reserved. 2) output short protection(short to gnd) this ic has the pwm output short protecti on circuit that stops the pwm output when the pwm output is short-circuited to gnd due to abnormality. detecting condition - it will detect when mutex pin is set hig h and the current that flows in the pwm output terminal becomes 10a(typ.) or more. the pwm output in stantaneously enters the state of hiz-low if detected, and ic does the latch. releasing method ? after turning mutex terminal to low(holding time to low = 10msec(min .)) turn back to high again. restore power supply after dropping to power supply voltage vcc 3v(10msec (min.) holding) which internal power on reset circuit activates. short to gnd release from short to gnd pwm out ic latches with hiz-low. released from latch state. over current latch release error (10pin) mutex(2pin) sec(typ.) t t t 10a(typ.) t out1p (25,26pin) out1n (22,23pin) out2n (20,21pin) out2p (17,18pin) 0msec(min.)
technical note 20/34 bd5451efv www.rohm.com 2011.06 - rev. a ? 2011 rohm co., ltd. all rights reserved. 3) dc voltage protection in the speaker when the dc voltage in the speaker is impressed due to abnorma lity, this ic has the protection circuit where the speaker is defended from destruction. detecting condition - it will detect when mutex pin is set high or low and pwm output duty=0% or 100% , 43msec(fs=48khz) or above. once detected, the pwm output instantaneously enters the state of hiz-low, and ic does the latch. releasing method ? after turning mutex terminal to low(holding time to low = 10msec(min .)) turn back to high again. restore power supply after dropping to power supply voltage vcc 3v(10msec (min.) holding) which internal power on reset circuit activates. out1p (25, 26pin) error (10pin) out1n (22, 23pin) out2n (20, 21pin) out2p (17, 18pin) t t t t mutex(2pin) speaker output latch release state. soft-start latch release pwm out locked duty=100% abnormal state. abnormal state release. pwm output ic latche with hiz-low. 21.5msec(fs=48khz) 0msec(min.)
technical note 21/34 bd5451efv www.rohm.com 2011.06 - rev. a ? 2011 rohm co., ltd. all rights reserved. 4) high temperature protection this ic has the high temperature protec tion circuit that prevents thermal reckle ss driving under an abnormal state for the temperature of the chip to exceed tjmax=150 . detecting condition - it will detect when mutex pin is set high and the temperature of the chip becomes 150 (typ.) or more. speaker output turn mute immediately, when high temperature protection is detected. releasing condition - it will release when mutex pin is set high and the temperature of the chip becomes 120 (typ.) or less. the speaker output is out putted through a soft-start when released. temperature of ic chip junction() speaker output hiz-low soft-start 21.5msec(fs=48khz) out1p (25,26pin) 150 120 3.3v error (10pin) out1n (22,23pin) out2n (20,21pin) out2p (17,18pin) t t t t
technical note 22/34 bd5451efv www.rohm.com 2011.06 - rev. a ? 2011 rohm co., ltd. all rights reserved. 5) under voltage protection this ic has the under voltage protection circuit that make speaker output mute once detecting extreme drop of the power supply voltage. detecting condition ? it will detect when mutex pin is set high and the power supply voltage becomes lower than 8v.speaker output turn mute immediately, when under voltage protection is detected. releasing condition ? it will release when mutex pin is set high and the power supply voltage becomes more than 9v. the speaker output is outputted th rough a soft-start when released. speaker output hiz-low vcca (14pin) error (10pin) 9v 8v 3.3v vccp1 (15, 16pin) vccp2 (27, 28pin) t t t t out1p (25,26pin) out1n (22,23pin) out2n (20,21pin) out2p (17,18pin) soft-start 21.5msec(fs=48khz)
technical note 23/34 bd5451efv www.rohm.com 2011.06 - rev. a ? 2011 rohm co., ltd. all rights reserved. 6) over voltage protection this ic has the under voltage protection circuit that make speaker output mute once detecting extreme drop of the power supply voltage. detecting condition ? it will detect when mutex pin is set high and the power supply voltage becomes more than 21.5v.speaker output turn mute immediately, when over voltage protection is detected. releasing condition ? it will release when mutex pin is set high and the power supply voltage becomes lower than 20.5v. the speaker output is outputted through a soft-start when released. vcca (14pin) error (10pin) 19v 21v 3.3v vccp1 (15, 16pin) vccp2 (27, 28pin) t t t t out1p (25,26pin) out1n (22,23pin) out2n (20,21pin) out2p (17,18pin) speaker output hiz-low soft-start 21.5msec(fs=48khz)
technical note 24/34 bd5451efv www.rohm.com 2011.06 - rev. a ? 2011 rohm co., ltd. all rights reserved. 7-1) clock stop protection(mclk) this ic has the clock stop protection circui t that make the speaker output mute when the mclk signal of the digital audio input stops. detecting condition - it will detect when mutex pin is set high and the mclk signal stops for about 1sec or more. 21.5v. speaker output turn mute immediatel y, clock stop protection is detected. releasing condition - it will release when mutex pin is set high and the mclk signal returns to the normal clock operation. the speaker output is outputted through a soft-start when released. out1p (25,26pin) out1n (22,23pin) out2n (20,21pin) out2p (17,18pin) mclk (6pin) error (10pin) 3.3v t t t t speaker output clock stop clock recove r hiz - low protection start with about 1 clock stop. soft - start 21.5msec (fs= 48 khz )
technical note 25/34 bd5451efv www.rohm.com 2011.06 - rev. a ? 2011 rohm co., ltd. all rights reserved. 7-2) clock stop protection(bclk) this ic has the clock stop protection circuit that make the speak er output mute when the bclk signal of the digital audio input stops. detecting condition - it will detect when mutex pin is set high and the bclk signal stops for about 1sec or more. 21.5v.speaker output turn mute immediately, when clock stop protection is detected. releasing condition - it will release when mutex pin is set high and the bclk signal returns to the normal clock operation. the speaker output is outputted through a soft-start when released. bclk (5pin) error(10pin) 3.3v t t t t out1p (25,26pin) out1n (22,23pin) out2n (20,21pin) out2p (17,18pin) clock stop clock recover hiz - low protection start with about 1 sec clock stop . soft - start 21.5msec ( fs= 48khz) speaker output
technical note 26/34 bd5451efv www.rohm.com 2011.06 - rev. a ? 2011 rohm co., ltd. all rights reserved. 7-3) clock stop protection (lrclk) this ic has the clock stop protection circuit that make t he speaker output mute when the lrclk signal of the digital audio input stops. detecting condition - it will detect when mutex pin is set high and the lrclk signal stops for about 21sec (at fs=48khz) or more. speaker output turn mute immediately, when clock stop protection is detected. releasing condition - it will release when mutex pin is set high and the lrclk signal returns to the normal clock operation. the speaker output is outputt ed through a soft-start when released. lrclk (4pin) error (10pin) protection start with about 21us (fs=48khz) clock stop. 3.3v t t t t out1p (25,26pin) out1n (22,23pin) out2n (20,21pin) out2p (17,18pin) clock stop clock recover hiz-low soft-start 21.5msec(fs=48khz) speaker output
technical note 27/34 bd5451efv www.rohm.com 2011.06 - rev. a ? 2011 rohm co., ltd. all rights reserved. application circuit example (stereo btl output, rl=8 , vcc=10v 16v, po= 15w) bom list (stereo btl output, r l =8 , vcc=10v 16v, po= 15w) parts parts no. value company product no. rated voltage tolerance size ic u1 rohm bd5451efv 9.7mm6.4mm inductor l17, l20, l23, l26 10 h toko b1047ds-100m=3p - (20%) 7.6mm7.6mm resistor r10 100k rohm mcr03ezpj104 1/10w j(1%) 1.6mm0.8mm capacitor c14, c15, c27 10f murata grm31cb11e106ka75l 25v b(10% ) 3.2mm1.6mm c8, c9, c11, c12 0.1f grm188b11a104ka92d 10v b(10% ) 1.6mm0.8mm c17, c20, c23, c26 0.1f grm188b11e104ka01d 25v b(10% ) 1.6mm0.8mm as return of current regenerated by ba ck emf of output coil happe ns, take steps such as putting capacitor between power supply and gnd as a electric pathway for the regenera ted current. be sure that there is no problem with each property such as emptied capacity at lower temperature regarding electrolytic capacitor to decide capacity value. if the connected power supply does not have sufficient curren t absorption capacity, regenerative current will cause the voltage on the power supply line to rise, which combined with the product and its peripheral circuitry may exceed the absolute maximum ratings. it is recommended to implement a physical safety measure such as the insertion of a voltage clamp diode between the power supply and gnd pins. 22 21 20 19 18 17 16 15 1 2 3 4 5 6 7 8 9 14 10 11 12 13 25 24 23 28 27 26 rstx mutex error digital audio source -con gnda c8 c9 0.1 f 0.1 f vccp1: 10v 16v filp reg3 gnda vcca control i/f i 2 s i/f under voltage protection over voltage protection clock stop protection high temperature protection driver fet 1p driver fet 1n driver fet 2p driver fet 2n pwm modulator gndp1 vccp1 8 over sampling digital filter vcca: 10v 16v sp 1ch c26 l26 c23 l23 10 h 10 h 0.1 f 0.1 f (8 ) c27 10 f gndp1 gndp1 vccp2: 10v 16v sp 2ch c17 l17 c20 l20 10 h 10 h 0.1 f 0.1 f (8 ) c15 10 f gndp2 gndp2 gndp2 vccp2 reg_g 0.1 f gain selector 100k r10 output short protection output dc voltage protection gnda feedback feedback feedback feedback c11 fila 0.1 f c12 c14 10 f sdata lrclk bclk mclk 0 0 0 0 (nop)
technical note 28/34 bd5451efv www.rohm.com 2011.06 - rev. a ? 2011 rohm co., ltd. all rights reserved. 22 21 20 19 18 17 16 15 1 2 3 4 5 6 7 8 9 14 10 11 12 13 25 24 23 28 27 26 rstx mutex error -con gnda c8 c9 0.1 f 0.1 f vccp1: 10v 16v filp reg3 gnda vcca control i/f i 2 s i/f under voltage protection over voltage protection clock stop protection high temperature protection driver fet 1p driver fet 1n driver fet 2p driver fet 2n pwm modulator gndp1 vccp1 8 over sampling digital filter vcca: 10v 16v sp 1ch c26 l26 c23 l23 10 h 10 h 0.1 f 0.1 f (8 ) c27 10 f gndp1 gndp1 gndp1 gndp2 vccp2 reg_g 0.1 f gain selector 100k r10 output short protection output dc voltage protection gnda feedback feedback feedback feedback c11 fila 0.1 f c12 c14 10 f digital audio source sdata lrclk bclk mclk 0 0 0 0 (nop) application circuit example (monaural btl output, rl=8 , vcc=10v 16v, po= 15w) bom list (monaural btl output, rl=8 , vcc=10v 16v, po= 15w) parts parts no. value company product no. rated voltage tolerance size ic u1 rohm bd5451efv 9.7mm6.4mm inductor l23, l26 10 h toko b1047ds-100m=3p - (20%) 7.6mm7.6mm resistor r10 100k rohm mcr03ezpj104 1/10w f(1%) 1.6mm0.8mm capacitor c14, c27 10f murata grm31cb11e106ka75l 25v b(10% ) 3.2mm1.6mm c8, c9, c11, c12 0.1f grm188b11a104ka92d 10v b(10% ) 1.6mm0.8mm c23, c26 0.1f grm188b11e104ka01d 25v b(10% ) 1.6mm0.8mm as return of current regenerated by ba ck emf of output coil happe ns, take steps such as putting capacitor between power supply and gnd as a electric pathway for the regenera ted current. be sure that there is no problem with each property such as emptied capacity at lower temperature regarding electrolytic capacitor to decide capacity value. if the connected power supply does not have sufficient curren t absorption capacity, regenerative current will cause the voltage on the power supply line to rise, which combined with the product and its peripheral circuitry may exceed the absolute maximum ratings. it is recommended to implement a physical safety measure such as the insertion of a voltage clamp diode between the power supply and gnd pins.
technical note 29/34 bd5451efv www.rohm.com 2011.06 - rev. a ? 2011 rohm co., ltd. all rights reserved. application circuit example (stereo btl output, rl=8 , vcc=16v 18v, po= 20w) to prevent going over absolute maximum rating by the leap out of power supply and the linking of pwm output wave form, please provide countermeasur e shown below diagram (dot-line ) when using at vcc 16v. bom list (stereo btl output, rl=8 , vcc=16v 18v, po= 20w) parts parts no. value company product no. rated voltage tolerance size ic u1 rohm bd5451efv 9.7mm6.4mm inductor l17, l20, l23, l26 10 h toko b1047ds-100m=3p - (20%) 7.6mm7.6mm resistor r10 100k rohm mcr03ezpj104 1/10w j(5%) 1.6mm0.8mm r17, r20, r23, r26 6.8 rohm mcr03ezpfl6r80 1/10w f(1%) 1.6mm0.8mm capacitor c14, c15, c27 10f murata grm31cb11e106ka75l 25v b(10%) 3.2mm1.6mm c8, c9, c11, c12 0.1f grm188b11a104ka92d 10v b(10%) 1.6mm0.8mm c17, c20, c23, c26 0.1f grm188b11e104ka01d 25v b(10%) 1.6mm0.8mm c17,b c20b, c23b, c26b 680pf grm188b11e681ka01 25v b(10%) 1.6mm0.8mm electrolytic capacitor c14b 220 f panasonic eca1emh221 25v 20% 8mm11.5mm as return of current regenerated by back emf of output coil happens, take steps such as putting capacitor between power supply and gnd as a electric pathway for the regenera ted current. be sure that there is no problem with each property such as emptied capacity at lower temperature regarding electrolytic capacitor to decide capacity value. if the connected power supply does not have sufficient curre nt absorption capacity, regener ative current will cause the voltage on the power supply line to rise, which combined with the product and its peripheral circuitry may exceed the absolute maximum ratings. it is recommended to implement a physical safety measure such as the insertion of a voltage clamp diode between the power supply and gnd pins. 22 21 20 19 18 17 16 15 1 2 3 4 5 6 7 8 9 14 10 11 12 13 25 24 23 28 27 26 rstx mutex error digital audio source -con gnda c8 c9 0.1 f 0.1 f filp reg3 gnda vcca control i/f i 2 s i/f under voltage protection over voltage protection clock stop protection high temperature protection driver fet 1p driver fet 1n driver fet 2p driver fet 2n pwm modulator gndp1 vccp1 8 over sampling digital filter vcc: 16v 18v sp 1ch c26 l26 c23 l23 10 h 10 h 0.1 f 0.1 f (8 ) c27 10 f gndp1 gndp1 sp 2ch c17 l17 c20 l20 10 h 10 h 0.1 f 0.1 f (8 ) c15 10 f gndp2 gndp2 gndp2 vccp2 reg_g gain selector 100k r10 output short protection output dc voltage protection gnda feedback feedback feedback feedback fila c11 0.1 f c26b 680pf c23b 680pf r23 6.8 r26 6.8 gndp1 c20b 680pf c17b 680pf r17 6.8 r20 6.8 gndp2 c14b 220 f c12 0.1 f gnd c14 10 f sdata lrclk bclk mclk 0 0 0 0 (nop)
technical note 30/34 bd5451efv www.rohm.com 2011.06 - rev. a ? 2011 rohm co., ltd. all rights reserved. 22 21 20 19 18 17 16 15 1 2 3 4 5 6 7 8 9 14 10 11 12 13 25 24 23 28 27 26 rstx mutex error digital audio source -con gnda c8 c9 0.1 f 0.1 f filp reg3 gnda vcca control i/f i 2 s i/f under voltage protection over voltage protection clock stop protection high temperature protection driver fet 1p driver fet 1n driver fet 2p driver fet 2n pwm modulator gndp1 vccp1 8 over sampling digital filter vcc: 16v 18v sp 1ch c26 l26 c23 l23 10 h 10 h 0.1 f 0.1 f (8 ) c27 10 f gndp1 gndp1 gndp1 gndp2 vccp2 reg_g gain selector 100k r10 output short protection output dc voltage protection gnda feedback feedback feedback feedback fila c11 0.1 f c26b 680pf c23b 680pf r23 6.8 r26 6.8 gndp1 c14b 220 f c12 0.1 f gnd c14 10 f sdata lrclk bclk mclk 0 0 0 0 (nop) application circuit example (monaural btl output, rl=8 , vcc=16v 18v, po= 20w) to prevent going over absolute maximum rating by the leap out of power supply and the linking of pwm output wave form, please provide countermeasur e shown below diagram (dot-line ) when using at vcc 16v. bom list (monaural btl output, r l =8 , vcc=16v 18v, po= 20w) parts parts no. value company product no. rated voltage tolerance size ic u1 rohm bd5451efv 9.7mm6.4mm inductor l23, l26 10 h toko b1047ds-100m=p3 - (20%) 7.6mm7.6mm resistor r10 100k rohm mcr03ezpj104 1/10w j(5%) 1.6mm0.8mm r23, r26 6.8 ? mcr03ezpfl6r80 1/10w f(1%) 1.6mm0.8mm capacitor c14, c27 10f murata grm31cb31e106ka75l 25v b(10% ) 3.2mm1.6mm c8, c9, c11, c12 0.1f grm188b11a104ka92d 10v b(10% ) 1.6mm0.8mm c23, c26 0.1f grm188b11e104ka01d 25v b(10% ) 1.6mm0.8mm c23b, c26b 680pf grm188b11e681ka01 25v b(10% ) 1.6mm0.8mm electrolytic capacitor c14b 220 f panasonic eca1emh221 25v 20% 8mm11.5mm as return of current regenerated by ba ck emf of output coil happe ns, take steps such as putting capacitor between power supply and gnd as a electric pathway for the regenera ted current. be sure that there is no problem with each property such as emptied capacity at lower temperature re garding electrolytic capacitor to decide capacity value. if the connected power supply does not have sufficient curr ent absorption capacity, regenerative current will cause the voltage on the power supply line to rise, which combin ed with the product and its peripheral circuitry may exceed the absolute maximum ratings. it is recommended to implement a physical safety measure such as the insertion of a voltage clamp diode between the power supply and gnd pins.
technical note 31/34 bd5451efv www.rohm.com 2011.06 - rev. a ? 2011 rohm co., ltd. all rights reserved. output lc filter circuit an output filter is required to elimin ate radio-frequency components exceeding the audio-frequency region supplied to a load (speaker). because this ic uses sampling clock frequ encies from 256khz (fs=32khz) to 384khz (fs=48khz) in the output pwm signals, the high-frequency com ponents must be appropriately removed. this section takes an example of an lc type lpf shown below, in which coil l and capacitor c compose a differential filter with an attenuation property of -12db / oct. a large part of sw itching currents flow to capacit or c, and only a small part of the currents flow to speaker r l . this filter reduces unwanted emission this way. in addition, coil l and capacitor cg compose a filter against in-phase compon ents, reducing unwanted emission further. following presents output lc filter cons tants with typical load impedances. r l l c 4 10h 0.47f 6 10h 0.15f 8 10h 0.1f use coils with a low direct-current resistance and with a su fficient margin of allowable currents. a high direct-current resistance causes power losses. in addition, select a closed magnetic circuit type product in normal cases to prevent unwanted emission. use capacitors with a low equivalent series resistance, and good impedance characteristics at high frequency ranges (100khz or higher). also, select an item with suffici ent withstand voltage because fl owing massive amount of high-frequency currents is expected. r l c l c l 22,23 or 20,21 25,26 or 17,18
technical note 32/34 bd5451efv www.rohm.com 2011.06 - rev. a ? 2011 rohm co., ltd. all rights reserved. notes for use 1 ) absolute maximum ratings use of the ic in excess of absolute maximum ratings such as the applied voltage or operating temperature range may result in ic damage. assumptions should not be made regard ing the state of the ic (short mode or open mode) when such damage is suffered. a physical safety measure such as a fuse should be implemented when use of the ic in a special mode where the absolute maximum ratings may be exceeded is anticipated. 2 ) power supply lines as return of current regenerated by ba ck emf of output coil happens, take steps such as putting capacitor between power supply and gnd as a electric pathway for the regenerat ed current. be sure that there is no problem with each property such as emptied capacity at lower temperature regarding electrolytic capacitor to decide capacity value. if the connected power supply does not have su fficient current absorption capacity, regenerative current will cause the voltage on the power supply line to rise, which combined with the product and its peripheral circuitry may exceed the absolute maximum ratings. it is recommended to implement a physical safety measure such as the insertion of a voltage clamp diode between the power supply and gnd pins. 3 ) gnd potential(pin 7, 19, 24). any state must become the lowest voltag e about gnd terminal and vss terminal. 4 ) input terminal the parasitic elements are formed in the ic because of the voltage relation. the parasitic element operating causes the wrong operation and destruction. theref ore, please be careful so as not to operate the parasitic elements by impressing to input terminals lower voltage than gnd and vss. please do not apply the voltage to the input terminal when the power-supply voltage is not impressed. 5 ) setting of heat use a thermal design that allows for a sufficient margin in light of the power dissipati on (pd) in actual operating conditions. this ic exposes its frame of the backside of package. note that this part is assumed to use after providing heat dissipation treatment to improve heat dissipation efficien cy. try to occupy as wide as possible with heat dissipation pattern not only on the board surface but also the backside. class d speaker amplifier is high efficiency and low heat generation by comparison with conventional analog power amplifier. however, in case it is operated continuously by maximum output power, power dissipation (pdiss) may exceed package dissipation. please consider about heat design that power dissipation (pdiss) does not exceed package dissipation (pd) in average power (poav). (tjmax : maximum junction temperature=150 , ta : peripheral temperature[ ], ja : thermal resistance of package[ /w], poav: average power[w], : efficiency) package dissipation: pd (w) = (tjmax - ta)/ ja power dissipation : pdiss(w)= poav (1/ - 1) 6 ) actions in strong magnetic field use caution when using the ic in the pres ence of a strong magnetic field as doi ng so may cause the ic to malfunction. 7 ) thermal shutdown circuit this product is provided with a built-in thermal shutdown circuit. when the thermal shutdown circuit operates, the output transistors are placed under open stat us. the thermal shutdown circuit is primarily intended to shut down the ic avoiding thermal runaway under abnormal conditions with a chip temperature exceeding tjmax = 150 . 8 ) shorts between pins and misinstallation when mounting the ic on a board, pay adeq uate attention to orientation and placem ent discrepancies of the ic. if it is misinstalled and the power is turned on, the ic may be damage d. it also may be damaged if it is shorted by a foreign substance coming between pins of the ic or bet ween a pin and a power supply or a pin and a gnd. 9 ) power supply on/off (pin 14, 15, 16, 27, 28) in case power supply is started up, rstx (pin 1) and mutex (pin 2) always should be set low. and in case power supply is shut down, it should be set low likewise. then it is possible to eliminate pop noise when power supply is turned on/off. and also, all power supply terminals should start up and shut down together. 10 ) error terminal(pin 10) a error flag is outputted when output short protection and dc voltage protecti on in the speaker are operated. these flags are the function which the condition of this product is shown in. 11) precautions for spealer-setting if the impedance characteristics of the speakers at high-frequency range while incr ease rapidly, the ic might not have stable-operation in the resonance frequency range of the lc-filter. therefore, consider addi ng damping-circuit, etc., depending on the impedance of the speaker. 12) notes about the phase of mclk (pin6) and bclk (pin5) if the rising edge of mclk (pin6) and bclk (pin5) becom es simultaneous, noise or sound shutdown may occur. please cope with it, when the rising edge of mclk and bc lk becomes simultaneous. (example: insert rc filter in bclk)
technical note 33/34 bd5451efv www.rohm.com 2011.06 - rev. a ? 2011 rohm co., ltd. all rights reserved. package outline (htssop-b28) allowable power dissipation measuring instrument: th-156(shibukawa kuwano electrical instruments co., ltd.) measuring conditions: installation on rohm?s board board size: 70mm70mm1.6mm(with thermal via on board) material: fr4 ? the board on exposed heat sink on the back of package are connected by soldering. pcb : 2-layer board(back copper foil size: 70mm70mm) ja=37.9 /w pcb : 4-layer board(back copper foil size: 70mm70mm) ja=26.6 /w 0 1 2 3 4 5 6 0 1 0 20 30 40 50 60 70 80 90 100 110 120 130 140 150 ambient temperature :ta (c) power dissipation :pd (w) bd5451efv lot no. (unit: mm) pkg: htssop-b28 drawing no: ex199-5002-1 pcb 4.7w pcb 3.3w htssop-b28 package
technical note 34/34 bd5451efv www.rohm.com 2011.06 - rev. a ? 2011 rohm co., ltd. all rights reserved. ordering part number b d 5 4 5 1 e f v - e 2 part no. part no. package efv: htssop-b28 packaging and forming specification e2: embossed tape and reel (unit : mm) htssop-b28 0.08 m 0.08 s s 1.0 0.2 0.5 0.15 4 + 6 ? 4 0.17 +0.05 - 0.03 15 28 14 1 (2.9) 4.4 0.1 (5.5) (max 10.05 include burr) 0.625 6.4 0.2 9.7 0.1 1pin mark 1.0max 0.65 0.85 0.05 0.08 0.05 0.24 +0.05 - 0.04 ? order quantity needs to be multiple of the minimum quantity. embossed carrier tape (with dry pack) tape quantity direction of feed the direction is the 1pin of product is at the upper left when you hold reel on the left hand and you pull out the tape on the right hand 2500pcs e2 () direction of feed reel 1pin
r1120 a www.rohm.com ? 2011 rohm co., ltd. all rights reserved. notice rohm customer support system http://www.rohm.com/contact/ thank you for your accessing to rohm product informations. more detail product informations and catalogs are available, please contact us. notes no copying or reproduction of this document, in part or in whole, is permitted without the consent of rohm co.,ltd. the content specied herein is subject to change for improvement without notice. the content specied herein is for the purpose of introducing rohm's products (hereinafter "products"). if you wish to use any such product, please be sure to refer to the specications, which can be obtained from rohm upon request. examples of application circuits, circuit constants and any other information contained herein illustrate the standard usage and operations of the products. the peripheral conditions must be taken into account when designing circuits for mass production. great care was taken in ensuring the accuracy of the information specied in this document. however, should you incur any damage arising from any inaccuracy or misprint of such information, rohm shall bear no responsibility for such damage. the technical information specied herein is intended only to show the typical functions of and examples of application circuits for the produc ts. rohm does not grant you, explicitly or implicitly, any license to use or exercise intellectual property or other rights held by rohm and other parties. rohm shall bear no responsibility whatsoever for any dispute arising from the use of such technical information. the products specied in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, ofce-automation equipment, commu- nication devices, electronic appliances and amusement devices). the products specied in this document are not designed to be radiation tolerant. while rohm always makes efforts to enhance the quality and reliability of its products, a product may fail or malfunction for a variety of reasons. please be sure to implement in your equipment using the products safety measures to guard against the possibility of physical injury, re or any other damage caused in the event of the failure of any product, such as derating, redundancy, re control and fail-safe designs. rohm shall bear no responsibility whatsoever for your use of any product outside of the prescribed scope or not in accordance with the instruction manual. the products are not designed or manufactured to be used with any equipment, device or system which requires an extremely high level of reliability the failure or malfunction of which may result in a direct threat to human life or create a risk of human injury (such as a medical instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuel- controller or other safety device). rohm shall bear no responsibility in any way for use of any of the products for the above special purposes. if a product is intended to be used for any such special purpose, please contact a rohm sales representative before purchasing. if you intend to export or ship overseas any product or technology specied herein that may be controlled under the foreign exchange and the foreign trade law, you will be required to obtain a license or permit under the law.

▲Up To Search▲

Price & Availability of BD5451EFV1106

	To Download BD5451EFV1106 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .