View PAM8615RHR_8281464.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

pam8615 document number: dsxxxxx rev. 1 - 1 1 of 14 www.diodes.com october 2012 ? diodes incorporated pam8615 a product line o f diodes incorporated 16w/ 32w stereo class-d audio power amplifier description the pam8615 is a 16w 32w (per channel) efficient class-d audio power amplifier for driving stereo speakers in a single-ended configuration or mono bridge-tie d speaker. the pam8615 can drive single-ended speakers as low as 4 ? . due to the low power dissipation and high efficiency the device can be used without any external heat sink when playing music. stereo speaker volume is controlled with a dc voltage applied to the volume control terminal offering a range of gain from -40db to +36db. the pam8615 is available in a tssop-24 package. features ? 32w/ch into 8 ? btl load from 24v supply (thermal limited) ? 16w/ch into 4 ? se load from 24v supply (thermal limited) ? operates from 8v to 30v ? supports multiple output configurations: ? 2-ch single-ended (half bridge)(16wx2) ? 1 ch bridge-tied load (full bridge) (32wx1) ? high efficiency above 90% ? 64-setup dc volume control from -40db to +36db ? singel ended analog inputs ? thermal and short-circuit protection ? flexible frequency adjustable by external component ? clock output for synchronization with multiple class-d devices ? no pop noise for start-up and shut-down sequences ? space-saving surface-mount 24 pin tssop package ? pb-free package pin assignments applications ? televisions ? home sound systems
pam8615 document number: dsxxxxx rev. 1 - 1 2 of 14 www.diodes.com october 2012 ? diodes incorporated pam8615 a product line o f diodes incorporated typical applications circuit single-ended configuration btl configuration
pam8615 document number: dsxxxxx rev. 1 - 1 3 of 14 www.diodes.com october 2012 ? diodes incorporated pam8615 a product line o f diodes incorporated pin descriptions pin number pin name i/o/p function 1 out_a o h-bridge a output. 2 pvcc_a p power supply for h-bridge a not connected to pvcc_b or avcc. 3 shdn i shutdown signal for ic (low = shutdown, high = operat ional). ttl logic levels with compliance to avcc. 4 mute i alogic high on this pin disables the outputs. a low on this pin enables the outputs. ttl logic levels with compliance to avcc. 5 in_a i audio input for channel a. 6 dgnd p digital gnd 7 in_b i audio input for channel b. 8 vcm o reference for analog cells. 9 dcv i dc voltage setting the gain of the amplifier. 10 ms_sv i master/slave select for determining direction of sync terminal. high = master mode, sync terminal is an output; low = slave mode, sync terminal accept s a clock input. 11 pvcc_b p power supply for h-bridge b, not connected to pvcc_a or avcc 12, 13 out_b o h-bridge b output 14 pgnd_b p power ground for h-bridge b 15 bst_b i/o bootstrap i /o for h-bridge b high-side fet 16 vclamp p internally generated voltage supply for bootst rap. not to be used as a supply or connected to any component other than the decoupling capacitor. 17 stnc i/o clock i nput/output for synchroni zing multiple class-d devices. direction determined by ms_sv terminal. 18 agnd p analog gnd. 19 rosc i/o current s etting resis tor for ramp generator. 20 avdd p analog 5v regulated output. 21 avcc p high-voltage analog power supply. 22 bst_a i/o bootstrap i /o for h-bridge a high-side fet. 23 pgnd_a p power ground for h-bridge a.
pam8615 document number: dsxxxxx rev. 1 - 1 4 of 14 www.diodes.com october 2012 ? diodes incorporated pam8615 a product line o f diodes incorporated functional block diagram absolute maximum ratings (@t a = +25c, unless otherwise specified.) these are stress ratings only and functional operation is not implied. exposure to absolute maximum ratings for prolonged time periods may affect device reliability. all voltages are with respect to ground. parameter rating unit supply voltage avcc, pvcc -0.3 to +30 v logic input voltage: shdn, mute -0.3 to avcc +0.3 v dcv, ms_sv, sync 0 to +5.5 analog input voltage: in-a, in-b 0 to +5.5 v storage temperature -65 to +150 c soldering temperature 300, 5sec
pam8615 document number: dsxxxxx rev. 1 - 1 5 of 14 www.diodes.com october 2012 ? diodes incorporated pam8615 a product line o f diodes incorporated recommended operating conditions (@t a = +25c, unless otherwise specified.) parameter rating unit supply voltage (v cc ) 10 to 26 v dcv volume control pin 0 to 5 f osc oscillator frequency (r osc = 100k ? ) 250 to 350 khz t a ? operating free-air temperature -40 to +85 c ambient operating temperature -20 to +85 ambient temperature range -40 to +160 junction temperature range -40 to +85 thermal information parameter package symbol max unit thermal resistance (junction to ambient) tssop-24 ja 30 c/w electrical characteristics (@t a = +25c, v cc = 24v, gain = 20db, r l = 4 ? , unless otherwise specified.) parameter symbol test conditions min typ max units class-d output offset voltage (measured differently) |vos| v i = 0v, av = 36db 10 65 mv quiescent supply current i cc shdn = 2v, mute = 0v, input ac_gnd, no load 25 40 ma quiescent supply current in mute mode i cc(mute) mute = 2v, no load 25 40 ma quiescent supply current in shutdown mode i cc(sd) shdn = 0.5v, no load 5 20 a oscillator frequency f osc r osc = 100k ? 323 khz drain-source on-state resistance r ds(on) v cc = 24v,io = 1a, ta = 27c 220 m ? power supply rejection ratio psrr v cc = 23.5v to 24.5v -60 db output power at 1% thd+n p o (se) v cc = 24v, r l = 4 ? , f = 1khz 14 w v cc = 24v, r l = 8 ? , f = 1khz 8.2 output power at 10% thd+n v cc = 24v, r l = 4 ? , f = 1khz 17.3 v cc = 24v, r l = 8 ? , f = 1khz 9.8 output power at 1% thd+n p o (btl) v cc = 24v, r l = 8 ? , f = 1khz 27 w v cc = 12v, r l =8 ? , f = 1khz 7 output power at 10% thd+n v cc = 24v, r l = 8 ? , f = 1khz 35 v cc = 12v, r l = 8 ? , f = 1khz 9 total harmonic distortion + noise thd+n r l = 4 ? , f = 1khz, p o = 10w 0.25% r l = 8 ? , f = 1khz, p o = 5w 0.15% output integrated noise floor v n 20hz to 22khz, a-weighted filter, gain = 20db -67 dbv crosstalk c s p o = 1w, f = 1khz, gain = 20db -60 db signal-to-noise ratio snr max output at thd+n<1%, f = 1khz, gain = 20db 86 db thermal trip point 160 c thermal hystersis 40 c
pam8615 document number: dsxxxxx rev. 1 - 1 6 of 14 www.diodes.com october 2012 ? diodes incorporated pam8615 a product line o f diodes incorporated dc volume control step voltage of the volume total_gain step voltage of the volume total_gain (v) (db) (v) (db) 1 0.10 -60 33 2.34 17.4 2 0.17 -40 34 2.41 18.0 3 0.24 -30 35 2.48 18.6 4 0.31 -20 36 2.55 19.2 5 0.38 -10 37 2.62 19.8 6 0.45 -5 38 2.69 20.4 7 0.52 -2.5 39 2.76 21.0 8 0.59 0 40 2.83 21.6 9 0.66 2 41 2.90 22.2 10 0.73 3 42 2.97 22.8 11 0.80 4 43 3.04 23.4 12 0.87 4.8 44 3.11 24.0 13 0.94 5.4 45 3.18 24.6 14 1.01 6.0 46 3.25 25.2 15 1.08 6.6 47 3.32 25.8 16 1.15 7.2 48 3.39 26.4 17 1.22 7.8 49 3.46 27.0 18 1.29 8.4 50 3.53 27.6 19 1.36 9.0 51 3.60 28.2 20 1.43 9.6 52 3.67 28.8 21 1.50 10.2 53 3.74 29.4 22 1.57 10.8 54 3.81 30.0 23 1.64 11.4 55 3.88 30.6 24 1.71 12.0 56 3.95 31.2 25 1.78 12.6 57 4.02 31.8 26 1.85 13.2 58 4.09 32.4 27 1.92 13.8 59 4.16 33.0 28 1.99 14.4 60 4.23 33.6 29 2.06 15.0 61 4.30 34.2 30 2.13 15.6 62 4.37 34.8 31 2.20 16.2 63 4.44 35.4 32 2.27 16.8 64 4.51 36.0
pam8615 document number: dsxxxxx rev. 1 - 1 7 of 14 www.diodes.com october 2012 ? diodes incorporated pam8615 a product line o f diodes incorporated typical performance characteristics (@t a = +25c, v dd = 24v, r l = 8 ? , unless otherwise specified.)
pam8615 document number: dsxxxxx rev. 1 - 1 8 of 14 www.diodes.com october 2012 ? diodes incorporated pam8615 a product line o f diodes incorporated typical performance characteristics (cont.) (@t a = +25c, v dd = 24v, r l = 8 ? , unless otherwise specified.)
pam8615 document number: dsxxxxx rev. 1 - 1 9 of 14 www.diodes.com october 2012 ? diodes incorporated pam8615 a product line o f diodes incorporated test setup for performance testing notes: 1. the ap aux-0025 low pass filter is necessary for class-d amplifier measurement with ap analyzer. 2. two 22 h inductors are used in series with load resistor to emulate the small speaker for effic iency measurement. application information power and heat dissipation choose speakers that are able to stand large output power from the pam8615. otherwise, speaker may suffer damage. heat dissipation is very important when the device works in fu ll power operation. two factors affect the heat dissipation, the efficiency of the device that determines the dissipation power, and the thermal re sistance of the package that determines the heat dissipation ca pability. generally, class?d amplifiers are high efficiency and need no heat sink. for high power ones that has high dissipation power, t he heat sink may also not necessary if the pcb is carefully designed to achieve good heat dissipation by the pcb itself. dual-side pcb to achieve good heat dissipation, the pcb' s copper plate should be thicker than 35m and the copper plate on both sides of the pcb should be utilized for heat sink. the thermal pad on the bottom of the device should be soldered to the plate of the pcb, and via holes, usually 9 to 16 should b e drilled in the pcb area under the device and deposited copper on the vias should be thick enough so t hat the heat can be dissipated to the oth er side of the plate. there should be no insulation mask on the other side of th e copper plate. it is better to drill more vias on the pcb aro und the device if possible. volume control a dc volume control section is integrated in pam8615, controll ing via dcv and dgnd terminals. the voltage on dcv pin, determin es internal amplifier gain as listed in page 6. if a resistor divider is used to fix gain of the amplifier, the dcv terminal can be directly conn ected to the resistor divider connected across avdd and dgnd. for fixed gain, the resistor divider values are calculated to center the voltage given in page 6. mute operation the mute pin is an input for controlling the output state of t he pam8615. a logic high on this pin disables the outputs and low enables the outputs. this pin may be used as a quick disable or enable of the outputs without a volume fade.
pam8615 document number: dsxxxxx rev. 1 - 1 10 of 14 www.diodes.com october 2012 ? diodes incorporated pam8615 a product line o f diodes incorporated application information (cont.) shutdown operation the pam8615 employs a shutdown operation mode to reduce supply cu rrent to the absolute minimum level during periods of non-use to save power. the sd input terminal should be pull high during normal ope ration when the amplifier is in use. pulling sd low causes th e outputs to mute and the amplifier to enter a low-current state. sd should never be left unconnected to prevent the amplifier from unpredictable operation. for the best power-off pop performance, the amplifier should be se t in shutdown mode prior to removing the power supply voltage . internal bias generator capacitor selection the internal bias generator (vcm) provides the internal bias for the preamplifier stage. the external input capacitors and this internal reference allow the inputs to be biased within the optimal common-mode range of the input preamplifiers. the selection of the capacitor value on the vcm terminal is critical for achieving th e best device performance. during startup or recovery from shutdown state, the vcm capacitor determines the rate at which t he amplifier starts up. the startup time is not critical for th e best de-pop performance since any heard pop sound is the result of the class- d output switching-on other than that of the startup time. how ever, at least a 0.47 f capacitor is recommended for the vcm capacitor. another function of the vcm capacitor is to bypa ss high frequency noise on the internal bias generator. power supply decoupling, cs the pam8615 is a high-performance cmos audio amplifier that r equires adequate power supply decoupling to ensure the output tota l harmonic distortion (thd) as low as possible. powe r supply decoupling also prevents oscillati ons caused by long lead between the amplifi er and the speaker. the optimum decoupling is achieved by using two capacitors of different ty pes that target different types of noise on the power supply leads. for higher frequency transients, spikes , or digital hash on the line, a good lo w equivalent-seriesresistance (esr) ceram ic capacitor, typically 0.1 f, is recommended, placing as cl ose as possible to the device's pvcc lead. to f ilter lower-frequency noises, a large aluminum electrolytic capacitor of 470 f or greater is recommended, placing near the audio power amplifier. the 10 f capacitor also serves as a local storage capacitor for supplying current during lar ge signal transients on the amplifier outputs. selection of rosc the switching frequency is determined by the values of component s connected to rosc (pin 19) and calculated with the following equation: f 21 x r 68 . 0 f p osc osc = the recommended values is r osc = 100k ? for a switching frequency of 323khz. bst_a and bst_b capacitors the half h-bridge output stages use nmos transistors only. they therefore require bootstrap capacitors for the high side of eac h output to turn on correctly. an at least 220nf ceramic capacitor, rated for at least 25v, must be connected from each output to its correspond ing bootstrap input. specifically, one 220nf capacitor must be connected from out_a to bst_a, and another 220nf capacitor from out_b to bst_b . it is recommended to use 1f bst capacitor to r eplace 220nf for lower than 100hz applications. vclamp capacitors to ensure that the maximum gate-to-source voltage for the nmos output transistors not exceeded, two internal regulators are use d to clamp the gate voltage. a 1 f capacitors must be connected from vclamp to ground and must be rated for at least 25v. the voltages at the vclamp terminals vary with vcc and may not be used to power any other circuitry. internal regulated 5-v supply (avdd) the avdd terminal is the output of an internallygenerated 5v s upply, used for the oscillator, preamplifier, and volume control circuitry. it requires a 0.1 f to 1 f capacitor, placed very close to the pi n to ground to keep the regulator stable. the regulator may not be used to power any external circuitry.
pam8615 document number: dsxxxxx rev. 1 - 1 11 of 14 www.diodes.com october 2012 ? diodes incorporated pam8615 a product line o f diodes incorporated application information (cont.) using low-esr capacitors low - esr capacitors are recommended throughout this application se ction. a real (with respect to ideal) capacitor can be model ed simply as a resistor in series with an ideal capacitor. the voltage drop ac ross this resistor minimizes t he beneficial effects of the capac itor in the circuit. the lower the equivalent value of this resistance the more the real capacitor behaves as an ideal capacitor. short-circuit protection the pam8615 has short circuit protection ci rcuitry on the outputs to prevent damage to the device when output-to-output shorts (btl mode), output-to- gnd shorts, or output-to-vcc shorts occur. once a s hort-circuit is detected on the outputs, the output drive is imme diately disabled. this is a latched fault and must be reset by cycling the voltage on the sd pin to a logic low and back to the logic high state for normal operation. this will clear the short-circuit flag and a llow for normal operation if the short was removed. if the short was not removed, t he protection circuitry will again activate. thermal protection thermal protection on the pam8615 prevents damage to the device when the internal die temperature exceeds +160c. there is a 1 5 degree tolerance on this trip point from device to device. once the die temperature exceeds the set thermal point, the device enters i nto the shutdown state and the outputs are disabled. this is not a latched fault. t he thermal fault is cleared once the temperature of the die i s reduced by +40c. the device begins normal operation at this point without external system intervention. master-slave and sync operation the ms/sl and sync terminals can be used to synchronize the frequency of the class-d output switching. when the ms/sl is high o r left floating due to the internal pull up resistor, the switching freque ncy is determined by the rosc. the sync becomes an output wh ose source/sink current is about 0.5ma, and the frequency of this out put is also determined by the rosc. and this output can be con nected to another pam8615 who is configured in the slave mode. the output switching is synchronized to avoid any beat frequencies that oc cur in the audio band when two class-d amplifiers in the same system are sw itching at the slight different frequencies. when the ms/sl is low, the switching frequency is determined by the incoming square wave on the sync input. the snyc becomes an input in this mode and acc ept a square wave from another pam8615 configured in t he master mode or from an external gpio. (key: ms/sl = ?h?, master mode, ms/sl = ?l?, slave mode)
pam8615 document number: dsxxxxx rev. 1 - 1 12 of 14 www.diodes.com october 2012 ? diodes incorporated pam8615 a product line o f diodes incorporated ordering information part number package type standard package PAM8615RHR tssop-24 3000 units/tape & reel marking information
pam8615 document number: dsxxxxx rev. 1 - 1 13 of 14 www.diodes.com october 2012 ? diodes incorporated pam8615 a product line o f diodes incorporated package outline dimensions (all dimensions in mm.) tssop-24
pam8615 document number: dsxxxxx rev. 1 - 1 14 of 14 www.diodes.com october 2012 ? diodes incorporated pam8615 a product line o f diodes incorporated important notice diodes incorporated makes no warranty of any kind, express or implied, with regards to this document, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose (and their equivalents under the laws of any jurisdiction). diodes incorporated and its subsidiaries rese rve the right to make modifications, enhanc ements, improvements, corrections or ot her changes without further notice to this document and any product descri bed herein. diodes incorporated does not assume any liability ari sing out of the application or use of this document or an y product described herein; neither does di odes incorporated convey any license under its patent or trademark rights, nor the rights of others. any customer or us er of this document or products described herein in such applica tions shall assume all risks of such use and will agree to hold diodes incorporated a nd all the companies whose products are represented on diodes incorporated website, harmless against all damages. diodes incorporated does not warrant or accept any liability w hatsoever in respect of any products purchased through unauthoriz ed sales channel. should customers purchase or use diodes inco rporated products for any unintended or una uthorized application, customers shall i ndemnify and hold diodes incorporated and its representativ es harmless against all claims, damages, expenses, and attorney fees arising out of, directly or indirectly, any claim of personal injury or death a ssociated with such unintended or unauthorized application. products described herein may be covered by one or more united states, international or foreign patents pending. product names and markings noted herein may also be covered by one or more united states, international or foreign trademarks. this document is written in english but may be translated into multiple languages for reference. only the english version of t his document is the final and determinative format released by diodes incorporated. life support diodes incorporated products are specifically not authorized for use as critical component s in life support devices or systems without the express written approval of the chief executive offi cer of diodes incorporated. as used herein: a. life support devices or syst ems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when proper ly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in significant injury to the user. b. a critical component is any component in a life support devic e or system whose failure to perform can be reasonably expect ed to cause the failure of the life support device or to affect its safety or effectiveness. customers represent that they have all necessary expertise in the safety and regulatory ramifi cations of their life support dev ices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-rel ated requirements concerning the ir products and any use of diodes incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or s ystems-related information or support that may be provided by diodes incorporated. further, customers must fully indemnify diodes incorporate d and its representatives against any damages arisi ng out of the use of diodes incorporated pr oducts in such safety-critical, life suppor t devices or systems. copyright ? 2012, diodes incorporated www.diodes.com

▲Up To Search▲

Price & Availability of PAM8615RHR

	To Download PAM8615RHR Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .