View PAM8303CCYC_8967210.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

pam8303c document number: dsxxxxx rev. 1 - 2 1 of 17 www.diodes.com june 2013 ? diodes incorporated pam8303c a product line o f diodes incorporated ultra low emi, 3w filterless mono class-d audio power amplifier description the pam8303c is a 3w mono filterless class-d amplifier with high psrr and differential input that eliminate noise and rf rectification. features like 90% efficiency and small pcb area make the pam8303c class-d amplifier ideal for cellular handsets. the filterless architecture requires no external output filter, fewer external components, less pcb area and lower system costs, and simplifies application design. the pam8303c features short circuit protection and thermal shutdown. the pam8303c is available in 9-ball wcsp, msop-8 and dfn 3x3 8-pin packages. features ? ultra low emi, -20db better than fcc class-b @ 300mhz ? high efficiency up to 90% @1w with an 8 ? speaker ? shutdown current <1a ? 3w@10% thd output with a 4 ? load at 5v supply ? demanding few external components ? superior low noise without input ? supply voltage from 2.8v to 5.5v ? short circuit protection ? thermal shutdown ? available in space saving packages: 1.45mmx1.45mm wcsp9, msop-8, dfn3x3-8 ? pb-free package applications ? cellular phones/smart phones ? mp4/mp3 ? gps ? digital photo frame ? electronic dictionary ? portable game machines pin assignments
pam8303c document number: dsxxxxx rev. 1 - 2 2 of 17 www.diodes.com june 2013 ? diodes incorporated pam8303c a product line o f diodes incorporated typical applications circuit pin descriptions pin name pin name function wcsp(a) dfn3x3-8 (b) dfn3x3-8 (c) msop-8 (b) out+ c3 1 5 1 positive btl output pvdd b2 2 ? 2 power supply vdd b1 3 6 3 analog power supply in- c1 4 4 4 negative differential input in+ a1 5 3 5 positive differential input sd c2 6 1 6 shutdown terminal (active low) gnd a2, b3 7 7 7 ground out- a3 8 8 8 negative btl output nc ? ? 2 ? functional block diagram
pam8303c document number: dsxxxxx rev. 1 - 2 3 of 17 www.diodes.com june 2013 ? diodes incorporated pam8303c a product line o f diodes incorporated 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 6.0 v input voltage -0.3 to v dd +0.3 maximum junction temperature 150 c storage temperature -65 to +150 soldering temperature 250, 10 sec recommended operating conditions (@t a = +25c, unless otherwise specified.) parameter rating unit supply voltage range 2.8 to 5.5 v ambient temperature range -40 to +85 c junction temperature range -40 to +125 c thermal information parameter package symbol max unit thermal resistance (junction to ambient) wcsp 1.45x1.45 ja 90-220 c/w msop-8 180 dfn3x3-8 47.9 thermal resistance (junction to case) msop-8 jc 75 note : for the 9-pin csp package, the thermal resist ance is highly dependent on the pcb heat sink area. for example, the ja can equal to 195c/w with 50mm 2 total area or 135c/w with 500mm 2 area. when using ground and power planes, the value is around 90c/w.
pam8303c document number: dsxxxxx rev. 1 - 2 4 of 17 www.diodes.com june 2013 ? diodes incorporated pam8303c a product line o f diodes incorporated electrical characteristics (@t a = +25c, v dd = 5v, gain = 2v/v, r l = l(33h) + r + l(33h), unless otherwise specified.) symbol parameter test conditions min typ max units v dd supply voltage 2.8 5.5 v p o output power thd+n = 10%, f = 1khz, r = 4 ? v dd = 5.0v 2.85 3.00 w v dd = 3.6v 1.65 1.80 v dd = 3.2v 1.20 1.35 thd+n = 1%, f = 1khz, r = 4 ? v dd = 5.0v 2.50 2.66 w v dd = 3.6v 1.15 1.30 v dd = 3.2v 0.85 1.0 thd+n = 10%, f = 1khz, r = 8 ? v dd = 5.0v 1.65 1.8 w v dd = 3.6v 0.75 0.9 v dd = 3.2v 0.55 0.7 thd+n = 1%, f = 1khz, r = 8 ? v dd = 5.0v 1.3 1.5 w v dd = 3.6v 0.55 0.72 v dd = 3.2v 0.40 0.55 thd+n total harmonic distortion plus noise v dd = 5.0v, p o = 1w, r = 8 ? f = 1khz 0.28 0.35 % v dd = 3.6v, p o = 0.1w, r = 8 ? 0.40 0.45 v dd = 3.2v, p o = 0.1w, r = 8 ? 0.55 0.60 v dd = 5.0v, p o = 0.5w, r = 4 ? f = 1khz 0.20 0.25 % v dd = 3.6v, p o = 0.2w, r = 4 ? 0.35 0.40 v dd = 3.2v, p o = 0.1w, r = 4 ? 0.5 0.55 psrr power supply ripple rejection v dd = 3.6v, inputs ac-grounded with c in = 1f f = 217hz -63 -55 db f = 1khz -62 -55 f = 10khz -52 -40 dyn dynamic range v dd = 5v, thd = 1%, r = 8 ? f = 1khz 85 95 v n output noise inputs ac-grounded no a-weighting 50 100 v a-weighting 30 60 cmrr common mode rejection ratio v ic = 100m, v pp , f =1khz 40 63 db peak efficiency r l = 8 ? , thd = 10% f = 1khz 85 90 r l = 4 ? , thd = 10% 80 86 % i q quiescent current v dd = 5.0v r = 8 ? 7.5 10 v dd = 3.6v 4.6 7 v dd = 3.0v 3.6 5 ma i sd shutdown current v dd = 3.0v to 5.0v v sd = 0.3v 0.5 2 a r ds(on) static drain-to-source on-state resistor csp package, high side pmos plus low side nmos, i = 500ma v dd = 5.0v 280 350 v dd = 3.6v 300 375 v dd = 3.0v 325 400 msop/dfn package, high side pmos plus low side nmos, i = 500ma v dd = 5.0v 365 420 v dd = 3.6v 385 450 v dd = 3.0v 410 500 r in input resistance 150 k ? f sw switching frequency v dd = 3v to 5v 200 250 300 khz g v closed loop gain v dd = 3v to 5v 300k ? /r i db v os output offset voltage input ac-ground, v dd = 5v 10 50 mv v ih enable input high voltage v dd = 5v 1.5 v v il enable input low voltage v dd = 5v 0.3 v
pam8303c document number: dsxxxxx rev. 1 - 2 5 of 17 www.diodes.com june 2013 ? diodes incorporated pam8303c a product line o f diodes incorporated typical performance characteristics (@t a = +25c, v dd = 5v, f = 1khz, gain = 2v/v, unless otherwise specified.)
pam8303c document number: dsxxxxx rev. 1 - 2 6 of 17 www.diodes.com june 2013 ? diodes incorporated pam8303c a product line o f diodes incorporated typical performance characteristics (cont.) (@t a = +25c, v dd = 5v, f = 1khz, gain = 2v/v, unless otherwise specified.)
pam8303c document number: dsxxxxx rev. 1 - 2 7 of 17 www.diodes.com june 2013 ? diodes incorporated pam8303c a product line o f diodes incorporated typical performance characteristics (cont.) (@t a = +25c, v dd = 5v, f = 1khz, gain = 2v/v, unless otherwise specified.)
pam8303c document number: dsxxxxx rev. 1 - 2 8 of 17 www.diodes.com june 2013 ? diodes incorporated pam8303c a product line o f diodes incorporated typical performance characteristics (cont.) (@t a = +25c, v dd = 5v, f = 1khz, gain = 2v/v, unless otherwise specified.)
pam8303c document number: dsxxxxx rev. 1 - 2 9 of 17 www.diodes.com june 2013 ? diodes incorporated pam8303c a product line o f diodes incorporated typical performance characteristics (cont.) (@t a = +25c, v dd = 5v, f = 1khz, gain = 2v/v, unless otherwise specified.)
pam8303c document number: dsxxxxx rev. 1 - 2 10 of 17 www.diodes.com june 2013 ? diodes incorporated pam8303c a product line o f diodes incorporated application information 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 speake r for efficiency measurement. input resistance (ri) the input resistors (r i ) set the gain of the amplifier according to equation 1. ? ? ? ? ? ? ? ? v v r k150x2 gain i resistor matching is very important in fully differential amplifiers. the balance of the output on the reference voltage depend s on matched ratios of the resistors. cmrr, psrr, and cancellation of the second har monic distortion diminish if resi stor mismatch occurs. therefor e, it is recommended to use 1% tolerance resistors or better to keep the per formance optimized. matching is more important than overall tolerance. resistor arrays with 1% matching can be used with a tolerance greater than 1%. place the input resistors very close to the pam8303c to limit noise injection on the high impedance nodes. for optimal performance the gain should be set to 2x (r i = 150k) or lower. lower gain allows the pam8303c to operate at its best, and keeps a high voltage at the input making the inputs less susceptible to noise. in addition to these features, higher value of r i minimizes pop noise. input capacitors (c i ) in the typical application, an input capacitor, c i , is required to allow the amplifier to bias the input signal to the proper dc level for optimum operation. in this case, ci and the minimum input impedance r i form is a high-pass filter with the corner frequency determined in the follow equation: c r2 1 f i i c ? ? it is important to consider the value of c i as it directly affects the low frequency performance of the circuit. for example, when r i is 150k ? and the specification calls for a flat bass response are down to 150hz. equat ion is reconfigured as followed: f r2 1 c ci i i ? ? when input resistance variat ion is considered, the c i is 7nf, so one would likely choose a value of 10nf. a further consideration for this capacitor is the leakage path from the i nput source through the input network (c i , r i + r f ) to the load. this leakage current creates a dc offset voltage at the input to the amplifier that reduces useful headroom, especially in high gain applications. for this reason, a low-leakage tantalum or ceramic capacitor is the best choice. w hen polarized capacitors are used, the positi ve side of the capacitor should face the amplifier input in mo st applications as the dc level is held at v dd /2, which is likely higher than the source dc level. please note that it is important to confirm the capacitor polarity in the application.
pam8303c document number: dsxxxxx rev. 1 - 2 11 of 17 www.diodes.com june 2013 ? diodes incorporated pam8303c a product line o f diodes incorporated application information (cont.) decoupling capacitor (c s ) the pam8303c is a high-performance cmos audio amplifier that requires adequate power supply decoupling to ensure the output tot al harmonic distortion (thd) as low as possible. power supply decoupling also prev ents the oscillations causing by long lead lengt h between the amplifier and the speaker. the optimum decoupling is achieved by using two different types of capacitors that ta rget on different types of noise on the po wer supply leads. for higher frequency transients, spikes, or digital hash on the line, a good low equiva lentseries- resistance (esr) ceramic cap acitor, typically 1f, is placed as close as possible to the device each v dd and pv dd pin for the best operation. for filtering lower frequency noise signals, a large ceramic capacitor of 10f or greater plac ed near the audio power amplifier is recommended. how to reduce emi most applications require a ferrite bead filter for emi eliminati on shown at figure 1. the ferrite filter reduces emi around 1m hz and higher. when selecting a ferrite bead, choose one with high impedance at high frequencies, but low impedance at low frequencies. figure 1: ferrite bead filter to reduce emi in order to reduce power consumption while not in use, the pam8303c contains shutdown circuitry t hat is used to turn off the am plifier?s bias circuitry. this shutdown feature turns the amplifier off when l ogic low is placed on the sd pin. by switching the shutdown pin connected to gnd, the pam8303c supply current draw will be minimized in idle mode. shutdown operation in order to reduce power consumption while not in use, the pam8303c contains shutdown circuitry t hat is used to turn off the am plifier?s bias circuitry. this shutdown feature turns the amplifier off when l ogic low is placed on the pin. by switching the shutdown pin con nected to gnd, the pam8303c supply current draw will be minimized in idle mode. under voltage lock-out (uvlo) the pam8303c incorporates circuitry designed to detect low supply voltage. when the suppl y voltage drops to 2.3v or below, the pam8303c goes into a state of shutdown, and the device comes out of its shutdown state and restore to normal function only when reset th e power supply or sd pin. thermal protection on the pam8303c prevents the device from damage when the internal die temperature exceeds +135c. there is a 15c tolerance on this trip point from device to device. once the die temperature exce eds the set point, the device will enter the s hutdown state and the outputs are disabled. this is not a latched fault. the therma l fault is cleared once the tem perature of the die decreased b y 30c. this large hysteresis will prevent motor boating sound well and the device begins normal operation at this point with no external system i nteraction. pop and click circuitry the pam8303c contains circuitry to minimize turn-on and turn-off transients or ?click and pops?, where turn-on refers to either power supply turn- on or device recover from shutdown mode. when the device is turned on, the amplifiers are internally muted. an internal current source ramps up the internal reference voltage. the device will remain in mute mode until the reference voltage reach half supply voltage, 1 /2 v dd . as soon as the reference voltage is stable, the device will begin full operat ion. for the best power-off pop performance, the amplifier sh ould be set in shutdown mode prior to removing the power supply voltage.
pam8303c document number: dsxxxxx rev. 1 - 2 12 of 17 www.diodes.com june 2013 ? diodes incorporated pam8303c a product line o f diodes incorporated application information (cont.) pcb layout guidelines grounding it is recommended to use plain grounding or separate grounds. do not use one line connecting powe r gnd and analog gnd. noise cu rrents in the output power stage need to be returned to output noise ground and nowhere else. when these currents circulate elsewhere, th ey may get into the power supply, or the signal ground, etc, even worse, th ey may form a loop and radiate noise. any of these instances re sults in degraded amplifier performance. the output noise ground that the logical re turns for the output noise currents associated with class-d s witching must tie to system ground at the power exclusively. signal currents for the inputs, reference need to be returned to quite ground. this ground only ties to the signal components and the gnd pin. gnd then ties to system ground. power supply line as same to the ground, v dd and pv dd need to be separately connected to the system power supply. it is recommended that all the trace could be routed as short and thick as possible. for the power line lay out, just imagine water stream, any barricade placed in the tra ce (shown in figure 2) could result in the bad performance of the amplifier. figure 2. power line components placement decoupling capacitors-as previously descr ibed, the high-frequency 1f decoupling capacit ors should be placed as close to the po wer supply terminals (v dd and pv dd ) as possible. large bulk power supply decoupling capacitors (10f or grea ter) should be placed near the pam8303c on the pv dd terminal. input resistors and capacitors need to be placed very close to input pins. output filter - the ferrite emi filter s hould be placed as close to the output terminals as possible for the best emi performan ce, and the capacitors used in the filters should be grounded to system ground.
pam8303c document number: dsxxxxx rev. 1 - 2 13 of 17 www.diodes.com june 2013 ? diodes incorporated pam8303c a product line o f diodes incorporated ordering information part number part marking package type standard package pam8303cazn bh yw wcsp 9 3000 units/tape&reel pam8303cbyc p8303c xxxyw dfn3x3-8 3000 units/tape&reel PAM8303CCYC p8303c xxxyw dfn3x3-8 3000 units/tape&reel pam8303cbsc p8303c xxxyw msop-8 2500 units/tape&reel marking information
pam8303c document number: dsxxxxx rev. 1 - 2 14 of 17 www.diodes.com june 2013 ? diodes incorporated pam8303c a product line o f diodes incorporated marking information package outline dimensions (all dimensions in mm.) wcsp
pam8303c document number: dsxxxxx rev. 1 - 2 15 of 17 www.diodes.com june 2013 ? diodes incorporated pam8303c a product line o f diodes incorporated package outline dimensions (cont.) (all dimensions in mm.) msop-8
pam8303c document number: dsxxxxx rev. 1 - 2 16 of 17 www.diodes.com june 2013 ? diodes incorporated pam8303c a product line o f diodes incorporated package outline dimensions (cont.) (all dimensions in mm.) dfn3x3-8
pam8303c document number: dsxxxxx rev. 1 - 2 17 of 17 www.diodes.com june 2013 ? diodes incorporated pam8303c 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 arising 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 and all the companies whose products are represented on diodes incorporated website, harmless against all damages. diodes incorporated does not warrant or accept any liability whatsoever 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 ? 2013, diodes incorporated www.diodes.com

▲Up To Search▲

Price & Availability of PAM8303CCYC

	To Download PAM8303CCYC Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .