specifications of any and all sanyo semiconductor co.,l td. products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer ' s products or equipment. to verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer ' sproductsor equipment. any and all sanyo semiconductor co.,ltd. products described or contained herein are, with regard to "standard application", intended for the use as general el ectronics equipment (home appliances, av equipment, communication device, office equipment, industrial equ ipment etc.). the products mentioned herein shall not be intended for use for any "special application" (medica l equipment whose purpose is to sustain life, aerospace instrument, nuclear control device, burning appliances, t ransportation machine, traffic signal system, safety equipment etc.) that shall require extremely high level of re liability and can directly threaten human lives in case of failure or malfunction of the product or may cause har m to human bodies, nor shall they grant any guarantee thereof. if you should intend to use our products for app lications outside the standard applications of our customer who is considering such use and/or outside the scope of our intended standard applications, please consult with us prior to the intended use. if there is n o consultation or inquiry before the intended use, our customer shall be solely responsible for the use. o0808 ms jk/92900rm(ot) no.6632-1/8 la4628 overview the la4628 is a 2-channel general-purpos e btl audio power amplifier provided in a miniature package. it was designed for the best possible audio quality and features an extended lo w band roll-off frequency provided by a newly-developed nf circuit that does not require an external capacitor. furtherm ore, crosstalk, which can cause muddiness in the audio output, has been significantly reduced by both circuit and wiring pa ttern improvements. thus this amplifier can provide powerful lows and clear highs. note that this device is pin compatible with the 13.5w 2-channel la4625, and allows end products differentiated by their power rating to share the same printed circuit board. features ? total output : 20w+20w (at v cc = 13.5v, r l = 4 ? , thd = 10%) ? high-fidelity design (f l < 10hz, f h = 130khz) ? extremely low impulse noise levels ? an arbitrary amplifier startup time can be set up with external components. ? full complement of built-in protection circuits (inc ludes circuits that protect against shorting to v cc , shorting to ground, load shorting, overvoltages and excessive temperatures) specifications maximum ratings at ta = 25 c parameter symbol conditions ratings unit maximum supply voltage v cc max no signal 24 v maximum output current i o peak per channel 4 a allowable power dissipation pd max with an arbitrarily large heat sink 32.5 w operating temperature topr -20 to +85 c storage temperature tstg -40 to +150 c monolithic linear ic for general audio 20w 2-channel btl power amplifier orderin g number : en6632a
la4628 no.6632-2/8 operating conditions at ta = 25 c parameter symbol conditions ratings unit recommended supply voltage v cc 13.5 v recommended load resistance range r l op 4 to 8 ? allowable operating supply voltage range v cc op 9 to 20 v note : with v cc , r l , and the output level in ranges such that th e pd max for the heat sink used is not exceeded. electrical characteristics at ta = 25 c, v cc = 13.5v, r l = 4 ? , f = 1khz, rg = 600 ? ratings parameter symbol conditions min typ max unit quiescent current i cco with rg = 0 and r l open. 70 130 250 ma standby mode current drain i st standby mode (amplifier off), with no power supply capacitor. 10 60 a voltage gain v g v o = 0dbm 38 40 42 db total harmonic distortion thd p o = 1w, filter = flat 0.06 0.2 % p o 1 v cc = 13.5v, thd = 10%, r l = 4 ? 16 20 w output power p o 2 v cc = 16.5v, thd = 10%, r l = 4 ? 30 w output offset voltage v n offset rg = 0 -300 +300 mv output noise voltage v no rg = 0, bpf = 20hz to 20khz 0.1 0.5 mv ripple rejection ratio svrr rg = 0, v r = 0dbm, f r = 100hz 40 50 db channel separation chsep rg = 10k ? , v o = 0dbm 50 60 db input resistance ri 21 30 39 k ? standby pin applied voltage v st amplifier on (applied through an external 10k ? resistor) 2.5 v cc v package dimensions unit : mm (typ) 3113b 0 pd max -- ta -20 35 25 30 15 20 10 5 20 0 40 60 80 100 120 140 160 f = 3 ? c/w f = 4 ? c/w f = 7 ? c/w jc = 2 ? c/w ? fin f = 10 ? c/w 32.5 20.83 13.9 10.4 3.1 infinite heat sink allowable power dissipation, pd max -- w ambient temperature, ta -- ? c ai heat sink mounting torque 39n cm flat washer silicone grease applied
la4628 no.6632-3/8 block diagram 0.1f 0.1f r4 c9** c8** r5 2.2 ? 2.2 ? r l 4 ? r l 4 ? -out2 +out2 ? + standby sw off ripple filter + bias circuit standby sw pop noise prevention circuit predriver predriver power power load short protector output pin to v cc short protector output pin to v cc short protector output pin to gnd short protector output pin to gnd short protector predriver predriver power power over voltage / surge protector thermal shut down load short protector v cc + + on r1 10k ? +5v c4 2.2f 10v 33f 10v 0.47f 10v 2.2f 10v c1 100f/16v v cc c5 2200f 25v + -out1 +out1 ? + power gnd2 + + c3 c10 ** (polyester film capacitor) + ? in c2 pre gnd in2 c3 sets the amplifier starting time (approximately 0.6 seconds when 33f) c10 impulse noise reduction (note : the device?s ability to withstand shorting to v cc or shorting to ground when v cc is around 16v may be reduced as the value of this capacitor is increased. we recommend 0.47f.) power gnd1 14 2 1 3 4 6 7 5 11 12 13 0.1f 0.1f r2 c7** c6** r3 2.2 ? 2.2 ? 9 10 8 + ? in
la4628 no.6632-4/8 pin voltages v cc = 13.5v, with 5v applied to stby through a 10k ? resistor, r l = 4 ? , rg = 0 pin no. 1 2 3 4 5 6 7 pin name in1 dc pre?gnd stby on time in2 pop pin voltage 1.55v 6.63v 0v 3.21v 2.32v 1.55v 2.07v pin no. 8 9 10 11 12 13 14 pin name +out2 -out2 pwr?gnd +out1 pwr?gnd -out1 v cc pin voltage 6.6v 6.5v 0v 6.5v 0v 6.6v 13.5v external components c1 and c4 : input capacitors. a value of 2.2 f is recommended. determine the polarity based on the dc potential of the circuit connected directly to the la4628 front end. note that the low band response can be adjusted by varying f l with the capacitors c1 and c4. c2 : decoupling capacitor (ripple filter) c3 : sets the amplifier starting time, which will be approximately 0.6 seconds for a value of 33 f. the starting time is proportional to the value of th is capacitor, and can be set to any desired value. c5 : power-supply capacitor c6, c7, c8, and c9 : oscillation prevention capacitors. use polyester f ilm capacitors (mylar capacitors) with excellent characteristics. (note that the se ries resistors r2, r3, r4, and r5 ar e used in conjunction with these capacitors to achieve stable ampl ifier operation.) a value of 0.1 f is recommended. c10 : impulse noise reduction capacitor. a value of 0.47 f is recommended. caution is required when selecting the value for this capacitor, since increasing its value influences the operation of the circuits that protect against shorting the amplifier output pins to v cc or to ground when higher v cc voltages (approximately 16v or higher) are used. r1 : standby switch current limiting resistor. a value of 10k ? is recommended when a voltage in the range 2.5 to 13.5v will be applied as the standb y switching voltage. note that this resistor is not optional : it must be included. ic internal characteristics and notes 1. standby function ? pin 4 is the standby switch. a voltage of 2.5v or higher must be applied through an external resistor to turn the amplifier on. ? if a voltage of over 13.5v will be applied as the standby mode switching voltage, use the following formula to determine the value of r1 so that the current entering at pin 4 remains under 500 a. ? 1.4 r1 = 500 a ? 10k ? 2. muting function ? pin 5 connects the capacitor that determines the starting tim e to prevent impulse noise. it can also be used to mute the amplifier output by shorting pin 5 to ground. when this function is used, the recovery time depends on c3. 4 r1 10k ? 500a or lower about 1.4v (2v be ) pin 4 internal equivalent circuit applied standby voltage
la4628 no.6632-5/8 3. impulse noise improvements ? while the la4628 achieves a low level of impulse noise, if even further reductions in impulse noise at power on/off (and when switching into or out of standby mode) a 0.47 f capacitor may be inserted between pin 7 and the pre gnd pin (pin 3). (pin 7 is the output amplifier bias pin. since the ability to withstand shorting the output pins to v cc or ground is reduced for supply voltages over 16v if the pin 7 capacitance is large, we recommend a value of 0.47 f or lower for this capacitor.) 4. protection circuits ? due to the system structure of the protection circuit for shorts to v cc or ground, if there is a dc resistance between the amplifier output pins and ground, the protection circuit may operate when power is first applied and the amplifier may fail to turn on. the basic design approach we recommend is not to adopt any designs in which there is a dc resistance between the amplifier outputs and ground. ? the la4628 includes a built-in thermal protection circuit to prevent the ic from being damaged or destroyed if abnormally high temperatures occur. this thermal protectio n circuit gradually reduces the output if the ic junction temperature (tj) reaches the range 170 to 180 c due to inadequate heat sinking or other problem. if the temperature falls, the amplifier will restart automatically. ? the la4628 also includes other protection circuits. use of these circuits also requires care during end product design and testing. 5. other notes ? the la4628 is a btl power amplifier. when testing th is device, the ground systems for the test equipment connected to ic inputs, and that for the test equipment connected to ic outputs, must be isolated. do not use a common ground. printed circuit pattern (copper foil side) gnd gnd v cc gnd c5 r2 c6 -out1 c1 14 la4628 1 + + + + + + in1 in2 c3 c2 r1 c4 c10 stb +out1 -out2 +out2 r3 c7 r4 c8 r5 c9
la4628 no.6632-6/8 15 16 17 18 0 25 p o -- v cc 6789 11 10 12 13 14 10 5 15 30 35 20 40 0.01 p o -- v in 1.0 23 57 10 23 57 100 23 57 1k 2 3 5 7 0.1 1.0 2 3 5 7 10 2 3 5 7 100 2 3 5 7 0 25 p o -- f thd -- p o 10 100 1k 10k 100k 23 57 3 57 2357 2357 2 5 10 15 20 -10 -8 -6 -4 -2 0 2 f response 10 23 57 100 23 57 1k 23 57 10k 100k 23 57 0.01 10 7 5 3 2 7 5 3 2 7 5 3 2 0.1 1.0 23 57 10 23 57 100 23 57 1.0 0.1 0.01 2 3 5 7 0.1 2 3 5 7 1.0 10 2 3 5 7 thd -- p o 0.1 23 57 1.0 23 57 10 100 23 57 -10 -40 -50 -60 -70 -80 -90 0.01 0.1 2 3 5 7 1.0 2 3 5 7 10 2 3 5 7 thd -- f 10 23 57 100 23 57 1k 23 57 10k 100k 23 57 chsep -- f 10 100 23 57 1k 23 57 10k 23 57 100k 23 57 -30 -20 v cc = 13.5v r l = 4 ? rg = 10k ? v o = 0dbm f = 1khz rg = 600 ? thd = 10% v cc = 13.5v r l = 4 ? f = 1khz v cc = 13.5v r l = 4 ? rg = 600 ? v o = 0dbm at 1khz v cc = 13.5v r l = 6 ? rg = 600 ? r l = 4 ? r l = 6 ? v cc = 13.5v r l = 4 ? rg = 600 ? v cc = 13.5v r l = 4 ? rg = 600 ? v cc = 13.5v r l = 4 ? r o = 1w thd = 10% thd = 1% 10khz 100hz 1khz thd = 3% 10khz 100hz 1khz 0 input voltage, v in -- mvrms output power, p o -- w supply voltage, v cc -- v frequency, f -- hz frequency, ta -- c response -- db output power, p o -- w output power, p o -- w frequency, f -- hz output power, p o -- w output power, p o -- w total harmonic distortion, thd -- % total harmonic distortion, thd -- % total harmonic distortion, thd -- % frequency, f -- hz channel separation, chsep -- db ch1 2 ch2 1
la4628 no.6632-7/8 v no -- rg 2 100 357 2 1k 357 2 10k 100k 357 7 5 3 2 1.0 7 5 3 2 0.1 0.01 svrr -- v cc svrr -- f r 7 9 11 13 15 17 19 21 23 5 0 -20 -40 -60 -80 -100 -120 -100 svrr -- v cc r pd -- p o (r l = 4 ? ) pd -- p o (r l = 6 ? ) 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 -80 -60 -40 -20 -100 -80 -60 -40 -20 0 10 23 57 100 23 57 1k 23 57 10k 100k 23 57 0 32 28 24 20 16 12 0.1 1.0 23 57 10 23 57 100 23 57 32 28 24 20 18 12 8 4 0 0.1 1.0 10 100 23 57 23 57 23 57 0 1 2 3 4 5 6 i cc -- p o 0.1 23 57 1.0 23 57 100 10 23 57 v cc = 13.5v r l = 4 ? din audio rg = 0 f r = 100hz v cc r = 0dbm v cc = 13.5v r l = 4 ? rg = 0 v cc r = 0dbm v cc = 13.5v r l = 4 ? rg = 0 ? r l = 4/6 ? rg = 600? f = 1khz pd(16.5v) r l = 4 ? r l = 6 ? pd(13.5v) 100hz out1 3khz out1 3khz out2 100hz out2 pd (16.5v) pd (13.5v) v o v cc r out1 out2 out2 out1 supply voltage, v cc -- v ripple rejection ratio, svrr -- db ripple rejection ratio, svrr -- db signal source resistance, rg -- ? power supply ripple, v cc r -- vrms ripple frequency, f r -- hz output power, p o -- w/ch output power, p o -- w/ch output noise voltage, v no -- mvrms ripple rejection ratio, svrr -- db power dissipation, pd -- w power dissipation, pd -- w current drain, i cc -- a output power, p o -- w/ch r l = 6 ? rg = 600 ? f = 1khz calculated at pd = (v cc i cc ) - (2p o ) calculated at svrr = 20log r l = 4 ? rg = 600 ? f = 1khz calculated at pd = (v cc i cc ) - (2p o )
la4628 ps no.6632-8/8 sanyo semiconductor co.,ltd. assumes no responsib ility for equipment failures that result from using products at values that exceed, even momentarily, rate d values (such as maximum ra tings, operating condition ranges, or other parameters) listed in products specif ications of any and all sanyo semiconductor co.,ltd. products described or contained herein. sanyo semiconductor co.,ltd. strives to supply high-qual ity high-reliability products, however, any and all semiconductor products fail or malfunction with some probabi lity. it is possible that these probabilistic failures or malfunction could give rise to acci dents or events that could endanger human lives, trouble that could give rise to smoke or fire, or accidents that could cause dam age to other property. when designing equipment, adopt safety measures so that these kinds of accidents or e vents cannot occur. such measures include but are not limited to protective circuits and error prevention c ircuits for safe design, redundant design, and structural design. upon using the technical information or products descri bed herein, neither warranty nor license shall be granted with regard to intellectual property rights or any other rights of sanyo semiconductor co.,ltd. or any third party. sanyo semiconductor co.,ltd. shall not be liable f or any claim or suits with regard to a third party's intellctual property rights which has resulted from the use of the technical information and products mentioned above. information (including circuit diagr ams and circuit parameters) herein is for example only; it is not guaranteed for volume production. any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. when designing equi pment, refer to the "delivery specification" for the sanyo semiconductor co.,ltd. product that you intend to use. in the event that any or all sanyo semiconductor c o.,ltd. products described or contained herein are controlled under any of applicable local export control laws and regulations, such products may require the export license from the authorities conc erned in accordance with the above law. no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any in formation storage or retrieval system, or otherwise, without the prior written consent of sanyo semiconductor co.,ltd. this catalog provides information as of october, 2008. specifications and information herein are subject to change without notice.
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