41812 sy 20120203-s00005 no.a2051-1/7 http://onsemi.com semiconductor components industries, llc, 2013 may, 2013 la4631vc overview the la4631vc built-in a 2 channel single-ended output power amplifier that a power supply voltage range is wide and has additionally the standby function to reduce the current drain. it is a power amplifier ic suitable for driving speaker of various audio system equipments, which is especially useful for products that use batteries. functions ? output power = 4.5w (typical) (v cc = 12v, r l = 3 ? , thd+n = 10%) ? built in standby function (pin5) ? built in thermal suht down circuit specifications maximum ratings at ta = 25 c parameter symbol conditions ratings unit maximum supply voltage v cc max with no input signal 24 v maximum output current i o peak per channel 2.5 a allowable power dissipation pd max with an infinitely large heat sink 25 w operating temperature topr -20 to +75 c storage temperature tstg -40 to +150 c operating conditions at ta = 25 c parameter symbol conditions ratings unit recommended supply voltage v cc 12 v recommended load resistance range r l op 3 to 8 allowable operating supply voltage range v cc op 5.5 to 22 v *: v cc , r l , and output level such that pd max, is not exceeded for the size of heat sink used. orderin g number : ena2051 monolithic linear ic 2-channel se af power amplifier for home audio use stresses exceeding maximum ratings may damage the device. maximum ratings are stress ratings only. functional operation above the recommended oper ating conditions is not implied. extended exposure to stresses above the recommended operating conditions may affect device reliabili ty.
la4631vc no.a2051-2/7 electrical characteristics at ta = 25c, v cc = 12v, r l = 3 ? , f = 1khz, rg = 600 ? parameter symbol conditions ratings unit min. typ. max. quiescent current i cco rg = 0 ? 18 35 80 ma standby current ist 1 10 a voltage gain vg v o = 0dbm 33 35 37 db total harmonic distortion thd p o = 1w 0.15 0.4 % output power p o 1 thd = 10% 3.0 4.5 w p o 2 v cc = 9v, thd = 10% 2.0 2.5 w output noise voltage v no rg = 0 ? , bpf = 20hz to 20khz 0.05 0.25 mvrms ripple rejection svrr rg = 0 ? , f r = 100hz, v cc r = 0dbm 50 60 db channel separation chsep rg = 10k ? , v o = 0dbm 55 65 db input resistance ri 20 30 40 k ? standby pin applied voltage vst amp lifier on(pin 5 voltage) 1.5 5.0 v package dimensions unit : mm (typ) 3049c sanyo : sip12h 26.8 (20.0) (11.8) 1.0 min 13.2 max 1.0 2.0 4.0 7.0 6.0 0.5 0.4 1 12 (2.4) (8.4) (r1.7) 2.0 heat spreader pd max -- ta 100 ? 100 ? 1.5mm 3 50 ? 50 ? 1.5mm 3 0 5 10 15 20 25 30 -20 0 20 40 60 80 100 120 140 160 3.2 7 12.5 with an infinitely large heat sink single ic allowable power dissipation, pd max -- w ambient temperature, ta -- c
la4631vc no.a2051-3/7 block diagram application circuit example ripple filter la4631vc in1 pre gnd in2 standby p.p v cc out2 nc pwr gnd nc out1 + + + vstb 5v + + ++ v cc r l r l 12 11 10 9 8 7 6 5 4 3 2 1 top view
la4631vc no.a2051-4/7 external components and usage notes c1, c2 : these are input coupling ca pacitors; we recommend a value of 1 f or lower. the la4631vc input pin potential is about 1.4v, and th e polarity must be considered due to the dc potential of the circuits connected to the la4631vc front end. the amplifier's startup time (the time from the point power is first applied until the point an output is generated) will change proporti onally with the values of these input capacitors. (when 1 f capacitors are used, the startup time will be about 0.2 seconds.) c3 : this capacitor is used as a rippl e filter. we recommend a value of 100 f. amplifier impulse noise when turned off (when the standby pin goes low) may be made worse if a value under 100 f is used. the pin 1 voltage is about 1/2v cc . a dc mute function can be applied if pin 1 is connected to ground through a 300 to 500 resistor. note that the muting activation voltage will be too low if a resistor value of 750 or higher is used. c4 : this is an impulse noise preventio n capacitor. the recommended value is 4.7 f. if a value of 2.2 f or lower is used for c4, impulse noise when the amplifier is turned off (when the standby pin goes low) may be made worse. also, if a value of 10 f or higher is used, an "incomplete muting" phenomenon may occur when the amplifier is turned off (when the standby pin goes low). c5 : power supply capacitor. this capacitor should be located as close as possible to the ic (to minimize increases in the power supply line impedance) to achieve stable amplifier operation. c6, c7 : output capacitors. these capacitors influence the amplifiers low band fre quency characteristics. (fc = 1/2 cout r l ) fc = low band cutoff frequency, cout = c6, c7 (reference) pin 5 equivalent circuit inside ic (reference) pin 5 ic internal equivalent circuit standby applied voltage vx + rx ix ix=max 4.5ma 5 stby r2 2k ? r1 2k ? ? the amplifier can be turned on and off by controlling the level (high/low) of pin 5. ? applying a signal equal or greater than 1.5v and 800 a to pin 5 turns on the amplifier. (if 5v is applied directly to pin 5 the inflow current od pin 5 is approximately 4.5ma.) ? if a voltage, vx, exceeding 5v is to be applied, current limiting resi stor (rx) should be inse rted to limit the inflow current to 4.5ma. (see following equation.) rx = (vx ? 5v)/4.5ma ? if pin 5 is to be controlled by the microprocessor, the pin 5 inflow current (ix) should be optimized for the capacity of the microprocessor by calculating rx using the following equation, as a general guideline, and then confirming the inflow current through sctual measurement. rx = (vx/ix) ? r1 (2k ) note: when apply voltage to standby (pin 5), please add resistor (rx).
la4631vc no.a2051-5/7 10 20 40 110 0 2 4 6 12 12 0 18 6810 24 22 4 pd - p o (v cc =12v) 0 1 2 3 6 0 1 2 3 4 2 4 6 8 10 14 16 20 22 0 30 50 60 70 80 90 100 14 16 18 12 20 8 10 pd - p o (v cc =9v) i cc - p o (v cc =12v) i cc - p o (v cc =9v) 4 5 0 200 400 600 1200 800 1000 0 200 400 600 1200 800 1000 i cco -- v cc p o -- v cc thd -- p o thd -- f 0.1 23 57 1.0 10 23 57 10 23 57 100 23 57 1k 23 57 10k 23 57 100k 0.1 2 3 5 7 1.0 2 3 5 7 10 0.1 2 3 5 7 1.0 2 3 5 7 10 f = 1khz f = 100hz f = 10khz 0.1 23 57 1.0 10 23 57 0.1 23 57 1.0 10 23 57 0.1 23 57 1.0 10 23 57 0.1 23 57 1.0 10 23 57 v cc = 12v f = 1khz v cc = 12v f = 1khz v cc = 9v f = 1khz v cc = 9v f = 1khz quiescent current, i cco -- ma supply voltage, v cc -- v output power, p o -- w supply voltage, v cc -- v total harmonic distortion, thd -- % output power, p o -- w total harmonic distortion, thd -- % frequency, f -- hz consumption current, i cc -- marms output power, p o -- w output power, p o -- w output power, p o -- w output power, p o -- w power dissipation, pd -- w power dissipation, pd -- w consumption current, i cc -- marms
la4631vc ps no.a2051-6/7 25 27 31 37 0 1 2 3 6 0 0 29 33 35 4 5 0 0 10 23 57 100 23 57 1k 23 57 10k 23 57 100k 0.1 0.2 0 0.5 0 10 4681012141618 0.5 0.8 1.1 1.4 1.7 2.0 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 10 23 57 100 23 57 1k 23 57 10k 23 57 100k 10 23 57 100 23 57 1k 23 57 10k 23 57 100k 10 23 57 100 23 57 1k 23 57 10k 23 57 100k gain -- f p o -- f chsep -- f vno -- rg thd = 10% thd = 1% 20 30 40 50 60 70 80 ch1 ch2 ch2 ch1 0.3 0.4 10 23 57 100 23 57 1k 23 57 10k 23 57 100k svrr -- v cc svrr -- f r f r -- hz v cc r -- vrms svrr -- v cc r 10 20 30 40 50 60 70 80 20 22 10 20 30 40 50 60 70 80 10 20 30 40 50 60 70 80 10 20 30 40 50 60 70 80 i cco -- vstby vstby -- v 1.6 1.8 2.0 v cc = 12v r l = 3 rg = 0 f r = 100hz bpf = 20hz to 20khz svrr = 20log(v o /v cc r) v cc = 12v r l = 3 rg = 0 gain -- db frequency, f -- hz output power, p o -- w channel separation, chsep -- db output noise voltage, vno -- mvrms frequency, f -- hz frequency, f -- hz supply voltage rejection ratio, svrr -- db supply voltage, v cc -- v supply voltage rejection ratio, svrr -- db supply voltage rejection ratio, svrr -- db quiescent current, i cco -- ma
la4631vc ps no.a2051-7/7 on semiconductor and the on logo are registered trademarks of semiconductor components industries, llc (scillc). scillc owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. a listing of scillc?s product/patent coverage may be accessed at www.onsemi.com/site/pdf/patent-marking.pdf. scillc reserves the right to make changes without further notice to any products herein. scillc mak es no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does scillc assume any liability ar ising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequentia l or incidental damages. ?typical? parameters which may be provided in scillc data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. all operating parameters, including ?typicals? must be validated for each customer application by customer?s techn ical experts. scillc does not convey any license under its patent rights nor the rights of others. scillc products are not designed, intended, or authorize d for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other appli cation in which the failure of the scillc product could create a situation where personal injury or death may occur. should buyer purchase or use scillc products for any such unintended or unauthorized application, buyer shall indemnify and hold scillc and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of persona l injury or death associated with such unintended or unauthorized use, even if such claim alleges that scillc was negligent regarding the design or manufacture o fthe part. scillc is an equal opportunity/affirmative action employer. this literature is subject to all applicable copyright laws a nd is not for resale in any manner.
|
