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4.6W DUAL AUDIO POWER AMPLIFIER
GENERAL DESCRIPTION
D6283 is an audio power IC with built-in two Channels developed for portable radio cassette tape r e c o r d e r. built in . Because of the parts reduction and SIP line package), space merit is remarkable. (Single in Thermal shut down protection circuit is
D6283
F E ATU R E S
High Power : ( V c c = 9 V, R L = 4 , f = 1 k H z , T H D = 1 0 % ) : ( V c c = 1 2 V, R L = 4 , f = 1 k H z , T H D = 1 0 % ) Outline Drawing P o u t = 2 . 5 W / C H ( Ty p . ) P o u t = 4 . 6 W / C H ( Ty p . )
Low popping noise at power ON S m a l l Q u i e s c e n t C u r r e n t : I C C Q = 1 9 m A ( Ty p . ) Soft Clip Built-in thermal shut down protection circuit B e s t f o r s u p p l y v o l t a g e 9 V, 1 2 V Operation supply voltage range : Vcc=6~15V ( V c c = 9 V Vi n = 0 )
M A X I M U M R AT I N G S ( Ta = 2 5 C)
CHARACTERISTIC Supply Output Vo l t a g e Current (Peak/CH) SYMBOL Vcc IQ(peak) PD To p r Ts t g R AT I N G 20 2.5 12.5 -20~75 -55~150 UNIT V A W C C
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Power Dissipation O p e r a t i n g Te m p e r a t u r e St o r a g e Te m p e r a t u r e
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T YP I CA L D C VO LTA G E O F E ACH T E RM I N A L ( V c c = 9 V, Ta = 2 5 C )
TERMINAL NO. D C V O LTA G E ( V ) 1 8.2 2 4.5 3 8.9 4 5 6 7 8 9 10
D6283
11 8.2
12 Vcc
0.6 0.01 GND 0.01 0.6 GND 4.5
E L E CT R I C A L CH A R A CT E RI S T I C S
( U n l e s s o t h e r w i s e s p e c i f i e d , V c c = 9 V, f = 1 k H z , R g = 6 0 0 , R L = 4 , Ta = 2 5 C )
CHARACTERISTIC Quiescent Current Output Power To t a l H a r m o n i c Distortion Vo l t a g e G a i n Input Resistance O u t p u t N o i s e Vo l t a g e Ripple Rejection Ratio C r o s s Ta l k I n p u t O ff s e t Vo l t a g e
SYMBOL ICCQ POUT(1) POUT(2) THD Gv(1) Gv(2) RIN VNO R.R C.T V5,V7
TEST CONDITION VIN=0 THD=10% THD=10%,Vcc=12V Pout=1W/CH R f = 8 2 , Vo u t = 0 d B m R f = 0 , Vo u t = 0 d B m Rg=10k, BW=20Hz~20kHZ R g = 6 0 0 , V R I P = 0 . 2 Vr m s fRIP=100Hz Rg=600.Amp12 Vo u t = 0 d B m , f = 1 k H z -
M I N . T Y P. M A X . U N I T 2.0 43 19 2.5 4.6 0.2 45 56 30 0.3 54 60 20 45 1.0 47 mA W % dB k
1 . 0 m Vr m s 60 dB dB mV
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T ES T CI RCUI T & B LO CK DI AG RAM
12 C10 2200uF B.S.1 C4 100uF 1000uF 2 0.15uF 20K BIAS CIRCUIT THERMAL SHUT DOWN PROTECTION CIRCUIT RL C6 C8 OUT - 1 Vcc
D6283
*CIN IN - 1 C1 47uF 5 Rf1 82 4
IN1 NF1 30 Ripple 220uF
1 + ch - 1 -
C3 *C IN IN - 2 C2 47uF Rf2 82
3
7 8
IN2 NF2 30
+ ch - 2 10 100uF C5 11 20K 6 Pre - GND 9
C9 C7
1000uF OUT - 2 RL
B.S.2
Power - GND
*
This IC can be used without coupling capacitor (CIN), If volume slide noise occurred by
input offset voltage is undesirable, it needs to use the capacitor (CIN).
A P P L I C ATI O N I N F O R M AT I O N A N D A P P L I C ATI O N M E T H O D
1. A D J U S T M E N T O F V O LTA G E G A I N
The voltage gain Gv is obtained as follows by R1,R2 and Rf in Fig.1. Gv=20log((Rf+R1+R2)/(Rf+R1)) When Rf=0 When Rf=82 G v = 5 6 d B ( Ty p . ) G v = 4 5 d B ( Ty p . )
Rf 5/7 4/8 INPUT R1 30 + OUTPUT AMP R2 20K 2/10
By increasing Rf, reduction of Gv is p o s s i b l e , H o w e v e r, s i n c e t h e f e e d b a c k
0.15uF
Fig1. increase is liable to produce oscillation ,
i t i s r e c o m m e n d e d t o u s e t h i s a t 4 0 d B o r o v e r. SHAOXING SILICORE TECHNOLOGY CO.,LTD www. Silicore. com. cn
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2 . T H E R M A L S H U T- D O WN C I R C U I T
D6283
The thermal shut-down circuit is built in for purpose of preventing the destruction of IC due to the abnormal temperature rise when the heat radiation is insufficient. T h e o p e r a t i o n t e m p e r a t u r e i s s e t a t r a d i a t i o n F i n t e m p e r a t u r e 1 7 5 C ( Ty p . ) At this temperature or over the bias is interrupted to prevent the destruction of IC.
3 . I N P U T S TA G E
The input circuit of this IC is as shown in Fig.2. PNP TR:Q1 is provided in the input circuit so as to make its usage possible without the input coupling
CIN INPUT 5/7 Q1 30 6 Pre - GND to BIAS 4/8 Rf 47uF Q2 Q3 OUTPUT 20K 2/10
c a p a c i t o r. H o w e v e r, a t p i n s 5 a n d 7 , m a x 60mV offset voltage is produced.
to DRIVER 30
4. Application
slide noise
after is
checking
volume For
recommended.
cutting the volume slide noise, Insert the input capacitor: CIN in series to interrupt the DC component. 5.
Fig.2
O SC I L AT I O N P R E V E N T I V E M E A S U R ES
it is recommended to use polyester film capacitor having good
For oscillation preventive capacitor C6 and C7 between the output terminal and GND,
c h a r a c t e r i s t i c s f o r t e m p e r a t u r e a n d f o r h i g h f r e q u e n c y. Since the characteristics of the capacitor is liable to be influenced by the temperature, use this capacitor after the temperature test to check the oscillation allowance. In addition, as the position of the electrolytic capacitor has a remarkable influence on the oscillation, connect C10 to Vcc at the nearest possible position from power GND. At using this application with the voltage gain reduced, oscillation is liable to be p r o d u c e d . A p p l y t h e c a p a c i t o r a f t e r c h e c k i n g e n o u g h f o r i t s c a p a c i t y, t y p e a n d mounting position. SHAOXING SILICORE TECHNOLOGY CO.,LTD www. Silicore. com. cn
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standard printed board is recommended to be referred to design it.
D6283
As the oscillation allowance varies according to the printed pattern layout, the
6 . I N P U T V O LTA G E
When the excessive signal is input, turning-up is produced in the clip waveform. T h e t u r n i n g - u p p o i n t i s V I N = 3 0 0 m Vr m s ( Ty p . ) : V c c = 9 V, R L = 4 , f = 1 k H z : E n o u g h care must be taken for this phenomenon.
C H A R A C T E R I S T I C S C U RV E S
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D6283
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D6283
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