TIGER ELECTRONIC CO.,LTD KIA6282K 4.6W DUAL AUDIO POWER AMPLIFIER GENERAL DESCRIPTION D6282 is an audio power IC with built-in two Channels developed for portable radio cassette tape recorder with power ON/OFF switch. Thermal shut down protection circuit is built in. Because of the parts reduction and SIP (Single in line package), space merit is remarkable. F E ATU R E S High Power O u t l i n e D r a wi n g P o u t = 2 . 5 W / C H ( Ty p . ) : ( V c c = 9 V, R L = 4 Ω , f = 1 k H z , T H D = 1 0 % ) P o u t = 4 . 6 W / C H ( Ty p . ) : ( V c c = 1 2 V, R L = 4 Ω , f = 1 k H z , T H D = 1 0 % ) 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 . ) ( V c c = 9 V Vi n = 0 ) 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 MAXIMUM RATINGS ( Ta = 2 5°C) CHARACTERISTIC SYMBOL R AT I N G UNIT Vo l t a g e Vcc 20 V Current (Peak/CH) IQ(peak) 2.5 A Power Dissipation PD 12.5 W O p e r a t i n g Te m p e r a t u r e To p r -20~75 °C St o r a g e Te m p e r a t u r e Ts t g -55~150 °C Supply Output D6282 TYPICAL DC VO LTAGE OF EACH TERMINAL ( V c c = 9 V, Ta = 2 5 ° C ) TERMINAL NO. 1 2 3 4 5 D C V O LTA G E ( V ) 8.2 4.5 Vcc 8.9 0.6 6 7 8 9 10 11 12 0.01 0.01 0.6 GND 4.5 8.2 Vcc *3 pin is connected to Vcc ELECTRICAL CHARACTERISTICS ( 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 Ω , R L = 4 Ω , Ta = 2 5 ° C ) CHARACTERISTIC SYMBOL TEST CONDITION Quiescent Current ICCQ VIN=0 - 19 45 Pout(1) THD=10% 2.0 2.5 - Pout(2) THD=10%,Vcc=12V - 4.6 - THD Pout=1W/CH - 0.25 1.0 Gv(1) R f = 8 2 Ω , Vo u t = 0 d B m 43 45 47 Gv(2) R f = 0 , Vo u t = 0 d B m - 56 - Input Resistance RIN - 30 - kΩ O u t p u t N o i s e Vo l t a g e VNO - 0.3 1.0 m Vr m s Ripple Rejection Ratio R.R - 54 - dB C r o s s Ta l k C.T - 45 - dB I n p u t O ff s e t Vo l t a g e V6,V7 Rg=10kΩ, BW=20Hz~20kHZ Rg=600Ω, V R I P = 0 . 2 Vr m s fRIP=100Hz Rg=600Ω.Amp1↔2 Vo u t = 0 d B m , f = 1 k H z - - 20 60 mV 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 M I N . T Y P. M A X . U N I T mA W % dB D6282 TEST CIRCUIT & BLOCK DIAGRAM Vcc1 12 Vcc C10 2200uF Vcc2 3 47uF IN - 2 C2 47uF 4 220uF *C IN 7 82 IN2 NF2 Rf2 8 2 30 Ripple C3 - C6 20K OUT - 1 C8 BIAS CIRCUIT THERMAL SHUT DOWN PROTECTION CIRCUIT + - ch - 2 10 C5 30 11 20K 9 C9 1000uF B.S.2 C7 RL 82 C1 NF1 1000uF 0.15uF 5 0.15uF Rf1 ch - 1 C4 100uF IN - 1 + 6 RL IN1 *C IN 100uF B.S.1 1 OUT - 2 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). APPLICATION INFORMATION AND APPLICATION METHOD 1. ADJUSTMENT OF VOLTAGE GAIN The voltage gain Gv is obtained as follows by R1,R2 and Rf in Fig.1. INPUT Gv=20log((Rf+R1+R2)/(Rf+R1)) When Rf=82Ω G v = 4 5 d B ( Ty p . ) 47uF G v = 5 6 d B ( Ty p . ) CNF When Rf=0 Rf 6/7 5/8 R1 30 + AMP R2 20K 2/10 OUTPUT 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 Fig 1. increase is liable to produce oscillation , it is recommended to use this at 40dB or o v e r. D6282 2. THERMAL SHUT-DOWN CIRCUIT The thermal shut-down circuit is built in for the purpose of preventing the destruction of IC due to the abnormal temperature rise when the heat radiation is insufficient . The operation temperature is set at radiation Fin temperature 1 7 5 ° C ( Ty p . ) At this temperature or over the bias is interrupted to prevent the destruction of IC. 3. INPUT STAGE The input circuit of this IC is as shown in Fig.2.PNP TR: Q1 is provided in the OUTPUT input circuit so as to make its usage. Possible c a p a c i t o r. without the However , input at pins Q2 Q3 coupling and ⑥ INPUT Q1 6/7 CIN 9 to BIAS Pre - GND noise is recommended. For cutting the volume the slide input capacitor: noise, CIN to DRIVER 30 30 ⑦ , m a x 6 0 m V o ff s e t v o l t a g e i s p r o d u c e d . Application after checking volume slide 2/10 20K 5/8 Rf Insert in series 47uF to interrupt the DC component 4. OSCILATION PREVENTIVE MEASURES Fig.2 For oscillation preventive capacitor C6 and C7 between the output terminal and GND ,it is recommended to use Polyester film capacitor having good 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 produced ,Apply the capacitor after checking enough for its capacity ,type and mounting position. D6282 As the oscillation allowance varies according to the printed pattern layout, the standard printed board is recommended to be referred to design it 5. INPUT VOLTAGE 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 Ω , f = 1 k H z : E n o u g h care must be taken for this phenomenon. 6. POWER ON/OFF SWITCH T h e r e i s p o w e r O N / O F F s w i t c h a t p i n 3 . H o w e v e r, o u t p u t p o w e r i s c h a n g e d b y p i n 3 supply voltage when pin 3 voltage in not same pin 12 supply voltage, after referring to attached date, select pin 3 supply voltage. 7. GND LINE GND pin is not separated for Pre-GND and for Pw-GND. That is liable to cause distortion and cross talk worse. Before use this IC, please check it. CHARACTERISTICS CURVES D6282 D6282