UNISONIC TECHNOLOGIES CO., LTD A6283 LINEAR INTEGRATED CIRCUIT 4.6W DUAL AUDIO POWER AMPLIFIER DESCRIPTION UTC A6283 is an audio power IC with built-in two channels developed for portable radio cassette tape recorder. Because of the parts reduction and sip (Single In line Package), space merit is remarkable. Thermal shut down protection circuit is built in. FSIP-12H FEATURES * High Power * POUT = 2.5W/CH (Typ.) : (VCC = 9V, RL = 4Ω, f = 1kHz, THD = 10%) POUT = 4.6W/CH (Typ.) : (VCC = 12V, RL = 4Ω, f = 1kHz, THD = 10%) * Low popping noise at power ON * Small Quiescent Current : IQ = 19mA (Typ.), (VCC = 9V, VIN = 0) * Soft Clip * Built-in thermal shut down protection circuit * Best for supply voltage 9V, 12V * Operation supply voltage range: VCC = 6~15V *Pb-free plating product number: A6283L ORDERING INFORMATION Order Number Normal Lead Free Plating A6283-F12-T A6283L-F12-T Package Packing FSIP-12H Tube A6283L-F12-T (1)Packing Type (2)Package Type (1) T: Tube (2) F12: FSIP-12H (3)Lead Plating (3) L: Lead Free Plating, Blank: Pb/Sn www.unisonic.com.tw Copyright © 2005 Unisonic Technologies Co., Ltd 1 of 7 QW-R107-047,A A6283 LINEAR INTEGRATED CIRCUIT PIN DESCRIPTION (TOP VIEW) 12 11 10 9 8 7 6 5 4 3 2 1 VCC B.S.2 OUT-2 Power-GND NF2 IN-2 Pre-GND IN-1 NF1 RIPPLE OUT-1 B.S.1 FSIP-12H UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 7 QW-R107-047,A A6283 LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS (Ta = 25℃) PARAMETER SYMBOL RATINGS UNIT Supply Voltage VCC 20 V Output Current (Peak/CH) IO(PEAK) 2.5 A Power Dissipation PD 12.5 W Junction Temperature TJ +125 °C Operating Temperature TOPR -20~ +75 °C Storage Temperature TSTG -55~+150 °C Note Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. TYPICAL DC VOLTAGE OF EACH TERMINAL (VCC = 9V, Ta = 25℃) TERMINAL NO. DC VOTAGE (V) 1 8.2 2 4.5 3 8.9 4 0.6 5 0.01 6 GND 7 0.01 8 0.6 9 GND 10 4.5 11 8.2 12 VCC TYP 20 20 2.5 4.6 45 56 0.3 30 MAX UNIT 45 mA 60 mV ELECTRICAL CHARACTERISTICS (Ta = 25℃, VCC= 6V, RG = 600Ω, RL = 10kΩ, f = 1kHz, unless otherwise specified.) PARAMETER SYMBOL TEST CONDITIONS Quiescent Current IQ VIN = 0 Input Offset Voltage V5, V7 POUT(1) THD = 10% Output Power POUT(2) THD = 10%, VCC = 12V GV(1) RF = 82Ω, VOUT = 0dBm Voltage Gain GV(2) RF = 0, VOUT = 0dBm Output Noise Voltage eN RG = 10kΩ, BW = 20Hz~20kHz Input Resistance RIN RG = 600Ω, VRIP =0.2VRMS Ripple Rejection Ratio RR fRIP = 100Hz, Cross Talk C.T Total Harmonic Distortion THD RG = 600Ω, Amp1 2 VOUT = 0dBm, fRIP = 1kHz, POUT = 1W/CH UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN 2.0 43 W 47 1.0 dB mVRMS kΩ 50 dB 60 dB 0.2 1.0 % 3 of 7 QW-R107-047,A A6283 LINEAR INTEGRATED CIRCUIT TEST CIRCUIT & BLOCK DIAGRAM VCC + C10 2200µF VCC B.S.1 + OUT1 + NF1 ch - 1 30O - C6 0.15µF Ripple IN - 2 * CIN + IN2 + ch - 2 30O C5 OUT2 100µF - B.S.2 RF2 82O OUT - 1 RL 100µF C9 1000µF OUT - 2 RL C7 0.15µF 20kO Pre - GND + + + - NF2 C2 47µF Bias Circuit Thermal Shut Down Protection Circuit + C3 220µF C8 1000µF 20kO RF1 82O + C1 47µF C4 100µF + IN1 + IN - 1 * CIN + Power - GND * This IC can be used without coupling capacitor (CIN). If volume slide noise occurred dy input offset voltage is undesirable, it needs to use the capacitor (CIN). UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 7 QW-R107-047,A A6283 LINEAR INTEGRATED CIRCUIT 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. GV = 20 log RF+R1+R2 RF+R1 GV = 56dB (Typ.) When RF = 0 When RF = 82Ω GV = 45dB (Typ.) By increasing RF, reduction of GV is possible, However, since the feedback increase is liable to produce oscillation, it is recommended to use this at 40dB or over. 5/7 INPUT RF + 4/8 R1 30Ω + AMP - 2/10 OUTPUT R2 20kΩ Fig.1. 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. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 7 QW-R107-047,A A6283 LINEAR INTEGRATED CIRCUIT APPLICATION INFORMATION AND APPLICATION METHOD (Cont.) 3. INPUT STAGE 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 capacitor. However, at pins ⑤ and ⑦, max 60mV offset voltage is produced. Application after checking volume slide noise is recommended. For cutting the volume slide noise, inset the input capacitor: CIN in series to interrupt the DC component. OUTPUT Q2 20kΩ Q3 2/10 to DRIVER INPUT + Q1 5/7 CIN 30Ω 30kΩ 6 to BIAS Pre-GND 4/8 + RF 47μF Fig.2. 4. OSCILLATION PERVENTIVE MEASURES For oscillation preventive capacitor C6 and C7 between the output terminal and GND, it is recommended to use polyester film capacitor having good characteristics for temperature and for high frequency. 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. 5. INPUT VOLTAGE When the excessive signal is input, turning-up is produced in the clip waveform. The turning-up point is VIN = 300mVRMS (Typ.): VCC = 9V, RL = 4Ω, f = 1kHz : Enough care must be taken for this phenomenon. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 7 QW-R107-047,A A6283 LINEAR INTEGRATED CIRCUIT TYPICAL CHARACTERISTICS POUT - VCC PD(MAX) - VCC Maxmum Power Dissipation, PD(MAX) (W) Output Power, POUT (W) 10 f = 1kHz THD = 10% 8 RL = 3Ω 6 RL = 2Ω 4 RL = 4Ω 2 0 0 4 6 12 16 20 12 f = 1kHz THD = 10% 10 RL = 3Ω 8 RL = 2Ω 6 4 RL = 4Ω 2 0 24 0 2 4 Supply Voltage, VCC (V) 6 PD - POUT Power Dissipation, PD (W) Power Dissipation, PD (W) RL = 4Ω f = 1kHz VCC = 12V 3 VCC = 9V 1 12 14 16 PD - POUT 5 2 10 Supply Voltage, VCC (V) 5 4 8 VCC = 6V 0 RL = 2Ω VCC = 9V f = 1kHz 4 RL = 3Ω 3 RL = 4Ω 2 1 0 0 1 2 3 4 5 6 Output Power, POUT (W) 0 1 2 3 4 5 6 Output Power, POUT (W) UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 7 of 7 QW-R107-047,A