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UNISONIC TECHNOLOGIES CO., LTD A6283
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.
LINEAR INTEGRATED CIRCUIT
FEATURES
* High Power * POUT = 2.5W/CH (Typ.) : (VCC = 9V, RL = 4, f = 1kHz, THD = 10%) POUT = 4.6W/CH (Typ.) : (VCC = 12V, RL = 4, 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
FSIP-12H
*Pb-free plating product number: A6283L
ORDERING INFORMATION
Order Number Normal Lead Free Plating A6283-F12-T A6283L-F12-T Package FSIP-12H Packing Tube
A6283L-F12-T (1)Packing Type (2)Package Type (3)Lead Plating (1) T: Tube (2) F12: FSIP-12H (3) L: Lead Free Plating, Blank: Pb/Sn
www.unisonic.com.tw Copyright (c) 2005 Unisonic Technologies Co., Ltd
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PIN DESCRIPTION (TOP VIEW)
LINEAR INTEGRATED CIRCUIT
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
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ABSOLUTE MAXIMUM RATINGS (Ta = 25)
LINEAR INTEGRATED CIRCUIT
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
ELECTRICAL CHARACTERISTICS
(Ta = 25, VCC= 6V, RG = 600, RL = 10k, 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 = 82, VOUT = 0dBm Voltage Gain GV(2) RF = 0, VOUT = 0dBm Output Noise Voltage eN RG = 10k, BW = 20Hz~20kHz Input Resistance RIN RG = 600, VRIP =0.2VRMS Ripple Rejection Ratio RR fRIP = 100Hz, Cross Talk Total Harmonic Distortion C.T THD RG = 600, Amp1 2 VOUT = 0dBm, fRIP = 1kHz, POUT = 1W/CH MIN TYP 20 20 2.5 4.6 45 56 0.3 30 50 60 0.2 1.0 MAX UNIT 45 mA 60 mV W 47 1.0 dB
mVRMS
2.0 43
k dB dB %
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TEST CIRCUIT & BLOCK DIAGRAM
LINEAR INTEGRATED CIRCUIT
VCC C10 2200F + VCC B.S.1 IN - 1 * CIN + IN1 + NF1 RF1 82O Ripple + C3 220F * CIN + 30O C1 47F + ch - 1 20kO C6 0.15F Bias Circuit Thermal Shut Down Protection Circuit OUT1 C4 100F +
C8 1000F
+ -
100F
NF2 C2 47F RF2 82O
30O -
ch - 2
B.S.2
+
C9 1000F C7 0.15F
20kO Pre - GND 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).
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+
IN - 2
IN2
+
C5 OUT2 100F
+ RL RL
OUT - 1
OUT - 2
+
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1. ADJUSTMENT OF VOLTAGE GAIN The voltage gain GV is obtained as follows by R1, R2 and RF in Fig.1.
LINEAR INTEGRATED CIRCUIT
APPLICATION INFORMATION AND APPLICATION METHOD
GV = 20 log
RF+R1+R2 RF+R1
GV = 56dB (Typ.) When RF = 0 When RF = 82 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
RF
INPUT
4/8
+
+ AMP R2 20k
2/10
R1 30
OUTPUT
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.
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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 and , 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 Q3 20k
2/10
to DRIVER INPUT + CIN 30k
5/7
Q1 30
6
Pre-GND
to BIAS
4/8
RF + 47F
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 = 4, f = 1kHz : Enough care must be taken for this phenomenon.
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TYPICAL CHARACTERISTICS
POUT - VCC
Maxmum Power Dissipation, PD(MAX) (W) 10 f = 1kHz THD = 10% RL = 3 12 10 8 6 4 2 0
LINEAR INTEGRATED CIRCUIT
PD(MAX) - VCC
f = 1kHz THD = 10% RL = 3 RL = 2
Output Power, POUT (W)
8
6 RL = 2 RL = 4 2
4
RL = 4
0 0 4 6 12 16 20 24 Supply Voltage, VCC (V)
0
2
4
6
8
10
12
14
16
Supply Voltage, VCC (V)
PD - POUT
5 VCC = 12V RL = 4 f = 1kHz Power Dissipation, PD (W) 5
PD - POUT
RL = 2 VCC = 9V f = 1kHz
Power Dissipation, PD (W)
4
4 RL = 3
3 VCC = 9V
3
2
2
RL = 4
1
VCC = 6V
1
0 0 1 2 3 4 5 6 Output Power, POUT (W)
0 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.
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www.unisonic.com.tw
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