UTC-IC A6283

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