AN7148 [PANASONIC]
Dual 2.1W Audio Power Amplifier Circuit; 双2.1W音频功率放大电路
| 型号： | AN7148 |
| 厂家： | 
PANASONIC |
| 描述： | Dual 2.1W Audio Power Amplifier Circuit |
| 文件： | 总4页 (文件大小：51K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
ICs for Audio Common Use
AN7148
Dual 2.1W Audio Power Amplifier Circuit
■ Overview
Unit : mm
The AN7148 is an integrated circuit designed for power
amplifier of 2.1W (9V, 4Ω) output. Stereo operation is
enabled due to incorporating two amplifiers on one chip.
It is most suitably used for battery operated set such as
radio cassette recorder because quiescent circuit current
is small comparing to current power amplifier. Low distor-
tion and low noise are realized and external components
are very few. 12-pin SIL package has realized compact
and high density mounting of a set.
5.9±0.25 7.7±0.3 7.8±0.25
ø 3.6
12
■ Features
1
•
•
•
•
•
•
•
Low quiescent current
High operation stability
Low radiation
Low distortion
Low noise
12-Lead SIP Package with Fin (HSIP012-P-0000A)
Low shock noise from power ON/OFF operation
Fewer external components
■ Pin Descriptions
Pin No.
Pin Name
N.F.B Ch.1
Pin No.
Pin Name
Output Ch.2
1
2
3
4
5
6
7
8
9
Input Ch.1
Ripple Filter
GND (Input)
Input Ch.2
N.F.B Ch.2
Bootstrap Ch.2
GND (Output)
10 VCC
11 Bootstrap Ch.1
12 Output Ch.1
■ Block Diagram
1
11
Input
Circuit
Driver
Circuit
Output
Circuit
2
3
5
12
Ch.1
Ch.2
Over Temperature
Protection
10 VCC
Input
Circuit
Driver
Circuit
Output
Circuit
7
6
4
9
8
GND (Input) GND (Output)
ICs for Audio Common Use
AN7148
■ Absolute Maximum Ratings (Ta= 25˚C)
Parameter
Symbol
Rating
Unit
V
Supply Voltage
Supply Current
VCC
ICC
24
3.5
A
*
Power Dissipation
PD
41.7
W
˚C
˚C
– 30 ~ + 75
– 55 ~ + 150
Operating Ambient Temperature
Storage Temperature
R θ j – c = 3˚C/W
Topr
Tstg
*
■ Electrical Characteristics (Ta = 25˚C)
Parameter
Symbol
Condition
min.
typ.
13
max.
19
Unit
mA
Quiescent Circuit Current
ICQ
VCC = 9V, RL = 4Ω, Vin = 0mV
VCC = 9V, RL = 4Ω, Vin = 0mV,
Rg = 10kΩ
*
Output Noise Voltage
Vno
0.25
44.5
0.20
2.10
0
0.50
46.5
0.75
mV
dB
%
V
CC = 9V, RL = 4Ω, Vin = 3mV,
Voltage Gain (Gain)
GV
42.5
1.75
f= 1kHz
V
CC = 9V, RL = 4Ω, Vin = 3mV,
f= 1kHz
CC = 9V, RL = 4Ω,
THD= 10%, f= 1kHz
CC = 9V, RL = 4Ω, Vin = 3mV,
f= 1kHz
CC = 9V, RL = 8Ω,
THD= 10%, f= 1kHz
CC = 9V, RL = 3Ω,
THD= 10%, f= 1kHz
Total Harmonic Distortion
Maximum Output Power (4Ω)
Channel Balance
THD
PO (max.)
CB
V
W
V
1
dB
W
V
Maximum Output Power (8Ω)
Maximum Output Power (3Ω)
PO (max.) 8
PO (max.) 3
1.25
2.6
V
W
Note) Operating Supply Voltage Range : VCC (opr.) = 6 ~ 18V
*
Filter with band width of 15Hz ~ 30kHz (12dB/oct) should be used for Vno measurement.
PD – Ta
50
45
40
35
30
25
20
15
10
5
(1) Tc = Ta (θ
= 3˚C/W)
j– c
(2) With a 100cm2 × 3mm Al
heat sink (black color coated)
or a 200cm2 × 2mm Al heat
sink (not lacquered)
41.7W
(1)
(3) With a 100cm2 × 2mm Al
heat sink (not lacquered)
(4) Without heat sink
17.9W
13.9W
(2)
(3)
3.0W
(4)
0
150
0
25
50
75
100 125
Ambient Temperature Ta (˚C)
ICs for Audio Common Use
AN7148
GV, ICQ, THD – VCC
PO, THD – Vin
GV, THD – f
46
10
100
10
VCC = 9V
L = 4Ω
f = 1kHz
GV
R
45
44
43
42
41
45
GV
f = 1kHz
R
L = 4Ω
1
44
0.1
THD
1
1.0
0.8
0.6
0.4
0.2
0
0.8
0.6
0.4
0.2
0
15
10
5
ICQ
PO
0.01
0.1
0.01
THD
VCC = 9V
L = 4Ω
in = 3mV
THD
R
V
0.001
0
0
4
8
12
16
20
24
0.1
1
10
100
10
100
1k
10k
100k
Supply Voltage VCC (V)
Input Voltage Vin (mV)
Frequency f (Hz)
PO – VCC
Vno – Rg
20
18
16
14
12
10
8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
VCC = 9V
L = 4Ω
THD = 10%
f = 1kHz
R
R
L = 3Ω
FLAT
6
RL = 4Ω
4
DIN/Audio
2
0
0
4
8
12
16
20
24
0.1k
1k
10k
100k
1000k
Supply Voltage VCC (V)
Input Resistance Rg (Ω)
■ Application Circuit
VCC
1000µF
+
–
–
1000µF
+
3
10
0.1µF
11
12
7
+
1
2
+
2.2Ω
1000µF
100µF
–
–
47µF
47µF
–
+
Input Ch.1
Input Ch.2
AN7148
–
+
5
6
1000µF
0.1µF
–
+
8
+
100µF
4
9
–
2.2Ω
ICs for Audio Common Use
AN7148
■ Printed Circuit Board Layout
AN7148
Output2
Output1
–
1000µF
+
–
+
Input2
GND
1000µF
0.1µF
+
–
100µF
–
+
VCC
–
+
100µF
+
–
100µF
+
–
– +
47µF
1000µF
47µF
Input1
1
12
GND
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