PANASONIC AN7125

ICs for Audio Common Use
AN7125
Dual Channel BTL Power Amplifier
■ Overview
Unit : mm
AN7125 is a monolithic integrated circuit designed for
13.5 W (12 V,4 Ω) output audio power amplifier.It is a
dual channel BTL IC suitable for stereo operation in radio
cassette and TV application.
(10.0)
29.6±0.3
(1.27)
+0.15
0.6 –0.05 (1.27)
R1.8
3.5±0.3
1.45±0.15
1
(1.2)
19.1±0.3
21.9±0.3
1.80±0.15
1.2±0.1
(12.5)
+0.10
0.25 –0.05 2.54
0.6
• Built-in muting pin
• Built-in stand by pin
• Built-in thermal shutdown protection circuit
• Built-in current limiting circuit
• High power : (13.5 W/12 V/4 Ω)
(13.0 W/15 V/8 Ω)
• Few external components
• Operating voltage range 6 V ∼ 18 V (12 V typ.)
20.0±0.3
■ Features
φ3.6
(10.0)
29.75±0.30
28.0±0.3
(1.3)
12
7.7±0.3
HSIP012-P-0000A
■ Applications
• Radio-cassette
■ Block Diagram
REF
TSD
protection
circuit
12
10
9
8
11
GND
GND
7
Mute
6
5
4
2
3
GND
VCC
1
Standby
circuit
1
AN7125
ICs for Audio Common Use
■ Pin Descriptions
Pin No.
Description
Pin No.
Description
1
VCC
7
Pre GND
2
ch.1 + ve Phase Output
8
ch.2 Input
3
ch.1 Output GND
9
Mute
4
ch.1−ve Phase Output
10
ch.2 −ve Phase Output
5
Standby
11
ch.2 Output GND
6
ch.1 Input
12
ch.2 +ve Phase Output
■ Absolute Maximum Ratings
Parameter
Symbol
Ratings
Unit
VCC
24
V
ICC
6.0
A
PD
38.5
W
Operating ambient temperature
Topr
−25 to +75
°C
Storage temperature
Tstg
−55 to +150
°C
Symbol
Range
Unit
VCC
6.0 to 18.0
V
Supply voltage
*1
Supply current
Power dissipation
*2
Note) *1 : Without input signal,VCC is up to 24 V
*2 : Ta = 75 °C.
■ Recommended Operating Range
Parameter
Supply voltage
■ Electrical Caracteristics at VCC = 12 V, RL = 4 Ω, freq. = 1 kHz, 2 channel outputs, Ta = 25 °C
Parameter
Symbol
Conditions
Typ
Max
Unit
ICQ
VIN = 0 mV

100
210
mA
VNO
VIN = 0 mV,RG = 6.2 kΩ

0.27
0.5
mVrms
GVC
VIN = 20 mV
38
40
42
dB
THD
VIN = 20 mV

0.07
0.4
%
Maximum output power
PO
THD = 10 %
10
12

W
Channel balance
CB
VIN = 20 mV
−1
0
1
dB
CT
VIN = 20 mV,RG = 6.2 kΩ
55
70

dB
−350
0
350
mV
Quiescent circuit current
Output noise voltage
*1
Voltage gain
Total harmonic distortion
Channel crosstalk
*2
Output offset voltage
Ripple rejection
*1
Standby current
Muting effects
*2
*2
VOFF
RG = 6.2 kΩ
RR
VR = 1 Vrms,fR = 120 Hz,RG = 6.2 kΩ
50
60

dB
ISTB
VIN = 0 mV

1
10
µA
MT
VIN = 20 mV
70
80

dB
Note) *1 : With a filter band 20 Hz to 20 kHz(12 dB/OCT)used.
*2 : With a filter band 400 Hz to 30 kHz used.
2
Min
ICs for Audio Common Use
AN7125
■ Terminal Equivalent Circuit
Pin No.
Equivalent Circuit
1

Function
2
1
Status
VCC :
VCC input
typ. : 12 V
ch.1 O/P :
VCC/2
ch.1 positive phase output pin.
ドライバ回路
プリアンプ
Pin2
4
3
600 Ω
0V
ch.1 output power ground pin.
ドライバ回路
4
ch.1 Power GND :
3
30 kΩ
ch.1 O/P :
VCC/2
ch.1 inverse phase output pin.
VCC/2
5
Standby :
1
5
VTH = 2.8 V
This is the standby control pin.
STB off > 3.5 V
30 kΩ
100 Ω 100 Ω
STB on = 0 V/GND
5 kΩ
5 kΩ
10 kΩ 2 kΩ
2 kΩ
8
6
ch.1 Input :
200 Ω
400 Ω
0V
This is the amplifier input pin.
Pin6,8
30 kΩ
7
7

Pre GND :
Input ground pin.
0V
3
AN7125
ICs for Audio Common Use
■ Terminal Equivalent Circuit(continued)
Pin No.
Equivalent Circuit
Function
8
ch.2 Input :
200 Ω
400 Ω
Status
0V
This is the amplifier input pin.
Pin6,8
30 kΩ
7
9
Mute :
VTH = 1.5 V
Mute input pin.
Mute on > 2.5 V
3.2 kΩ
Mute off = 0 V
3.6 kΩ
9
7
20 kΩ
10
ch.2 Output :
1
VCC/2
ch.2 inverse phase output pin
プリアンプ
ドライバ回路
Pin10
12
11
ドライバ回路
12
600 Ω
30 kΩ
ch.2 Power GND :
11
ch.2 Output :
ch.2 positive phase output pin
VCC/2
4
0V
ch.2 output power ground
VCC/2
ICs for Audio Common Use
AN7125
VCC
2200 µF
2
4
51 kΩ
5V
STB
Cs
Cs
0.22 µF
2.2 Ω
RL
4Ω
OUT1
0.22 µF
2.2 Ω
5
10 µF
8.2 kΩ
MUTE
OUT1
Output1
3 GND
6
IN1
VCC
12 V
1
Input
7 GND
■ Application Circuit Example
9
33 µF
IN2
8
10
OUT2
11
Output2
GND
12
OUT2
0.22 µF
2.2 Ω
RL
4Ω
0.22 µF
2.2 Ω
STB 'Off'
5V
STB 'On'
0V
Mute 'Off'
0V
Mute 'On'
5V
■ Application’s Precautions
1. External heatsink is needed when used. External heatsink should be fixed to the chassis.
2. Fin of the IC can be connected to GND.
3. Please prevent output to VCC short and output to GND short.
4. The temperature protection circuit will operate at Tj around 150 °C.
However, if temperature decrease, the protection circuit will automatically be decreased and resume
normal operation.
5
AN7125
ICs for Audio Common Use
■ Technical Information
• HSIP012-P-0000A
PD  Ta
80
Power dissipation PD (W)
70
62.5 W
60
50
(1)
40
30
20.8 W
20
(2)
15.6 W
(3)
10
3.0 W
(4)
0
0
25
50
75
100
125
150
Ambient temperature Ta (°C)
1. TC = Ta,62.5 W (θj-c = 2 °C/W)
2. 20.83 W (θf = 4.0 °C/W)
With a 100 cm2 X 3 mm Al heat sink (black
colour coated) or a 200 cm2 X 2 mm Al
heat sink (not lacquered)
3. 15.63 W (θf = 6.0 °C/W)
With a 100 cm2 X 2 mm Al heat sink (not
lacquered)
4. 3.0 W at Ta = 25 °C(θj-a = 42 °C/W)
Without heat sink
• Area of safe operation
VCEmax = 30 V
ICmax = 8 A
10
t = 0.2 ms
IC (A)
5
t = 1.0 ms
2
t = 10 ms
1
0.5
0.2
0.1
1
2
5
10
VCE (V)
6
20
50
100