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ICs for Audio Common Use
AN5273
4.0 W × 2 (18 V, 8 Ω) Power Amplifier with
Mute Function and Volume Control
■ Overview
The AN5273 is a monolithic integrated circuit designed
for 4.0 W (18 V, 8 Ω) output audio power amplifier. It is
a dual channel SEPP IC suitable for stereo operation in
TV application.
■ Features
• Built-in DC volume control
• Built-in mute circuit
• Built-in thermal protection circuit
• Built-in over current protection circuit
• V
operating range : 12.2 V to 27.5 V
CC
Unit : mm
7.7±0.3
φ3.6
(10.0)(10.0)
20.0±0.3
28.0±0.3
29.75±0.30
R1.8
0.6
(12.5)
1.2±0.1
19.1±0.3
21.9±0.3
(1.2)
121
(1.27) (1.3)
(1.27)
+0.15
–0.05
0.6
2.54
+0.10
–0.05
0.25
29.6±0.3
1.45±0.151.80±0.15
3.5±0.3
■ Applications
• TV
■ Block Diagram
1
Mute
HSIP012-P-0000A
Volume
Over
current
thermal
8
NF2
protection
circuit
9
10
GND
12
11
CC
V
NF1
Out1
Ripple
filter
2
3
4
5
6
7
In1
Vol.
N.C.
In2
RF
Out2
1
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AN5273 ICs for Audio Common Use
■ Pin Descriptions
Pin No. Description
1 Mute control
2 Ch.1 input
3 Volume control
4N.C.
5 Ch.2 input
6 Ripple filter
■ Absolute Maximum Ratings
Parameter Symbol Rating Unit
Supply voltage V
Supply current I
2
Power dissipation
Operating ambient temperature
Storage temperature
Note) *1:Ta = 25 °C except power dissipation, operating ambient temperature and storage temperature.
*2: Power dissipation of the package at Ta = 75 °C.
*
1
*
1
*
CC
CC
P
D
T
opr
T
stg
Pin No. Description
7 Ch.2 output
8 Negative feedback ch.2
9 GND
10 V
CC
11 Negative feedback ch.1
12 Ch.1 output
30 V
3.5 A
37.5 W
−25 to +75 °C
−55 to +150 °C
■ Recommended Operating Range
Parameter Symbol Range Unit
Supply voltage V
CC
12.2 to 27.5 V
■ Electrical Characteristics at VCC = 18 V, f = 1 kHz, RL = 8 Ω, Ta = 25 °C
Parameter Symbol Conditions Min Typ Max Unit
Quiescent current I
Voltage gain G
1
Total harmonic distortion
1
Output power
*
*
THD VIN = 90 mV 0.3 1.0 %
Channel balance CB VIN = 90 mV −10 1dB
1
Max. volume attenuation
Mute attenuation
Output noise voltage
Note) *1: With a filter band from 20 Hz to 20 kHz used.
*
1
*
1
*
M
V
2
No input signal 17 25 33 mA
CQ
VIN = 90 mV 28 30 32 dB
V
P
THD = 10 % 3.6 4.1 W
O
Att VIN = 90 mV −70 −64 dB
VIN = 90 mV −70 −64 dB
Att
Rg = 10 kΩ, Din-Audio Filter 0.6 1.0 mV[rms]
NO
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ICs for Audio Common Use AN5273
■ Application Circuit Example
AN5273
GND 9
1000 µF
18 V
10
V
CC
100 kΩ
Audio
mute
5 V
Mute 1
3.3 µF
In1 2
1 µF
4
100 µF
1000 µF
R
= 8 Ω
L
RF 6
Out2 7
NF2 8
20 kΩ
0.047
µF
20 Ω
1 kΩ
Vol. 3
5 V
N.C.
1 µF
In2 5
10 kΩ
■ Usage Notes
1) Depending on the maximum application output power, external heatsink may be needed.
External heatsink should be fixed to the chassis.
2) Fin of the IC can be connected to GND.
3) Please prevent output to V
4) The temperature protection circuit will operate at T
protection circuit would automatically be deactivated and resume normal operation.
short and output to GND short.
CC
around 150 °C. However, if the temperature decreases, the
j
10 µF
1 kΩ
NF1 11
20 kΩ
0.047
µF
20 Ω
Out1 12
1000 µF10 µF
R
= 8 Ω
L
3