ICs for Audio Common Use
■Overview
The AN7149N is an integrated circuit designed for
power amplifier of 5.3W (12.0V, 3Ω) output. Stereo oper-
ation is enabled due to incorporating two amps. on one
chip. It makes high reliability by smaller quiescent current
compared with power amp. current and protectors built in.
As quiescent circuit current is very few, it is most suitably
used for battery operated set such as radio cassette
recorder. Furthermore, low distortion and low noise are
realized and external components are very few. 12-pin
SIL package enabled compact and high-densely mounted
set.
■Features
•
Low quiescent current
•
High operation stability
•
Low radiation
•
Low distortion
•
Low noise
•
Low shock noise from power ON/OFF operation
•
Fewer external components
AN7149N
Dual 5.3W Audio Power Amplifier Circuit
29.96±0.3
29.6±0.3
12
1
Unit : mm
28.0±0.3
20.0±0.2
5.9±0.25 7.7±0.3 7.8±0.25
1.2±0.1
2.54 0.6±0.1
3.5±0.3
0.35+ 0.1
– 0.05
ø 3.6
R1.8
0.6
12-Lead SIP Package with Fin (HSIP012-P-0000A)
■Block Diagram
Input
Circuit
Driver
Circuit
Output
Circuit
GND (Output)GND (Input)
2
3
Input
Circuit
Driver
Circuit
Output
Circuit
5
6 4 9 8
12
10
7
1 11
VCC
Over Current
Over Temperature
Protection
■ Pin Descriptions
Pin No.
Pin Name
1
2
3
4
5
6
N.F.B Ch.1
Input Ch.1
Ripple Filter
GND (Input)
Input Ch.2
N.F.B Ch.2
Pin No.
Pin Name
7
8
9
10
11
12
Output Ch.2
Bootstrap Ch.2
GND (Output)
VCC
Bootstrap Ch.1
Output Ch.1
ICs for Audio Common Use
AN7149N
■ Absolute Maximum Ratings (Ta= 25˚C)
VCC
ICC
PD
Topr
Tstg
Supply Voltage
Supply Current
Power Dissipation
Operating Ambient Temperature
Storage Temperature
V
A
W
˚C
˚C
Parameter Symbol Rating Unit
24
4
41.7
– 30 ~ + 75
– 55 ~ + 150
Vi = 0mV
PO = 1.0W
PO = 1.0W, f = 1kHz
THD = 10%, RL = 3Ω
THD = 10%, RL = 4Ω
Parameter Symbol Condition min. typ. max. Unit
■ Electrical Characteristics (VCC = 12V, RC = 3Ω, f = 1kHz, Ta = 25˚C)
Quiescent Circuit Current
Voltage Gain
Total Harmonic Distortion
ICQ
GV
THD
47.5
4.7
40
13
49.5
0.2
5.3
4.3
2.9
0.5
0
45
19
51.5
0.5
1.0
1.0
mA
dB
%
W
mV
dB
dB
Rg = 10kΩ, f = 15Hz ~ 30kHz,
12dB/OCT
PO = 0.5W
PO = 0.5W
Maximum Output Power
Output Noise Voltage
Channel Balance
Ripple Rejection Ratio
Vno
CB
RR
PO THD = 10%, VCC = 9V,
RL = 3Ω
PD – Ta
50
40
30
20
10
0
Ambient Temperature Ta (˚C)
Power Dissipation PD (W)
1200 40 80
(4)
160
(3)
(2)
(1)
(1) Tc = Ta (θj– c = 3˚C/W)
(2) With a 100cm2 × 3mm Al
heat sink (black color coated)
or a 200cm2 × 2mm Al heat
sink (not lacquered)
(3) With a 100cm2 × 2mm Al
heat sink (not lacquered)
(4) Without heat sink
ICs for Audio Common Use AN7149N
PO, THD – Vin
10
1
0.1
0.01
Input Voltage Vin (mV)
Output Power PO (W)
1000.1 1 10
10
1
0.1
PO – VCC
16
14
12
10
8
6
4
2
0
Supply Voltage VCC (V)
Maximum Output PO (W)
120 4 8 2016
Total Harmonic Distortion THD (%)
VCC = 12V
RL = 3Ω
GV, THD – f
50
49
48
47
46
45
44
Frequency f (Hz)
Voltage Gain GV (dB)
100k10 100 1k 10k
THD
VCC = 12V
RL = 3Ω
Vin = 3mV
GV
1.0
0.8
0.6
0.4
0.2
Total Harmonic Distortion THD (%)
RL = 4Ω
RL = 3Ω
RL = 2Ω
f = 10kHz
f = 1kHz
f = 100Hz THD
PO
f = 1kHz
Vno – Rg
Input Resistance Rg (Ω)
Output Noise Voltage Vno (mV)
100k10 100 1k 10k
1.0
0.8
0.6
0.4
0.2
0
DIN/AUDIO
VCC = 12V
RL = 3Ω
FLAT
RL = 6Ω
THD = 10%
f = 1kHz
0.1µF
3
110
2
5
6
11
12
7
8
4 9
AN7149N
–
+
100µF
Input Ch.1
–
+1000µF–
+1000µF
VCC
–
+
+–
47µF1000µF
2.2Ω
1000µF
47µF
2.2Ω
0.1µF
Input Ch.2
100µF–
+
–
+
+–
■Application Circuit
Printed Circuit Board Layout