ICs for Audio Common Use

AN7147N
Dual 5.3W Audio Power Amplifier Circuit

■ Overview Unit : mm
The AN7147N is an integrated circuit designed for
power amplifier of 5.3W (12.0V, 3Ω) output. Stereo oper- 5.9±0.25 7.7±0.3 7.8±0.25
ø 3.6
ation is enabled due to incorporating two amps. on one
chip. It makes high reliability by smaller quiescent current 12

compared with power amp. current and protectors built in.

As quiescent circuit current is very small, it is most suit-
ably used for battery operated set such as radio cassette

29.96±0.3
28.0±0.3
20.0±0.2

0.6±0.1

29.6±0.3
recorder. Furthermore, low distortion and low noise are
realized and external components are very few. 12-pin

R1.8

0.6
SIL package enabled compact and high integrated set.

0.35 – 0.05 2.54

■ Features 1

+ 0.1
• Low quiescent current
• High operation stability

3.5±0.3
1.2±0.1
• 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 componetns

■ Pin Descriptions
Pin No. Pin Name Pin No. Pin Name
1 N.F.B Ch.1 7 Output Ch.2
2 Input Ch.1 8 Bootstrap Ch.2
3 Ripple Filter 9 GND (Output)
4 GND (Input) 10 VCC
5 Input Ch.2 11 Bootstrap Ch.1
6 N.F.B Ch.2 12 Output Ch.1

■ Block Diagram

1 11

Input Driver Output

2 12
Circuit Circuit Circuit

Over Current
3 Over Temperature 10 VCC
Protection

Input Driver Output

5 7
Circuit Circuit Circuit

6 4 9 8
GND (Input) GND (Output)
AN7147N ICs for Audio Common Use

■ Absolute Maximum Ratings (Ta= 25˚C)

Parameter Symbol Rating Unit
Supply Voltage VCC 24 V
Supply Current ICC 4 A
Power Dissipation * PD 41.7 W
Operating Ambient Temperature Topr – 30 ~ + 75 ˚C
Storage Temperature Tstg – 55 ~ + 150 ˚C
* Rθj – c = 3˚C/W

■ Electrical Characteristics (VCC = 12V, RC = 3Ω, f = 1kHz, Ta = 25˚C)

Parameter Symbol Condition min. typ. max. Unit
Quiescent Circuit Current ICQ Vi = 0mV 13 19 mA
Voltage Gain GV PO = 1.0W 42.5 44.5 46.5 dB
PO = 1.0W, f = 1kHz 0.2 0.75
Total Harmonic Distortion THD PO = 1.0W, f = 100Hz 0.4 %
PO = 1.0W, f = 10kHz 0.3
THD = 10%, RL = 3Ω 4.7 5.3
Maximum Output Power PO THD = 10%, RL = 4Ω 4.3 W
THD = 10%, VCC = 9V, RL = 3Ω 2.9
Rg = 10kΩ, f = 15Hz ~ 30kHz, 0.25
Output Noise Voltage Vno 12dB/OCT mV
Rg = 10kΩ, Without Filter 0.40 0.5
Channel Balance CB PO = 0.5W 0 1 dB
Channel Separation CS PO = 0.5W 40 50 dB
Ripple Rejection Ratio RR PO = 0.5W 45 50 dB
Output Offset Voltage VO (offset) Vi = 0 0 200 mV
Note) Operating Supply Voltage Range : 5V to 22V

PD – Ta
50
(1) Tc= Ta (θj – c = 3˚C/W)
(2) With a 100cm2 × 3mm Al
heat sink (black color coated)
40 or a 200cm2 × 2mm Al heat
(1) sink (not lacquered)
Power Dissipation PD (W)

(3) With a 100cm2 × 2mm Al

heat sink (not lacquered)
30 (4) Without heat sink

20
(2)

10 (3)

(4)

0
0 40 80 120 160
Ambient Temperature Ta (˚C)
ICs for Audio Common Use AN7147N

PO – VCC PO, THD – Vi THD, GV – f

Output Power PO (W), Total Harmonic Distortion THD (%)

24 100 46

Total Harmonic Distortion THD (%) Voltage Gain GV (dB)

THD = 10% VCC = 12V
RL = 3Ω 45
30 f = 1kHz GV
20
44
10
43
Output Power PO (W)

16 RL = 4Ω THD
3
42
f = 10kHz
Ω

f = 100Hz
=3

12 1
RL

VCC = 12V
8Ω f = 1kHz 2.0 RL = 3Ω
= 0.3
8 R L PO = 1.0W

Hz
1.5

100

z
0.1

10H
f=
1.0

f=
4
0.03 PO THD
0.5
f = 1kHz
0 0.01 0
0 4 8 12 16 20 24 0.1 0.3 1 3 10 30 100 10 100 1k 10k 100k
Supply Voltage VCC (V) Input Voltage Vi (mV) Frequency f (Hz)

GV, ICQ, THD – VCC ICC – VCC THD – PO

46 1000 10
Quiescent Circuit Current ICQ (mA) Voltage Gain GV (dB)

VCC = 12.0V
45 RL = 3Ω
GV Rg = 600Ω
2Ω

Total Harmonic Distortion THD (%)

44 800
4Ω
Ω
RL =

=3

f = 1kHz
RL
Supply Current ICC (mA)

RL

43
RL = 3Ω 1
Total Harmonic Distortion THD (%)

600 100Hz
1.0 0.3 10kHz
f = 1kHz
20 0.8 400 Rg = 600Ω 1kHz
THD = 10%
ICQ 0.1
15 0.6

10 0.4 200
THD 0.03
5 0.2

0 0 0.01
0 4 8 12 16 20 24 4 8 12 16 20 24 0.1 0.3 0.5 1 3 5 10
Supply Voltage VCC (V) Supply Voltage VCC (V) Output Power PO (W)

PC – PO PO – f Vno – Rg
4.0 8 2.0
RL = 3Ω VCC = 12V VCC = 12V
f = 1kHz RL = 3Ω 1.8 RL = 3Ω
Single channel operation
THD = 10% 1.6
Output Noise Voltage Vno (W)

3.0 6
Power Consumption PC (W)

V 1.4
12 THD = 5%
Output Power PO (W)

C
=
VC 1.2

2.0 4 1.0
V
=9
V CC 0.8

0.6
1.0 2
0.4
FLAT
0.2
DIN AUDIO
0 0 0
0.1 0.3 0.5 1 3 5 10 10 100 1k 10k 10 100 1k 10k 100k
Output Power PO (W) Frequency f (Hz) Source Resistance Rg (Ω)
AN7147N ICs for Audio Common Use

■ Application Circuit

VCC
– +
100µF 1000µF
+ –

3 10
0.1µF
1 11
+ + 2.2Ω
100µF
–
47µF –
1000µF
Ch.1
Input 2 12
+ –
AN7147N
+ –
Ch.2
5 7
Input
47µF – 1000µF
+

6 8 0.1µF
+
100µF 4 9
–
2.2Ω

■ Printed Circuit Board Layout

Scale : 1/1

AN7147N
Output2
– 1000µF
+

Input2 – Output1
+ 1000µF
0.1

0.1µF
µF
2.2Ω

+
– 100µF
GND
– 2.2
– 100µF Ω + – VCC
100µF +
+ +
– + 47µF 1000µF
Input1 47µF –
1 12 GND