ICs for Audio Common Use
AN7147N
Dual 5.3W Audio Power Amplifier Circuit
■ Overview
The AN7147N is an integrated circuit designed for power amplifier of 5.3W (12.0V, 3Ω ) output. Stereo operation 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 small, 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 integrated set.
■ Features
•Low quiescent current
•High operation stability
•Low radiation
•Low distortion
•Low noise
•Low shock noise from power ON/OFF operation
•Fewer external componetns
Unit : mm
5.9±0.25 7.7±0.3 7.8±0.25
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ø 3.6 |
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29.96±0.3 |
28.0±0.3 |
20.0±0.2 |
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R1.8 |
0.6 |
1.2±0.1
12 |
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0.6±0.1 |
29.6±0.3 |
2.54
1 |
0.05 |
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01. |
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+ – |
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0.35 |
0.3 |
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3.5± |
12-Lead SIP Package with Fin (HSIP012-P-0000A)
■ Pin Descriptions
Pin No. |
Pin Name |
Pin No. |
Pin Name |
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1 |
N.F.B Ch.1 |
7 |
Output Ch.2 |
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2 |
Input Ch.1 |
8 |
Bootstrap Ch.2 |
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3 |
Ripple Filter |
9 |
GND (Output) |
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4 |
GND (Input) |
10 |
VCC |
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5 |
Input Ch.2 |
11 |
Bootstrap Ch.1 |
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6 |
N.F.B Ch.2 |
12 |
Output Ch.1 |
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■ Block Diagram
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1 |
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11 |
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2 |
Input |
Driver |
Output |
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12 |
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Circuit |
Circuit |
Circuit |
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Over Current |
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3 |
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Over Temperature |
10 |
VCC |
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Protection |
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5 |
Input |
Driver |
Output |
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7 |
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Circuit |
Circuit |
Circuit |
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6 |
4 |
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9 |
8 |
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GND (Input) |
GND (Output) |
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AN7147N |
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ICs for Audio Common Use |
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■ Absolute Maximum Ratings (Ta= 25˚C) |
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Parameter |
Symbol |
Rating |
Unit |
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Supply Voltage |
VCC |
24 |
V |
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Supply Current |
ICC |
4 |
A |
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Power Dissipation * |
PD |
41.7 |
W |
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Operating Ambient Temperature |
Topr |
– 30 ~ + 75 |
˚C |
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Storage Temperature |
Tstg |
– 55 ~ + 150 |
˚C |
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* Rθj – c = 3˚C/W |
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■ Electrical Characteristics (VCC = 12V, RC = 3Ω , f = 1kHz, Ta = 25˚C)
Parameter |
Symbol |
Condition |
min. |
typ. |
max. |
Unit |
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Quiescent Circuit Current |
ICQ |
Vi = 0mV |
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13 |
19 |
mA |
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Voltage Gain |
GV |
PO = 1.0W |
42.5 |
44.5 |
46.5 |
dB |
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PO = 1.0W, f = 1kHz |
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0.2 |
0.75 |
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Total Harmonic Distortion |
THD |
PO = 1.0W, f = 100Hz |
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0.4 |
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% |
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PO = 1.0W, f = 10kHz |
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0.3 |
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THD = 10%, RL = 3Ω |
4.7 |
5.3 |
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Maximum Output Power |
PO |
THD = 10%, RL = 4Ω |
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4.3 |
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W |
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THD = 10%, VCC = 9V, RL = 3Ω |
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2.9 |
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Rg = 10kΩ , f = 15Hz ~ 30kHz, |
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0.25 |
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Output Noise Voltage |
Vno |
12dB/OCT |
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mV |
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Rg = 10kΩ , Without Filter |
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0.40 |
0.5 |
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Channel Balance |
CB |
PO = 0.5W |
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0 |
1 |
dB |
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Channel Separation |
CS |
PO = 0.5W |
40 |
50 |
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dB |
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Ripple Rejection Ratio |
RR |
PO = 0.5W |
45 |
50 |
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dB |
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Output Offset Voltage |
VO (offset) |
Vi = 0 |
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0 |
200 |
mV |
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Note) Operating Supply Voltage Range : 5V to 22V
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PD – Ta |
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50 |
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Tc= Ta (θj – c = 3˚C/W) |
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(1) |
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(2) |
With a 100cm2 × 3mm Al |
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heat sink (black color coated) |
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40 |
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or a 200cm2 × 2mm Al heat |
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(W) |
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(1) |
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sink (not lacquered) |
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(3) |
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With a 100cm2 × 2mm Al |
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D |
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heat sink (not lacquered) |
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P |
30 |
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(4) |
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Without heat sink |
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Dissipation |
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20 |
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Power |
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(2) |
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10 |
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(3) |
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(4) |
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0 |
40 |
80 |
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120 |
160 |
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0 |
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Ambient Temperature Ta (˚C)
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