ICs for Audio Common Use
AN7171NK, AN7176K
Dual BTL 14W Audio Power Amplifier Circuits
■ Overview
The AN7171NK and AN7176K are ICs for power amplification of 14W (13.2V, 4Ω ) output. It can provide stereo operation since two BTL amplifiers are incorporated in a chip. It incorporates various protective circuits, thus providing high reliability. The circuits can be turned on or off with supply pins energized, because the stand-by circuit is built-in.
■ Features
•Two BTL 14W outputs built-in
•Stand-by circuit built-in
•Various protective circuits (for temperature, or against over-voltage, short-circuit between output and earth and between output and VCC, load short-circuit)
•Small shock noise at power ON/OFF
•Fewer external components required
•Good oscillation stability
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5.9±0.25 7.7±0.3 |
7.8±0.5 |
Unit : mm |
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ø 3.6 |
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6.33±0.5 |
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16 |
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29.96±0.3 |
28.0±0.3 |
20.0±0.25 0.6 |
R1.8 |
1.778 0.6±0.2 |
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29.6±0.3 |
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1 |
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3.5±0.3 |
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2.8±0.3 |
12.5±0.3 |
2.66 |
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(4.06) |
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(14.1) |
(0.25) |
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1.2±0.1 |
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1.45±0.25 |
2.54±0.8 |
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1.8±0.25 |
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(1.2) |
1.45±0.25 |
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Fin-attached 16-lead ZIP package (EZIP016-P-0660) |
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■ Block Diagram
NF (Ch.1) NF (Ch.1)
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8 |
7 |
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VCC |
1 |
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Input |
Driver |
Output |
4 |
OUT (Ch.1) (+) |
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Circuit |
Circuit |
Circuit |
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Ripple Filter |
13 |
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3 |
GND |
(Ch.1) IN |
6 |
Input |
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Driver |
Output |
2 |
OUT (Ch.1) (–) |
Circuit |
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Circuit |
Circuit |
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STAND-BY |
5 |
Stand-by |
Protection Circuit |
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Circuit |
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(Ch.2) IN |
12 |
Input |
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Driver |
Output |
16 |
OUT (Ch.2) (+) |
Circuit |
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Circuit |
Circuit |
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15 |
GND |
GND |
10 |
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Input |
Driver |
Output |
14 |
OUT (Ch.2) (–) |
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Circuit |
Circuit |
Circuit |
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11 |
9 |
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NF NF (Ch.2) (Ch.2)
ICs for Audio Common Use |
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AN7171NK, AN7176K |
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■ Pin Descriptions |
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Pin No. |
Pin Name |
Pin No. |
Pin Name |
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1 |
VCC |
9 |
Negative Feedback Ch.2 |
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2 |
Output Ch.1 (+) |
10 |
GND (Input) |
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3 |
GND (Output Ch.1) |
11 |
Negative Feedback Ch.2 |
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4 |
Output Ch.1 (–) |
12 |
Input Ch.2 |
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5 |
Stand-by |
13 |
Ripple Filter |
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6 |
Input Ch.1 |
14 |
Output Ch.2 (–) |
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7 |
Negative Feedback Ch.1 |
15 |
GND (Output Ch.2) |
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8 |
Negative Feedback Ch.1 |
16 |
Output Ch.2 (+) |
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■ Absolute Maximum Ratings (Ta= 25˚C)
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Parameter |
Symbol |
Rating |
Unit |
Supply Voltage |
VCC Note 1) |
24 |
V |
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Peak Supply Voltage |
VCC (surge) Note 2) |
50.0 |
V |
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Supply Current |
ICC |
6.0 |
A |
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Power Dissipation |
PD Note 3) |
37.5 Note 4) |
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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Note 1) |
When no signals |
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Note 2) |
Time = 0.2s |
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Note 3) |
Rθj – c = 2˚C/W |
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Note 4) |
Ta = 75˚C |
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■ Recommended Operating Range (Ta = 25˚C)
Parameter |
Symbol |
Range |
Operating Supply Voltage Range |
VCC |
8.0V ~ 18.0V |
■ Electrical Characteristics (VCC = 13.2V, RL= 4Ω , f = 1kHz, Ta = 25˚C)
Parameter |
Symbol |
Condition |
min. |
typ. |
max. |
Unit |
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Quiescent Current |
ICQ |
Vin= 0mV |
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120 |
200 |
mA |
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Output Noise Voltage Note) |
Vno |
Vin= 0mV, Rg= 10kΩ |
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0.60 |
1.50 |
mVrms |
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Voltage Gain |
GV |
Vin= 5mV |
50.5 |
52.5 |
54.5 |
dB |
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Total Harmonic Distortion |
THD |
Vin= 5mV |
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0.20 |
0.75 |
% |
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Max. Output Power (4Ω ) |
PO |
THD= 10% |
9.0 |
12.5 |
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W |
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Ripple Rejection Ratio Note) |
RR |
Rg= 0Ω , Vin= 0mV, |
35 |
40 |
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dB |
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Ripple= 300mVrms, 120Hz |
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Output Offset Voltage |
VO (offset) |
Rg= 0Ω |
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–200 |
0 |
+ 200 |
mV |
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Channel Balance |
CB |
Vin= 5mV |
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–1 |
0 |
+ 1 |
dB |
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Total Harmonic Distortion |
THD |
Vin= 5mV, 100Hz |
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0.26 |
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% |
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Total Harmonic Distortion |
THD |
Vin= 5mV, 10kHz |
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0.45 |
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% |
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Frequency Characteristics |
fCH |
Vin= 5mV, –3dB down |
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22 |
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kHz |
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Frequency Characteristics |
fCL |
Vin= 5mV, –3dB down |
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21 |
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Hz |
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Stand-by Current |
ISTB |
Stand-by Pin ON |
AN7171NK |
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21 |
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µA |
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AN7176K |
400 |
650 |
1000 |
µA |
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Crosstalk |
CT |
Vin= 5mV, Rg= 10kΩ |
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61 |
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dB |
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Note) With 15Hz to 30kHz (12dB/OCT) filter
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