Transcript
ICs for Audio Common Use
AN7149N Dual 5.3W Audio Power Amplifier Circuit ■ Overview
Unit : mm
The AN7149N 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 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.
5.9±0.25 7.7±0.3 7.8±0.25 ø 3.6
1.2±0.1
Pin No.
Pin Name
Pin No.
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 Driver Circuit
Output Circuit
12
Over Current Over Temperature Protection
3
5
Input Circuit 6
Pin Name
1
Input Circuit
29.6±0.3
12-Lead SIP Package with Fin (HSIP012-P-0000A)
■ Pin Descriptions
2
3.5±0.3
1
■ Features • Low quiescent current • High operation stability • Low radiation • Low distortion • Low noise • Low shock noise from power ON/OFF operation • Fewer external components
+ 0.1 0.35 – 0.05 2.54
0.6
R1.8
0.6±0.1
29.96±0.3 28.0±0.3 20.0±0.2
12
Driver Circuit 4 GND (Input)
Output Circuit 9
10 VCC
7
8 GND (Output)
ICs for Audio Common Use
AN7149N ■ Absolute Maximum Ratings (Ta= 25˚C) Symbol
Rating
Unit
Supply Voltage
Parameter
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
■ Electrical Characteristics (VCC = 12V, RC = 3Ω, f = 1kHz, Ta = 25˚C) Parameter
Symbol
Condition
Quiescent Circuit Current
ICQ
Vi = 0mV
Voltage Gain
GV
PO = 1.0W
Total Harmonic Distortion
THD
Output Noise Voltage
Vno
Channel Balance
CB
PO = 0.5W
Ripple Rejection Ratio
RR
PO = 0.5W
PD – Ta 50 (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
Power Dissipation PD (W)
(1)
30
20 (2) 10
(3) (4)
0
0
40
80
120
Ambient Temperature Ta (˚C)
4.7
160
typ.
max.
Unit
13
19
mA
49.5
51.5
dB
0.2
0.5
%
5.3 4.3
THD = 10%, RL = 4Ω THD = 10%, VCC = 9V, RL = 3Ω Rg = 10kΩ, f = 15Hz ~ 30kHz, 12dB/OCT
PO
40
47.5
PO = 1.0W, f = 1kHz THD = 10%, RL = 3Ω
Maximum Output Power
min.
W
2.9
40
0.5
1.0
mV
0
1.0
dB
45
dB
ICs for Audio Common Use
AN7149N
GV, THD – f
PO – VCC
RL = 4Ω 8 RL = 6Ω
48 VCC = 12V RL = 3Ω Vin = 3mV
46
1.0
45 44
6
0.8 0.6
4 0.4 2 0
THD
0
4
8
12
16
10
20
10
10 47
100
0.2
1k
10k
100k
f = 10kHz
0.1
0.1 PO f = 1kHz
0.01 0.1
1
10
100
Input Voltage Vin (mV)
Vno – Rg
■ Application Circuit
VCC = 12V RL = 3Ω
VCC –
+
1000µF 10
0.1µF
1 100µF
FLAT
11
+ –
2
0.6
+
47µF – 12
Input Ch.1
2.2Ω 1000µF +
–
+
–
AN7149N
0.4 DIN/AUDIO
7
5 Input Ch.2
0.2
47µF –
1000µF
+
0 10
100
1k
10k
100k
100µF
Input Resistance Rg (Ω)
6
+
8 4
–
0.1µF
9 2.2Ω
Printed Circuit Board Layout
AN7149N Output2 – +
1000µF
Input2
GND – +
100µF
100µF
– +
100µF
2.2
Ω
– + 47µF
Input1 1
– +
Output1
1000µF
µF
0.1
0.1µF + –
2.2Ω
Output Noise Voltage Vno (mV)
3
0.8
1000µF
–
+
1.0
VCC
+ – + –
47µF 12
1
f = 1kHz
Frequency f (Hz)
Supply Voltage VCC (V)
THD
f = 100Hz
1
1000µF GND
Total Harmonic Distortion THD (%)
10
VCC = 12V RL = 3Ω
GV
Output Power PO (W)
RL = 3Ω
49
Total Harmonic Distortion THD (%)
RL = 2Ω 12
Voltage Gain GV (dB)
THD = 10% f = 1kHz
14
Maximum Output PO (W)
PO, THD – Vin
50
16
