AN12945A Panasonic, AN12945A Datasheet - Page 2

• Manufacturer Part Number: AN12945A
• Description: Monaural Audio Power IC with Built-in AGC
• Manufacturer: Panasonic

Audio Input
−22dBV
−28dBV
Block Diagram
Pin Descriptions
Pin
No.
1
2
3
4
5
6
7
8
9
10
for LPF
0.47µF
VREF
33kΩ
SP amp. input
Detection terminal for AGC
GND
VREF for SP amp. system
VCC for SP amp. system
SP amp. Output (+)
GND for SP amp. system
SP amp. Output (−)
Regulator voltage output
AGC-ON level setup and AGC On/Off
GND
−16dBV
1µF
Note) This circuit and these circuit constants show an example and do not guarantee the design an a mass-production set.
47kΩ
16
17
18
19
20
0.47µF
Description
－
+3dB
+
+3dB
+9dB
VREG
15
1
1µF
VCC
AGC
AGC
AGC DET
Det
14
2
GND
13
3
Pin
No.
11
12
13
14
15
16
17
18
19
20
VREFSP
12
4
1µF
Gain change 0dB/6dB
SP power save On/Off
Standby On/Off control
VCC
Ripple removal condenser terminal for
the regulator
VREF
Input terminal (negative return terminal)
First rank amplifier output
GND
AGC output
VCC-SP
AGC ON/OFF
LEVEL SET
+14dB
+14dB
11
VREG
OUT
5
and
1µF
2.25V
Description
1µF
10
9
8
7
6
− 2dBV
−2dBV
GND-SP
VCC_SP
From microcomputer
12 kΩ
VCC
Speaker
3.30V
+4dBV
5.00V
10 kΩ
8Ω