LA4906 查看數據表（PDF） - SANYO -> Panasonic
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LA4906 Datasheet PDF : 10 Pages
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Equivalent Circuit Block Diagram
LA4906
Standby
switch
Standby switch
Ripple filter
Switching
regulator
block
*
*
Switch
driver
Input amplifier
Amplifier output stage
Nonlinear amplifier/output stage
Beep amplifier
Power supply/ground shorting
protection circuit
Overvoltage/thermal
protection circuit
Input amplifier
Nonlinear amplifier/output stage
Muting circuit used
at power on
Popping noise
prevention circuit
TR1
Switching transistor
2SD1668, class S
(Tokin Co. Ltd.)
D1
SB40-05J
Flywheel diode
(OS capacitor)
4 to 2 Ω
* = Polyester film capacitors
4 to 2 Ω
Pin Voltages (At VCC = 13.2 V, with 5 V applied to STBY through a 10 kΩ resistor, using a digital voltmeter)
Pin No.
1
2
3
Pin
IN2
Pre - GND
IN1
Pin voltage (V)
1.36
0
1.36
4
5
6
7
8
BEEP
PWR - GND 1 –OUT1
+OUT1
C
1.36
0
2.03
2.03
13.0
Pin No.
9
Pin
C
Pin voltage (V)
3.92
10
VCC
13.2
11
VCC (SW)
13.2
12
SW OUT1
3.70
13
SW OUT2
3.70
14
SW E
3.73
15
SE B
4.0
16
SW - GND
0
Pin No.
Pin
Pin voltage (V)
17
+OUT2
2.03
18
–OUT2
2.03
19
PWR - GND2
0
20
D. C
12.1
21
STAND-BY
3.21
22
DDL OUT
0
23
ON-TIME
2.81
No. 5714-4/10
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