LA4743A
Pin Functions and Equivalent Circuits at VCC = 14.4 V, ST-BY = 5 V
Pin No.
1
Function
TAB
DC voltage [V]
Notes
Internal equivalent circuit
2
8
POWER GND
18
24
VCC
130 Ω
3
–OUT2
5
+OUT2
7
–OUT1
9
+OUT1
2.7
17
+OUT3
19
–OUT3
21
+OUT4
23
–OUT4
Low saturation
voltage circuit
130 Ω
4
ST-BY
4
• The amplifier will be on when the
applied voltage is between 2 V and
VCC.
10 kΩ
30 kΩ
3
5
7
9
17
19
21
23
A13497
1.5 kΩ
6
VCC1/2
20
VCC3/4
10
SVR
13.2
• Low ripple power supply line for all
internal IC blocks
A13498
Bias circuit ST-BY power
supply line
Input amplifier ST-BY
power supply line
VCC
200 Ω 200 Ω
10
1 kΩ
A13499
Continued on next page.
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