pbl388141sot ETC-unknow, pbl388141sot Datasheet - Page 11

• Manufacturer Part Number: pbl388141sot
• Description: Voice Switched 2-channel Circuit With Loudspeaker Amplifier
• Manufacturer: ETC-unknow

Figure 19. External power amplifier
Figure 18. Application with ac. volume control.
100 F
6 V
+
PBL
388 14
820
820
MIC.
signal
Tx
22
19
20
68nF
150nF
68nF
150nF
15n
10
6.8nF
18
16
2
24
4
3
1
5
F1
BD131
BD132
+
15n
F3
F2
15nF
+
8
100 F
6 V
470 k
19
+
+
+
100 F
16 V
21
1000 F
LOUDSPEAKER
+
6
2.2 F/6V
50
4
20
Control
+
4 - 15 V
-
9
100nF
PBL 388 14
+
22
10
2.2 F/6V
Ref.
7
be broken (pinns 19 and 20) thus making it
possble to insert external power transistors
to increase the audio output power. This
enables with external power supply an out-
put power of several watts fed into 4 - 16 ohm
loudspeaker. See. fig. 19.
F6
F5
The power amplifier feedback loop can
+ supply
F4
17
13
23
12
11
15
14
100nF
+
33nF
4.7nF
1 F
220nF
47k
68nF
PBL 388 14
50k
0 V
signal
Rx
11