UC3842A View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'UC3842A' PDF : 15 Pages View PDF
UC2842A/3A/4A/5A - UC3842A/3A/4A/5A
Figure 23: Soft-Start Circuit
8
4
2
1MΩ
1
C
R
BIAS
R
5Vref
+
-
OSC
+
+
-
EA
1mA
2R
R
S
Q
+
R
1V
-
5
D95IN354
Figure 24: Soft-Start and Error Amplifier Output Duty Cycle Clamp.
VCC Vin
7
8
R
BIAS
R
5Vref
+
-
4
OSC
+
2
R2
1
+
-
EA
1mA
VClamp
S
2R
-
Q
+
R
R
1V
Comp/Latch
5
C
R1 BC109
· VCLAMP =
R1
R1 + R2
where 0 <VCLAMP <1V
Ipk(max) =
VCLAMP
RS
7
6
Q1
5
RS
D95IN355
12/15
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