UC3842B, UC3843B, UC2842B, UC2843B, NCV3843BV
From V
O
2.5V
+
1.0mA
R
2R
i
2(3)
EA
R
C
f
R
f
R
d
1(1)
R ≥ 8.8 k
f
5(9)
Error Amp compensation circuit for stabilizing any current mode topology except for boost and flyback
converters operating with continuous inductor current.
From V
2.5V
O
+
1.0mA
R
p
2R
R
2(3)
i
R
EA
C
C
f
R
f
p
R
d
1(1)
5(9)
Error Amp compensation circuit for stabilizing current mode boost and flyback
topologies operating with continuous inductor current.
Figure 32. Error Amplifier Compensation
V
CC
V
in
7(12)
36V
5.0V Ref
+
-
8(14)
R
R
R
T
Bias
MPS3904
+
-
7(11)
6(10)
Osc
R
Slope
From V
4(7)
2(3)
O
C
T
+
-m
S
R
1.0mA
R
R
i
2R
Q
5(8)
3(5)
EA
R
C
1.0V
f
Comp/Latch
R
f
d
m
R
S
1(1)
- 3.0m
5(9)
The buffered oscillator ramp can be resistively summed with either the voltage
feedback or current sense inputs to provide slope compensation.
Figure 33. Slope Compensation
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