KA3843 ESTEK [Estek Electronics Co. Ltd], KA3843 Datasheet - Page 4

• Manufacturer Part Number: KA3843
• Description: fixed frequency current mode PWM controller
• Manufacturer: ESTEK [Estek Electronics Co. Ltd]

From V
R
R
d
I
0
Error Amp compensation circuit for stabilizing any current-mode topology except for
boost and flyback converters operating with continuous inductor current.
C
COMP
f
V
R
FB
R
I
f
S
S
2.5 V
2
R
1
R
SLOPE
1
+
-
EA
The simple two transistor circuit can be used in place of the SCR as shown.
R
T
+
1mA
SCR must be selected for a holding current of less than 0.5mA.
R
I
SENSE
T
V
/C
REF
T
2R
Figure 4. Slope Compensation Techniques
Figure 6. Error Amplifier Compensation
8
R
3
4
MIK3842
5
Figure 5. Latched Shutdown
5
GND
4
C
From V
p
I
R
S
R
R
S
p
R
0
SLOPE
R
1
Error Amp compensation circuit for stabilizing current-mode boost and flyback
topologies operating with continuous inductor current.
I
R
C
T
f
COMP 1
R
I
SENSE
V
V
T
R
BEIJING ESTEK ELECTRONICS CO.,LTD
FB
/C
REF
f
T
2
2.5 V
+
-
8
4
3
EA
MIK3842
5
GND
+
1mA
2R
R
5