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KA3844 Arkusz danych(PDF) 4 Page - Estek Electronics Co. Ltd

Numer części KA3844
Szczegółowy opis  fixed frequency current mode PWM controller
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Producent  ESTEK [Estek Electronics Co. Ltd]
Strona internetowa  http://www.estek.com.cn/en/index.asp
Logo ESTEK - Estek Electronics Co. Ltd

KA3844 Arkusz danych(HTML) 4 Page - Estek Electronics Co. Ltd

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VREF
VREF
8
RT
RT
8
RSLOPE
RT /CT
4
MIK3842
RSLOPE
RT /CT 4
MIK3842
IS
IS
RS
R1
ISENSE
3
5
RS
R1
ISENSE
3
5
GND
GND
Figure 4. Slope Compensation Techniques
SCR must be selected for a holding current of less than 0.5mA.
The simple two transistor circuit can be used in place of the SCR as shown.
Figure 5. Latched Shutdown
From V
0
R
I
R
d
V
FB
C
f
Rf
2.5 V
+
-
2
1
EA
+
1mA
2R
R
From V
0
R
p
C
p
R
I
C
f
V
FB
R
f
2.5 V
+
-
2
EA
+
1mA
2R
R
COMP
5
COMP
1
5
Error Amp compensation circuit for stabilizing any current-mode topology except for
boost and flyback converters operating with continuous inductor current.
Error Amp compensation circuit for stabilizing current-mode boost and flyback
topologies operating with continuous inductor current.
Figure 6. Error Amplifier Compensation
4
BEIJING ESTEK ELECTRONICS CO.,LTD


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