CM3842/3843
CURRENT MODE PWM CONTROLLER
ORDERING INFORMATION
Part Number
CM3842/43CP
CM3842/43CS
Temperature Range
0℃ to 70℃
0℃ to 70℃
Package
8-Pin PDIP(P08)
8-Pin SOIC(S08)
BLOCK DIAGRAM
Internal
Bias
U.V.L.O.
36V
VREF
8
5V EN
VREF
7 VCC
5 GND
VFB
2
COMP 1
CURRENT 3
SENSE
RT/CT 4
VREF
Good Logic
Error Amp
2R
R
Oscillator
Current
Sense
C
1V
R
PWM
Latch
S
T
7 PWR
VC
OUTPUT
6
PWR
5 GND
Note 1 :VCC and PWR VC are internally connected for 8 pin packages.
Note 2 :PWR GND and GND are internally connected for 8 pin packages.
Note 3 :U.V.L.O. is 16V for 3842 and 8.4V for 3843.
Note 4 :Hysteresis is 6V for 3842 and 0.8V for 3843.
2001/06/27 Advanced
Champion Microelectronic Corporation
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