CS2842A Datasheet, PDF (2/10 Pages) Cherry Semiconductor Corporation – Off-Line Current Mode PWM Control Circuit with Undervoltage Lockout

CS2842A, CS3842A, CS2843A, CS3843A
PIN CONNECTIONS
DIP−8 & SO−8
1
COMP
V_FB
Sense
OSC
8
V_REF
V_CC
V_OUT
GND
SO−14
1
COMP
NC
14
V_REF
NC
V_FB
NC
Sense
NC
V_CC
V_CC Pwr
V_OUT
Pwr GND
OSC
GND
V_CC
GND
OSC
V_FB
COMP
Sense
34 V
Undervoltage
Lock−out Circuit
Set/
Reset
16 V/10 V
(8.4 V/7.6 V)
5.0 V
Reference
2.50 V
Oscillator
Output
Enable
Internal
Bias
NOR
+
2R
−
Error
V_C
Amplifier
R
1.0 V
S
R
Current
Sensing
Comparator
PWM
Latch
( ) Indicates CS2843A/3843A
Figure 1. Block Diagram
V_CC Pwr
V_REF
V_OUT
Pwr GND
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