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| CS2844 Datasheet, PDF (2/12 Pages) Cherry Semiconductor Corporation – Current Mode PWM Control Circuit with 50% Max Duty Cycle | |||
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CS2844, CS3844, CS2845, CS3845
DIPâ8 & SOâ8
1
COMP
VFB
Sense
OSC
8
VREF
VCC
VOUT
GND
PIN CONNECTIONS
SOâ14
1
COMP
NC
14
VREF
NC
VFB
NC
Sense
NC
VCC
VCC Pwr
VOUT
GND
OSC
Pwr GND
1
NC
NC
COMP
VFB
Sense
OSC
NC
NC
SOâ16L
16
NC
VREF
VCC
VCC Pwr
VOUT
GND
Pwr GND
NC
VCC
GND
VFB
COMP
OSC
VCC Undervoltage Lockout
34 V
16 V/10 V
(8.4 V/7.6 V)
Set/
5.0 V
Reset Reference
Error
Amplifier
2.50 V
Oscillator
R
VREF
Undervoltage
Lockout
R
Toggle
FlipâFlop
Internal
Bias
NOR
Sense
2R
S
R
R
1.0 V
Current
PWM
Latch
Sensing
Comparator
( ) Indicates CS2845/3845
Figure 1. Block Diagram
VCC Pwr
VREF
VOUT
Pwr GND
http://onsemi.com
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