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S3843P Datasheet(PDF) 1 Page - AUK corp

Part No. S3843P
Description  Current Mode PWM Controller
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Maker  AUK [AUK corp]
Homepage  https:www.auk.co.kr
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S3843P Datasheet(HTML) 1 Page - AUK corp

   
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KSI-L007-000
1
S3843P
Current Mode PWM Controller
Descriptions
The S3843 is fixed Current PWM controller for Off-line and DC-DC converter applications.
The internal circuits feature a trimmed oscillator for precise duty cycle control, a
temperature compensated reference, high gain error amplifier current sensing comparator,
and a high current totempole output for driving a power MOSFET. Protection circuitly
includes built in under voltage lockout and current limiting. S3843 have UVLO threshold of
8.4V(on) and 7.6V(off). S3843 can operate within 100% duty cycle.
Features
• Optimized for off-line and DC to DC converters
• Low start up current < 1 mA
• Operating range up to 500 KHz
• Pulse-by-pulse current limiting
• Under Voltage Lock Out with hysteresis
High current totempole output
• Short shutdown delay time ; typical 100nsec
Ordering Information
Type NO.
Marking
Package Code
S3843P
S3843P
DIP-8
Outline Dimensions
unit : mm
S
Seem
miiccoon
nd
du
uccttoorr
PIN Connections
1. Output / Compensation
2. Voltage feedback. Input
3. Current sense Input
4. Rt/Ct
5. GND
6. Output
7. Vcc
8. Vref


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