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S3843

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 ; t...

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SeekIC No. : 004482023 Detail

S3843: 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 Voltag...

S3843 Data Sheet

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Part Number:
S3843
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/23

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Product Details

Description



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


Pinout

Connection Diagram


Specifications

Characteristic
Symbol
Ratings
Unit
Supply voltage
VCC
30
V
Output Current
Io
1
A
Analog Inputs
Vi(ana)
-0.3 to 6.3
V
Error Amp. Output Sink current
Isink(EA)
10
mA
Power Dissipation
Pd
1
W
note) All voltages are with respect to PIN5, and current are positive into the specified pin.


Description

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.




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