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S3843 - Current Mode PWM Controller

Datasheet Summary

Description

The S3843 is fixed Current PWM controller for Off-line and DC-DC converter applications.

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. S3843 Marking S3843 Package Code SOP-8 Outline Dimensions unit : mm PIN Connections 1. Output / Compensation 2. Voltage feedback. Input 3. Curre.

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Datasheet preview – S3843

Datasheet Details

Part number S3843
Manufacturer AUK corp
File Size 295.60 KB
Description Current Mode PWM Controller
Datasheet download datasheet S3843 Datasheet
Additional preview pages of the S3843 datasheet.

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Full PDF Text Transcription

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Semiconductor S3843 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.
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