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S3843 - Current Mode PWM Controller

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 Details

Part number S3843
Manufacturer AUK corp
File Size 295.60 KB
Description Current Mode PWM Controller
Datasheet download datasheet S3843 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
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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