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UC3800 - LOW COST POWER-SAVING MODE PWM CONTROLLER

General Description

The UTC UC3800 is a high performance current mode PWM controller ideally suited for low standby power.

Key Features

  • S.
  • UTC proprietary frequency hopping technology for Improved EMI performance.
  • Power-saving mode for high light-load and standby efficiency.
  • Soft Start.
  • Dynamic peak current limiting for constant output power.
  • Built-in synchronized slope compensation.
  • OTP,OLP,OVP, LNO-OV, Brownout and VDD clamp for higher security.
  • Fixed switch frequency 65kHz.
  • Gate output voltage clamped at 16V.
  • Low start-up current.
  • Cycle-by-cycle Current Limiting.
  • Under.

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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.

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UNISONIC TECHNOLOGIES CO., LTD UC3800 Preliminary LINEAR INTEGRATED CIRCUIT LOW COST POWER-SAVING MODE PWM CONTROLLER FOR FLYBACK CONVERTERS  DESCRIPTION The UTC UC3800 is a high performance current mode PWM controller ideally suited for low standby power. High voltage startup is implemented in UTC UC3800, which features with short startup time and no standby current. At no load condition, the IC operates in power-saving mode for lower standby power, decreasing frequency for higher conversion efficiency at light load condition. The internal slope compensation improves system stability at high PWM duty cycle output. Leading-edge blanking on current sense input removes the signal glitch, which offering minimal external component count in the design.