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UC3863A - LOW COST POWER-SAVING MODE PWM CONTROLLER

General Description

The UC3863A is a high performance current mode PWM controller ideally suited for low standby power.

The PWM switching frequency is programmable externally at normal operation.

Key Features

  • S.
  • UTC proprietary frequency hopping technology for Improved EMI performance.
  • Power-saving mode for high light-load and standby efficiency.
  • Dynamic peak current limiting for constant output power.
  • Built-in synchronized slope compensation.
  • OLP with automatic recovery.
  • OTP and OVP with automatic recovery.
  • VDD clamp for higher security.
  • Programmable PWM Frequency.
  • Gate output voltage clamped at 16V.
  • Low start-up current.
  • Cycle-by-cycle Current.

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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 UC3863A LINEAR INTEGRATED CIRCUIT LOW COST POWER-SAVING MODE PWM CONTROLLER FOR FLYBACK CONVERTERS „ DESCRIPTION The UC3863A is a high performance current mode PWM controller ideally suited for low standby power. The PWM switching frequency is programmable externally at normal operation. Low VDD startup current make the power reliable on startup design and a large value resistor could be used in the startup circuit to minimize the standby power. 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.