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UC3873L Datasheet LOW COST POWER-SAVING MODE PWM CONTROLLER

Manufacturer: Unisonic Technologies

Overview: UNISONIC TECHNOLOGIES CO., LTD UC3873L LINEAR INTEGRATED CIRCUIT LOW COST POWER-SAVING MODE PWM CONTROLLER FOR FLYBACK CONVERTERS.

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General Description

The UTC UC3873L is a high performance current mode PWM controller ideally suited for low standby power.

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.

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.
  • OLP with automatic recovery.
  • OTP and OVP( in UTC UC3873L with latch shut down).
  • VDD clamp for higher security.
  • Programming OTP for higher security.
  • Fixed switch frequency 65kHz.
  • Gate output vo.

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