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UL22 - LED DRIVER CONTROLLER

Datasheet Summary

Description

Featured Device, UTC UL22, is a PWM controller with innovative Free-DimmingTM technology.

The controller drives one of the two strings of LEDs by an ON/OFF AC wall switch and provides a cost effective solution for light control.

It supports power-factor-correction function in applications.

Features

  • S.
  • Free-DimmingTM technology.
  • Proprietary technology using ON/OFF wall switch to select one of the two LED channels.
  • Supports high-side Buck, Buck-Boost and Flyback topologies.
  • High power factor with Discontinue-Current-Mode (DCM) control.
  • Low start-up current and operating current to maximize conversion efficiency.
  • Under-voltage lockout (UVLO) with hysteresis.
  • Provides complete protection functions -Maximum gate driver output clamp 　-VDD pin Over-Voltage Prote.

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Datasheet preview – UL22

Datasheet Details

Part number UL22
Manufacturer UTC
File Size 404.96 KB
Description LED DRIVER CONTROLLER
Datasheet download datasheet UL22 Datasheet
Additional preview pages of the UL22 datasheet.

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Full PDF Text Transcription

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UNISONIC TECHNOLOGIES CO., LTD UL22 Preliminary LED DRIVER CONTROLLER  DESCRIPTION Featured Device, UTC UL22, is a PWM controller with innovative Free-DimmingTM technology. The controller drives one of the two strings of LEDs by an ON/OFF AC wall switch and provides a cost effective solution for light control. It supports power-factor-correction function in applications. UTC UL22 provides several protection features. It includes a cycle-by-cycle current limit to the power switch; over-current protection at the LED load; bias voltage VDD over-voltage protection. In addition, the driver output (DRV) voltage is clamped for driving the external power MOSFET effectively and safely. The controller also features an internal over-temperature protection.
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