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UL98B - NON ISOLATED BUCK CONSTANT CURRENT LED DRIVER

Datasheet Summary

Description

UL98B is a high precision LED BUCK constant current driver chip.

The chip operates in the inductor current critical continuous mode, which is suitable for the non isolated buck LED constant current power supply with 85Vac~265Vac full range input voltage.

Features

  • S.
  • The integrated 500V power mos.
  • The integrated high voltage power supply function.
  • The inductor current critical continuous mode.
  • Without auxiliary winding detection and power supply.
  • The wide voltage input voltage.
  • ±5% LED output current accuracy.
  • The LED short circuit and open circuit protection.
  • The chip power supply under voltage protection.
  • The regulating function of overheating.

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Datasheet preview – UL98B

Datasheet Details

Part number UL98B
Manufacturer UTC
File Size 184.47 KB
Description NON ISOLATED BUCK CONSTANT CURRENT LED DRIVER
Datasheet download datasheet UL98B Datasheet
Additional preview pages of the UL98B datasheet.

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Full PDF Text Transcription

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UNISONIC TECHNOLOGIES CO., LTD UL98B Preliminary NON ISOLATED BUCK CONSTANT CURRENT LED DRIVER IC CMOS IC  DESCRIPTION UL98B is a high precision LED BUCK constant current driver chip. The chip operates in the inductor current critical continuous mode, which is suitable for the non isolated buck LED constant current power supply with 85Vac~265Vac full range input voltage. UL98B chip integrated 500V power switch by patent demagnetization detection technology and high voltage power supply technology, without detection and power supply for auxiliary winding, the peripheral devices are more simple, saving the cost and volume of the system.
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