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USL3638 - HIGH PRECISION PSR CONSTANT CURRENT LED DRIVER

Datasheet Summary

Description

discontinuous conduction mode for inductor current.

Features

  • Built-in 650V Power MOSFET.
  • No Auxiliary winding for sensing and supplying.
  • Constant current control without secondary sense and feedback circuit.
  • Ultra low operating current to improve efficiency.
  • Universal input voltage.
  • ±5% LED current accuracy.
  • Choice for maximum duty cycle and OVP voltage.
  • CS resistor short circuit protection.
  • LED short and open circuit protection.
  • Over temperature protection.
  • VCC under-voltage protection.
  • ORD.

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Datasheet preview – USL3638

Datasheet Details

Part number USL3638
Manufacturer UTC
File Size 291.26 KB
Description HIGH PRECISION PSR CONSTANT CURRENT LED DRIVER
Datasheet download datasheet USL3638 Datasheet
Additional preview pages of the USL3638 datasheet.

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Full PDF Text Transcription

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UNISONIC TECHNOLOGIES CO., LTD USL3638 Advance HIGH PRECISION PSR CONSTANT CURRENT LED DRIVER CMOS IC  DESCRIPTION DIP-8 The UTC USL3638 is a high performance, high precision primary-side feedback and regulation and constant current controller for LED lighting, The UTC USL3638 operates in discontinuous conduction mode for inductor current. It is suitable for flyback convertor under the 90V~264V universal input. The system output power for UTC USL3638 (SOP8) and UTC SOP-8 USL3638 (DIP8) is recommended to be less than 8W and 11W. The UTC USL3638 integrates 650V power MOSFET. Since adopting primary sense and feedback control technology, the secondary sense and feedback circuit is eliminated.
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