• Part: OB3639B
  • Manufacturer: On-Bright
  • Size: 412.03 KB
Download OB3639B Datasheet PDF
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OB3639B Key Features

  • Fast start up
  • High PF (>0.9)
  • Low THD (<10%)
  • Programmable line voltage foldback
  • Programmable line voltage OVP
  • NTC thermistor thermal foldback
  • High precision constant current
  • Low system cost and high efficiency
  • Quasi-resonant operation
  • Programmable CC regulation

Related On-Bright Datasheets

Part Number Description
OB3639A Low THD Offline LED Lighting Controller
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OB3636 Low THD Offline CV Controller
OB3636A Low THD Offline CV Controller
OB3613 High PF Non-Isolated Buck LED Lighting Controller

OB3639B Description

OB3639B is an offline LED lighting controller with high power factor, low THD and high constant current (CC) precision. It can achieve low system cost for isolated lighting application by primary side control in a single stage converter. It significantly simplifies the LED lighting system design by eliminating the secondary side feedback ponents and the opto-coupler.