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WD3139 - 38V Step-Up White LED Driver

General Description

The WD3139 is a constant current, high efficiency LED driver.

Internal MOSFET can drive up to 10 white LEDs in series with 1.2A current limit and 38V OVP.

A Pulse-Width-Modulation (PWM) signal can be applied to the EN pin for LED dimming.

Key Features

  • Input voltage range : 2.7~5.5V.
  • Open LED Protection : 38V (Typ. ).
  • Reference Voltage : 200mV (±5%).
  • Switching frequency : 1MHz (Typ. ).
  • Efficiency : Up to 92%.
  • Main switch current limit : 1.2A (Typ. ).
  • PWM Dimming frequency : 5KHz to200KHz.
  • PWM Dimming Duty Cycle : 0.5% ~ 100%.

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Datasheet Details

Part number WD3139
Manufacturer WillSEMI
File Size 1.26 MB
Description 38V Step-Up White LED Driver
Datasheet download datasheet WD3139 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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WD3139 High Efficiency, 38V Step-Up White LED Driver WD3139 Http//:www.sh-willsemi.com Descriptions The WD3139 is a constant current, high efficiency LED driver. Internal MOSFET can drive up to 10 white LEDs in series with 1.2A current limit and 38V OVP. A Pulse-Width-Modulation (PWM) signal can be applied to the EN pin for LED dimming. The device operates at 1MHz fixed switching frequency to reduce output ripple, improve conversion efficiency, and allows using small external components. The WD3139 is available in TSOT-23-6L Package. Standard product is Pb-free and Halogen-free. Features  Input voltage range : 2.7~5.5V  Open LED Protection : 38V (Typ.)  Reference Voltage : 200mV (±5%)  Switching frequency : 1MHz (Typ.