Weltrend | Products

LED drivers

WT7239

The WT7239 is a high efficiency DC-DC controller capable of driving up to 4 constant current outputs. A built-in step-up converter automatically adjusts the supply voltage level for LED strings. The controller can receive either an analog signal or a Pulse Width Modulation (PWM) signal for the dimming control function.
The IC provides the user with over/under voltage protection, over temperature protection and over current protection features. The IC has high accurate current drivers with a minimized current mismatch among LED strings.

Features

- Supply voltage from 4.5V to 32V
- Auto setting the step-up controller regulates output just above the highest LED string voltage
- ±1.5％ typical regulates string current accuracy.
- Output current set by an external resistor (range: 50 to 240mA per channel)
- Programmable Switching Frequency
- Soft start eliminates inrush current
- LED open/short protection
- Over-Temperature protection
- Over-Voltage protection
- Under-Voltage protection
- Over Current protection
- Low Standby Current
- Package type :
- 16-pin SOP, Green package

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