WT7239数据手册Weltrend中文资料规格书

描述 Description

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.

特性 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