WT7239
【 General 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. |
【 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 |