Universal High Brightness LED Driver With Improved Current Regulation And EMI Performance

The PT4107 is a high voltage buck control IC for constant LED current regulation. It allows efficient operation of High Brightness (HB) LEDs from voltage sources ranging from 18VDC up to 450VDC or 110VAC/220VAC. The PT4107 controls an external MOSFET at fixed switching frequency from 25 kHZ to 200 kHZ. The frequency CAN be programmed using an external resistor. A proprietary peak current control method keeps constant average LED currents for wide input and output ranges. The output current CAN be programmed from a few milliamps up to more than 1A. The output current on one LED string also CAN be programmed to any value between zero and its maximum value by applying an external control voltage at the linear dimming control input of the PT4107. Moreover, PT4107 provides a low-frequency PWM dimming input that CAN accept an external control signal with duty ratio of 0-100% and a frequency of up to a few kilohertz. By China Resources Powtech (Shanghai) Co., Ltd
PT4107 's PackagesPT4107 's pdf datasheet



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PT4107 Application circuits
PT4107 circuits
This is one application circuit of PT4107,If you need more circuits,please download PT4107's pdf datasheet.


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