PT4207 is a high-voltage buck LED driver control chip suitable for input voltage range from 18V to 450V. It features a wide input voltage range, support for series and parallel drive applications, support for external MOS tube to increase current, and multi-function dimming.
The PT4207 LED driver from Micro Bridge supports a universal AC input from 18 V to 450 V and provides efficient, stable current regulation for high‑brightness LEDs. It includes an internal 330 mA switch and can be expanded with an external MOSFET for higher currents.
The device offers linear or PWM dimming via the DIM pin, built‑in soft‑start, overload, short‑circuit, open‑circuit and over‑temperature protection, and is supplied in an SOP‑8 package suitable for a wide range of lighting applications. This manual is written in Chinese.
| Input voltage range | 18 V to 450 V |
|---|---|
| Internal switch current | 330 mA |
| Maximum duty cycle | 100 % |
| Package type | SOP‑8 |
| Over‑temperature shutdown threshold | 150 °C |
The PT4207 accepts a universal input voltage from 18 V up to 450 V.
LED current is set by an external resistor, and can be linearly adjusted or PWM‑controlled via the DIM pin.
The driver is supplied in an SOP‑8 surface‑mount package.