描述 Description

Non-Isolated Buck LED Driver with High Voltage MOSFET

DW8531 is a constant current LED driver with high current accuracy which applies to single stage step-down LED drivers. 500V power MOS is integrated, which can significantly simplify the peripheral components. High accuracy of output current is achieved by sensing the output current directly. Critical conduction mode operation reduces the switching losses and significantly increases the efficiency. DW8531 can be supplied from the output directly and the auxiliary winding is not needed. DW8531 has multi-protection functions which enhances the safety and the reliability of system including: VCC over-voltage protection, VCC UVLO, short-circuit protection, LED open protection, cycle-by-cycle current limit and overtemperature protection.

特性 Features

- Constant output current invariant to supply and load voltage change
- 5V to 40V supply voltage
- Up to 300mA adjustable regulated output current
- Built-in thermal derating circuit
- Available PWM dimming control
- Output current adjusted through an external resistor
- SOT89-5L Package

應(yīng)用 Application

- LED light bulbs
- Signage and decorative LED lighting
- General lighting of flat panel displays
- RGB backlighting LED driver
- Current stabilizer with DC/DC or AC/DC
- General purpose constant current source