描述 Description

Primary-Side Regulator LED Controller with Active PFC

DW8551 is a primary-side control offline fly-back controller with active power factor correction. It is
especially designed for LED lighting system. DW8551 controls the LED current accurately without using an opto-coupler, which can significantly simplify the design of LED lighting system. Utilizing an on-chip multiplier, DW8551 achieves high power factor over wide line and load ranges. The multi-protection function largely enhances the safety and the reliability of system including: over voltage protection, short circuit protection, LED open protection, cycle-by-cycle current limit, VCC UVLO 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