描述 Description

2A Peak, 44V Multi-Topology LED Driver

DW8521 is a current mode monolithic LED driver. The LED current can be controlled with an analog input voltage. With high-side LED current sensing, DW8521 can be configured as buck, boost or buck-boost topology to serve different LED driver need. The integrated 44V/2A N-Channel MOSFETs ensures high efficiency operation. At light loads, DW8521 operates in low frequency to maintain high efficiency and low output ripple. The overvoltage lockout protection on SW pin protects DW8521 from open LED fault. DW8521 also has thermal protection at 140oC. DW8521 is available in a 6-pin SOT23-6 and a 8-pin ESOP8 package, which provides a compact solution with minimal external components.

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