Diodes Incorporated AL8862 Buck LED Driver
Diodes Incorporated AL8862 Buck LED Driver is a step-down DC-DC converter that drives LEDs with a constant current. The Diodes Incorporated AL8862 operates with an input supply voltage from 5V to 60V, providing an externally adjustable output current of up to 1A. Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminating the need for ballast resistors. The AL8862 switches at a frequency up to 1MHz, allowing the use of smaller size external components and minimizing the required PCB size.
The AL8862 integrates a low RDS(ON) power switch and a high-side output current sensing circuit. The maximum output current of AL8862 is set via an external resistor connected between the VIN and SET input pins. Dimming is achieved by applying a DC voltage or a PWM signal at the CTRL input pin.
The AL8862 is available in a thermally enhanced SO-8EP package, with a -40°C to +105°C operating ambient temperature range.
Features
- 5V to 60V wide input voltage range
- Output current up to 1A
- Up to 1MHz switching frequency
- Internal 60V NDMOS switch
- Typical 4% output current accuracy
- Single Pin for On/Off and Brightness Control by DC voltage or PWM signal
- High efficiency (Up to 97%)
- LED short-circuit protection
- Inherent open-circuit-led protection
- Current-sense resistor short-circuit protection
- Over-temperature shutdown
- -40°C to +105°C operating temperature range
- Thermally enhanced SO-8EP package
- Lead-free and fully RoHS compliant
- Halogen and antimony-free "Green" device
Applications
- Commercial and industrial lighting
- Appliances interior lighting
- Architecture detail lighting
- External driver with multiple channels and smart lighting
Additional Resources
Block Diagram
Typical Application Circuit
發佈日期: 2019-12-30
| 更新日期: 2023-08-14