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AL8843 High Power 40 V Buck LED Driver
Diodes' AL8843 step-down DC-DC converter provides an externally adjustable output current up to 3 A
Diodes Incorporated's AL8843 is a hysteretic mode DC-DC step-down converter, designed for driving single or multiple series connected LEDs efficiently from a voltage source higher than the LED voltage. The device can operate from an input supply between 4.5 V and 40 V and provide an externally adjustable output current up to 3 A. The AL8843 integrates the power switch and a high-side output current sensing circuit, which uses an external resistor to set the nominal average output current. Dimming can be realized by applying an external control signal to the CTRL pin. The CTRL pin will accept either a DC voltage signal or a PWM signal. AL8843 is available in the thermally enhanced a SO-8EP package.
Features
- Integrated 40 V/0.2 Ω power MOSFET supports LED current up to 3 A
- Requires fewer external components to achieve higher efficiency
- Supports high power applications
- Dimming range from 0% to 100% for PWM dimming
- Broad dimming range capability
- Input voltage range from 4.5 V to 40 V
- Delivers a wide range of input voltages to support a broad spectrum of applications
- Built-in protections against LED short/open, thermal overload (OTP) protections ensure for a reliable system
- Provides a reliable system performance
Applications
- Industrial lighting
- Architectural lighting
- External drivers with multiple channels
AL8843 Buck LED Driver
| Image | Manufacturer Part Number | Description | Internal Switch(s) | Number of Outputs | Voltage - Supply (Min) | Available Quantity | Price | View Details | |
|---|---|---|---|---|---|---|---|---|---|
 |  | AL8843SP-13 | IC LED DRIVER RGLTR PWM 3A 8SO | Yes | 1 | 4.5V | 1031 - Immediate | $12.10 | View Details |
Published: 2018-02-26
South Africa