LED Drivers
Automotive-Grade, Constant-Current 2.0 A PWM Dimmable Synchronous Buck LED Driver
ALT80800
These parts are in production but have been determined to be NOT FOR NEW DESIGN. The ALT80800 is a compact, high-efficiency, low EMI LED driver for automotive lighting, functioning as a synchronous buck switching regulator. It provides constant-current output for high-power LEDs, integrating N-channel DMOS switches, and features user-selectable current with automatic voltage adjustment.
Product Details
Product Details
Top Features
- 55Vin rating (60V abs max) – Can be used on traditional 12-V automotive, and 24-V trucks, and systems using a pre-boost supply followed by the ALT80800 to drive a high number of LEDs
- Integrated FETs – No need for external FET(s) or Diode as part of the buck conversion, and higher efficiency
- Switching frequency dithering for EMI reduction – pass OEM requirements and minimize associated components
- 5V Vcc can be used to source up to 14mA as a local rail (e.g., power a small uC) – potentially eliminate an LDO
- PWM and Analog dimming options, including control for NTC temperature foldback or LED binning
- Adjustable LED open fault mask setting for low VIN operation (dropout mode)
Target Application
