ALT80802KEJJTR

Overview

The ALT80802KEJJTR is a single-channel asynchronous buck or buck-boost LED driver IC from Allegro MicroSystems. It supports an input voltage range of 3.8 V to 50 V and delivers up to 2 A output current with a maximum output voltage of 20 V. The device operates at a switching frequency between 360 kHz and 2.2 MHz. It features PWM and analog dimming capabilities, is housed in a 10-WFDFN package, and is qualified to AEC-Q100 standards for automotive applications.

Feature Summary

• Supports both buck and buck-boost topologies for flexible LED string configurations
• Integrates internal power switches for compact design
• Enables precise brightness control via PWM and analog dimming inputs
• Qualified for automotive environments under AEC-Q100 standards

Applications

• Automotive exterior lighting systems
• Interior vehicle illumination modules
• General LED lighting drivers requiring buck or boost regulation

Procurement Notes

Verify the specific suffix KEJJTR against the manufacturer's latest datasheet to confirm package type and tape/reel specifications. Ensure compatibility with your system's thermal management requirements given the DFN package. Confirm that the intended application meets the AEC-Q100 qualification criteria if used in automotive contexts. Cross-reference pinouts with official documentation before PCB layout finalization.

Selection Notes

Select this component when designing circuits that require either step-down or step-up voltage conversion for LED strings within a 3.8 V to 50 V input range. It is suitable for applications needing high-frequency operation up to 2.2 MHz to minimize passive component size. Choose this part over the ALT80800 if buck-boost capability is required rather than buck-only topology.

Part Context

This device belongs to the ALT808 series of high-frequency switching regulators designed for LED lighting. Unlike the ALT80800 which is buck-only, the ALT80802 offers versatile buck-boost functionality. It shares similar dimming features but differs in topology and packaging compared to other series members like the ALT80804.

Replacement Considerations

The ALT80800KLPATR serves as a related alternative but is limited to buck topology only. Verify if the application strictly requires buck-boost capability; if not, the ALT80800 may be considered. No direct pin-to-pin substitutes are documented in the provided data.