A80603KESJSR-1

Overview

The A80603KESJSR-1 is a multi-output LED driver IC from Allegro MicroSystems, designed for automotive applications. It integrates a current-mode boost converter with an internal power switch and four independent LED drivers. The device supports Boost and SEPIC topologies, accommodating wide input voltage ranges from 4.5 V to 40 V. It features an adjustable switching frequency between 260 kHz and 2.3 MHz, delivering up to 120 mA output current per channel. The operating junction temperature range spans from -40°C to +125°C, housed in a 24-pin QFN package.

Feature Summary

• Integrates a current-mode boost converter with four independent LED driver channels
• Supports both Boost and SEPIC topologies for flexible LED string configurations
• Features analog and PWM dimming capabilities for precise brightness control
• Includes comprehensive protection mechanisms against over-voltage, over-current, and thermal faults

Applications

• Automotive exterior lighting systems
• LED headlamp modules
• Tail lamp and brake light assemblies
• Daytime running light circuits

Procurement Notes

Verify the complete part number including suffixes such as 'SR' for reel packaging and '-1' for specific variants. Confirm RoHS compliance status through official datasheets or manufacturer declarations. Ensure the selected package matches the required PCB footprint, specifically the 24-WFQFN exposed pad configuration. Cross-reference electrical specifications with application requirements before finalizing procurement orders.

Selection Notes

Select this component when designing automotive LED systems requiring integrated boost conversion and multi-channel drive. Consider the 40 V maximum input voltage limit and 120 mA per-channel current capability. Evaluate the need for SEPIC topology if input voltage may drop below LED forward voltage. Ensure thermal management strategies align with the -40°C to +125°C operating range specified for automotive environments.

Part Context

The A80603 series belongs to Allegro's portfolio of automotive-grade LED drivers. These devices are engineered to simplify high-side LED driving in vehicles by combining power stage and control logic. The A80603KESJSR-1 variant specifically targets applications needing robust fault protection and dimming flexibility within a compact QFN form factor suitable for space-constrained automotive PCB layouts.

Replacement Considerations

The A80603KESJSR is a closely related variant within the same family. Verify functional equivalence regarding pinout and electrical parameters before substitution. Check if the '-1' suffix denotes specific manufacturing revisions or parameter tolerances that impact system performance. Consult official Allegro documentation for detailed cross-reference information.