IS32LT3957A-ZLA3-TR

Overview

The IS32LT3957A-ZLA3-TR is a high-voltage LED lighting controller from Lumissil Microsystems, designed for automotive and industrial applications. It supports SEPIC, Buck, and Boost topologies with a single output channel. The device operates within a supply voltage range of 5V to 75V and features PWM dimming capabilities. Packaged in a 16-pin eTSSOP (4.40mm wide) with an exposed pad, it functions across a temperature range of -40°C to +125°C. This component integrates fault protection mechanisms and is qualified to AEC-Q100 standards for reliability.

Feature Summary

• Supports multiple power converter topologies including SEPIC, Buck, and Boost for flexible LED drive configurations.
• Integrates comprehensive fault protection mechanisms to ensure system safety and reliability.
• Provides precise PWM dimming control for adjustable LED brightness levels.
• Qualified for automotive environments with extended operating temperature ranges.

Applications

• Automotive exterior lighting systems
• High-voltage LED headlamp modules
• Industrial LED lighting fixtures

Procurement Notes

Verify the complete part number including the suffix ZLA3-TR to confirm the specific tape-and-reel packaging and pin configuration. Ensure compatibility with the target PCB footprint for the 16-eTSSOP package. Confirm that the design accounts for the exposed thermal pad requirements for proper heat dissipation and electrical connection. Check current availability status as lead times may vary due to automotive qualification demands.

Selection Notes

Select this controller when a single-channel solution supporting variable input-output voltage relationships via SEPIC or Buck-Boost topologies is required. It is suitable for designs needing integrated fault protection without external discrete components. Consider the 75V maximum supply limit and the specific thermal characteristics of the eTSSOP package. Verify that the PWM dimming frequency range aligns with the application's flicker-free requirements.

Part Context

This component belongs to the IS32LT3957 family of high-voltage LED drivers from Lumissil Microsystems. The family focuses on robust solutions for demanding lighting applications, particularly in the automotive sector where reliability and wide operating ranges are critical. The ZLA3-TR designation indicates the specific package type and reel quantity configuration.

Replacement Considerations

Direct substitutes require matching the 16-eTSSOP package, 75V max supply, and multi-topology support. Cross-reference with other Lumissil IS32LT series parts for pin-compatible alternatives if available. Verify functional equivalence regarding fault reporting and dimming interfaces before substitution.

FAQ

What power topologies does the IS32LT3957A support?

It supports SEPIC, Step-Down (Buck), and Step-Up (Boost) topologies.

Is this component qualified for automotive use?

Yes, it is qualified to AEC-Q100 standards and rated for automotive-grade operation.

What is the maximum supply voltage for this controller?

The maximum supply voltage is 75V.