IS32LT3959-ZLA3-TR

Overview

The IS32LT3959-ZLA3-TR is a single-channel LED lighting driver IC designed for local dimming applications. It features a 24x4 matrix LED driver architecture housed in an eTQFP48 package (7mm x 7mm). The device supports Boost, Buck, and Buck-Boost topologies with a maximum supply voltage of 55V and a minimum of 4.5V. It delivers an output current of 45 mA and operates within a frequency range of 360 kHz to 440 kHz. Key electrical parameters include a maximum power dissipation of 3.99 W and a maximum supply current of 5 mA. It supports PWM dimming and functions reliably between -40°C and +150°C.

Feature Summary

• Supports multiple DC-DC topologies including Boost, Buck, and Buck-Boost for flexible LED drive configurations.
• Integrates a 24x4 matrix LED driver architecture suitable for local dimming control schemes.
• Features PWM dimming capability for precise brightness adjustment.
• Designed for automotive-grade reliability with extended temperature operation.

Applications

• Local dimming controllers in automotive display systems
• High-voltage LED lighting drivers requiring multi-topology support
• Automotive interior and exterior illumination modules

Procurement Notes

Verify the specific suffix ZLA3-TR corresponds to the required tape-and-reel packaging configuration. Confirm that the eTQFP48 package dimensions align with your PCB footprint requirements. Ensure the 55V maximum supply voltage rating meets your system's input specifications. Check for AEC-Q100 qualification status if automotive compliance is mandatory for your design.

Selection Notes

Select this component when a single-channel driver with integrated matrix addressing is required for local dimming. The availability of Buck, Boost, and Buck-Boost topologies allows adaptation to various LED string voltages. Consider the 45 mA output current limit and 3.99 W power dissipation for thermal management planning. The wide operating temperature range suits harsh automotive environments.

Part Context

This part belongs to Lumissil's IS32LT series of LED lighting drivers, which are optimized for automotive applications. The series emphasizes high reliability and integration for complex lighting control tasks. The IS32LT3959 specifically targets local dimming needs where individual LED matrix control is necessary for contrast enhancement.

Replacement Considerations

Check for direct substitutes within the IS32LT3958 or IS32LT3961 families if pin compatibility is critical. Verify that alternative parts support the same Boost/Buck/Buck-Boost topology options. Ensure replacement components meet the same AEC-Q100 automotive grade standards and temperature ranges.

FAQ

What DC-DC topologies does the IS32LT3959 support?

The IS32LT3959 supports Boost, Buck, and Buck-Boost topologies, allowing flexibility in driving different LED load configurations.

What is the maximum supply voltage for this device?

The maximum supply voltage for the IS32LT3959 is 55V.

Is the IS32LT3959 qualified for automotive applications?

Yes, the IS32LT3959 is AEC-Q100 qualified for automotive use.