IS32LT3141A-ZLA3-TR

Overview

The IS32LT3141A-ZLA3-TR is an automotive-grade, single-channel linear LED driver IC from Lumissil Microsystems. It provides a programmable constant current output of up to 450mA with high-side configuration. The device features a 1-Wire serial bus interface for control and includes single LED detection capabilities. It operates within a wide input voltage range of 4.5V to 40V and maintains ±8% current accuracy over the temperature range of -40°C to +150°C. The unit is housed in a thermally enhanced eTSSOP-14 package.

Feature Summary

• Integrates a 1-Wire serial bus interface for simplified communication and control
• Includes dedicated circuitry for single LED short detection and fault reporting
• Features high-side programmable current regulation with external resistor setting
• Supports PWM dimming and power supply modulation (PSM) methods

Applications

• Automotive interior lighting systems
• Automotive exterior lighting applications
• General LED string driving in 12V automotive environments

Procurement Notes

Verify the specific suffix ZLA3 against the manufacturer's latest datasheet to confirm package type and tape/reel specifications. Ensure the design supports the 1-Wire protocol requirements. Confirm thermal management strategies are adequate for the eTSSOP-14 package given the 450mA drive capability and potential power dissipation under load conditions.

Selection Notes

Select this component when a single-channel solution with integrated fault detection is required. The 1-Wire interface reduces pin count compared to parallel interfaces. Consider the ±8% accuracy specification for precision lighting needs. Evaluate the low dropout voltage characteristic for efficiency in low headroom applications.

Part Context

This part belongs to the IS32LT series of automotive-grade linear LED drivers designed by Lumissil Microsystems. The series targets robust operation in harsh automotive environments, offering various channel counts and interface options. The IS32LT3141A specifically focuses on single-channel applications requiring serial communication and diagnostic feedback.

Replacement Considerations

Check for direct substitutes within the IS32LT family that offer similar channel counts and interface types. Verify compatibility of the eTSSOP-14 footprint if replacing with other packages. Ensure replacement parts support the same 1-Wire protocol and 450mA current rating.