ZXLD1371QESTTC

Overview

The ZXLD1371QESTTC is an automotive-grade LED driver controller IC from Diodes Incorporated, designed to drive external MOSFETs for high-current LEDs. It supports Buck, Boost, and Buck-Boost topologies with a single current sense resistor. The device operates within a 5 V to 60 V input range and features a switching frequency up to 1 MHz. It provides 2% output current accuracy and includes PWM dimming capabilities. Packaged in a TSSOP-EP-16, it meets AEC-Q100 Grade 1 standards for -40°C to +125°C operation.

Feature Summary

• Multi-topology control supporting Buck, Boost, and Buck-Boost configurations using a single current sense resistor
• High precision LED control with 2% output current accuracy across all operating modes
• Integrated fault diagnosis with dedicated flag and multi-level status pins for detailed error reporting
• Supports independent 1000:1 PWM dimming and analog dimming for precise brightness control

Applications

• Automotive exterior lighting systems requiring high voltage headroom
• LED modules driven by power rails subject to transient voltage spikes
• Applications utilizing external MOSFETs for high-current LED driving
• Systems requiring flexible topology selection based on input-output voltage relationships

Procurement Notes

Verify the complete part number including the Q suffix to ensure AEC-Q100 automotive qualification. Confirm the TSSOP-EP-16 package variant matches your PCB footprint requirements. Check datasheet specifications for thermal performance under expected load conditions. Ensure compatibility with external MOSFET gate drive requirements. Validate that the 1 MHz switching frequency aligns with your EMI constraints.

Selection Notes

Select this component when designing circuits with input voltages ranging from 5 V to 60 V. It is suitable for applications needing flexible topology adaptation without changing components. Consider its use where high current accuracy is critical for consistent LED brightness. Evaluate its suitability for automotive environments due to its qualified temperature range and reliability standards. Assess if the integrated fault detection simplifies system monitoring needs.

Part Context

This device belongs to the ZXLD137x family of LED drivers. It shares similarities with the ZXLD1370 but offers a lower minimum operating voltage of 5.0 V. This feature allows operation on power rails susceptible to transients. The family focuses on high-accuracy control for automotive and industrial LED applications.

Replacement Considerations

The ZXLD1370 is a related model within the same family. Verify if the higher minimum input voltage of the ZXLD1370 meets your specific circuit requirements. Both devices share similar functionality but differ in input voltage tolerance.