A8501KLPTR-T

Overview

The A8501KLPTR-T is a multi-output WLED/RGB driver designed for medium-size display backlighting. It integrates a constant-frequency, current-mode boost converter with an internal power switch and four independent 100 mA current sinks. The device operates from a single power supply ranging from 6.8 V to 21 V and withstands transient input voltages up to 40 V. LED channels can be tied together to achieve a combined sink capability of up to 400 mA. The component is housed in a 28-pin TSSOP EP package.

Feature Summary

• Integrates a current-mode boost converter with four individual 100 mA current sinks
• Supports channel combination for increased total sink current capacity
• Includes extensive fault mode protection schemes
• Features thermal derating capabilities

Applications

• OEM in-cabin telematics systems
• Aftermarket in-cabin telematics systems
• Consumer LCD display backlighting
• Industrial LCD display backlighting

Procurement Notes

Verify the specific suffix KLPTR-T against official Allegro MicroSystems documentation to confirm package type, tape-and-reel specifications, and automotive qualification status. Ensure compatibility with system voltage requirements and thermal management designs before procurement.

Selection Notes

Select this component for applications requiring multiple LED strings driven by a single IC. Consider the integrated boost converter for voltage step-up needs and the ability to combine channels for higher current loads. Evaluate the operating voltage range against the system's power supply characteristics.

Part Context

The A8501 belongs to Allegro MicroSystems' portfolio of multi-channel LED drivers. It is specifically engineered for automotive and industrial display backlighting applications where reliability and compact integration are critical. The device simplifies design by combining power conversion and regulation functions.

Replacement Considerations

Consult official Allegro MicroSystems substitution guides for verified alternatives. Generic cross-references may not match the specific electrical characteristics or package dimensions required for the application.

FAQ

Can the current sinks be combined?

Yes, the LED channels can be tied together to achieve a total sink capability of up to 400 mA.

What is the maximum transient voltage the device can withstand?

The device can withstand transient input voltages as high as 40 V.