A8501ELPTR-T

Overview

The A8501ELPTR-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 supply voltage ranging from 6.8 V to 21 V and withstands transient input voltages up to 40 V. Individual 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 internal power switch
• Provides four independent 100 mA current sink channels
• Supports channel combination for increased total sink current
• Includes extensive fault mode protection schemes

Applications

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

Procurement Notes

Verify the specific ordering suffix against official Allegro MicroSystems documentation to confirm pinout, thermal pad configuration, and tape-and-reel specifications. Ensure the selected variant matches the required automotive or industrial qualification standards. Cross-reference the part number with the manufacturer's latest datasheet to validate compatibility with system voltage requirements and control interfaces before procurement.

Selection Notes

Select this component when designing backlight drivers for medium-sized displays requiring multiple independent color channels. The integrated boost converter simplifies design by eliminating external switching components. Consider channel paralleling capabilities if higher individual LED currents are needed. Verify that the operating input voltage range aligns with the vehicle or system power bus characteristics.

Part Context

The A8501 belongs to Allegro MicroSystems' portfolio of multi-channel LED drivers tailored for automotive and industrial display applications. It addresses the need for driving numerous LEDs in series and parallel configurations within compact form factors. The device supports complex lighting architectures by combining power conversion and precise current regulation in a single integrated circuit.

FAQ

Can the LED channels be combined for higher current?

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

What type of converter is integrated in the A8501?

The A8501 integrates a constant-frequency, current-mode boost converter with an internal power switch.