A1569KLJTR-T

Overview

The A1569KLJTR-T is an automotive-grade LED driver IC from Allegro MicroSystems, featuring a fully integrated micro-power Hall effect switch. It operates within a supply voltage range of 7 V to 24 V and delivers a linear output current of up to 150 mA per channel. The device utilizes an 8-SOIC-EP package with exposed pad for surface mount installation. It supports PWM dimming and includes internal protections against output short-to-ground and thermal overload. The component is qualified to AEC-Q100 standards and functions reliably across an extended temperature range from -40°C to +125°C.

Feature Summary

• Integrates a non-contact Hall effect switch with a linear LED driver in a single IC
• Provides high magnetic sensitivity to accommodate various mechanical configurations and air gaps
• Supports adjustable soft-start/stop timing via an external capacitor for aesthetic lighting effects
• Includes limited voltage slew rate output to suppress electrical transients

Applications

• Automotive interior and auxiliary lighting systems
• White home appliance indicator and status lighting
• Consumer electronics illumination
• Marine and recreational vehicle cabin lighting

Procurement Notes

Verify the specific suffix configuration against the manufacturer's official datasheet to ensure compatibility with required packaging options such as cut tape or reel quantities. Confirm that the selected variant meets the necessary AEC-Q100 qualification requirements for the intended automotive application environment. Cross-reference the pinout and thermal pad specifications with the target PCB layout design to guarantee proper electrical connectivity and heat dissipation performance during integration.

Selection Notes

Select this component when designing compact, contactless lighting controls that require minimal external bill of materials. The integrated Hall sensor eliminates the need for mechanical switches, enhancing reliability in sealed environments. Consider the 150 mA drive capability for single-string LED applications where linear regulation suffices. Evaluate the external capacitor requirement for tailoring turn-on/off transition speeds to match specific aesthetic design goals for the end product.

Part Context

This part belongs to the A1569 series, representing Allegro MicroSystems' first fully integrated magnetic drive lighting solution. It combines a high-sensitivity Hall effect switch with a low-noise LED driver to replace traditional mechanical switches. The series targets applications requiring robust, silent, and non-contact activation methods while maintaining a small form factor suitable for modern electronic assemblies in vehicles and appliances.

Replacement Considerations

ASEK1569KLJ-T-DK serves as the associated evaluation board for development purposes.