A8507ELPTR-T

Overview

The A8507ELPTR-T is a multi-output WLED/RGB driver designed for LCD monitor and television backlighting. It integrates a boost controller with an external MOSFET and six internal current sinks, each capable of delivering 80 mA. The device features fixed-frequency current mode control with an integrated gate driver. Key electrical parameters include an adjustable switching frequency range from 250 kHz to 1 MHz and active current sharing between LED strings with ±0.6% accuracy. Protection mechanisms include overvoltage protection (OVP), open or shorted LED string detection, overtemperature shutdown, cycle-by-cycle current limit, and undervoltage lockout.

Feature Summary

• Integrates a constant frequency current mode boost converter with an external MOSFET drive capability
• Provides six individual internal current sinks with high matching accuracy for uniform LED brightness
• Includes comprehensive protection against overvoltage, overtemperature, and LED faults

Applications

• Backlighting for LCD monitors
• Backlighting for televisions
• Multi-string WLED/RGB lighting systems

Procurement Notes

Verify the specific suffix ELPTR-T against official Allegro MicroSystems documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with system voltage requirements and thermal management needs. Confirm that the component meets all necessary automotive or industrial qualification standards required for the target application environment.

Selection Notes

Select this component when designing medium-to-large display backlights requiring precise current matching across multiple LED strings. The integrated boost controller simplifies design by reducing external component count. Consider the TSSOP-24 package with exposed thermal pad for improved heat dissipation in dense PCB layouts compared to standard SOIC packages.

Part Context

The A8507 belongs to Allegro's family of flexible WLED/RGB backlight drivers. It is engineered to replace discrete solutions by combining power conversion and regulation in a single IC. This integration supports efficient power management and reduces board space, making it suitable for modern display applications where size and performance are critical constraints.

Replacement Considerations

Check for direct pin-compatible alternatives within the A850x series if supply chain constraints exist. Verify that any substitute maintains the same current sink configuration and protection features to ensure circuit functionality remains unchanged without redesign.