LED7708TR

Overview

The LED7708TR is a 16-channel LED driver with an integrated boost controller and 4-wire serial interface. It operates from a single low-voltage rail, featuring sixteen current generators rated at 85 mA per channel with ±2% accuracy. The device supports selectable 12-bit or 16-bit grayscale brightness control via independent PWM on each channel. It includes adaptive output voltage regulation for high efficiency, external synchronization pins for noise reduction, and comprehensive protection mechanisms including overvoltage, overcurrent, thermal shutdown, and open/short LED fault detection.

Feature Summary

• Integrates a boost controller with adaptive output voltage regulation to optimize overall system efficiency based on specific LED requirements.
• Provides sixteen independent channels with programmable current capability and precise channel-to-channel matching for uniform illumination.
• Supports selectable 12-bit or 16-bit grayscale brightness control allowing independent pulse-width modulation on each channel.
• Includes dedicated pins for external synchronization with other devices in master or slave configurations to minimize noise.

Applications

• Automotive interior lighting systems
• LED backlighting for displays
• Ambient lighting applications
• High-efficiency LED string drivers

Procurement Notes

Verify the exact suffix against the manufacturer's official datasheet to confirm package type and tape/reel specifications. Ensure compatibility with your board layout regarding the VFQFPN-64 package dimensions. Confirm that the operating temperature range meets your environmental requirements before finalizing procurement.

Selection Notes

Select this component when designing systems requiring multiple independently controlled LED channels from a single supply voltage. It is suitable for applications needing high current accuracy and efficient power management through integrated boost regulation. Consider the 4-wire serial interface speed and pin count relative to your microcontroller resources.

Part Context

This part belongs to STMicroelectronics' LED driver family, specifically designed for automotive and general lighting applications. It integrates power stage and control logic into a single solution, reducing external component count compared to discrete designs. The device is part of a broader portfolio addressing various LED driving needs with different channel counts and interfaces.

Replacement Considerations

Consult official substitution lists for direct replacements. Verify pinout compatibility and electrical parameters if considering alternative manufacturers. Ensure any substitute maintains the required channel count and current capabilities for your specific design.

FAQ

How does the LED7708 handle LED faults?

The device detects and manages open-LED and shorted-LED faults, offering configurable fault-management options to suit various application needs.

What is the maximum switching frequency?

The internal boost controller supports a switching frequency range from 250 kHz to 1 MHz.