BD17910STU

Overview

The BD17910STU is a high-voltage linear LED driver manufactured by onsemi, designed for automotive exterior lighting applications. It integrates a constant current sink capable of driving multiple LEDs in series with a maximum output voltage of 65V. The device features an internal reference and error amplifier to maintain precise current regulation across varying load conditions. It supports PWM dimming for brightness control and includes thermal shutdown protection to ensure reliability under fault conditions.

Feature Summary

• Integrates high-side switch and constant current regulation for direct LED drive
• Supports wide input voltage range suitable for automotive battery systems
• Includes thermal shutdown and over-current protection mechanisms

Applications

• Automotive headlamp modules
• Fog lamp drivers
• Daytime running light circuits

Procurement Notes

Verify the specific suffix STU against the manufacturer's official datasheet to confirm package type and tape-and-reel specifications. Ensure the component meets the required automotive qualification standards such as AEC-Q100 for the target application environment. Cross-reference the ordering code with the latest production status to avoid obsolete or end-of-life variants.

Selection Notes

Select this component when designing single-LED or low-channel count automotive lighting circuits requiring high voltage compliance. Compare total system cost against multi-channel solutions if higher channel counts are needed. Evaluate thermal performance requirements based on the expected ambient temperature and PCB copper area available for heat dissipation during continuous operation.

Part Context

This part belongs to onsemi's automotive-grade LED driver portfolio, specifically targeting exterior lighting systems. It complements lower-voltage drivers by offering higher output capability, reducing the need for external boost converters in certain headlamp designs. The family emphasizes robustness and simplicity for critical safety lighting functions.

Replacement Considerations

Check for pin-compatible alternatives within the same product line that may offer updated packaging or enhanced thermal characteristics. Verify functional equivalence regarding dimming interface compatibility and current accuracy before substituting.