Monday, May 20, 2024

High-Side Switch For Automotive Power Management

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With its robust features, comprehensive protection mechanisms, and reliability, it promises to redefine the standards of high-side power switches in automotive applications.

HMI has unveiled its latest innovation: the HL8518. This single-chip 80 mΩ high-side switch is tailored for automotive applications requiring a robust power switch solution for low-wattage lamp, high-side relays and valves, and general resistive, inductive, and capacitive loads. With the switch users can expect enhanced system safety, comprehensive diagnostic capabilities, and full protection mechanisms.

The key features include:

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  • Incorporates 80 mΩ (typical) Rds(on) power FET 
  • Efficient power delivery
  • Provides two variants: Version A: Offers digital diagnosis via the FLTn pin, Version B: Provides current output from the ISNS pin
  • Both variants prioritize fault detection and system integrity, crucial for automotive environments

It offers flexibility through adjustable current limits and comprehensive protection mechanisms. An internal charge pump facilitates efficient gate control, ensuring optimal performance. The device actively regulates output current, prioritizing system stability and safety. In instances of increased power consumption, thermal shutdown activates, safeguarding the device and preventing overheating.

David Nam, CEO of HMI, underscores the paramount importance of reliability in automotive applications, especially in challenging scenarios like short-circuit conditions. It not only meets but exceeds industry standards, earning Class-A certification under AEC-Q100-012 for its exceptional sustained short-circuit performance. With a track record of enduring 1 million short circuits to ground, it demonstrates unmatched reliability and durability, ensuring uninterrupted operation in the most demanding automotive environments.

Akanksha Gaur
Akanksha Gaur
Akanksha Sondhi Gaur is a journalist at EFY. She has a German patent and brings a robust blend of 7 years of industrial & academic prowess to the table. Passionate about electronics, she has penned numerous research papers showcasing her expertise and keen insight.


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