Os primeiros controladores hot-swap e ORing integrados em automóveis do mercado

The market's first automotive-integrated hot-swap and ORing controllers

The STMicroelectronics STPM801 is the market's first automotive-qualified ideal diode and hot-swap integrated controller on the market, introduced for functional safety applications.

The ideal diode controller drives an external MOSFET that replaces a conventionally used Schottky diode for reverse input protection and output voltage retention. The reduced voltage drop across the MOSFET reduces power dissipation during normal operation compared to the forward voltage of the Schottky diode.

When a reverse voltage event occurs, in case of faults such as power supply failure, power outage, or input short circuit, turning off the MOSFET blocks the associated reverse current transients.

The ideal diode controller circuit also provides power ORing, to switch between a main battery and a backup battery to ensure uninterrupted supply of safety-critical equipment such as autonomous driving and advanced driver assistance systems (ADAS).

The integrated hot-swap controller drives a second external N-channel MOSFET to protect loads during hot-swap events. A soft-start function controls the turn-on transient of this second MOSFET by charging a capacitor of known value connected to its gate at constant current to avoid high inrush currents. The overvoltage and undervoltage pins cut off the output voltage whenever the input voltage is not within specified limits.

The STPM801 also includes protection and monitoring features suitable for applications that meet functional safety requirements for systems up to Automotive Safety Integrity Level (ASIL) D in accordance with ISO 26262. The features are packaged in a VFQFN-32 area 5mm x 5mm, saving PCB space. and minimizing the demand for external components.

Operating with a supply voltage of 4V-65V and a quiescent current of 25µA, the STPM801 resists automotive electrical hazards and minimizes battery consumption when the vehicle is turned off. It is used in zonal/body ECUs, ADAS ECUs, high-performance computing ECUs, infotainment ECUs, redundant power supply systems, and dual battery systems.

Conteúdo Relacionado

O novo VIPerGaN50 da STMicroelectronics simplifica a construção de...
A network of sensors is embedded in every vehicle,...
The motor controller is one of the most important...
ESP32-CAM is a compact camera module that combines the...
A evolução dos padrões USB foi fundamental para moldar...
A SCHURTER anuncia um aprimoramento para sua conhecida série...
A Sealevel Systems anuncia o lançamento da Interface Serial...
A STMicroelectronics introduziu Diodos retificadores Schottky de trincheira de...
Determinar uma localização precisa é necessário em várias indústrias...
A Samsung Electronics, fornecedora de tecnologia de memória avançada,...
O mercado embarcado tem uma necessidade de soluções de...
You have probably come across the term ' drag...
You probably have a support insulator if you've noticed...
You've probably seen stand an insulator sit on power...
You've probably seen shackle insulators enthroned on electricity poles,...
You have probably experienced situations where controlling a circuit...
Back to blog

Leave a comment

Please note, comments need to be approved before they are published.