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[原创]ST L9026可配置多路汽车继电器驱动方案

关键词:电源管理 继电器驱动器 汽车电子 ST L9026

时间:2021-02-18 15:53:02       来源:中电网

ST公司的L9026是可配置8路继电器驱动器,具有2路固定HS驱动器和6路可配置的HS/LS驱动器,设计用于汽车应用(LED和继电器),和电阻,电感和电容负载兼容.器件提供先进的诊断和保护功能如对地(GND)短路,开路,过流和超温检测.8个输出通路可由SPI或多或2个专用并行输入来驱动.器件还具有跛行功能特性,特殊故障条件下如SPI故障,微故障或电源UV时允许采用2个选择驱动器.器件满足AEC-Q100 资质,起动能力可低至VBATT=3V,2个并行输入引脚具有输出映射功能.数字电源电压和3.3V与5V微控制器兼容,VBATT有反向电池保护,具有LED模式, 灯泡涌入模式(BIM)驱动灯和电负载,两个内部PWM发生器用于微控制器卸载.器件具有非常低的静态电流(和IDLE引脚使用).菊花链和SPI兼容,也和8位SPI器件兼容,两种封装选择:HTSSOP24和VFQFPN32.器件完全和ISO26262兼容,也适合用于ASIL-B系统.主要用在汽车电子.本文介绍了L9026主要特性,框图和应用电路,评估板EVAL-L9026-YO主要特性,框图,电路图和PCB设计图.

 

The L9026 is an eight-channel IC, with 2 fixed HS drivers and 6 configurable HS/LSdrivers designed for Automotive applications (LEDs and Relays) and compatiblewith resistive, inductive and capacitive loads. The device offers advanced diagnosticand protection functionalities such as: short to GND, open load, overcurrent, overtemperature

detections. The 8 output channels can be either driven by SPI or by2 dedicated parallel inputs. Limp home functionality is also featured, which allowsusing 2 selected drivers in particular faulty conditions, such as SPI fault, micro faultor supply UV. Daisy chain compatible even with 8bit SPI is available. The device isable to guarantee ..

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