[原创]Infineon 2ED4820-EM 48V智能高边MOSFET栅极驱动器方案

Infineon公司的2ED4820-EM是用于48V汽车应用的栅极驱动器,具有功能强大的栅极输出,能驱动并联的多个MOSFET,以最大限度降低导通损耗.由于它的两种栅极输出,它支持背对背的配置,共源和共漏两种结构.在共源极配置,一个栅极输出能用来预充电大容性负载. 2ED4820-EM产生栅极输出的电源,它是基于集成具有外接泵和箱式电容的一级电荷泵.器件具有SPI接口,用于容易配置,诊断和控制.器件的电源电压从20V到70V,具有两个独立的高边栅极驱动器输出,1A下拉和0.3A上拉用于快速开关的接通/关断.在睡眠模式低电源电流BAT_Q小于5 μA.器件具有以下的保护特性:电源欠压和过压检测并具有可配置重器计时器,电荷欠压检测,栅极到源极欠压检测,可配置漏极到源极过压检测,可配置过流检测以及内部超温告警和保护.主要用在48V电池保护开关,用于DC/DC转换器,马达控制单元等的48V输入保护,48V汽车继电器和保险丝替代品.本文介绍了2ED4820-EM主要特性,框图, 48V电池主开关应用框图和菊花链连接图,以及评估板2ED4820-EM EB2 2HSV48主要特性,电路图,材料清单和PCB设计图.

2ED4820-EM is a gate driver designed for high current 48 V automotive applications, with powerful gate outputs to drive many MOSFETs in parallel in order to minimize the conduction losses. It supports the back-to-back configuration, both common source and common drain structures, thanks to its two gate outputs.

In common source configuration, one gate output can be used to pre-charge highly capacitive loads.

2ED4820-EM generates the supply for the gate outputs based on an integrated one-stage charge pump with external pump and tank capacitors.2ED4820-EM comes with an SPI interface, for easy configuration, diagnosis and control.

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