【应用】车规级肖特基二极管SK84-AQ用于新能源汽车电机控制器，最大正向平均电流可达8A

时间： 2023-06-29 来源：世强

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新能源汽车中，电机控制器是用于控制电动汽车驱动电机运行的关键设备。它负责监测和调整电机的电流、电压、速度和转矩等参数，以实现对电机的精确控制。它能够实时监测电机的运行状态，包括电流、电压、温度等参数，并根据这些参数进行智能控制，保证电机的安全运行。其次，电机控制器具备高效的能量转换能力，能够将电池储存的电能转换为电机的机械能，提供动力给汽车。此外，它还能实现电机的启动、加速、制动和回馈能量等功能。

在该系统中，通常会设计辅助电源电路给各芯片提供供电方案，本文介绍DIOTEC 车规级肖特基二极管 SK84-AQ在boost电路中的应用:

以如下BOOST电路为例：

输出整流二极管需具有正向压降低、正向平均电流大，此外，结温和存储温度范围等也需满足恶劣的环境温度需求。

SK84-AQ主要参数如下：

由上可知，SK84-AQ反向峰值电压40V，而辅助电源供电源头一般取自汽车12V低压电池系统，电压范围完全可覆盖；最大正向平均电流可达8A，满足大功率输出DCDC设计中的整流二极管需求；正向压降小于0.5V，具有低功率损耗，高效率的特点；DO-214AB小型化封装更有利于设计布局；结温和存储温度范围为-50℃~150℃，可满足恶劣的环境温度下的应用。

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