基于MC33937A混合和电动汽车逆变器参考设计

nxp公司的MC33937A是用于三相马达控制和相关应用的FET预驱动器，包括三个高边FT预驱动器和三个低边FET预驱动器，满足AEC-Q100 grade 1规范，工作电压从6.0V到58V，栅极驱动电流1.0A到2.5A，主要用在汽车电子系统，包括冷却风扇，水泵，燃油泵，引擎控制和马达控制，执行器控制器以及电液与电动助力转向。本文介绍了MC33937A主要特性，简化框图，功能框图，应用框图以及评估板KIT33937AEKEVBE主要特性，电路图，材料清单和PCB设计图。

The 33937A is a field effect transistor （FET） pre-drivers designed for three phase motor control and similar applications. It meets the stringent requirements of automotive applications and is fully AEC-Q100 grade 1 qualified. The IC contains three high-side FET pre-drivers and three low-side FET pre-drivers. Three external bootstrap capacitors provide gate charge to the high-side FETs. The IC interfaces to a MCU via six direct input control signals， an SPI port for device setup and asynchronous reset， enable and interrupt signals. Both 5.0 and 3.0 V logic level inputs are accepted and 5.0 V logic level outputs are provided. The integrated circuit （IC） uses SMARTMOS technology。

MC33937A主要特性：

•Extended operating range from 6.0 V to 58 V covers 12 V and 42 V systems

•Gate drive capability of 1.0 A to 2.5 A

•Fully specified from 8.0 V to 40 V covers 12 and 24 V automotive systems

•Protection against reverse charge injection from CGD and CGS of external FETs

•Includes a charge pump to support full FET drive at low battery voltages

•Dead time is programmable via the SPI port

•Simultaneous output capability enabled via safe SPI command

•AEC-Q100 grade 1 qualified

MC33937A应用：

Automotive systems

• Cooling fan

• Water pump

• Actuator controls

• Fuel pump

• Electro-hydraulic and electric power steering

• Engine control

• Motor control

图1.MC33937A简化框图

图2.MC33937A简化应用框图

图3.MC33937A功能框图

图4.MC33937A采用电荷泵（+12V电池系统）的应用框图

图5.MC33937A+42V电池系统的高压应用框图

评估板KIT33937AEKEVBE

This Evaluation Kit features the NXP® MC33937， a Field Effect Transistor （FET） pre-driver designed for 3-phase motor control and similar applications.

The integrated circuit （IC） uses SMARTMOS® technology and contains three high side FET pre-drivers and three low side FET pre-drivers. The IC interfaces to a MCU via six direct input control signals， an SPI port for device setup and asynchronous reset， enable and interrupt signals. Both 5.0V and 3.0V logic level inputs are accepted and 5.0V logic level outputs are provided.

评估板KIT33937AEKEVBE主要特性：

Fully specified from 8.0 to 40 V covers 12 and 24 V automotive systems

Extended operating range from 6.0 to 58 V covers 12 and 42 V systems

Greater than 1.0 A gate drive capability with protection

Protection against reverse charge injection from CGD and CGS of external FETs

Includes a charge pump to support full FET drive at low battery voltages

Deadtime is programmable via the SPI port

Simultaneous output capability enabled via safe SPI command

NXP®KIT33937AEK Evaluation kit product image

图6.评估板KIT33937AEKEVBE外形图

评估板KIT33937AEKEVBE包括：

KIT33937AEKEVBE Hardware

Quick Reference Guide

评估板KIT33937AEKEVBE目标应用：

Automotive

Hybrid and Electric Vehicle Power Inverter

图7.评估板KIT33937AEKEVBE电路图（1）：电源

图8.评估板KIT33937AEKEVBE电路图（2）：UNI-3连接器

图9.评估板KIT33937AEKEVBE电路图（3）：33937A驱动器

图10.评估板KIT33937AEKEVBE电路图（4）：DC总线电压和电流检测

图11.评估板KIT33937AEKEVBE电路图（5）：3相N-MOS桥

评估板KIT33937AEKEVBE材料清单：

图12.评估板KIT33937AEKEVBE PCB设计图（1）：顶层

图13.评估板KIT33937AEKEVBE PCB设计图（2）：底层

图14.评估板KIT33937AEKEVBE PCB设计图（3）：丝印层