nxp公司的MC33937A是用于三相馬達控制和相關應用的FET預驅動器，包括三個高邊FT預驅動器和三個低邊FET預驅動器，滿足AEC-Q100 grade 1規范，工作電壓從6.0V到58V，柵極驅動電流1.0A到2.5A，主要用在汽車電子系統，包括冷卻風扇，水泵，燃油泵，引擎控制和馬達控制，執行器控制器以及電液與電動助力轉向。本文介紹了MC33937A主要特性，簡化框圖，功能框圖，應用框圖以及評估板KIT33937AEKEVBE主要特性，電路圖，材料清單和PCB設計圖。

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應用：

Automotive systems

? Cooling fan

? Water pump

? Actuator controls

? Fuel pump

? Electro-hydraulic and electric power steering

? Engine control

? Motor control

圖1.MC33937A簡化框圖

圖2.MC33937A簡化應用框圖

圖3.MC33937A功能框圖

圖4.MC33937A采用電荷泵（+12V電池系統）的應用框圖

圖5.MC33937A+42V電池系統的高壓應用框圖

評估板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.

評估板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

圖6.評估板KIT33937AEKEVBE外形圖

評估板KIT33937AEKEVBE包括：

KIT33937AEKEVBE Hardware

Quick Reference Guide

評估板KIT33937AEKEVBE目標應用：

Automotive

Hybrid and Electric Vehicle Power Inverter

圖7.評估板KIT33937AEKEVBE電路圖（1）：電源

圖8.評估板KIT33937AEKEVBE電路圖（2）：UNI-3連接器

圖9.評估板KIT33937AEKEVBE電路圖（3）：33937A驅動器

圖10.評估板KIT33937AEKEVBE電路圖（4）：DC總線電壓和電流檢測

圖11.評估板KIT33937AEKEVBE電路圖（5）：3相N-MOS橋

評估板KIT33937AEKEVBE材料清單：

圖12.評估板KIT33937AEKEVBE PCB設計圖（1）：頂層

圖13.評估板KIT33937AEKEVBE PCB設計圖（2）：底層

圖14.評估板KIT33937AEKEVBE PCB設計圖（3）：絲印層