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DRV8838EVM 产品设计参考手册 - TI（德州仪器）
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TI（德州仪器）
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开发套件
描述:
DRV8838 评估模块Texas Instruments DRV8838 EVM 评估模块是用户友好型评估套件，用于演示 TI 有刷电动机驱动器 DRV8838。 DRV8838 由板载 MSP430 微控制器控制。 EVM 是一个高性能、低功耗、经济型平台，可加快开发。1.8A 峰值/1.8A 连续输出 宽工作电压：0 至 11V 分离式 Vm/Vcc 电源将电动机电压与逻辑电源隔离 可评估驱动器性能，带板载 MSP430 MCU 或外部 MCU 板载速度和方向控制；微型 USB 连接，便于评估/供电 包括 5V 有刷直流电动机 ### MOSFET & IGBT 驱动器，Texas Instruments
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DRV8838EVM数据手册
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PCB (Top Assembly View)
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1 PCB (Top Assembly View)
Figure 1 illustrates the top assembly view of the DRV8838EVM.
Figure 1. Top Assembly View
2 Introduction
The DRV8838EVM is a complete solution for evaluating the DRV8838 low-voltage, brushed DC motor
driver. It includes a MSP430 microcontroller that is pre-programmed to take input from an analog
potentiometer for PWM speed control, and a direction jumper to change motor direction. Power can be
provided with the included micro-USB cable for 5 V or externally provided up to 11 V through the power
header. To expand beyond the included firmware capability, the MSP430 is re-programmed via an
external MSP430 USB Stick Development Tool available at www.ti.com/tool/ez430-f2013. Unused pins on
the micro-processor are brought out to plated through holes on the EVM.
2.1 Power Connectors
The DRV8838EVM uses a combination of headers and a USB input jack (on bottom side) for the
application and monitoring of power. For the EVM, only a single power supply rail is necessary and an
onboard 3.3-V regulator provides power to the MSP430 and the logic core (VCC) of the DRV8838 motor
driver. The minimum recommended VIN for the EVM is 1.8 V and the maximum is 11 V. Please see the
DRV8838 datasheet (SLVSBA4) for the complete voltage range information of the driver itself.
VM for the DRV8838 is taken directly off the USB jack supply or J1 power supply header. The J1 header
is located on the top side of the EVM near the bottom-center of the board. The USB jack is located on the
bottom side of the board. Please choose ONLY one method for providing power to the EVM.
NOTE: Do not hot-wire J1 using a jumper!
As previously mentioned, the MSP430 comes pre-programmed to control basic DC motor operation. If it is
desired to change the firmware via the external ez430 development tool, it is not necessary or
recommended to provide any input power to the DRV8838EVM. Power is provided from the ez430 board.
2
DRV8838EVM User’s Guide SLVUA43–February 2014
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