Texas Instruments DRV8839 Evaluation Module DRV8839EVM DRV8839EVM 데이터 시트
제품 코드
DRV8839EVM
PCB (Top-Assembly View)
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PCB (Top-Assembly View)
Figure 1. PCB (Top Assembly View)
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Introduction
The DRV8839EVM is a complete solution for evaluating the DRV8839 low voltage brushed DC motor
driver. It includes a MSP430 microcontroller that is preprogrammed to take input from two dedicated
analog potentiometers, for PWM speed control of 2 motors. Two enable jumpers provide the ability to HIZ
the motor outputs. 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 can easily be reprogrammed via an external MSP430 USB Stick Development Tool available at
driver. It includes a MSP430 microcontroller that is preprogrammed to take input from two dedicated
analog potentiometers, for PWM speed control of 2 motors. Two enable jumpers provide the ability to HIZ
the motor outputs. 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 can easily be reprogrammed via an external MSP430 USB Stick Development Tool available at
2.1
Power Connectors
The DRV8839EVM uses a combination of headers and a USB input jack (on the 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 micro and the logic core, VCC, of the DRV8839
motor driver. The minimum recommended Vin for the EVM is 1.8 V and maximum is 11 V. Please see the
datasheet for the DRV8839 (
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 micro and the logic core, VCC, of the DRV8839
motor driver. The minimum recommended Vin for the EVM is 1.8 V and maximum is 11 V. Please see the
datasheet for the DRV8839 (
) for complete voltage range information of the driver itself.
VM for the DRV8839 is directly taken off the USB jack supply of the 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. Choose one method ONLY for providing power to the EVM.
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. Choose one method ONLY for providing power to the EVM.
As previously mentioned, the MSP430 comes preprogrammed to control basic DC motor operation. If
changing the firmware via the external ez430 development tool is desired, it is NOT necessary or
recommended to provide any input power to the DRV8839EVM. Power is provided from the ez430 board.
changing the firmware via the external ez430 development tool is desired, it is NOT necessary or
recommended to provide any input power to the DRV8839EVM. Power is provided from the ez430 board.
2.2
Test Points
Test points are provided and labeled for the inputs to the DRV8839 motor driver and also the control
signals back to the MCU. The inputs are labeled IN1 and IN2. The control inputs for enabling and
disabling the motor outputs are labeled as EN1 and EN2.
signals back to the MCU. The inputs are labeled IN1 and IN2. The control inputs for enabling and
disabling the motor outputs are labeled as EN1 and EN2.
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DRV8839 Evaluation Module
SLVU879 – February 2013
Copyright © 2013, Texas Instruments Incorporated