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DRV8871EVM 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
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TEXAS INSTRUMENTS DRV8871EVM 评估电路板, 无刷直流电机驱动器
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DRV8871EVM数据手册
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Introduction
1.2 Test Points
Test points are provided and labeled according to the inputs/outputs of the DRV8871 motor driver.
Test point “PWM_R” is generated by a TLC555 located on the EVM. If an externally generated PWM
signal is desired, either:
1. Remove the shunt on IN1 or IN2 and connect the external PWM signal to the IN1 or IN2 test point (this
is recommended), or
2. Remove the 0.0-Ω resistor R5 and connect the external PWM signal to the “PWM_R” test point. The
“PWM” signal generated by the onboard circuitry EVM is approximately 25 kHz and can be adjusted
from 5% to 95% duty cycle by the potentiometer (R6) located on the EVM.
1.3 Jumpers
The following images illustrate the possible connections to the INx jumpers
Figure 3. IN1 Connected to GND (Logic Low) Figure 4. IN1 Connected to V5P0 (Logic High)
Figure 5. IN1 Connected to PWM Output Figure 6. IN1 Floating, can be Controlled Externally
Figure 7. IN2 Connected to GND (Logic Low) Figure 8. IN2 Connected to V5P0 (Logic High)
3
SLVUAJ4–August 2015 DRV8871 Evaluation Module
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