Texas Instruments DRV10963 Evaluation Module for 3-Phase BLDC Motor DRV10963EVM DRV10963EVM Datenbogen
Produktcode
DRV10963EVM
Introduction
2.4
Speed Adjust Potentiometer (R2)
The speed adjust potentiometer Spd_Adj is shown in
. The potentiometer adjusts the duty cycle of
the PWM signal which will in turn adjust the speed of the motor. In order to lower the duty cycle and in
turn lower the speed, turn the potentiometer counter-clockwise. In order to increase the duty cycle and in
turn increase the speed, turn the potentiometer clockwise.
turn lower the speed, turn the potentiometer counter-clockwise. In order to increase the duty cycle and in
turn increase the speed, turn the potentiometer clockwise.
Figure 4. Speed-Adjust Potentiometer
The onboard PWM signal for the DRV10963 is generated by a circuit based upon TI's TLC555 Low-Power
Timer. It is capable of approximately a 25-kHz output that can be adjusted from 5% to 95% duty cycle.
This square output signal will switch from 0 V to VCC.
Timer. It is capable of approximately a 25-kHz output that can be adjusted from 5% to 95% duty cycle.
This square output signal will switch from 0 V to VCC.
In order to provide an external PWM signal to the DRV10963, first remove the 0.0-
Ω
resistor R4.
Next, connect the external PWM signal to the PWM surface mounted test point. For more information
on the PWM input required by the DRV10963, please refer to the datasheet (
on the PWM input required by the DRV10963, please refer to the datasheet (
).
5
SLAU470 – March 2013
DRV10963 Evaluation Module
Copyright © 2013, Texas Instruments Incorporated