The DRV8432DKD is a motor driver IC produced by Texas Instruments (TI). This IC is designed for driving bipolar stepper motors and other applications, and it comes in a HTSSOP-28 (Heat Sink Thin Shrink Small Outline Package) package with 28 pins.
Here is the detailed explanation of the pin functions and a corresponding FAQ section based on the DRV8432DKD's full pinout and functions. I'll break it down as requested:
Pin Function List (28 Pins)
Below is the list of all 28 pins and their corresponding functions for the DRV8432DKD.
Pin No. Pin Name Function Description 1 VBB Power supply input for the motor driver. Typically supplied by the motor's power source (e.g., 8V to 45V). 2 GND Ground pin for the device. 3 VCP capacitor connection for the charge pump, providing voltage for the high-side MOSFETs . 4 VS Motor power supply input voltage. Connect to the motor's power source. 5 FAULT Fault output, logic low indicates a fault condition (e.g., overcurrent, overtemperature). 6 SLEEP Sleep input, when logic high, the device enters a low-power sleep mode. 7 RESET Reset input, when logic high, it resets the device. 8 DIR Direction control input for controlling motor rotation direction. 9 STEP Step input for controlling stepper motor step signals. 10 ENABLE Enables or disables the motor driver. Logic high enables operation, logic low disables it. 11 V3P3 3.3V regulator output, can be used to power logic circuits that require 3.3V. 12 AOUT1 A-phase motor output 1. 13 AOUT2 A-phase motor output 2. 14 BOUT1 B-phase motor output 1. 15 BOUT2 B-phase motor output 2. 16 ISENSE_A A-phase current sensing input, used to monitor the motor current for protection and control. 17 ISENSE_B B-phase current sensing input, used to monitor the motor current for protection and control. 18 VREF Reference voltage input for controlling motor current scaling. 19 VDD Logic supply input, provides power to the logic side of the IC. 20 DRVSTBY Driver standby pin, when logic high, the driver is in a standby mode. 21 VREG Voltage regulator output, used to power the internal logic circuitry. 22 CP_OUT Charge pump output, powers the high-side MOSFETs in the device. 23 OVERRIDE Override input for controlling the operation of certain pins manually. 24 PWM_A A-phase pulse-width modulation input for controlling current. 25 PWM_B B-phase pulse-width modulation input for controlling current. 26 DAC1 DAC output for setting motor current. Used to program the motor current. 27 DAC2 Another DAC output for controlling motor current. 28 N/C No connection.FAQ Section (20 Common Questions and Answers)
Q: What is the VBB pin used for on the DRV8432DKD? A: The VBB pin is used as the power supply input for the motor driver, typically supplied by the motor's power source (8V to 45V).
Q: Can I connect the VCP pin to the motor supply voltage directly? A: No, the VCP pin is for the charge pump and should be connected to an external capacitor to provide voltage to the high-side MOSFETs.
Q: What is the function of the FAULT pin? A: The FAULT pin is a logic output that indicates the presence of a fault condition, such as overcurrent or overtemperature.
Q: What should I do if the device enters a fault state? A: Check the FAULT pin for a low signal and then address the fault condition, such as ensuring proper motor current and temperature levels.
Q: What is the purpose of the SLEEP pin? A: The SLEEP pin is used to put the device into a low-power sleep mode when logic high.
Q: How can I reset the DRV8432DKD? A: The RESET pin should be driven high to reset the device.
Q: What does the DIR pin control? A: The DIR pin controls the direction of motor rotation.
Q: Can the DRV8432DKD drive a motor without a STEP signal? A: No, the STEP pin is required to provide step signals to control the motor.
Q: How does the ENABLE pin work? A: The ENABLE pin enables or disables the motor driver. Logic high enables operation, while logic low disables it.
Q: What is the role of the V3P3 pin? A: The V3P3 pin provides a 3.3V output that can be used to power external logic circuits.
Q: What is the use of the AOUT1 and AOUT2 pins? A: These pins are used to drive the A-phase of the stepper motor.
Q: How do I control the B-phase of the motor? A: The B-phase of the motor is controlled using the BOUT1 and BOUT2 pins.
Q: What is the purpose of the ISENSEA and ISENSEB pins? A: These pins are used for current sensing in the A-phase and B-phase of the motor to provide feedback for protection and control.
Q: How do I set the current scaling for the motor? A: The VREF pin is used to input the reference voltage to control the motor's current scaling.
Q: What voltage should I supply to the VDD pin? A: The VDD pin should be supplied with a voltage typically between 3V and 5V to power the logic side of the device.
Q: What does the DRVSTBY pin do? A: The DRVSTBY pin puts the driver into a standby mode when logic high.
Q: How do I power the logic circuitry of the DRV8432DKD? A: The VREG pin provides power to the internal logic circuitry.
Q: What is the CPOUT pin for? A: The CPOUT pin provides the charge pump output to power the high-side MOSFETs of the device.
Q: What does the OVERRIDE pin do? A: The OVERRIDE pin allows manual control of certain pins in the device, overriding default logic behavior.
Q: What is the DAC1 and DAC2 used for? A: These DAC outputs are used to set the motor's current by providing a digital-to-analog conversion signal to control the current.
This detailed information covers the full range of functions for each pin of the DRV8432DKD motor driver and includes a FAQ for common questions on the device's operation. If you need further specifics on the electrical characteristics or circuit examples, I can help with that too!