Overview
The DRV8832, produced by Texas Instruments, is an integrated motor driver IC designed for low-voltage or battery-powered motion control applications. It features an H-bridge motor driver with PWM voltage-control circuitry and current limit circuitry, making it suitable for driving DC motors, one winding of a stepper motor, or other actuators and loads. The device is particularly useful in maintaining constant motor speed over varying supply voltages, such as those encountered in battery-powered systems.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Operating Supply Voltage (VCC) | 2.75 | - | 6.8 | V |
| Continuous or Peak H-Bridge Output Current (IOUT) | 0 | - | 1 | A |
| Sleep Mode Current | - | 300 nA | - | nA |
| Low MOSFET On-Resistance (HS + LS) | - | 450 mΩ | - | mΩ |
| Internal PWM Frequency | - | 44.5 kHz | - | kHz |
| Thermal Shutdown Temperature | 150 | - | 180 | °C |
| Reference Output Voltage | 1.235 | 1.285 | 1.335 | V |
Key Features
- H-Bridge Voltage-Controlled Motor Driver: Drives DC motors, one winding of a stepper motor, or other actuators and loads.
- Efficient PWM Voltage Control: Maintains constant motor speed over varying supply voltages.
- Low MOSFET On-Resistance: HS + LS 450 mΩ.
- Current Limit Circuit: Regulates motor current during start-up or stall conditions.
- Internal Protection Functions: Overcurrent protection, short-circuit protection, undervoltage lockout, and overtemperature protection.
- Thermally Enhanced Surface Mount Packages: Available in 3-mm x 3-mm 10-pin MSOP and WSON packages with PowerPAD™.
- Reference Voltage Output: Built-in voltage reference output.
- Fault Output Pin: Signals a host processor of a fault condition.
Applications
- Battery-Powered Devices: Toys, printers, robotics, cameras, and phones.
- Small Actuators and Pumps: Suitable for driving small actuators and pumps.
- Motion Control Systems: Ideal for systems requiring constant motor speed over varying supply voltages.
Q & A
- What is the operating supply voltage range of the DRV8832?
The DRV8832 operates on power supply voltages from 2.75 V to 6.8 V.
- What is the maximum output current of the DRV8832?
The DRV8832 can supply up to 1 A of DC/RMS or peak output current.
- How does the DRV8832 maintain constant motor speed over varying supply voltages?
The DRV8832 uses a PWM voltage regulation method to maintain constant motor speed.
- What types of protection does the DRV8832 offer?
The DRV8832 provides overcurrent protection, short-circuit protection, undervoltage lockout, and overtemperature protection.
- What is the purpose of the fault output pin on the DRV8832?
The fault output pin signals a host processor of a fault condition.
- What are the typical applications of the DRV8832?
The DRV8832 is used in battery-powered toys, printers, robotics, cameras, and other low-voltage motion control applications.
- How does the current limit circuit function in the DRV8832?
The current limit circuit regulates the motor current during start-up or stall conditions to prevent overcurrent.
- What is the thermal shutdown temperature of the DRV8832?
The DRV8832 has a thermal shutdown temperature of approximately 160°C.
- What are the package options for the DRV8832?
The DRV8832 is available in 3-mm x 3-mm 10-pin MSOP and WSON packages with PowerPAD™.
- How does the sleep mode function in the DRV8832?
In sleep mode, the output drivers are disabled, and the device enters a low-power state with a typical sleep mode current of 300 nA.
