Overview
The DRV8231ADSGR from Texas Instruments is a 35-V, 3.7-A H-bridge motor driver designed for driving brushed DC motors. This device is part of the DRV8231A family and is packaged in an 8-pin WSON (DSG) package. It features integrated current regulation and current-sense feedback, making it suitable for a variety of applications requiring precise motor control.
The DRV8231A device includes a charge pump that enhances the high-side N-channel MOSFETs, allowing for 100% duty cycle driving. It also incorporates a current mirror architecture for current sensing and regulation, eliminating the need for an external power shunt resistor. The device supports PWM control with frequencies up to 200 kHz and includes multiple protection features such as undervoltage lockout, overcurrent protection, and thermal shutdown.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Supply Voltage Range | 4.5 to 33 | V |
| Peak Output Current | 3.7 | A |
| Logic Input Voltage | 0 to 5.5 | V |
| PWM Frequency | 0 to 200 | kHz |
| RDS(on) High-Side/Low-Side MOSFET | 600 | mΩ |
| Operating Junction Temperature | -40 to 150 | °C |
| Package Type | WSON (DSG) | |
| Package Size | 2.0 × 2.0 mm |
Key Features
- N-channel H-bridge brushed DC motor driver with integrated charge pump
- Integrated current sense feedback using current mirrors (IPROPI)
- Current regulation with fixed off-time PWM chopping scheme
- Supports 1.8-V, 3.3-V, and 5-V logic inputs
- Low-power sleep mode with ultra-low quiescent current draw (<1 µA at VVM = 24 V, TJ = 25°C)
- Integrated protection features: undervoltage lockout (UVLO), overcurrent protection (OCP), and thermal shutdown (TSD)
- PWM control interface with frequencies up to 200 kHz
- Small package and footprint with PowerPAD™ for improved thermal dissipation
Applications
- Printers
- Vacuum robots
- Washers and dryers
- Coffee machines
- POS printers
- Electricity meters
- ATMs (Automated Teller Machines)
- Ventilators
- Surgical equipment
- Electronic hospital beds and bed control systems
- Fitness machines
Q & A
- What is the operating supply voltage range of the DRV8231ADSGR?
The operating supply voltage range is from 4.5 V to 33 V.
- What is the peak output current capability of the DRV8231ADSGR?
The peak output current capability is 3.7 A.
- What types of logic inputs does the DRV8231ADSGR support?
The device supports 1.8-V, 3.3-V, and 5-V logic inputs.
- What is the purpose of the integrated charge pump in the DRV8231ADSGR?
The integrated charge pump enhances the high-side N-channel MOSFETs, allowing for 100% duty cycle driving.
- How does the DRV8231ADSGR implement current sensing and regulation?
The device uses an internal current mirror architecture on the IPROPI pin for current sensing and regulation.
- What protection features are integrated into the DRV8231ADSGR?
The device includes undervoltage lockout (UVLO), overcurrent protection (OCP), and thermal shutdown (TSD).
- What is the package type and size of the DRV8231ADSGR?
The package type is WSON (DSG) with a size of 2.0 × 2.0 mm.
- How does the DRV8231ADSGR enter a low-power sleep mode?
The device enters a low-power sleep mode by bringing both logic inputs low.
- What is the typical RDS(on) of the MOSFETs in the DRV8231ADSGR?
The typical RDS(on) of the MOSFETs is 600 mΩ.
- What are some common applications of the DRV8231ADSGR?
Common applications include printers, vacuum robots, washers and dryers, coffee machines, and more.
