Overview
The DRV8251ADDAR, produced by Texas Instruments, is an integrated motor driver designed for driving brushed DC motors. This device features an N-channel H-bridge configuration, a charge pump, current sense feedback, current regulation, and comprehensive protection circuitry. It operates within a supply voltage range of 4.5-V to 48-V and can handle high output currents up to 4.1-A peak. The DRV8251ADDAR is part of a family of scalable devices, offering pin-to-pin compatibility with various RDS(on) and supply voltage options, making it versatile for different load and supply rail requirements.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Supply Voltage Range | 4.5 to 48 | V |
| Peak Output Current | 4.1 | A |
| RDS(on) | 450 | mΩ |
| Logic Input Voltage | 1.8, 3.3, 5 | V |
| Package Type | HSOP (DDA) with 8 pins | |
| Package Size | 4.9 × 6.0 mm | mm |
| Operating Temperature Range | -40 to 150 | °C |
| Quiescent Current in Sleep Mode | <1 µA at VVM = 24 V, TJ = 25°C | µA |
Key Features
- N-channel H-bridge brushed DC motor driver
- Integrated charge pump for efficient N-channel MOSFET half bridges and 100% duty cycle driving
- High output current capability: 4.1-A peak
- PWM control interface with frequencies up to 200 kHz
- Supports 1.8-V, 3.3-V, and 5-V logic inputs
- Integrated IPROPI current sensing for stall detection and current regulation
- Low-power sleep mode with ultra-low quiescent current draw
- Small package and footprint: 8-Pin HSOP with PowerPAD™, 4.9 × 6.0 mm
- Integrated protection features: supply undervoltage lockout (UVLO), auto-retry overcurrent protection (OCP), and thermal shutdown (TSD)
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 DRV8251ADDAR?
The DRV8251ADDAR operates within a supply voltage range of 4.5-V to 48-V.
- What is the peak output current capability of the DRV8251ADDAR?
The DRV8251ADDAR can handle peak output currents up to 4.1-A.
- What type of logic inputs does the DRV8251ADDAR support?
The DRV8251ADDAR supports 1.8-V, 3.3-V, and 5-V logic inputs.
- What is the purpose of the integrated charge pump in the DRV8251ADDAR?
The integrated charge pump improves efficiency by supporting N-channel MOSFET half bridges and 100% duty cycle driving.
- How does the DRV8251ADDAR implement current sensing and regulation?
The DRV8251ADDAR uses an internal current mirror architecture on the IPROPI pin for current sensing and regulation, eliminating the need for a large power shunt resistor.
- What are the integrated protection features of the DRV8251ADDAR?
The DRV8251ADDAR includes supply undervoltage lockout (UVLO), auto-retry overcurrent protection (OCP), and thermal shutdown (TSD).
- What is the quiescent current in sleep mode for the DRV8251ADDAR?
The quiescent current in sleep mode is less than 1 µA at VVM = 24 V, TJ = 25°C.
- What is the package type and size of the DRV8251ADDAR?
The DRV8251ADDAR comes in an 8-pin HSOP (DDA) package with a size of 4.9 × 6.0 mm.
- What are some common applications for the DRV8251ADDAR?
Common applications include printers, vacuum robots, washers and dryers, coffee machines, POS printers, electricity meters, ATMs, ventilators, surgical equipment, electronic hospital beds, and fitness machines).
- How does the DRV8251ADDAR handle motor speed control?
Motor speed can be controlled using pulse-width modulation (PWM) at frequencies between 0 to 200 kHz).
