Overview
The DRV8850, produced by Texas Instruments, is a low-voltage H-bridge motor driver integrated with a low-dropout (LDO) voltage regulator. This device is designed to drive DC motors, one winding of a stepper motor, or other loads in various consumer and industrial applications. It operates within a supply voltage range of 2 to 5.5 volts and can deliver up to 5 A of continuous output current and up to 8 A of peak current. The DRV8850 features low MOSFET on-resistance, internal current sensing, and comprehensive fault protection including overcurrent, short circuit, undervoltage, overvoltage, and overtemperature protection. The integrated LDO regulator can supply up to 100 mA, making it suitable for powering microcontrollers or other circuits even in sleep mode.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Supply Voltage (VCC) | 2 | - | 5.5 | V |
| Continuous Output Current | - | - | 5 | A |
| Peak Output Current | - | - | 8 | A |
| MOSFET On-Resistance (HS + LS) | - | 65 | - | mΩ at 4.2V, 25°C |
| LDO Output Current | - | - | 100 | mA |
| Ambient Temperature Range | -40 | - | 85 | °C |
| Junction-to-Ambient Thermal Resistance | - | - | 39.1 | °C/W |
Key Features
- H-Bridge Motor Driver: Drives DC motors, one winding of a stepper motor, or other loads.
- Low MOSFET On-Resistance: 65 mΩ HS + LS at 4.2V, 25°C.
- Internal Current Sensing: With current sense output proportional to H-bridge current.
- Comprehensive Fault Protection: Overcurrent, short circuit, undervoltage, overvoltage, and overtemperature protection.
- Low-Power Sleep Mode: Device can be put in low-power sleep mode while keeping the LDO regulator active.
- Integrated LDO Voltage Regulator: Supplies up to 100 mA, suitable for powering microcontrollers or other circuits.
- 24-Pin VQFN Package: Eco-friendly, RoHS compliant, and no Sb/Br.
Applications
- Battery-Operated Applications: High start-up torque requirements such as electric toothbrushes, shavers, and personal hygiene devices.
- Toys: RC helicopters, cars, and other toy applications.
- Robotics: Low-voltage or battery-powered motion-control applications.
Q & A
- What is the operating supply voltage range of the DRV8850? The DRV8850 operates within a supply voltage range of 2 to 5.5 volts.
- What is the maximum continuous output current of the DRV8850? The DRV8850 can deliver up to 5 A of continuous output current.
- What is the peak output current capability of the DRV8850? The DRV8850 can handle up to 8 A of peak output current.
- What is the MOSFET on-resistance of the DRV8850? The MOSFET on-resistance is 65 mΩ HS + LS at 4.2V, 25°C.
- Does the DRV8850 have internal current sensing? Yes, the DRV8850 has internal current sensing with a current sense output proportional to H-bridge current.
- What types of fault protection does the DRV8850 offer? The DRV8850 offers overcurrent, short circuit, undervoltage, overvoltage, and overtemperature protection.
- Can the DRV8850 be put in a low-power sleep mode? Yes, the device can be put in low-power sleep mode while keeping the LDO regulator active.
- What is the output current capability of the integrated LDO regulator? The integrated LDO regulator can supply up to 100 mA.
- What is the package type and size of the DRV8850? The DRV8850 is packaged in a 24-pin VQFN package with dimensions of 5.5 mm × 3.5 mm.
- Is the DRV8850 eco-friendly? Yes, the DRV8850 is RoHS compliant and free of Sb/Br.
