Overview
The DRV8256ERGER is an N-channel H-bridge motor driver produced by Texas Instruments. This device is designed to drive one bidirectional brushed-DC motor or two unidirectional brushed DC motors. It integrates an H-bridge output power stage, a charge pump regulator, current sensing and regulation, and various protection features. The DRV8256ERGER is suitable for a wide range of industrial applications due to its robust design and comprehensive set of features.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Operating Supply Voltage (VM) | 4.5 | 48 | V | |
| Logic Level Input Voltage | 0 | 5.5 | V | |
| Peak Output Current (IFS) | 0 | 6.4 | A | |
| Operating Ambient Temperature (TA) | -40 | 125 | °C | |
| High-Side FET On Resistance (RDS(ONH)) at 25°C | 82 | 100 | 125 | mΩ |
| Low-Side FET On Resistance (RDS(ONL)) at 25°C | 82 | 100 | 125 | mΩ |
| Output Slew Rate (tSR) at VM = 24V, IO = 1A | 240 | V/μs | ||
| Sleep Mode Supply Current (IVMQ) | 2 | 4 | μA |
Key Features
- Integrated current sensing and regulation to manage motor inrush current and high load events.
- Multiple control interface options: PHASE/ENABLE (PH/EN) and PWM (IN/IN).
- Smart tune, fast, and mixed decay options for PWM control.
- Low RDS(ON): 165 mΩ HS + LS at 24 V, 25°C.
- High output current capability: 6.4-A peak.
- Configurable Off-Time PWM Chopping: 7, 16, 24, or 32 μs.
- Supports 1.8 V, 3.3 V, 5.0 V logic inputs.
- Low-current sleep mode (2 µA).
- Spread spectrum clocking for low EMI.
- Protection features: VM undervoltage lockout (UVLO), charge pump undervoltage (CPUV), overcurrent protection (OCP), thermal shutdown (OTSD), and fault condition output (nFAULT).
Applications
- Brushed DC Motors.
- Printers and scanners.
- ATMs and textile machines.
- Major home appliances.
- Vacuum, humanoid, and robotics.
- Smart meters.
Q & A
- What is the operating supply voltage range of the DRV8256ERGER?
The operating supply voltage range is from 4.5 V to 48 V.
- What types of motors can the DRV8256ERGER drive?
The DRV8256ERGER can drive one bidirectional brushed-DC motor or two unidirectional brushed DC motors.
- What are the key protection features of the DRV8256ERGER?
The key protection features include VM undervoltage lockout (UVLO), charge pump undervoltage (CPUV), overcurrent protection (OCP), thermal shutdown (OTSD), and fault condition output (nFAULT).
- How does the DRV8256ERGER manage motor inrush current?
The DRV8256ERGER integrates current sensing and regulation to manage motor inrush current during startup and high load events.
- What are the control interface options for the DRV8256ERGER?
The control interface options include PHASE/ENABLE (PH/EN) and PWM (IN/IN).
- What is the peak output current capability of the DRV8256ERGER?
The peak output current capability is 6.4 A.
- Does the DRV8256ERGER support different logic input voltages?
Yes, it supports 1.8 V, 3.3 V, and 5.0 V logic inputs.
- What is the sleep mode current consumption of the DRV8256ERGER?
The sleep mode current consumption is 2 µA.
- What is the purpose of the nFAULT pin on the DRV8256ERGER?
The nFAULT pin indicates fault conditions and is pulled logic low during a fault; it requires an external pullup resistor.
- What are some common applications of the DRV8256ERGER?
Common applications include brushed DC motors, printers and scanners, ATMs, textile machines, major home appliances, vacuum and humanoid robotics, and smart meters.
