Overview
The DRV8434RGER, produced by Texas Instruments, is a highly integrated stepper motor driver designed for both industrial and consumer applications. This device features two N-channel power MOSFET H-bridge drivers, an integrated current sense architecture, and a microstepping indexer. It supports a wide supply voltage range of 4.5 to 48 V and can drive up to 2.5 A full-scale output current, depending on the PCB thermal design. The DRV8434RGER is known for its simplicity and efficiency, using an internal current sense architecture that eliminates the need for external power sense resistors, thus saving board space and reducing system cost.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage Range | 4.5 | 48 | V | |
| Full-Scale Output Current | 2.5 | A | ||
| RMS Output Current | 1.8 | A | ||
| High-Side FET On Resistance (TJ = 25°C) | 165 | 200 | 200 | mΩ |
| Low-Side FET On Resistance (TJ = 25°C) | 165 | 200 | 200 | mΩ |
| Operating Ambient Temperature | -40 | 125 | °C | |
| Operating Junction Temperature | -40 | 150 | °C | |
| STEP Input Frequency | 500 | kHz |
Key Features
- PWM Microstepping Stepper Motor Driver: Supports up to 1/256 microstepping with a simple STEP/DIR interface.
- Integrated Current Sense: Eliminates the need for external power sense resistors, saving PCB area and system cost.
- Smart Tune Decay Modes: Automatically adjusts for optimal current regulation, compensates for motor variation and aging effects, and reduces audible noise.
- Protection Features: Includes VM undervoltage lockout, charge pump undervoltage, overcurrent protection, open load detection, thermal shutdown, and fault condition output.
- Low-Current Sleep Mode: Consumes only 2 μA in sleep mode.
- Spread Spectrum Clocking: Minimizes radiated emissions from the device.
- Configurable Off-Time PWM Chopping: Supports 7-μs, 16-μs, 24-μs, or 32-μs off-time configurations.
- Logic Input Compatibility: Supports 1.8 V, 3.3 V, and 5.0 V logic inputs.
Applications
- Printers and Scanners
- ATM and Money Handling Machines
- Textile Machines
- Stage Lighting Equipment
- Office and Home Automation
- Factory Automation and Robotics
- Medical Applications
- 3D Printers
Q & A
- What is the supply voltage range of the DRV8434RGER?
The supply voltage range is from 4.5 V to 48 V.
- What is the maximum full-scale output current of the DRV8434RGER?
The maximum full-scale output current is 2.5 A.
- What is the RMS output current rating of the DRV8434RGER?
The RMS output current rating is 1.8 A.
- What types of decay modes does the DRV8434RGER support?
The device supports smart tune, slow, mixed, and fast decay modes.
- Does the DRV8434RGER require external power sense resistors?
No, it uses an integrated current sense architecture that eliminates the need for external power sense resistors.
- What is the purpose of the smart tune feature in the DRV8434RGER?
The smart tune feature automatically adjusts for optimal current regulation, compensates for motor variation and aging effects, and reduces audible noise.
- What protection features are included in the DRV8434RGER?
The device includes VM undervoltage lockout, charge pump undervoltage, overcurrent protection, open load detection, thermal shutdown, and fault condition output.
- How does the DRV8434RGER minimize radiated emissions?
The device uses spread spectrum clocking to minimize radiated emissions.
- What is the current consumption in sleep mode for the DRV8434RGER?
The current consumption in sleep mode is 2 μA.
- What are the supported logic input voltages for the DRV8434RGER?
The device supports 1.8 V, 3.3 V, and 5.0 V logic inputs.
