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Texas Instruments DRV8425RGER
- Part No.:
- DRV8425RGER
- Manufacturer:
- Texas Instruments
- Category:
- Motor Drivers, Controllers
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
DRV8425RGER.pdf
- Description:
- IC MOTOR DRIVER
- Quantity:
- Payment:
- Shipping:
Inventory:3,045
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Product details
Overview
DRV8425RGER from Texas Instruments is a fully integrated bipolar stepper motor driver IC with 1/256 microstepping, integrated current sensing (±5% full-scale accuracy), and Smart Tune decay technology. It delivers up to 2 A full-scale output per bridge at 4.5–33 V supply, eliminating external sense resistors, and targets precision motion control in compact industrial actuators.
For engineers reviewing the DRV8425RGER datasheet, DRV8425RGER pinout, DRV8425RGER application, or DRV8425RGER equivalent, key selection considerations include its VQFN-24 package thermal performance (RθJA = 40.7°C/W), configurable off-time PWM chopping (7–32 μs), ±5% current accuracy without sense resistors, and compatibility with STEP/DIR controllers requiring low-noise microstepping.
Technical Context
The DRV8425RGER integrates two N-channel H-bridge power stages with internal current-sense architecture-replacing external shunt resistors-and a programmable microstepping indexer supporting full-step to 1/256 resolution. Its Smart Tune decay dynamically adjusts PWM off-time and fast-decay percentage to maintain sinusoidal winding current fidelity across voltage, temperature, and motor variation.
Control is implemented via dedicated logic-level inputs: STEP (≤500 kHz), DIR, ENABLE, nSLEEP, M0/M1 (microstep mode), DECAY0/DECAY1 (decay type), and TOFF (off-time selection). Fault reporting uses open-drain nFAULT with UVLO, OCP (3.2 A peak), CPUV, and OTSD (150°C trip) protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4.5 V to 33 V - supports wide-input industrial and 24-V DC systems without external regulators. |
| Full-Scale Output Current | 2 A per bridge - sets maximum sinusoidal amplitude for 1/256 microstepping; dependent on PCB thermal design. |
| RDS(ON) (HS + LS) | 550 mΩ at 24 V, 25°C - determines conduction loss and thermal rise under full-load RMS current (1.4 A). |
| Microstepping Resolution | 1/256 - enables ultra-smooth motion and <10 dB audible noise reduction vs. full-step in printers and lab equipment. |
| Current Sense Accuracy | ±5% full-scale - eliminates calibration overhead and external resistor tolerance stack-up in closed-loop current control. |
| Off-Time Configurations | 7 / 16 / 24 / 32 μs - selects PWM chopping frequency to balance torque ripple, EMI, and MOSFET switching loss. |
| Logic Input Compatibility | 1.8 V / 3.3 V / 5.0 V - interfaces directly with MCU GPIOs without level-shifting in mixed-voltage embedded systems. |
Pinout & Package
VQFN-24 package (4.0 mm × 4.0 mm, 0.5-mm pitch) with exposed thermal pad - optimized for high-power density and PCB area efficiency in space-constrained stepper modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AOUT1, AOUT2 | Winding A H-bridge outputs | Drive one phase of bipolar stepper; require low-inductance layout to minimize voltage spikes during decay. |
| BOUT1, BOUT2 | Winding B H-bridge outputs | Drive second phase; paired with AOUTx for full 2-phase excitation in microstepping sequences. |
| VM | Motor power supply input | Accepts 4.5–33 V; requires dual 0.01-μF ceramic + bulk capacitor to PGND for stable high-current switching. |
| VREF | Current reference input | 0–2.64 V analog setpoint; defines full-scale current (2 A max); sourced from DAC or resistor divider. |
| STEP, DIR, ENABLE, nSLEEP | Digital control inputs | CMOS-compatible; internal pullups/pulldowns eliminate external biasing; nSLEEP low clears faults. |
| nFAULT | Open-drain fault indicator | Active-low signal for UVLO, OCP, OTSD, or CPUV; requires external pullup to DVDD or 3.3 V. |
| CPH, CPL, VCP | Charge pump nodes | Support internal gate drive above VM; CPH–CPL requires 0.022-μF X7R cap; VCP–VM requires 0.22-μF X7R cap. |
| PGND, GND, PAD | Power and signal grounds | Separate PGND (high-current return) and GND (logic ground); thermal pad must be soldered to PCB ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated current sensing | Eliminates two external 5-W sense resistors, reducing BOM cost by ≥$0.35 and PCB area by >12 mm². |
| Smart Tune decay | Automatically adapts off-time and fast-decay % to maintain waveform fidelity-no manual tuning across motor loads or temperatures. |
| Spread spectrum clocking | Reduces peak EMI by >10 dB in 30–100 MHz band-meets Class B CISPR-32 without added shielding or ferrites. |
| Low-power sleep mode | 2 μA quiescent current enables battery-backed hold position in portable medical devices and IoT actuators. |
| Configurable microstepping | 1/256 resolution via M0/M1 pins-supports smooth positioning in 3D printer Z-axis and stage lighting pan/tilt mechanisms. |
Applications
| Printers and Scanners | 3D Printers |
|---|---|
Use Scenario: Precision paper feed and carriage movement in multifunction inkjet printers. IC Role / Device Role / Timing Role: Stepper driver executing 1/16–1/256 microsteps under STEP/DIR commands from MCU; regulates coil current to ±5% accuracy. Use Value: Eliminates cogging and vibration at low speeds, enabling <5-μm positional repeatability and silent operation during office hours. |
Use Scenario: Z-axis vertical lift actuation in fused deposition modeling (FDM) printers. IC Role / Device Role / Timing Role: Bipolar stepper controller driving NEMA17 motor with Smart Tune decay to suppress resonance-induced layer shifting. Use Value: Maintains torque linearity across 0–100 mm/s travel speeds, preventing Z-wobble and improving surface finish on printed parts. |
| Medical Fluid Pumps | Factory Automation Actuators |
Use Scenario: Syringe-driven infusion pumps requiring precise volumetric delivery (e.g., 0.1 mL/hr). IC Role / Device Role / Timing Role: Microstepping indexer generating 1/256 steps per revolution; VREF-set current ensures consistent peristaltic pressure. Use Value: Enables ±1.5% flow rate accuracy over 0–40°C ambient-critical for IV drug administration compliance. |
Use Scenario: Linear actuators in pick-and-place robots handling small electronic components. IC Role / Device Role / Timing Role: High-bandwidth STEP input (≤500 kHz) synchronized to PLC motion profile; nFAULT signals overtemperature shutdown. Use Value: Supports 200+ cycles/min throughput while maintaining thermal margin via RθJB = 17.7°C/W and exposed thermal pad. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar stepper driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DRV8424RGER | Lower RDS(ON) (330 mΩ), higher full-scale current (2.5 A), same pinout and features. | Better suited for 24-V systems demanding >1.8-A RMS current or higher torque at elevated ambient temperatures. | Select DRV8424RGER when thermal headroom is constrained and motor load exceeds 1.4-A RMS. |
| DRV8434RGER | 48-V max supply, 330-mΩ RDS(ON), same VQFN-24 package but not pin-compatible-requires PCB redesign. | Enables higher-speed operation in 48-V industrial servo stages where 33-V headroom limits acceleration. | Choose DRV8434RGER only if system voltage exceeds 33 V and layout revision is acceptable. |
Compared with DRV8425RGER, DRV8424RGER offers higher current capability in identical footprint, while DRV8434RGER extends voltage range at the cost of board rework-neither is pin-compatible drop-in replacement, but both serve adjacent motion control tiers.
Availability
DRV8425RGER is available at Aetrix Electronics and suitable for printers and scanners, 3D printers, medical fluid pumps, and factory automation actuators requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for DRV8425RGER includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing solutions, with decades of expertise in motor control ICs and high-reliability power management.
The DRV842x family was designed specifically for cost-sensitive, space-constrained industrial and consumer stepper applications-emphasizing integration (current sense, indexer, decay control), low EMI, and simplified system-level design.
FAQ
What is the maximum microstepping resolution supported by the DRV8425RGER?
The DRV8425RGER supports up to 1/256 microstepping via its internal indexer, configured using the M0 and M1 pins. This resolution is confirmed in the device's datasheet Section 7.3.3 and Table 7-3, enabling ultra-fine positional control in applications like 3D printer Z-axis movement and precision lab equipment.
Does the DRV8425RGER require external current sense resistors?
No, the DRV8425RGER does not require external current sense resistors. It uses an integrated current-sense architecture with ±5% full-scale accuracy, as specified in Section 1 Features and Section 7.3.1 of the datasheet. This eliminates two high-power shunts, saving PCB area and BOM cost.
What is the full-scale current rating of the DRV8425RGER, and how is it set?
The DRV8425RGER has a full-scale current rating of 2 A per bridge, set by the analog voltage applied to the VREF pin (0–2.64 V). This relationship is defined by the transimpedance gain KV (1.32 V/A typical), per Section 6.5 Electrical Characteristics and Section 7.3.1.3 of the datasheet.
How does Smart Tune decay improve motor performance in the DRV8425RGER?
Smart Tune decay in the DRV8425RGER automatically adjusts PWM off-time and fast-decay percentage to maintain accurate sinusoidal winding current-compensating for motor variation, aging, and supply voltage changes. This reduces torque ripple and audible noise without manual tuning, as detailed in Section 7.3.4.
What thermal metrics apply to the DRV8425RGER in its VQFN-24 package?
The DRV8425RGER in VQFN-24 (RGE) package has RθJA = 40.7°C/W, RθJB = 17.7°C/W, and RθJC(bot) = 4.7°C/W, per Section 6.4 Thermal Information. These values assume proper thermal pad soldering to PCB ground plane and define safe operating area under 1.4-A RMS load.
DRV8425RGER Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Motor Type - Stepper:
- Bipolar
- Motor Type - AC, DC:
- Brushed DC
- Function:
- Driver - Fully Integrated, Control and Power Stage
- Output Configuration:
- Half Bridge (4)
- Interface:
- Step/Direction
- Technology:
- Power MOSFET
- Step Resolution:
- 1 ~ 1/256
- Applications:
- Consumer, Industrial
- Current - Output:
- 2A
- Voltage - Supply:
- 0V ~ 5.5V
- Voltage - Load:
- 4.5V ~ 33V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-VQFN (4x4)
DRV8425RGER FAQ
1.How can I place an order for DRV8425RGER through Aetrix?
Please submit a Request for Quotation (RFQ) for DRV8425RGER on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for DRV8425RGER reliable?
The price and inventory of DRV8425RGER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DRV8425RGER is usually 5 days.
3.What payment methods are accepted for DRV8425RGER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DRV8425RGER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DRV8425RGER?
DRV8425RGER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DRV8425RGER order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for DRV8425RGER?
For technical support, including DRV8425RGER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DRV8425RGER requirements.
6.How does Aetrix verify that DRV8425RGER is sourced from the original manufacturer or authorized distributors?
All DRV8425RGER products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DRV8425RGER meets industry standards.
7.What is the process for return or replacement of DRV8425RGER?
All DRV8425RGER units undergo pre-shipment inspection (PSI). If there is an issue with DRV8425RGER, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The DRV8425RGER part is unused and in its original packaging.
Return procedure for DRV8425RGER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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