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Texas Instruments DRV8426ERGER
- Part No.:
- DRV8426ERGER
- Manufacturer:
- Texas Instruments
- Category:
- Motor Drivers, Controllers
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
DRV8426ERGER.pdf
- Description:
- 35V, 1.5A BIPOLAR STEPPER OR DUA
- Quantity:
- Payment:
- Shipping:
Inventory:2,894
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Product details
Overview
DRV8426ERGER from Texas Instruments is a dual H-bridge motor driver IC for bipolar stepper and brushed-DC motors, featuring integrated current sensing (±5% full-scale accuracy), 4.5–33 V operating supply, 900 mΩ total RDS(ON) per bridge at 24 V/25°C, and Smart Tune dynamic decay control. It drives up to 1.5-A full-scale stepper or 2.5-A peak brushed-DC loads in compact VQFN-24 packaging.
For engineers reviewing the DRV8426ERGER datasheet, DRV8426ERGER pinout, DRV8426ERGER application, or DRV8426ERGER equivalent, this page delivers verified electrical specs, validated pin functions, confirmed thermal metrics, real-world decay mode behavior, and precise alternative part comparisons - all grounded in TI's production-grade SLOSE56B documentation.
Technical Context
The DRV8426ERGER integrates two N-channel H-bridges with internal current mirror sensing-eliminating external shunt resistors-and a charge pump for high-side gate drive. Its Smart Tune architecture dynamically selects decay mode (Dynamic Decay or Ripple Control) per bridge based on real-time winding behavior, not fixed timing.
Control is implemented via PH/EN interface (not PWM), with quad-level ADECAY/BDECAY pins selecting decay modes and TOFF setting off-times of 7/16/24/32 μs. Fault reporting uses open-drain nFAULT with UVLO, OCP, CPUV, and OTSD protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4.5 V to 33 V - supports 12 V and 24 V industrial motor rails without external regulators |
| Peak Output Current | 2.5 A per bridge - enables driving medium-torque brushed-DC motors (e.g., printer feed mechanisms) |
| Full-Scale Stepper Current | 1.5 A - sets maximum microstepping resolution and torque for NEMA 11–17 stepper motors |
| RDS(ON) (HS + LS) | 900 mΩ at 24 V/25°C - determines conduction loss and thermal rise under 1.5-A RMS load |
| Current Sense Accuracy | ±5% full-scale - eliminates need for precision external sense resistors and associated board area |
| Sleep Current | 2 µA - enables battery-powered applications (e.g., portable scanners) to maintain multi-year standby life |
| Logic Input Compatibility | 1.8 V / 3.3 V / 5.0 V - interfaces directly with MCU GPIOs without level-shifting circuitry |
Pinout & Package
VQFN-24 package (4.0 mm × 4.0 mm, 0.5 mm pitch) with exposed thermal pad; RoHS-compliant, moisture-sensitive level 2a.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AOUT1, AOUT2 | H-bridge A motor outputs | Connect directly to one stepper coil or brushed-DC motor terminals; rated for ±2.5-A peak switching |
| BOUT1, BOUT2 | H-bridge B motor outputs | Independent second motor interface; supports dual brushed-DC or second stepper phase |
| APH, AEN | Bridge A PH/EN control inputs | Direction (APH) and enable (AEN) signals - logic-compatible with 1.8–5.0-V MCUs |
| BPH, BEN | Bridge B PH/EN control inputs | Separate direction/enable for second bridge; no shared timing constraints with Bridge A |
| VREFA, VREFB | Current regulation reference inputs | Analog voltage (0.05–3.3 V) sets full-scale current per bridge using IREG = VREFx/2.2 V/A |
| nFAULT | Open-drain fault indicator | Pulled low on UVLO, OCP, CPUV, or OTSD; requires external pullup to DVDD or system VCC |
| nSLEEP | Low-power mode input | Logic-low entry into 2-µA sleep; low pulse also clears latched faults |
| VM, PGND | Motor power and ground | High-current paths - require dedicated copper pours and dual 0.01-µF ceramic bypassing per VM pin |
| DVDD | Internal LDO output | 5.0 V ±5% regulated supply for logic; powers internal circuitry and can source external logic loads |
| TOFF, ADECAY, BDECAY | Quad-level configuration inputs | Resistor-tied or direct-connected pins selecting off-time (7/16/24/32 µs) and decay mode (Smart Tune/mixed/fast) |
Key Features
| Feature | Design Value |
|---|---|
| Integrated current sensing | Removes need for two 1-W external shunts - saves >25 mm² PCB area and reduces BOM cost by $0.15–$0.30 |
| Smart Tune Dynamic Decay | Automatically adjusts fast/slow decay ratio each PWM cycle to minimize current ripple without manual tuning |
| Configurable PWM off-time | Four discrete tOFF options (7/16/24/32 µs) let designers balance torque smoothness vs. audible noise in stepper applications |
| Spread spectrum clocking | Reduces peak EMI amplitude by >10 dB in 30–100 MHz band - simplifies Class B EMC compliance for office equipment |
| Inrush current limiting | Soft-starts brushed-DC motors during direction reversal - prevents contact arcing in relay-driven systems |
Applications
| Printer Paper Feed Mechanism | ATM Cash Dispenser Motor |
|---|---|
Use Scenario: Precise bidirectional paper transport in inkjet/laser printers with variable load and jam detection. IC Role / Device Role / Timing Role: Dual H-bridge driver controlling two independent brushed-DC rollers; PH/EN interface synchronized to encoder feedback. Use Value: Integrated current sense detects paper jams at <1.2 A (vs. 2.5-A peak), triggering immediate stop without external sensors. | Use Scenario: High-reliability cash cassette advancement in bank ATMs with strict lifetime (>500,000 cycles) and fault logging requirements. IC Role / Device Role / Timing Role: Stepper motor driver (1.5-A full-scale) for precise cassette indexing; nFAULT reports UVLO/OCP to host controller for predictive maintenance. Use Value: Smart Tune Dynamic Decay maintains sub-5% current ripple across temperature and aging - ensuring consistent step accuracy over 7+ years. |
| Office Automation Scanner Head | Vacuum Robot Brush Motor |
Use Scenario: Low-noise, high-resolution linear motion of CCD sensor array in document scanners with tight acoustic limits (<35 dBA). IC Role / Device Role / Timing Role: Bipolar stepper driver (microstepping enabled via VREF scaling); spread spectrum clocking suppresses 40–80 MHz radiated emissions. Use Value: Configurable 7–32 µs tOFF allows tuning decay to eliminate mechanical resonance at 120 Hz - eliminating audible whine. | Use Scenario: Continuous-duty main brush motor in cordless vacuum robots requiring thermal resilience and battery efficiency. IC Role / Device Role / Timing Role: Brushed-DC H-bridge (2.5-A peak) with inrush limiting and 2-µA sleep mode between cleaning cycles. Use Value: 900 mΩ RDS(ON) limits conduction loss to <1.6 W at 2.5-A peak - enabling 20% longer runtime vs. 1.2-Ω competitors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual H-bridge motor driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DRV8424ERGER | Lower RDS(ON) (330 mΩ HS+LS), same 33-V max, identical pinout | Better thermal performance for 2.5-A continuous brushed-DC loads; higher cost | Select when PCB thermal design cannot sustain >1.1-A RMS per bridge with DRV8426ERGER |
| DRV8436ERGER | Higher voltage rating (48 V), same RDS(ON), identical pinout | Required for 36-V nominal industrial rails; not suitable for 24-V-only designs due to larger die size | Select only if system VM exceeds 33 V - otherwise DRV8426ERGER offers better cost/performance at ≤33 V |
Compared with DRV8424ERGER and DRV8436ERGER, the DRV8426ERGER provides optimal balance of voltage range (4.5–33 V), thermal capability (RθJA = 43.0°C/W), and cost for mid-power office automation and appliance applications - while retaining full pin compatibility for design reuse.
Availability
DRV8426ERGER is available at Aetrix Electronics and suitable for printer transport systems, ATM cash handling modules, and vacuum robot brush drives requiring stable component supply, long-lifecycle support, and TI-qualified automotive/industrial grade reliability.
Supply support for DRV8426ERGER 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.
The DRV8426E product line targets cost-sensitive, space-constrained motor control applications - emphasizing integrated current sensing, smart decay algorithms, and wide-input-voltage operation for office equipment, appliances, and robotics.
FAQ
What is the maximum continuous current the DRV8426ERGER can deliver per H-bridge?
The DRV8426ERGER supports up to 1.5-A full-scale current in stepper mode and 2.5-A peak current in brushed-DC mode. Continuous current depends on PCB thermal design: at 25°C ambient with 2-layer 2-oz copper, derating begins above ~1.1-A RMS due to RθJA = 43.0°C/W. The DRV8426ERGER datasheet specifies 1.5-A full-scale as the maximum calibrated current limit for stepper microstepping accuracy.
Does the DRV8426ERGER require external current sense resistors?
No, the DRV8426ERGER uses an internal current mirror architecture across its power MOSFETs, eliminating external shunt resistors. This achieves ±5% full-scale current accuracy while reducing PCB area, BOM cost, and power loss. The DRV8426ERGER sets trip current via VREFA/VREFB voltage inputs (0.05–3.3 V), with IREG = VREFx/2.2 V/A.
How does Smart Tune Dynamic Decay work in the DRV8426ERGER?
Smart Tune Dynamic Decay in the DRV8426ERGER automatically adjusts the fast-decay percentage within mixed decay each PWM cycle. If current overshoots the ITRIP threshold, it increases fast-decay time; if drive time is excessive, it reduces fast-decay time. This optimizes ripple and efficiency without manual tuning - a core differentiator of the DRV8426ERGER versus fixed-decay drivers.
What package type and thermal characteristics does the DRV8426ERGER use?
The DRV8426ERGER uses a 24-pin VQFN package (4.0 mm × 4.0 mm, 0.5 mm pitch) with exposed thermal pad. Its thermal metrics are RθJA = 43.0°C/W, RθJC(bot) = 6.7°C/W, and ψJB = 19.8°C/W. These values assume standard JEDEC 2-layer board layout; actual performance improves with enhanced thermal vias under the pad and copper pour on inner layers.
Can the DRV8426ERGER drive both stepper and brushed-DC motors simultaneously?
Yes, the DRV8426ERGER can concurrently drive one bipolar stepper motor (using AOUT1/AOUT2 and BOUT1/BOUT2) and one brushed-DC motor (using either bridge independently), or two separate brushed-DC motors. Its dual-bridge architecture and independent VREFA/VREFB inputs allow asymmetric current settings - e.g., 1.5-A full-scale for stepper phase A and 2.0-A peak for brushed motor B - all managed within the single DRV8426ERGER IC.
DRV8426ERGER 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 (2)
- Interface:
- Phase/Enable
- Technology:
- Power MOSFET
- Step Resolution:
- -
- Applications:
- General Purpose
- Current - Output:
- 1.5A
- 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)
DRV8426ERGER FAQ
1.How can I place an order for DRV8426ERGER through Aetrix?
Please submit a Request for Quotation (RFQ) for DRV8426ERGER 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 DRV8426ERGER reliable?
The price and inventory of DRV8426ERGER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DRV8426ERGER is usually 5 days.
3.What payment methods are accepted for DRV8426ERGER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DRV8426ERGER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DRV8426ERGER?
DRV8426ERGER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DRV8426ERGER 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 DRV8426ERGER?
For technical support, including DRV8426ERGER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DRV8426ERGER requirements.
6.How does Aetrix verify that DRV8426ERGER is sourced from the original manufacturer or authorized distributors?
All DRV8426ERGER 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 DRV8426ERGER meets industry standards.
7.What is the process for return or replacement of DRV8426ERGER?
All DRV8426ERGER units undergo pre-shipment inspection (PSI). If there is an issue with DRV8426ERGER, 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 DRV8426ERGER part is unused and in its original packaging.
Return procedure for DRV8426ERGER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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