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Texas Instruments DRV8434PWPR
- Part No.:
- DRV8434PWPR
- Manufacturer:
- Texas Instruments
- Category:
- Motor Drivers, Controllers
- Package:
- 28-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
DRV8434PWPR.pdf
- Description:
- IC MOTOR DRIVER
- Quantity:
- Payment:
- Shipping:
Inventory:3,180
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Product details
Overview
DRV8434PWPR from Texas Instruments is a fully integrated bipolar stepper motor driver IC with internal current sensing, 1/256 microstepping indexer, STEP/DIR interface, and Smart Tune decay control. It delivers 2.5-A full-scale output current at 24 V, operates from 4.5 V to 48 V, and features ±4% current accuracy without external sense resistors - used in precision motion control for 3D printers and automated office equipment.
For engineers reviewing the DRV8434PWPR datasheet, DRV8434PWPR pinout, DRV8434PWPR application, or DRV8434PWPR equivalent, key selection considerations include its HTSSOP-28 package, integrated current sense architecture, configurable off-time (7–32 μs), smart tune vs. mixed/slow decay mode selection, and compatibility with 1.8 V/3.3 V/5.0 V logic inputs.
Technical Context
The DRV8434PWPR integrates dual N-channel H-bridge drivers, a microstepping indexer, and current-sense MOSFETs - eliminating external sense resistors and reducing PCB area and BOM cost. Its Smart Tune decay dynamically adjusts fast-decay percentage or ripple current based on load and speed, while supporting fixed off-time modes (7/16/24/32 μs) via TOFF pin configuration.
It uses an internal charge pump (360 kHz switching) to drive high-side FETs, supports tri-level and quad-level logic inputs (M0/M1/DECAY0/DECAY1/TOFF), and provides fault reporting via open-drain nFAULT with UVLO, OCP, OL, CPUV, and OTSD protection - all coordinated through dedicated pins and internal state machines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4.5 V to 48 V - supports wide-input industrial and consumer motor supplies without external regulators. |
| Full-Scale Output Current | 2.5 A - maximum regulated winding current per bridge; limited by thermal design and PCB layout. |
| RMS Output Current | 1.8 A - continuous thermal limit under typical ambient conditions and board cooling. |
| Current Accuracy | ±4% full-scale - enables precise torque control without calibration or external sensing components. |
| Microstepping Resolution | 1/256 - reduces audible noise and vibration while enabling smooth low-speed motion in positioning systems. |
| Off-Time Configuration | 7 / 16 / 24 / 32 μs - sets PWM chopping period for decay control; selectable via TOFF pin voltage level. |
| Logic Input Compatibility | 1.8 V / 3.3 V / 5.0 V - interoperable with MCU GPIOs across common embedded platforms without level shifters. |
| Sleep Current | 2 μA - enables ultra-low-power standby in battery-operated or energy-sensitive motion systems. |
Pinout & Package
DRV8434PWPR is housed in a thermally enhanced 28-pin HTSSOP (PowerPAD™) package measuring 9.7 mm × 4.4 mm, with exposed thermal pad for improved heat dissipation. Pin functions are validated per TI's official datasheet SLOSE47A (Rev. May 2022).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AOUT1, AOUT2 | Motor Winding A Outputs | Drive one phase of bipolar stepper; connect directly to motor coil terminals. |
| BOUT1, BOUT2 | Motor Winding B Outputs | Drive second phase; complementary to AOUT pair for full bipolar excitation. |
| STEP, DIR | Digital Control Inputs | Rising-edge STEP advances indexer; DIR sets rotation direction - no timing-critical firmware overhead. |
| VREF | Current Set Reference | Analog input (0.05–3.3 V) setting full-scale current via IFS = VREF / 1.32 V/A. |
| nFAULT | Fault Indicator Output | Open-drain signal pulled low during UVLO, OCP, OL, CPUV, or OTSD - requires external pullup. |
| nSLEEP | Low-Power Mode Control | Logic high enables operation; low enters 2-μA sleep - also clears latched faults on pulse. |
| VM, PGND, GND | Power Supply Terminals | VM (4.5–48 V) powers motor bridges; PGND carries high-current return; GND is logic ground reference. |
| CPH, CPL, VCP | Charge Pump Nodes | Internal charge pump generates gate drive voltage; requires 0.022-μF (CPH–CPL) and 0.22-μF (VCP–VM) X7R ceramics. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Current Sense | Eliminates two external 0.1-Ω sense resistors - saves >12 mm² PCB area and removes 1–2 W of resistive loss. |
| Smart Tune Decay | Automatically adapts decay behavior to motor parameters and speed - reduces tuning effort and audible noise without firmware changes. |
| Spread Spectrum Clocking | Reduces peak EMI emissions from internal oscillator and charge pump - simplifies EMC compliance in compact enclosures. |
| Configurable Microstepping | Hardware-selectable 1/256 resolution via M0/M1 pins - enables smooth motion without host processor microstep interpolation. |
| Comprehensive Protection | UVLO, OCP (4-A trip), OL detection (75-mA threshold), CPUV, and OTSD (150°C shutdown) - prevents damage under fault conditions. |
| Thermal Performance | RθJA = 29.7°C/W (HTSSOP) - supports 1.8-A RMS operation with minimal copper area; RθJB = 9.3°C/W enables efficient board conduction cooling. |
Applications
| 3D Printers | Office Automation |
|---|---|
Use Scenario: Precise layer deposition and gantry positioning using NEMA 17 stepper motors. IC Role / Device Role / Timing Role: Stepper driver IC managing microstepped coil currents and decay timing; replaces discrete H-bridge + sense resistor + controller combo. Use Value: 1/256 microstepping eliminates visible banding; Smart Tune suppresses resonance-induced vibration at mid-band speeds. |
Use Scenario: Document feeders, scanner carriages, and automatic stapler mechanisms in multifunction printers. IC Role / Device Role / Timing Role: Motion controller IC executing STEP/DIR commands from MCU; handles current regulation and fault recovery autonomously. Use Value: Integrated current sense and 2-μA sleep mode reduce power consumption and component count in always-on peripherals. |
| Factory Robotics | Medical Fluid Handling |
Use Scenario: End-effector actuation and small-axis positioning in collaborative robots and pick-and-place modules. IC Role / Device Role / Timing Role: Bipolar stepper driver providing torque-controlled motion with real-time fault signaling via nFAULT. Use Value: 4.5–48-V operation accommodates 24-V industrial rails; OTSD and OCP protect against jam-induced thermal runaway. |
Use Scenario: Syringe pump and lab automation valve positioning requiring repeatable sub-millimeter accuracy. IC Role / Device Role / Timing Role: Precision current-regulated driver ensuring consistent step torque across temperature and supply variation. Use Value: ±4% current accuracy maintains dosing consistency; spread spectrum clocking meets Class B EMC requirements near sensitive analog circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar stepper motor driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DRV8436PWPR | Same 48-V max rating and 1/256 microstepping, but higher RDS(ON) (900 mΩ HS+LS vs. 330 mΩ). | Lower efficiency and higher thermal load at 2.5-A full-scale; suitable only where lower current or forced cooling is acceptable. | Select DRV8436PWPR only if footprint compatibility is required and thermal margin allows higher losses. |
| DRV8424PWPR | 33-V max rating, same 330-mΩ RDS(ON), but lacks Smart Tune and supports only up to 1/128 microstepping. | Not suitable for 48-V systems or applications demanding lowest audible noise; requires manual decay tuning. | Choose DRV8424PWPR for cost-sensitive 24-V designs where Smart Tune is not needed and 1/128 resolution suffices. |
Compared with DRV8434PWPR, DRV8436PWPR trades lower conduction loss for higher thermal demand, while DRV8424PWPR sacrifices Smart Tune adaptability and voltage headroom - making DRV8434PWPR optimal for 48-V, low-noise, thermally constrained stepper systems.
Availability
DRV8434PWPR is available at Aetrix Electronics and suitable for 3D printers, office automation equipment, and factory robotics requiring stable component supply, long-term manufacturability, and automotive-grade reliability validation.
Supply support for DRV8434PWPR 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, embedded processing, and power management technologies - with over 50 years of innovation in motor control ICs.
The DRV8434PWPR belongs to TI's high-integration stepper driver product line, designed specifically for compact, low-noise, and thermally efficient motion control in industrial and consumer equipment - emphasizing ease of use and system-level BOM reduction.
FAQ
What is the maximum motor supply voltage supported by the DRV8434PWPR?
The DRV8434PWPR supports a motor supply voltage (VM) range of 4.5 V to 48 V. Absolute maximum VM is 50 V, but operation above 48 V violates recommended conditions and risks permanent damage. The device includes VM undervoltage lockout (UVLO) that activates below 4.25 V (typical) to prevent erratic behavior during brownout.
Does the DRV8434PWPR require external current sense resistors?
No, the DRV8434PWPR does not require external current sense resistors. It uses an integrated current-sense architecture with matched MOSFETs to achieve ±4% full-scale current accuracy - eliminating two 0.1-Ω power resistors, saving PCB space, reducing heat generation, and lowering BOM cost. The VREF pin sets the current regulation threshold.
How does Smart Tune decay differ from traditional mixed decay in the DRV8434PWPR?
Smart Tune decay in the DRV8434PWPR automatically adjusts fast-decay percentage or ripple current based on real-time motor behavior, whereas traditional mixed decay uses fixed ratios. Smart Tune minimizes current distortion and audible noise across varying speeds and loads without firmware intervention - unlike mixed decay, which requires manual tuning for each motor and operating point.
What package type and thermal characteristics apply to the DRV8434PWPR?
The DRV8434PWPR uses a 28-pin HTSSOP (PWP) package with PowerPAD™, measuring 9.7 mm × 4.4 mm. Its thermal resistance is RθJA = 29.7°C/W (junction-to-ambient) and RθJB = 9.3°C/W (junction-to-board), enabling 1.8-A RMS operation with standard 2-oz copper and moderate airflow - verified per JEDEC JESD51-7 testing.
Can the DRV8434PWPR be used with 1.8-V logic controllers?
Yes, the DRV8434PWPR supports 1.8-V, 3.3-V, and 5.0-V logic inputs on STEP, DIR, ENABLE, nSLEEP, and other control pins. Input thresholds are defined by VIH ≥ 1.5 V and VIL ≤ 0.6 V, with 150-mV hysteresis - ensuring reliable interfacing with low-voltage MCUs without level-shifting circuitry.
What protection features are integrated into the DRV8434PWPR?
The DRV8434PWPR integrates VM undervoltage lockout (UVLO), charge pump undervoltage (CPUV), overcurrent protection (OCP) with 4-A trip threshold, open-load detection (OL) at 75 mA, and thermal shutdown (OTSD) at 150°C. All faults assert the open-drain nFAULT pin, allowing immediate system-level response without external monitoring circuitry.
DRV8434PWPR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-PowerTSSOP (0.173", 4.40mm Width)
- 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:
- Printer
- Current - Output:
- 2.5A
- Voltage - Supply:
- 4.5V ~ 48V
- Voltage - Load:
- 4.5V ~ 48V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-HTSSOP
DRV8434PWPR FAQ
1.How can I place an order for DRV8434PWPR through Aetrix?
Please submit a Request for Quotation (RFQ) for DRV8434PWPR 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 DRV8434PWPR reliable?
The price and inventory of DRV8434PWPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DRV8434PWPR is usually 5 days.
3.What payment methods are accepted for DRV8434PWPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DRV8434PWPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DRV8434PWPR?
DRV8434PWPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DRV8434PWPR 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 DRV8434PWPR?
For technical support, including DRV8434PWPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DRV8434PWPR requirements.
6.How does Aetrix verify that DRV8434PWPR is sourced from the original manufacturer or authorized distributors?
All DRV8434PWPR 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 DRV8434PWPR meets industry standards.
7.What is the process for return or replacement of DRV8434PWPR?
All DRV8434PWPR units undergo pre-shipment inspection (PSI). If there is an issue with DRV8434PWPR, 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 DRV8434PWPR part is unused and in its original packaging.
Return procedure for DRV8434PWPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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