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Texas Instruments DRV8434AQWRGERQ1
- Part No.:
- DRV8434AQWRGERQ1
- Manufacturer:
- Texas Instruments
- Category:
- Motor Drivers, Controllers
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
DRV8434AQWRGERQ1.pdf
- Description:
- AUTOMOTIVE 48V 2.5A BIPOLAR STEP
- Quantity:
- Payment:
- Shipping:
Inventory:2,970
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Product details
Overview
DRV8434AQWRGERQ1 from Texas Instruments is an AEC-Q100 qualified automotive bipolar stepper motor driver IC with integrated current sensing, 1/256 microstepping, smart tune ripple control decay, and GPIO-based stall detection. It delivers 2.5A full-scale output current at 24V, operates from 4.5V to 48V, and features ±4% full-scale current accuracy without external sense resistors - used in headlight position adjustment and HVAC stepper actuation.
For engineers reviewing the DRV8434AQWRGERQ1 datasheet, DRV8434AQWRGERQ1 pinout, DRV8434AQWRGERQ1 application, or DRV8434AQWRGERQ1 equivalent, key selection considerations include its VQFN-24 package, STEP/DIR interface simplicity, integrated stall detection using STL_MODE/STL_REP/TRQ_CNT pins, and functional safety documentation support for ASIL-B system integration.
Technical Context
The DRV8434AQWRGERQ1 integrates two N-channel H-bridge drivers, a microstepping indexer, and current-sense MOSFETs - eliminating external sense resistors while achieving ±4% full-scale current accuracy. Its smart tune ripple control uses variable off-time slow-decay PWM with ITRIP/IVALLEY thresholds to minimize current distortion and audible noise.
Stall detection operates sensorlessly via back-EMF phase-shift analysis, configured through three dedicated pins (STL_MODE, STL_REP, TRQ_CNT/STL_TH) without SPI. Protection includes VM UVLO (4.2V rising), charge pump UVLO, overcurrent (4A peak), open-load detection (100mA threshold), and thermal shutdown (150°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4.5V to 48V - supports 12V/24V/48V automotive battery architectures with UVLO at 4.2V (rising) |
| Output Current Rating | 2.5A full-scale / 1.8A RMS - thermally limited; requires PCB thermal design per RθJB = 16.0°C/W |
| Microstepping Resolution | 1/256 - selectable via M0/M1 pins; enables smooth motion and <30dB audible noise reduction vs full-step |
| Current Sense Accuracy | ±4% full-scale - eliminates need for two 5% external sense resistors, saving >3mm² PCB area and BOM cost |
| RDS(ON) @ 25°C | 330mΩ (HS + LS) - measured as 165mΩ HS + 165mΩ LS, enabling <1.5W conduction loss at 2.5A |
| Stall Detection Interface | Dedicated GPIO-only - uses STL_MODE (mode select), STL_REP (open-drain fault report), TRQ_CNT/STL_TH (analog I/O) - no SPI required |
| Sleep Current | 2μA - achieved via nSLEEP pin; wake-up time 0.7–1.2ms enables rapid response in duty-cycled systems |
Pinout & Package
VQFN-24 package (4mm × 4mm, 0.5mm pitch) with exposed thermal pad - optimized for automotive thermal cycling and board-level reliability under 125°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AOUT1, AOUT2 | Motor winding A outputs | Drive bipolar stepper coil A; each rated for 2.5A peak, connected directly to motor terminals |
| BOUT1, BOUT2 | Motor winding B outputs | Drive bipolar stepper coil B; matched current capability and timing to AOUT pair for balanced torque |
| STEP, DIR, ENABLE | Digital control inputs | STEP rising edge advances microstep; DIR sets direction; ENABLE disables outputs or scales torque count |
| nSLEEP, nFAULT, STL_REP | Open-drain status/control | nSLEEP enters 2μA sleep; nFAULT signals faults (OCP/UVLO/OTSD); STL_REP reports stall events |
| VREF, M0, M1, STL_MODE | Configuration inputs | VREF sets full-scale current (0.05–3.3V); M0/M1 select microstep mode; STL_MODE configures stall algorithm |
| TRQ_CNT/STL_TH | Stall analog I/O | Outputs torque count (12-bit DAC) or accepts stall threshold voltage depending on STL_MODE state |
| VM, PGND, GND, DVDD | Power domains | VM powers H-bridges (4.5–48V); PGND handles high-current return; DVDD regulates 5V logic supply |
Key Features
| Feature | Design Value |
|---|---|
| Integrated current sensing | Eliminates two external 5% power sense resistors, reducing BOM count, PCB area, and power loss by >1.2W at 2.5A |
| Smart tune ripple control | Automatically adjusts off-time and valley current (IVALLEY) to maintain sinusoidal winding current under load variation and temperature drift |
| GPIO-based stall detection | Detects mechanical obstruction or end-of-travel without SPI interface - reduces MCU firmware complexity and pin count |
| Spread spectrum clocking | Reduces peak radiated emissions by >10dB across 150kHz–108MHz band, easing CISPR 25 Class 5 compliance |
| AEC-Q100 Grade 1 | Qualified from –40°C to +125°C ambient; supports functional safety documentation for ISO 26262 ASIL-B system integration |
Applications
| Headlight Position Adjustment | Head-Up Display (HUD) Actuation |
|---|---|
|
Use Scenario: Precise angular positioning of LED projector modules within automotive headlamp assemblies. IC Role / Device Role / Timing Role: Stepper driver executing 1/256 microsteps to achieve <0.05° mechanical resolution with closed-loop stall feedback. Use Value: Enables adaptive beam shaping without external encoders; ±4% current accuracy ensures repeatable torque across temperature. |
Use Scenario: Vertical/horizontal alignment of combiner glass in windshield-projected HUD systems. IC Role / Device Role / Timing Role: Bipolar stepper controller managing dual-axis motion with stall detection to prevent lens jamming during calibration. Use Value: GPIO-based stall reporting (STL_REP) allows real-time obstruction detection without SPI overhead, reducing MCU interrupt latency. |
| HVAC Blend Door Control | Electronic Fuel Injector Actuation |
|
Use Scenario: Motorized air mix and mode doors in automotive climate control systems. IC Role / Device Role / Timing Role: Low-noise stepper driver using smart tune decay to suppress audible whine during cabin airflow modulation. Use Value: Spread spectrum clocking meets CISPR 25 radiated emissions limits; 2μA sleep current extends battery life in accessory mode. |
Use Scenario: Precision metering of fuel flow in gasoline direct injection (GDI) systems using stepper-controlled valves. IC Role / Device Role / Timing Role: High-reliability motor driver operating at 48V supply with overcurrent protection (4A trip) and open-load detection. Use Value: Integrated charge pump (VCP/CPL/CPH) sustains gate drive under low-battery cranking conditions (4.5V VM). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar stepper driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DRV8432AQWRGERQ1 | Same VQFN-24 package and pinout; supports only up to 1/32 microstepping and lacks STL_MODE/STL_REP pins | No GPIO-based stall detection; requires external sensing or MCU-based algorithms for obstruction monitoring | Select when 1/32 resolution suffices and stall detection is handled externally or omitted |
| MP6500GQ-P | 48V-rated, 2.5A full-scale, but uses external sense resistors and offers only 1/16 microstepping; no integrated stall detection | Lacks AEC-Q100 qualification and functional safety documentation; not suitable for ASIL-B systems | Consider for non-automotive industrial stepper applications where cost sensitivity outweighs qualification requirements |
Compared with DRV8434AQWRGERQ1, DRV8432AQWRGERQ1 provides identical packaging and thermal performance but sacrifices 1/256 microstepping and GPIO stall detection, while MP6500GQ-P trades integration and automotive qualification for lower unit cost in non-safety-critical designs.
Availability
DRV8434AQWRGERQ1 is available at Aetrix Electronics and suitable for headlight position adjustment, HVAC blend door control, and electronic fuel injection requiring stable component supply across automotive production lifecycles.
Supply support for DRV8434AQWRGERQ1 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 with focus on automotive, industrial, and personal electronics markets.
The DRV8434A-Q1 product line targets ASIL-B automotive motion control, integrating current sensing, microstepping, and stall detection to simplify ECU design for headlight, HUD, and HVAC actuators.
FAQ
What is the maximum microstepping resolution supported by the DRV8434AQWRGERQ1?
The DRV8434AQWRGERQ1 supports up to 1/256 microstepping, selected via M0 and M1 pin configurations. This resolution enables sub-degree angular positioning in automotive applications like headlight aiming and HUD alignment. The indexer executes all microstep states internally, relieving the host MCU from waveform generation and ensuring precise sinusoidal current profiles without software overhead. DRV8434AQWRGERQ1 achieves this using a built-in sine-weighted DAC referenced to the VREF pin voltage.
How does the DRV8434AQWRGERQ1 implement stall detection without an SPI interface?
The DRV8434AQWRGERQ1 implements stall detection using three dedicated GPIO pins - STL_MODE, STL_REP, and TRQ_CNT/STL_TH - eliminating the need for SPI communication. STL_MODE selects between torque-count, learning, or stall-threshold modes; STL_REP provides open-drain stall event reporting; and TRQ_CNT/STL_TH serves as analog I/O for torque measurement or threshold setting. DRV8434AQWRGERQ1 detects stall by analyzing back-EMF phase shift between current quadrants, enabling real-time obstruction identification in headlight or HVAC systems without additional MCU peripherals.
What is the purpose of the smart tune ripple control feature in the DRV8434AQWRGERQ1?
Smart tune ripple control in the DRV8434AQWRGERQ1 dynamically adjusts PWM off-time and valley current (IVALLEY) to maintain tight regulation of sinusoidal winding current under varying load, temperature, and motor parameters. Unlike fixed-decay schemes, it minimizes current distortion and audible noise while improving torque consistency. DRV8434AQWRGERQ1 implements this using internal current-sense MOSFETs and a ripple-controlled comparator, eliminating external compensation components and simplifying layout. This feature directly enhances motion smoothness in HUD and headlight positioning systems.
Does the DRV8434AQWRGERQ1 require external current sense resistors?
No, the DRV8434AQWRGERQ1 does not require external current sense resistors. It uses an integrated current-sense architecture with matched MOSFETs to replicate motor current, achieving ±4% full-scale accuracy without power-dissipating shunts. This eliminates two 5% tolerance, high-power resistors, saves >3mm² PCB area, reduces BOM cost, and removes associated thermal derating concerns. DRV8434AQWRGERQ1's VREF pin sets the current regulation point, and the internal transimpedance gain (1.32 V/A) converts VREF voltage to full-scale output current.
What protection features are integrated into the DRV8434AQWRGERQ1?
The DRV8434AQWRGERQ1 integrates VM undervoltage lockout (4.2V rising), charge pump undervoltage detection, overcurrent protection (4A peak trip), open-load detection (100mA threshold), thermal shutdown (150°C), and fault reporting via nFAULT. All protections feed into a single open-drain nFAULT pin, simplifying system-level fault handling. DRV8434AQWRGERQ1 also includes blanking time control to prevent false overcurrent trips during switching transitions. These features ensure robust operation in automotive environments subject to load dump, cold crank, and thermal stress.
DRV8434AQWRGERQ1 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:
- Brushless DC (BLDC)
- Function:
- Driver - Fully Integrated, Control and Power Stage
- Output Configuration:
- Half Bridge (4)
- Interface:
- PWM, SPI, Step/Direction
- Technology:
- Power MOSFET
- Step Resolution:
- 1 ~ 1/256
- Applications:
- General Purpose
- Current - Output:
- 1.8A
- Voltage - Supply:
- 4.5V ~ 48V
- Voltage - Load:
- 4.5V ~ 48V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 24-VQFN (4x4)
DRV8434AQWRGERQ1 FAQ
1.How can I place an order for DRV8434AQWRGERQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for DRV8434AQWRGERQ1 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 DRV8434AQWRGERQ1 reliable?
The price and inventory of DRV8434AQWRGERQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DRV8434AQWRGERQ1 is usually 5 days.
3.What payment methods are accepted for DRV8434AQWRGERQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DRV8434AQWRGERQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DRV8434AQWRGERQ1?
DRV8434AQWRGERQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DRV8434AQWRGERQ1 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 DRV8434AQWRGERQ1?
For technical support, including DRV8434AQWRGERQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DRV8434AQWRGERQ1 requirements.
6.How does Aetrix verify that DRV8434AQWRGERQ1 is sourced from the original manufacturer or authorized distributors?
All DRV8434AQWRGERQ1 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 DRV8434AQWRGERQ1 meets industry standards.
7.What is the process for return or replacement of DRV8434AQWRGERQ1?
All DRV8434AQWRGERQ1 units undergo pre-shipment inspection (PSI). If there is an issue with DRV8434AQWRGERQ1, 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 DRV8434AQWRGERQ1 part is unused and in its original packaging.
Return procedure for DRV8434AQWRGERQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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