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Texas Instruments DRV8703DQRHBTQ1
- Part No.:
- DRV8703DQRHBTQ1
- Manufacturer:
- Texas Instruments
- Category:
- Motor Drivers, Controllers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
DRV8703DQRHBTQ1.pdf
- Description:
- IC MOTOR DRIVER 5.5V-45V 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:529
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Product details
Overview
DRV8703DQRHBTQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive half-bridge gate driver that drives two external N-channel MOSFETs for unidirectional brushed-DC motor, fuel pump, solenoid, or relay control. It operates from 5.5 V to 45 V, supports 100% PWM duty cycle, integrates PWM current regulation with adjustable VREF-based chopping, and features SPI configuration interface and watchdog timer.
For engineers reviewing the DRV8703DQRHBTQ1 datasheet, DRV8703DQRHBTQ1 pinout, DRV8703DQRHBTQ1 application, or DRV8703DQRHBTQ1 equivalent, key selection criteria include its 32-pin VQFN package with wettable flanks, programmable dead time (120–960 ns), configurable gate drive current (up to 440 mA sink), integrated shunt amplifier (gain selectable 9.75–81 V/V), and automotive-grade protection suite including UVLO, OCP, TSD, and watchdog fault reporting.
Technical Context
The DRV8703DQRHBTQ1 implements a Smart Gate Drive architecture with programmable slew-rate control and adaptive dead-time adjustment to prevent shoot-through while minimizing EMI. Its integrated charge pump enables full 100% duty-cycle operation and supports reverse-battery switch driving.
Unlike the pin-compatible DRV8702D-Q1, the DRV8703DQRHBTQ1 adds SPI serial interface (nSCS, SCLK, SDI, SDO), watchdog timer with dedicated nWDFLT output, and register-controlled current-sense gain (GAIN_CS) and overcurrent threshold (VDS_LEVEL), enabling dynamic configuration of current regulation and fault response in real time.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 5.5 V to 45 V - supports wide automotive battery range including cold-crank (5.5 V) and load-dump (45 V) conditions. |
| Operating Temperature | –40°C to +125°C ambient - AEC-Q100 Grade 1 qualified for under-hood automotive applications. |
| Gate Drive Current | Up to 440 mA sink (high-side) - configurable via 3-bit IDRIVE register to match FET gate charge and switching speed requirements. |
| Dead Time | 120 ns to 960 ns - selectable via 2-bit TDEAD register to balance shoot-through prevention and efficiency across FET types. |
| Current Sense Gain | 9.75× to 81× - four programmable gains (GAIN_CS[1:0]) enable precise current regulation across 56 mV–450 mV sense resistor voltage ranges. |
| OCP Threshold | 0.06 V to 0.96 V - eight programmable VDS_LEVEL settings allow fine-tuned overcurrent trip points for high- and low-side FETs. |
| SPI Interface | 4-wire (nSCS/SCLK/SDI/SDO) - enables real-time register read/write for diagnostics, gain reconfiguration, and fault status polling. |
Pinout & Package
DRV8703DQRHBTQ1 uses a 32-pin VQFN (RHB) package with 5.00 mm × 5.00 mm body size and wettable flanks for automated optical inspection. Thermal pad on underside requires solder connection to PCB ground plane for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1 / IN2 | Control input pair | Logic-level inputs defining half-bridge state (H-H, L-L, H-L, L-H); internal pulldown ensures safe default. |
| GH / GL | High-/low-side gate drivers | Direct FET gate connections with ±440 mA peak sink capability; clamped at +17 V / –0.7 V to protect gate oxide. |
| SH / SN / SP / SO | Shunt amplifier interface | SH = high-side source node; SN/SP = differential sense inputs; SO = amplified output (gain-configurable) for current feedback. |
| VREF | Chopping reference input | Analog voltage setting PWM off-time and regulated current level; 0.3–3.6 V range defines target winding current. |
| nFAULT / nWDFLT | Fault reporting outputs | Open-drain signals pulled low on UVLO, OCP, TSD, GDF, or watchdog timeout; require external pullups. |
| nSCS / SCLK / SDI / SDO | SPI interface | Enable register access for GAIN_CS, VDS_LEVEL, TDEAD, IDRIVE, and fault status; supports diagnostics and runtime tuning. |
| nSLEEP | Low-power mode control | Pull low to enter <14 µA sleep mode; FETs placed in high-impedance state with active pulldowns to prevent dv/dt turn-on. |
| VM / VCP / CPH / CPL | Power supply nodes | VM = motor supply (5.5–45 V); VCP = charge-pump output (up to 24.5 V); CPH/CPL = flying capacitor switching nodes. |
Key Features
| Feature | Design Value |
|---|---|
| Smart Gate Drive Architecture | Eliminates need for external gate resistors/Zeners by integrating programmable slew rate, adaptive dead time, and active/passive pulldowns. |
| Integrated PWM Current Regulation | Fixed off-time chopping using VREF and shunt amplifier output enables precise, stable current control without external controller. |
| Configurable Overcurrent Protection | VDS-level sensing with 8-step programmable threshold (0.06–0.96 V) allows matching to diverse FET RDS(on) and sense resistor values. |
| Watchdog Timer with Fault Output | Dedicated nWDFLT pin reports communication loss or firmware hang; resets device if SPI activity ceases beyond timeout window. |
| Automotive-Grade Protection Suite | Includes VM/DVDD/AVDD UVLO, charge-pump UV, thermal shutdown (150°C), gate-driver fault detection, and ESD robustness (HBM ±2 kV). |
Applications
| Fuel Pump Control | Brushed DC Motor Drive |
|---|---|
Use Scenario: Regulated 12 V/24 V fuel pump actuation in gasoline/diesel powertrain systems requiring precise flow control and stall detection. IC Role / Device Role / Timing Role: Half-bridge gate driver with integrated current regulation and VDS-based OCP to monitor pump winding current and detect clogged/no-flow conditions. Use Value: Enables closed-loop current control without external microcontroller intervention; VDS_LEVEL register allows field calibration for aging pump resistance. | Use Scenario: Bidirectional speed/torque control of HVAC blower, seat adjuster, or sunroof motors in passenger compartments. IC Role / Device Role / Timing Role: PWM-driven half-bridge driver with programmable dead time and slew rate to minimize EMI in noise-sensitive cabin environments. Use Value: SPI-configurable GAIN_CS and TDEAD allow optimization per motor invariants; nWDFLT ensures fail-safe shutdown during CAN bus communication failure. |
| Relay/Solenoid Actuation | Unipolar Load Switching |
Use Scenario: High-reliability switching of starter relays, transmission solenoids, or brake actuators where contact welding and coil overtemperature must be prevented. IC Role / Device Role / Timing Role: High-side/low-side gate driver with integrated current sense and thermal warning (120–145°C) to detect coil degradation before failure. Use Value: VREF-based current limiting prevents inrush damage; TSD (150°C) and thermal hysteresis (20°C) ensure controlled shutdown and automatic recovery. | Use Scenario: Power switching for LED arrays, heating elements, or diagnostic lamps in instrument clusters or lighting modules. IC Role / Device Role / Timing Role: Robust half-bridge driver supporting 100% duty cycle and reverse-battery protection via integrated charge pump. Use Value: Charge-pump output (VCP) can drive external reverse-battery MOSFET; GH/GL clamping protects against transients up to ±17 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar half-bridge gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DRV8702DQRHBTQ1 | No SPI interface; no watchdog timer; fixed shunt amplifier gain (19.8 V/V); no register-based VDS_LEVEL or TDEAD control. | Limited to static configurations; unsuitable for systems requiring runtime diagnostics or adaptive current thresholds. | Select when cost sensitivity outweighs configurability needs and system firmware handles current regulation externally. |
| TPS6H3515DQPRQ1 | Single-channel high-side driver only; no low-side gate drive; no integrated current sense amplifier or PWM chopping logic. | Requires external low-side switch and current-sense circuitry; lacks closed-loop regulation capability. | Select only for high-side-only loads where independent control of both FETs is unnecessary and external sensing is acceptable. |
Compared with DRV8702DQRHBTQ1, the DRV8703DQRHBTQ1 adds SPI configurability and watchdog safety; compared with TPS6H3515DQPRQ1, it provides full half-bridge integration with current regulation-making it the only option among the three capable of autonomous brushed-DC motor current control in automotive environments.
Availability
DRV8703DQRHBTQ1 is available at Aetrix Electronics and suitable for fuel pump control, brushed DC motor drive, solenoid actuation, and unipolar load switching requiring stable component supply across automotive production lifecycles.
Supply support for DRV8703DQRHBTQ1 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 company specializing in analog, embedded processing, and automotive ICs, with decades of leadership in motor control and power management solutions.
The DRV870x-Q1 product line was designed specifically for AEC-Q100-compliant automotive half-bridge applications-including fuel pumps, HVAC actuators, and transmission solenoids-where reliability, integrated protection, and current regulation are critical.
FAQ
What is the primary function of the DRV8703DQRHBTQ1 in an automotive system?
The DRV8703DQRHBTQ1 serves as an automotive-qualified half-bridge gate driver that controls two external N-channel MOSFETs to drive unidirectional brushed-DC motors, fuel pumps, solenoids, or relays. It integrates PWM current regulation, SPI configuration, watchdog monitoring, and comprehensive fault protection-enabling robust, self-contained motor control without external microcontroller intervention for basic functions. The DRV8703DQRHBTQ1 is optimized for under-hood and cabin applications demanding AEC-Q100 Grade 1 reliability.
How does the SPI interface on the DRV8703DQRHBTQ1 improve system design versus the DRV8702D-Q1?
The SPI interface on the DRV8703DQRHBTQ1 enables real-time register access to configure current-sense gain (GAIN_CS), overcurrent threshold (VDS_LEVEL), dead time (TDEAD), gate drive strength (IDRIVE), and fault status-allowing dynamic adaptation to motor aging, temperature drift, or diagnostic requirements. In contrast, the DRV8702D-Q1 uses fixed analog configuration (resistor-based VDS and gain), making the DRV8703DQRHBTQ1 essential for systems requiring field-updatable protection thresholds or closed-loop current tuning without hardware changes.
What protection features are implemented in the DRV8703DQRHBTQ1 and how are they signaled?
The DRV8703DQRHBTQ1 implements supply UVLO, charge-pump UV, overcurrent protection (OCP) via VDS or shunt amplifier, thermal shutdown (TSD), gate-driver fault (GDF), and watchdog timeout. All faults are reported on the open-drain nFAULT pin, while watchdog-specific faults use the dedicated nWDFLT pin. Both require external pullup resistors and assert low-active signals, allowing microcontrollers to distinguish between general system faults and communication failures-enhancing diagnostic coverage for ISO 26262 ASIL-B compliance.
Can the DRV8703DQRHBTQ1 support 100% PWM duty cycle, and what enables this capability?
Yes, the DRV8703DQRHBTQ1 supports true 100% PWM duty cycle operation. This is enabled by its integrated charge-pump circuit (VCP, CPH, CPL pins), which generates a boosted gate-drive voltage higher than the motor supply (VM). The charge pump delivers up to 24.5 V at VM = 13.5 V, ensuring sufficient VGS margin to fully enhance external high-side N-MOSFETs even when VM approaches the gate threshold-critical for fuel pump hold-mode and solenoid latching applications where continuous conduction is required.
What is the role of the VREF pin on the DRV8703DQRHBTQ1 and how does it affect motor current regulation?
The VREF pin on the DRV8703DQRHBTQ1 sets the target current for the integrated PWM current-regulation loop. The voltage applied (0.3 V to 3.6 V) directly determines the off-time in fixed-frequency chopping mode, establishing the average motor winding current. Combined with the programmable shunt amplifier gain (GAIN_CS), VREF allows precise, resistor-free current calibration-e.g., 1.0 V on VREF with 20× gain yields ~50 mV across the sense resistor, corresponding to a defined current value based on Rsense. This eliminates external DACs or op-amps in basic current-control designs.
DRV8703DQRHBTQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Last Time Buy
- Motor Type - Stepper:
- -
- Motor Type - AC, DC:
- Brushed DC
- Function:
- Driver - Fully Integrated, Control and Power Stage
- Output Configuration:
- Half Bridge (2)
- Interface:
- PWM
- Technology:
- Power MOSFET
- Step Resolution:
- -
- Applications:
- Brushed DC
- Current - Output:
- -
- Voltage - Supply:
- 5.5V ~ 45V
- Voltage - Load:
- -
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 32-VQFN (5x5)
DRV8703DQRHBTQ1 FAQ
1.How can I place an order for DRV8703DQRHBTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for DRV8703DQRHBTQ1 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 DRV8703DQRHBTQ1 reliable?
The price and inventory of DRV8703DQRHBTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DRV8703DQRHBTQ1 is usually 5 days.
3.What payment methods are accepted for DRV8703DQRHBTQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DRV8703DQRHBTQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DRV8703DQRHBTQ1?
DRV8703DQRHBTQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DRV8703DQRHBTQ1 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 DRV8703DQRHBTQ1?
For technical support, including DRV8703DQRHBTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DRV8703DQRHBTQ1 requirements.
6.How does Aetrix verify that DRV8703DQRHBTQ1 is sourced from the original manufacturer or authorized distributors?
All DRV8703DQRHBTQ1 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 DRV8703DQRHBTQ1 meets industry standards.
7.What is the process for return or replacement of DRV8703DQRHBTQ1?
All DRV8703DQRHBTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with DRV8703DQRHBTQ1, 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 DRV8703DQRHBTQ1 part is unused and in its original packaging.
Return procedure for DRV8703DQRHBTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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