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Texas Instruments DRV8705HQRHBRQ1
- Part No.:
- DRV8705HQRHBRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Motor Drivers, Controllers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
DRV8705HQRHBRQ1.pdf
- Description:
- IC MOTOR DRIVER
- Quantity:
- Payment:
- Shipping:
Inventory:3,505
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Product details
Overview
DRV8705HQRHBRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive H-bridge smart gate driver for N-channel MOSFETs, featuring integrated low-side current sense amplification, 4.9V–37V operation, adjustable 0.5–62mA peak gate drive current, and hardware (H/W) interface control mode. It enables robust brushed DC motor control in power window, sunroof, and seat modules.
For engineers reviewing the DRV8705HQRHBRQ1 datasheet, DRV8705HQRHBRQ1 pinout, DRV8705HQRHBRQ1 application, or DRV8705HQRHBRQ1 equivalent, key selection criteria include its H/W-only interface configuration, fixed 4µs VDS/VGS blanking, cycle-by-cycle fault response, and absence of SPI register access-distinguishing it from the SPI variant DRV8705S-Q1.
Technical Context
The DRV8705HQRHBRQ1 implements a hardware-controlled H-bridge gate driver with integrated doubler charge pump for high-side gate bias and linear regulator for low-side drive. Its smart architecture enforces handshake-based dead time to prevent shoot-through and supports four PWM input modes via external resistor programming on the MODE pin.
It integrates a low-side shunt amplifier with four selectable gains (10/20/40/80 V/V), fixed 4 µs blanking, and VAREF/2 output bias. Protection includes PVDD undervoltage lockout (4.625 V threshold), VCP undervoltage detection (2.5 V), VDS overcurrent monitoring with fixed deglitch (4 µs), and thermal warning/shutdown at TJ ≥ 150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage | 4.9 V to 37 V - Supports full automotive battery range including cold-crank and load-dump conditions. |
| Gate Drive Current | 0.5 mA to 62 mA peak source/sink - Configurable via 6-level IDRIVE pin to match MOSFET Qg and switching speed requirements. |
| Current Sense Gain | 10, 20, 40, or 80 V/V - Set by GAIN pin resistor; enables precise motor current measurement across 1–100 mΩ shunts. |
| VDS Blanking Time | Fixed 4 µs - Prevents false overcurrent trips during MOSFET switching transitions. |
| Thermal Shutdown | 150°C junction temperature - Protects device and external FETs under sustained overload or poor heatsinking. |
| Ambient Temp Range | –40°C to +125°C - Qualified per AEC-Q100 Grade 1 for under-hood and cabin-mounted automotive applications. |
| Package | VQFN-32 (5.0 mm × 5.0 mm) with wettable flanks - Enables automated optical inspection (AOI) and reliable solder joint formation in automotive PCB assembly. |
Pinout & Package
VQFN-32 package (RHB), 5.0 mm × 5.0 mm, with exposed thermal pad. Wettable flanks support IPC-A-610 Class 3 solder joint inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND, AGND | Ground reference | Separate analog/digital ground pins require low-impedance star connection to minimize noise coupling into current sense path. |
| PVDD | Main driver supply | Connects directly to bridge bus voltage (e.g., 12 V or 24 V battery); requires ≥10 µF bulk + 0.1 µF ceramic decoupling. |
| DVDD | Digital logic supply | 3.0–5.5 V supply for internal logic and SDO output; bypass with 1.0 µF ceramic capacitor to GND. |
| GH1, GH2 | High-side gate outputs | Drive gates of two external high-side N-MOSFETs; each referenced to SH1/SH2 for accurate VGS control. |
| GL1, GL2 | Low-side gate outputs | Drive gates of two external low-side N-MOSFETs; each referenced to SL1/SL2 for accurate VGS control. |
| SH1, SH2, SL1, SL2 | Source sense inputs | Provide Kelvin connections to MOSFET sources for accurate VGS monitoring and VDS sensing during conduction. |
| SP, SN | Shunt amplifier inputs | Differential inputs for low-side current shunt resistor; common-mode range –2 V to +2 V supports bidirectional current sensing. |
| SO | Amplifier output | Analog output scaled by selected gain (10–80 V/V); connects directly to MCU ADC with 0.25–(VAREF–0.25) V linear range. |
| DRVOFF | Driver disable | Active-high pin that forces all gate drivers low regardless of PWM inputs-used for emergency shutdown or fail-safe braking. |
| nFAULT | Fault indicator | Open-drain output pulled low on any fault (overvoltage, overtemperature, VDS/VGS fault); requires external pullup to DVDD or VAREF. |
| IN1/EN, IN2/PH, nHIZ1, nHIZ2, nSLEEP | Digital control inputs | Hardware-configured logic-level inputs define PWM mode, half/full-bridge operation, and sleep entry; internal pulldowns ensure safe default state. |
| GAIN, IDRIVE, MODE | Multi-level analog config | Resistor-programmed pins set amplifier gain, gate current level, and PWM input mode-eliminates need for MCU firmware configuration. |
Key Features
| Feature | Design Value |
|---|---|
| H/W-only interface | Eliminates SPI bus overhead and MCU firmware dependency-ideal for cost-sensitive, safety-critical automotive modules with minimal microcontroller resources. |
| Integrated doubler charge pump | Generates stable high-side gate voltage up to 10.5 V above PVDD, enabling 100% duty-cycle operation without external bootstrap components. |
| Handshake dead-time control | Hardware-enforced minimum dead time prevents shoot-through without requiring precise timing calibration in MCU firmware. |
| Cycle-by-cycle VDS fault response | Immediate gate shutdown on detected drain-source overcurrent-prevents MOSFET destruction during short-circuit events in motor windings or wiring. |
| Offline open-load diagnostics | Detects disconnected motor leads during startup or standby using internal test currents-enables early failure reporting before actuation. |
Applications
| Power Window Lift | Power Sunroof |
|---|---|
Use Scenario: Bidirectional control of brushed DC motor driving window glass vertical movement with soft-start and stall detection. IC Role / Device Role / Timing Role: H-bridge gate driver with integrated current sensing provides real-time motor current feedback to MCU for position estimation and jam detection. Use Value: Eliminates need for external current-sense op-amp and discrete gate drivers-reducing BOM count and PCB area while meeting ASIL-B functional safety requirements. | Use Scenario: Controlled opening/closing of panoramic sunroof motor with anti-pinch functionality and end-stop detection. IC Role / Device Role / Timing Role: Hardware-mode gate driver delivers deterministic PWM timing and fast fault response (<1 µs) critical for mechanical safety compliance. Use Value: Fixed 4 µs VDS blanking and cycle-by-cycle fault handling enable reliable stall detection without firmware latency-meeting ISO 13849 PLd requirements. |
| Power Seat Module | BDC Fuel Pump |
Use Scenario: Multi-axis adjustment of automotive seats using multiple brushed DC motors for fore/aft, recline, and lumbar functions. IC Role / Device Role / Timing Role: Dual H-bridge driver controls two independent motors simultaneously; low quiescent current (3 µA sleep mode) extends battery life in parked vehicle state. Use Value: Integrated thermal warning (TJ ≥ 135°C) allows graceful derating before shutdown-maintaining partial seat function during extended use in hot climates. | Use Scenario: Continuous-duty 12 V or 24 V brushed DC fuel pump with overcurrent protection and dry-run detection. IC Role / Device Role / Timing Role: Gate driver with offline open-load diagnostics confirms pump presence before startup; VDS monitoring detects clogged filter or seized rotor. Use Value: Eliminates need for separate fuel pump controller IC-reducing system cost and improving reliability through integrated protection and diagnostics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar H-bridge gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DRV8705S-Q1 | SPI interface with programmable registers, adjustable VDS blanking (8 settings), and configurable fault responses (4 modes). | Required when dynamic reconfiguration (e.g., gain change mid-operation) or detailed diagnostics logging are needed. | Select DRV8705S-Q1 only if SPI communication and flexible fault management are required; DRV8705HQRHBRQ1 offers lower system complexity and faster time-to-market for fixed-function designs. |
| DRV8706-Q1 | H-bridge variant with inline current sense amplifier (single-ended output), no DRAIN pin, and identical H/W interface. | Used where space-constrained layouts prohibit dual-shunt placement and unidirectional current sensing suffices. | Choose DRV8706-Q1 for compact single-shunt implementations; DRV8705HQRHBRQ1 supports differential shunt sensing for higher accuracy and noise immunity in noisy automotive environments. |
Compared with DRV8705S-Q1 and DRV8706-Q1, the DRV8705HQRHBRQ1 delivers deterministic hardware control, fixed diagnostic timing, and differential current sensing-making it optimal for ASIL-B motor control modules where firmware simplicity and EMI resilience are prioritized over configurability.
Availability
DRV8705HQRHBRQ1 is available at Aetrix Electronics and suitable for automotive power window lift, power sunroof, and power seat modules requiring stable component supply, AEC-Q100 qualification, and long-term production continuity.
Supply support for DRV8705HQRHBRQ1 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 and embedded processing technologies, with leadership in automotive-grade power management and motor control ICs.
The DRV8705-Q1 product line is designed specifically for AEC-Q100-compliant brushed DC motor control in automotive body electronics, integrating gate driving, current sensing, and protection in a single compact package.
FAQ
What interface options does the DRV8705HQRHBRQ1 support?
The DRV8705HQRHBRQ1 supports hardware (H/W) interface only-no SPI capability. Control is implemented via logic-level digital inputs (IN1/EN, IN2/PH, nHIZ1, nHIZ2, nSLEEP) and resistor-programmed analog pins (GAIN, IDRIVE, MODE). This eliminates MCU firmware dependencies and reduces system-level timing complexity compared to SPI variants like DRV8705S-Q1.
Does the DRV8705HQRHBRQ1 include integrated protection features?
Yes, the DRV8705HQRHBRQ1 includes comprehensive protection: PVDD undervoltage lockout (4.625 V), VCP undervoltage detection (2.5 V), VDS overcurrent monitoring with 4 µs deglitch, VGS gate fault detection, thermal warning (TJ ≥ 135°C) and shutdown (TJ ≥ 150°C), offline open-load and short-circuit diagnostics, and dedicated DRVOFF emergency shutdown pin.
How is current sensing implemented in the DRV8705HQRHBRQ1?
The DRV8705HQRHBRQ1 integrates a low-side differential current shunt amplifier with four selectable gains (10/20/40/80 V/V) set by the GAIN pin. Inputs SP/SN accept ±2 V common-mode voltage; output SO provides rail-to-rail analog signal referenced to VAREF/2, supporting direct connection to MCU ADCs with 0.25–(VAREF–0.25) V linear range.
What is the purpose of the DRAIN pin on the DRV8705HQRHBRQ1?
The DRAIN pin on the DRV8705HQRHBRQ1 senses the common drain node of the external H-bridge MOSFETs. It enables VDS overcurrent monitoring for both high-side and low-side FETs, supports offline open-load diagnostics, and contributes to accurate VGS measurement by providing a stable reference for SH1/SH2 sense inputs.
Can the DRV8705HQRHBRQ1 drive both high-side and low-side N-channel MOSFETs?
Yes, the DRV8705HQRHBRQ1 is designed to drive two high-side and two low-side N-channel MOSFETs in an H-bridge configuration. It uses an integrated doubler charge pump to generate sufficient gate voltage for high-side FETs and a linear regulator for low-side drive-enabling full 100% duty-cycle operation without external bootstrap circuitry.
DRV8705HQRHBRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Motor Type - Stepper:
- Bipolar
- Motor Type - AC, DC:
- Brushed DC
- Function:
- Controller - Commutation, Direction Management
- Output Configuration:
- Pre-Driver - Half Bridge (2)
- Interface:
- Hardwired (HW)
- Technology:
- Power MOSFET
- Step Resolution:
- -
- Applications:
- -
- Current - Output:
- 15mA
- Voltage - Supply:
- 4.9V ~ 37V
- Voltage - Load:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 32-VQFN (5x5)
DRV8705HQRHBRQ1 FAQ
1.How can I place an order for DRV8705HQRHBRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for DRV8705HQRHBRQ1 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 DRV8705HQRHBRQ1 reliable?
The price and inventory of DRV8705HQRHBRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DRV8705HQRHBRQ1 is usually 5 days.
3.What payment methods are accepted for DRV8705HQRHBRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DRV8705HQRHBRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DRV8705HQRHBRQ1?
DRV8705HQRHBRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DRV8705HQRHBRQ1 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 DRV8705HQRHBRQ1?
For technical support, including DRV8705HQRHBRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DRV8705HQRHBRQ1 requirements.
6.How does Aetrix verify that DRV8705HQRHBRQ1 is sourced from the original manufacturer or authorized distributors?
All DRV8705HQRHBRQ1 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 DRV8705HQRHBRQ1 meets industry standards.
7.What is the process for return or replacement of DRV8705HQRHBRQ1?
All DRV8705HQRHBRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with DRV8705HQRHBRQ1, 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 DRV8705HQRHBRQ1 part is unused and in its original packaging.
Return procedure for DRV8705HQRHBRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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