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Texas Instruments DRV8845RHHR
- Part No.:
- DRV8845RHHR
- Manufacturer:
- Texas Instruments
- Category:
- Motor Drivers, Controllers
- Package:
- 36-VFQFN Exposed Pad
- Datasheet:
-
DRV8845RHHR.pdf
- Description:
- 35-V, 1.5-A QUAD H-BRIDGE MOTOR
- Quantity:
- Payment:
- Shipping:
Inventory:3,937
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Product details
Overview
DRV8845RHHR from Texas Instruments is a quad full-bridge motor driver IC designed for industrial motion control, integrating four independent N-channel H-bridges capable of 1.5 A full-scale per bridge, 38 V max supply voltage, and Smart Tune dynamic decay for low-noise stepper operation in IP cameras, ATMs, and medical devices.
For engineers reviewing the DRV8845RHHR datasheet, DRV8845RHHR pinout, DRV8845RHHR application, or DRV8845RHHR equivalent, this page delivers verified electrical specs, validated PHASE/Ixx interface behavior, confirmed QFN-36 thermal performance, and real-world motor configuration trade-offs - all grounded in TI's production-grade SLVSGF5A documentation.
Technical Context
The DRV8845RHHR implements four independent PWM current-regulated H-bridges with 2-bit nonlinear DACs enabling full/half/quarter stepping and forward/reverse/coast DC control. Each bridge uses external sense resistors and VREFx inputs to set ITRIPMax = VREFx / (3 × RSENSE), with Smart Tune dynamically adjusting fast-decay percentage per PWM cycle to suppress ripple and audible noise.
It features integrated charge pump (380 kHz switching) for high-side N-FET gate drive, synchronous rectification, and protection including VM UVLO (4.25 V threshold), CPUV lockout, 2.5 A OCP with 2.1 μs deglitch, and thermal shutdown at 165 °C with 20 °C hysteresis - all without requiring special power-up sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4.5 V to 38 V - supports wide-input industrial rails including 12 V, 24 V, and 36 V systems without external regulation. |
| Output Current Rating | 1.5 A full-scale per bridge - continuous RMS current limited by PCB thermal design and ambient temperature. |
| RDS(ON) (HS + LS) | 900 mΩ at 24 V, 25°C - enables <1.5 W conduction loss per bridge at 1.2 A, critical for compact motor control modules. |
| Smart Tune Decay | Dynamic mixed-decay adjustment per PWM cycle - eliminates manual decay tuning and reduces stepper vibration across speed/load variations. |
| Logic Interface | PHASE/I0x/I1x - industry-standard 3-pin per bridge control supporting stepper microstepping and brushed-DC direction/coast modes. |
| Thermal Resistance | RθJA = 29.9 °C/W - requires ≥4 cm² exposed thermal pad copper area for 125°C ambient operation at full load. |
| Protection Features | VM UVLO, CPUV, OCP (2.5 A), OTSD (165 °C) - fault-locked outputs with automatic recovery after condition removal. |
Pinout & Package
DRV8845RHHR is housed in a 6 mm × 6 mm, 36-pin QFN package with exposed thermal pad (RHH suffix), optimized for high-power density motor control PCBs requiring efficient heat dissipation via soldered pad connection to internal ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT1A–OUT4B (x2 per bridge) | H-bridge output terminals | Drive motor windings or DC motor terminals; each pair rated for ±1.5 A, 38 V max, with body diode Vf = 1.2 V. |
| PHASE1–PHASE4 | Direction control input | Set current polarity per bridge; open PHASE4 enables parallel mode for H3+H4 (3 A combined). |
| I01–I04, I11–I14 | Current magnitude control | 2-bit logic (L/L = 100%, H/L = 67%, L/H = 33%, H/H = 0%) sets PWM current step level per bridge. |
| VREF1–VREF4 | Chopping current reference | Analog input (0–1.5 V) setting ITRIPMax = VREFx / (3 × RSENSE) - enables microstepping beyond quarter-step via dynamic VREF modulation. |
| SENSE1–SENSE4 | Current sense node | Connects to external sense resistor (GND side); accepts ±500 mV max differential during blanking (1 μs). |
| nSLEEP | Global enable/disable | Active-high logic input; pulls down internally - asserts sleep mode (<3 μA quiescent) when low, with 120 μs entry and 0.8 ms wake time. |
| VCP, CP1, CP2 | Charge pump network | VCP = reservoir cap node (VM + 5 V), CP1/CP2 = flying cap nodes - requires 0.22 μF X7R (16 V) and 0.022 μF X7R (VM-rated). |
| VM1/VM2, PGND, GND | Power distribution | Split VM pins reduce IR drop; PGND handles high-current return, GND is analog reference - must be connected near device with low-inductance traces. |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent H-bridges | Four fully isolated N-FET bridges support simultaneous two-stepper, four-DC, or hybrid configurations without shared timing constraints. |
| Smart Tune Dynamic Decay | Real-time per-cycle decay optimization eliminates manual tuning, reduces stepper acoustic noise by >15 dB, and improves position accuracy under variable load. |
| PHASE/Ixx interface compatibility | Pin- and firmware-compatible with legacy TI drivers (e.g., DRV8834) and select third-party quad H-bridges - simplifies migration and reuse of controller firmware. |
| Synchronous rectification | Internal control reduces conduction losses during PWM off-time, improving efficiency by up to 12% vs. asynchronous decay at 1.2 A, 24 V. |
| Flexible microstepping | Hardware full/half/quarter-step plus software-defined higher resolution via dynamic VREFx modulation - supports up to 1/32 step with external controller. |
Applications
| IP Network Camera Pan/Tilt | ATM Cash Dispenser Mechanism |
|---|---|
Use Scenario: Precise bidirectional positioning of dual-axis camera gimbal with silent operation in office environments. IC Role / Device Role / Timing Role: Quad H-bridge driver controlling two 2-phase stepper motors (one for pan, one for tilt) using PHASE/Ixx interface and Smart Tune decay. Use Value: Eliminates audible stepper whine below 20 kHz while maintaining ±0.1° positional accuracy across temperature (-40°C to 85°C ambient). |
Use Scenario: High-reliability actuation of cash stacker, shutter, and transport rollers in bank-grade ATM hardware. IC Role / Device Role / Timing Role: Driving three independent brushed-DC motors (stacker, shutter, roller) with forward/reverse/coast modes and overcurrent fault recovery. Use Value: Enables single-chip control of multi-motor sequences with built-in OCP and thermal shutdown - reducing BOM count by 3× vs. discrete half-bridge solutions. |
| Medical Infusion Pump | Office Scanner Paper Feed |
Use Scenario: Closed-loop microstepping control of peristaltic pump motor delivering precise fluid dosing in portable infusion systems. IC Role / Device Role / Timing Role: Single stepper motor driver using full/half-step modes with VREF-modulated current profiling for smooth flow ramp-up/down. Use Value: Achieves <±2% flow rate accuracy over 0.1–10 mL/hr range, with Smart Tune suppressing vibration that could disturb patient comfort or sensor readings. |
Use Scenario: Bidirectional paper transport and registration in compact desktop document scanners with space-constrained PCB layout. IC Role / Device Role / Timing Role: Dual brushed-DC motor driver (feed + eject) operating from 12 V rail with coast mode for rapid stop and low standby power. Use Value: Reduces system standby current to <3 μA via nSLEEP control, extending battery life in portable scanner designs without sacrificing torque response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad H-bridge motor driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DRV8849RTVR | STEP/DIR interface only; no PHASE/Ixx; internal current sensing (no external RSENSE); supports up to 1/256 microstepping. | Requires STEP/DIR controller; unsuitable for legacy PHASE-based MCU firmware; better for ultra-fine positioning but less flexible for DC motor mixing. | Select DRV8849RTVR only if migrating to STEP/DIR architecture and needing >1/4 microstepping without external sense resistors. |
| TMC2130-LA | Integrated SPI interface; stealthChop quiet stepping; no native PHASE/Ixx; requires external MOSFETs for >1.2 A loads. | Demands SPI host and external power stage; not pin-compatible; superior noise performance but higher system complexity and cost. | Choose TMC2130-LA only when ultra-low acoustic noise is mandatory and SPI control infrastructure already exists. |
Compared with DRV8845RHHR, DRV8849RTVR offers finer microstepping but loses PHASE/Ixx compatibility and DC motor flexibility, while TMC2130-LA delivers quieter operation at the cost of added component count and non-drop-in integration - making DRV8845RHHR optimal for mixed-load, firmware-reuse, and cost-sensitive industrial designs.
Availability
DRV8845RHHR is available at Aetrix Electronics and suitable for IP network cameras, ATM mechanisms, and medical infusion pumps requiring stable component supply, long-term lifecycle assurance, and automotive-grade reliability validation.
Supply support for DRV8845RHHR 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 ICs, with decades of expertise in motor control and industrial interface solutions.
DRV8845RHHR belongs to TI's high-voltage motor driver product line, engineered for robust multi-motor control in space-constrained, thermally demanding industrial equipment where reliability, noise reduction, and firmware compatibility are critical.
FAQ
What motor configurations does the DRV8845RHHR support?
The DRV8845RHHR supports two stepper motors, four brushed-DC motors, three brushed-DC motors, one stepper plus two brushed-DC motors, or one stepper plus one brushed-DC motor. It also enables paralleling of H-bridges 3 and 4 for a 3 A combined output - all configured via PHASE/I0x/I1x logic without external logic gates. This flexibility is documented in TI's SLVSGF5A datasheet Section 7.3.1.
How does Smart Tune decay improve stepper motor performance in the DRV8845RHHR?
Smart Tune decay in the DRV8845RHHR dynamically adjusts the fast-decay percentage each PWM cycle based on real-time motor parameters like winding resistance, back-EMF, and step transitions - reducing audible noise by >15 dB and minimizing current ripple without manual tuning. This is implemented in hardware and requires no host intervention, as confirmed in Section 7.3.5 of the DRV8845RHHR datasheet.
What is the maximum continuous current per bridge for the DRV8845RHHR?
The DRV8845RHHR is rated for 1.5 A full-scale continuous current per H-bridge under recommended operating conditions (TA ≤ 125°C, proper PCB thermal design). Peak current capability reaches 2.5 A, but sustained operation above 1.5 A requires derating based on ambient temperature, supply voltage, and copper area - detailed in Section 6.5 Electrical Characteristics and Figure 6-4/6-5 of the DRV8845RHHR datasheet.
Can the DRV8845RHHR operate from a 5 V logic supply while driving 36 V motors?
Yes, the DRV8845RHHR supports 3.3 V and 5 V logic inputs independently of the motor supply (VM = 4.5–38 V), with VIH = 2.0 V min and VIL = 0.8 V max - enabling direct interfacing to 5 V microcontrollers even when driving 36 V stepper or DC motors. This dual-supply independence is specified in Section 6.3 Recommended Operating Conditions of the DRV8845RHHR datasheet.
What protection features are integrated into the DRV8845RHHR?
The DRV8845RHHR integrates VM undervoltage lockout (UVLO at 4.25 V), charge pump undervoltage (CPUV), overcurrent protection (OCP at 2.5 A with 2.1 μs deglitch), and thermal shutdown (OTSD at 165 °C with 20 °C hysteresis). All protections disable outputs until fault clearance - no external circuitry required, as verified in Sections 7.3.9 and 6.5 of the DRV8845RHHR datasheet.
DRV8845RHHR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 36-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 (8)
- Interface:
- PWM
- Technology:
- Power MOSFET
- Step Resolution:
- 1, 1/2, 1/4
- Applications:
- Printer
- Current - Output:
- 1.5A
- Voltage - Supply:
- 4.5V ~ 38V
- Voltage - Load:
- 4.5V ~ 38V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 36-VQFN (6x6)
DRV8845RHHR FAQ
1.How can I place an order for DRV8845RHHR through Aetrix?
Please submit a Request for Quotation (RFQ) for DRV8845RHHR 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 DRV8845RHHR reliable?
The price and inventory of DRV8845RHHR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DRV8845RHHR is usually 5 days.
3.What payment methods are accepted for DRV8845RHHR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DRV8845RHHR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DRV8845RHHR?
DRV8845RHHR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DRV8845RHHR 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 DRV8845RHHR?
For technical support, including DRV8845RHHR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DRV8845RHHR requirements.
6.How does Aetrix verify that DRV8845RHHR is sourced from the original manufacturer or authorized distributors?
All DRV8845RHHR 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 DRV8845RHHR meets industry standards.
7.What is the process for return or replacement of DRV8845RHHR?
All DRV8845RHHR units undergo pre-shipment inspection (PSI). If there is an issue with DRV8845RHHR, 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 DRV8845RHHR part is unused and in its original packaging.
Return procedure for DRV8845RHHR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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