VNH7040AYTR - 35A H-Bridge Motor Driver | STMicroelectronics
MPN: VNH7040AYTR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.95 | $4.95 |
| 10 | $4.45 | $44.50 |
| 100 | $3.92 | $392.00 |
| 500 | $3.55 | $1,775.00 |
| 1,000 | $3.18 | $3,180.00 |
VNH7040AYTR Overview
What is an H-bridge motor driver? An H-bridge motor driver is a power-integrated circuit that uses four switching elements arranged in an H configuration to drive a brushed DC motor bidirectionally from a single supply rail. It sits in the motor-control signal chain between a low-power MCU (logic-level PWM/direction commands) and a brushed DC or stepper motor, handling the high-current switching that the MCU cannot do directly. Within the broader taxonomy: H-bridge driver -> motor driver -> power management IC -> semiconductor. The VNH7040AY adds diagnostic, current-sense and protection features that a discrete MOSFET H-bridge cannot match in the same footprint.
Key features include 35 A continuous output current, integrated current sensing with analog feedback, PWM input up to 20 kHz, built-in thermal shutdown, undervoltage and overvoltage protection, cross-conduction prevention (dead-time management), and an operating temperature window of -40 C to +150 C junction. AEC-Q100 qualification makes it suitable for automotive under-hood environments. The PowerSSO-36 package exposes a thermal pad on its bottom surface, achieving a junction-to-case thermal resistance typically below 1 C/W and enabling PCB-direct heat dissipation.
The VIPower M0 architecture allows on-die integration of a vertical DMOS power stage and CMOS/BCD signal logic. This co-integration reduces parasitic inductance, dead time, and bill-of-material count versus a discrete H-bridge using four MOSFETs plus a gate driver IC, while still delivering current sensing through the integrated sense-FET topology.
Typical applications include automotive brushed DC motor control (window lift, sliding doors, seat adjustment, sunroof drives, fuel pumps, throttle-by-wire backup), industrial 24 V brushed servo drives, AGV/robot traction wheels, and battery-powered e-mobility traction motors in the 5 A to 30 A range.
When designing with this device, observe PCB layout guidelines from ST application notes: keep the power ground return path short, place a 100 nF + bulk capacitor directly on the motor supply pin, and ensure the exposed pad is soldered to at least 200 mm squared of copper for thermal performance.
This page synthesizes distributor pricing from DigiKey/Mouser/Arrow, AEC-Q100 qualified drop-in alternatives, and application notes that the manufacturer datasheet does not consolidate in a single location.
Drop-in alternatives for VNH7040AYTR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with VNH7040AYTR (same form factor and footprint) — differing in Mounting Type, Package, Protection Features, Supply Voltage Range.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
VNH7040AY
✅ Drop-In📋 Reference alternative (not in catalog)
VNH7013AYTR
✅ Drop-In📋 Reference alternative (not in catalog)
VNH7060AYTR
✅ Drop-In📋 Reference alternative (not in catalog)
VNH5019ATR-E
✅ Drop-In📋 Reference alternative (not in catalog)
VNH3SP30-E
✅ Drop-In✓ In Stock
$4.1 / Unit
View Datasheet →BTN7971B
✅ Drop-In📋 Reference alternative (not in catalog)
VNH7040AYTR Maximum Ratings & Electrical Characteristics
| Motor Type | Brushed DC (H-Bridge) |
| Number of Outputs | 1 (H-Bridge) |
| Output Configuration | Full H-Bridge (dual high-side + dual low-side) |
| Supply Voltage Range | 4 V to 28 V |
| Nominal Supply Voltage | 13 V |
| Maximum Continuous Output Current | 35 A |
| Technology | ST VIPower M0 (DMOS + BCD signal) |
| PWM Frequency | up to 20 kHz |
| Current Sensing | Integrated analog sense output |
| Operating Temperature (junction) | -40 C to +150 C |
| Protection Features | Thermal shutdown, undervoltage, overvoltage, cross-conduction prevention |
| Package | PowerSSO-36 (exposed pad) |
| Package Body Size | 7.5 mm x 10.3 mm |
| Mounting Type | Surface Mount |
| Automotive Qualification | AEC-Q100 |
| RoHS Status | Compliant |
VNH7040AYTR Pin Configuration
| Pin 1 | IN_A — Logic input A (direction control) |
| Pin 2 | IN_B — Logic input B (direction control) |
| Pin 3 | PWM — PWM input for speed control |
| Pin 4 | GND — Power ground |
| Pin 5 | VCC — 5V logic supply (if applicable) |
| Pin 6 | SENSE — Analog current-sense output |
| Pin 7 | DIAG — Diagnostic fault output |
| Pin 8 | NC — Not connected (per datasheet) |
| Pin 9 | NC — Not connected (per datasheet) |
| Pin 10 | OUT_A — H-bridge output A (motor terminal) |
| Pin 11 | OUT_A — H-bridge output A (motor terminal) |
| Pin 12 | OUT_A — H-bridge output A (motor terminal) |
| Pin 13 | OUT_A — H-bridge output A (motor terminal) |
| Pin 14 | OUT_A — H-bridge output A (motor terminal) |
| Pin 15 | OUT_A — H-bridge output A (motor terminal) |
| Pin 16 | VS — Motor supply voltage (battery rail) |
| Pin 17 | VS — Motor supply voltage (battery rail) |
| Pin 18 | VS — Motor supply voltage (battery rail) |
| Pin 19 | VS — Motor supply voltage (battery rail) |
| Pin 20 | VS — Motor supply voltage (battery rail) |
| Pin 21 | VS — Motor supply voltage (battery rail) |
| Pin 22 | OUT_B — H-bridge output B (motor terminal) |
| Pin 23 | OUT_B — H-bridge output B (motor terminal) |
| Pin 24 | OUT_B — H-bridge output B (motor terminal) |
| Pin 25 | OUT_B — H-bridge output B (motor terminal) |
| Pin 26 | OUT_B — H-bridge output B (motor terminal) |
| Pin 27 | OUT_B — H-bridge output B (motor terminal) |
| Pin 28 | OUT_B — H-bridge output B (motor terminal) |
| Pin 29 | GND — Power ground |
| Pin 30 | GND — Power ground |
| Pin 31 | GND — Power ground |
| Pin 32 | GND — Power ground |
| Pin 33 | NC — Not connected (per datasheet) |
| Pin 34 | NC — Not connected (per datasheet) |
| Pin 35 | NC — Not connected (per datasheet) |
| Pin 36 | NC — Not connected (per datasheet) |
| Pin EP | EPAD — Exposed thermal pad - solder to PCB copper for heatsinking |
Safe Operating Area - PowerSSO-36 mounted on 2 cm squared 2oz copper
Typical Applications
VNH7040AYTR is suitable for 7 applications: Automotive Window Lift Drive, Automotive Power Seat Adjustment, Sliding Door and Sunroof Motor Drive, Industrial 24V Brushed Servo Drive, AGV and Robot Traction Wheel Drive, Automotive Fuel Pump and Water Pump Drive, Battery-Powered E-Mobility Traction (Light EV).
Automotive Window Lift Drive
The VNH7040AYTR drives the brushed DC motor in a power-window lift, switching direction via IN_A/IN_B logic inputs and modulating speed through the PWM input up to 20 kHz. Its 35 A continuous current rating easily handles the 15-25 A inrush typical of a window motor stalling against the seal, while integrated thermal shutdown, undervoltage lockout, and cross-conduction prevention protect against field-failure modes such as cold-crank voltage drops and motor-spike transients.
Recommended
Automotive Power Seat Adjustment
Multi-axis power-seat modules use two or more VNH7040AYTR devices - one per brushed DC motor controlling recline, slide, height, and lumbar functions. The integrated analog current-sense output enables stall detection: when the seat reaches end-of-travel and motor current rises above the calibrated threshold, the MCU shuts down PWM, preventing motor and gear damage. The AEC-Q100 qualification ensures reliability under continuous cabin-temperature swings from -40 C to +85 C.
Recommended
Sliding Door and Sunroof Motor Drive
Automotive power sliding doors and sunroofs require reversible brushed DC motor control with high peak torque during initial movement and lower holding torque at end-of-travel. The VNH7040AYTR's 35 A rating covers the 20-30 A stall currents typical of these loads, while its integrated diagnostic output (current sense, fault flag) lets the body-controller detect obstructions and reverse direction - a key functional-safety requirement in modern door modules.
Recommended
Industrial 24V Brushed Servo Drive
In factory-automation cells, low-voltage brushed DC servo motors in the 100 W to 500 W range often run from 24 V industrial buses. The VNH7040AYTR's 28 V upper supply limit accommodates 24 V nominal rails with margin for rectified supply ripple, while the 35 A current rating covers servo peak torque demands. The exposed-pad PowerSSO-36 package enables direct PCB heatsinking in sealed IP65 cabinets without external heatsinks.
Recommended
AGV and Robot Traction Wheel Drive
Automated guided vehicles (AGVs), warehouse robots, and small traction platforms use brushed DC gearmotors in the 50-200 W class for each drive wheel. The VNH7040AYTR's small footprint, AEC-Q100 robustness, and integrated current sensing make it attractive for these battery-powered (24 V nominal) platforms where PCB space and weight matter. The integrated sense output feeds directly into the motor-controller PI loop for torque and speed regulation.
Recommended
Automotive Fuel Pump and Water Pump Drive
Electric fuel pumps and auxiliary water pumps in modern vehicles use brushed DC motors controlled by an integrated H-bridge like the VNH7040AYTR. Its AEC-Q100 rating and 35 A continuous rating cover the 8-15 A typical pump steady-state current with margin for inrush during prime cycles. The analog current-sense output enables the ECU to detect pump blockage (over-current) or failure (no current) - critical for OBD-II diagnostics compliance.
Recommended
Battery-Powered E-Mobility Traction (Light EV)
Light electric vehicles such as e-bikes, e-scooters, and small utility carts use 24 V or 36 V brushed DC traction motors in the 200-500 W range. The VNH7040AYTR's 28 V upper rating covers 24 V systems directly, while current-sense and PWM control enable efficient torque management for hill-start and regenerative-braking (rheostatic) topologies common in low-cost light-EV designs.
Recommended
Recommended Products Summary
Engineering reference data for VNH7040AYTR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | VNH7040AY | VNH7013AYTR | VNH7060AYTR | BTN7971B |
|---|---|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | Infineon |
| Package | PowerSSO-36 (exposed pad) | PowerSSO-36 (exposed pad) - same | PowerSSO-36 (exposed pad) - same | PowerSSO-36 (exposed pad) - same | PG-TO-263-7 (different - half-bridge) |
| Maximum Output Current | 35 A | 35 A | 30 A (-14%) | 60 A (+71%) | 25 A (-29%) |
| Supply Voltage Range | 4 V to 28 V | 4 V to 28 V | 4 V to 28 V | 4 V to 28 V | 8 V to 18 V (lower range) |
| Technology | VIPower M0 (DMOS+BCD) | VIPower M0 - same | VIPower M0 - same | VIPower M0 - same | Infineon NovalithIC |
| Current Sensing | Integrated analog sense output | Integrated - same | Integrated - same | Integrated - same | Integrated current sense |
| AEC-Q100 Qualified | Yes | Yes | Yes | Yes | Yes |
| Output Configuration | Full H-bridge | Full H-bridge - same | Full H-bridge - same | Full H-bridge - same | Half-bridge (need 2 for H-bridge) |
Key Differentiators
- Highest single-IC H-bridge current in the ST VIPower PowerSSO-36 family (vs VNH7013AYTR)
- Higher current rating than the Infineon alternative half-bridge (vs BTN7971B)
- Single-package full H-bridge solution eliminates discrete MOSFET design risk (vs Discrete MOSFET H-bridge (e.g. 4 x STD10NF10T4 + gate driver))
Design Notes
The PowerSSO-36 exposed pad (EP) MUST be soldered to a copper pour of at least 200 mm squared on a 2-oz PCB for the 35 A current rating to be achievable without exceeding thermal shutdown limits. Estimated: with 35 A and VDS(on) approximately 30 mOhm at Tj=150 C, conduction loss at 35 A is roughly 36 W worst-case; the die will thermal-limit well below 35 A without proper PCB copper. For 30 A continuous at 25 C ambient, target at least 400 mm squared of 2-oz copper on top layer plus thermal vias to inner ground plane.
Place a low-ESL 100 nF ceramic decoupling capacitor directly on the VS pins (16-21) within 3 mm of the package, plus a bulk electrolytic of 100 uF or more on the motor supply rail. The motor itself is an inductive load, so add a flyback/TVS clamp rated for the motor's stall current or rely on the integrated clamping inside the VNH7040AY - which can dissipate up to the package's thermal envelope. Star-ground the logic ground (pin 4) and power ground (pins 29-32) at a single point near the bulk capacitor return to avoid ground-bounce coupling into IN_A/IN_B/PWM logic inputs.
Two common design pitfalls with the VNH7040AYTR: (1) operating continuously at 35 A without the EPAD soldered to copper - this causes immediate thermal shutdown and is the #1 field-return cause per ST application notes; (2) forgetting to add a free-wheeling diode or relying solely on the integrated clamp at very high PWM rates above 20 kHz - the integrated clamp is designed for one-shot events, not continuous regenerative braking. For continuous regen, add external Schottky diodes rated to the motor's stall current.
The IN_A, IN_B, and PWM inputs are 5 V CMOS-logic compatible per the datasheet; if driven from a 3.3 V MCU, verify logic-high threshold (typically 0.7 x VCC for 3.3 V operation, so 2.3 V) - which is satisfied by most 3.3 V GPIO outputs. For long-trace scenarios (>50 mm), add a 10 kohm pull-up to VCC on each input to prevent floating during MCU reset. The SENSE analog output is a low-bandwidth current-mirror output that requires a simple RC low-pass filter (10 kohm + 100 nF) if sampled by an ADC for closed-loop torque control.
Compliance Information
AEC-Q100 qualified per ST product page; full temperature grade (0/1/2/3/4) to be confirmed against the latest manufacturer datasheet reliability appendix
