STMicroelectronics VNH7040AYTR

Overview

VNH7040AYTR from STMicroelectronics is an AEC-Q100 qualified automotive H-bridge motor driver IC integrating dual high-side VIPower® M0 drivers and two low-side MOSFETs in a single PowerSSO-36 package. It delivers 35 A continuous output current, supports PWM up to 20 kHz, and provides real-time analog current feedback via Multisense. Used for bidirectional DC motor control in power seats, HVAC actuators, and electronic throttle bodies.

For engineers reviewing the VNH7040AYTR datasheet, VNH7040AYTR pinout, VNH7040AYTR application, or VNH7040AYTR equivalent, key selection criteria include its 40 mΩ typical R_DS(on) per leg, integrated short-to-VCC/ground protection, thermal shutdown with junction temperature monitoring, and configurable Multisense diagnostics for motor current, chip temperature, and battery voltage.

Technical Context

The VNH7040AYTR implements a full-bridge topology using three monolithic dice: two high-side drivers and one dual low-side switch die, all fabricated in ST's VIPower® M0 process. Each high-side leg features independent current/power limitation and overtemperature shutdown, while both low-side switches support independent overcurrent detection and latch-off behavior.

Its Multisense architecture uses SEL0/SEL1 address lines to multiplex four analog signals-motor current (proportional current output), V_CC voltage (ratiometric voltage), chip temperature (voltage), and fault flag-onto a single open-drain current/voltage output pin. The MultiSense_EN pin enables or disables this entire diagnostic subsystem.

Key Specifications

Pinout & Package

Package: PowerSSO-36 TP - thermally optimized surface-mount package with three exposed copper islands (V_CC, GNDA, GNDB) for direct PCB thermal coupling and enhanced power dissipation in automotive under-hood applications.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar H-bridge motor driver applications.

Compared with TLE9201SG and BTS7200-2EPA, the VNH7040AYTR uniquely combines full-bridge integration, 35 A capability, and analog Multisense diagnostics in one AEC-Q100 package - reducing system-level component count and enabling advanced motor health monitoring without sacrificing automotive reliability.

Availability

VNH7040AYTR is available at Aetrix Electronics and suitable for automotive body electronics, powertrain auxiliary actuators, and chassis control systems requiring stable component supply across extended product lifecycles.

Supply support for VNH7040AYTR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in automotive-grade power ICs, microcontrollers, and sensors with vertical manufacturing capabilities.

The VNH7040AYTR belongs to ST's VIPower® family of intelligent power devices, designed specifically for demanding automotive motion control applications where integration, protection, and diagnostic fidelity are critical.

FAQ

What is the maximum allowable junction temperature for continuous operation?

The VNH7040AYTR is rated for continuous operation up to 150 °C junction temperature, validated per AEC-Q100 Grade 0. Thermal derating begins above 125 °C ambient depending on PCB copper area and airflow; Figure 23 in the datasheet provides R_thj-amb curves for 100 mm² to 1000 mm² heatsink areas.

How does the Multisense function handle simultaneous fault conditions?

Multisense prioritizes fault reporting: if multiple faults occur (e.g., short-to-ground and thermal shutdown), the pin asserts the fault flag corresponding to the first detected condition and holds it until cleared by toggling the relevant input (e.g., INA/INB). SEL0/SEL1 must be set to '00' to read the fault flag mode.

Can the VNH7040AYTR drive inductive loads without external freewheeling diodes?

Yes - each high-side switch integrates a fast-recovery freewheeling diode with 0.7–0.9 V forward voltage at 150 °C. These diodes handle flyback energy during PWM turn-off, eliminating need for external diodes in most automotive motor applications with proper PCB layout and thermal design.

Is standalone half-bridge operation supported without modifying the PCB layout?

Yes - the device supports half-bridge mode by asserting only INA or INB while holding the other low; the unused leg remains inactive. No PCB changes are needed, and Multisense continues monitoring the active leg's current and temperature via SEL0/SEL1 configuration.