VNH3SP30TR

Updated: 2026-07-20

Overview

The VNH3SP30TR is a monolithic H-bridge motor driver IC developed by STMicroelectronics, designed to handle high-current applications in automotive and industrial environments. It integrates two high-side and two low-side switches, enabling bidirectional control of DC motors and other inductive loads. The device operates within a voltage range of 5.5V to 36V and can deliver continuous output currents up to 30A, making it suitable for demanding applications such as power seats, window lifters, and industrial actuators. With its compact PowerSSO-16 package, the VNH3SP30TR offers space-saving advantages while maintaining robust performance. The IC incorporates advanced protection mechanisms, including thermal shutdown, overcurrent detection, and undervoltage lockout, ensuring reliable operation under varying conditions. Its PWM input compatibility allows for precise speed control, while the diagnostic output provides real-time fault monitoring.

Structure and Working Principle

The VNH3SP30TR consists of a full H-bridge configuration with four MOSFET switches—two high-side and two low-side—enabling bidirectional current flow through the load. The high-side drivers include charge pumps to maintain proper gate drive voltage, ensuring efficient switching even at low supply voltages. The device's control logic interfaces with microcontrollers or other digital systems through standard PWM and direction inputs. When a PWM signal is applied, the internal circuitry modulates the MOSFET switches to regulate motor speed and direction. The current sensing feature provides feedback for overcurrent protection, while the thermal management system monitors junction temperature to prevent overheating. The monolithic design minimizes external component count, simplifying system integration and reducing board space requirements.

Key Features

The VNH3SP30TR stands out for its high-current capability, supporting up to 30A continuous current and 40A peak current for short durations. This makes it suitable for heavy-duty applications where reliable motor control is critical. The device operates across a wide voltage range (5.5V to 36V), accommodating various power supply configurations commonly found in automotive and industrial systems. Advanced protection features include thermal shutdown with automatic restart, overcurrent detection with latch-off, and undervoltage lockout to prevent malfunction during low-voltage conditions. The integrated current sensing provides accurate load monitoring without requiring external shunt resistors. The PWM frequency can reach up to 20kHz, enabling silent operation and precise speed control in noise-sensitive environments.

Application Areas

Automotive systems represent a primary application area for the VNH3SP30TR, where it powers electric windows, sunroofs, seat adjusters, and mirror positioning mechanisms. Its robust design meets the stringent requirements of automotive environments, including temperature extremes and electrical noise. In industrial automation, the driver IC finds use in conveyor belts, robotic arms, and actuator controls where reliable high-current switching is essential. The device also serves applications in medical equipment, such as adjustable hospital beds and dental chairs, benefiting from its smooth PWM control and safety features. Additionally, it powers various consumer products requiring motor control, including electric gates, garage doors, and home automation systems. The IC's versatility and protection mechanisms make it a preferred choice across multiple industries.

Maintenance and Precautions

Proper heat management is crucial for maintaining the VNH3SP30TR's performance and longevity. The PowerSSO-16 package features an exposed thermal pad that must be soldered to a sufficiently large copper area on the PCB for effective heat dissipation. Designers should calculate thermal requirements based on expected current loads and ambient temperatures, potentially adding heat sinks for high-current applications. Electrical precautions include ensuring the supply voltage remains within specified limits (5.5V to 36V) and implementing reverse polarity protection if necessary. The device should be protected from electrostatic discharge (ESD) during handling and installation. It's recommended to include flyback diodes for inductive loads not already protected by the IC's internal circuitry, and to follow proper PCB layout guidelines to minimize electromagnetic interference (EMI).

B2B Procurement Guide

When procuring the VNH3SP30TR in bulk for B2B applications, verify the supplier's authorization status with STMicroelectronics to ensure genuine components. Consider purchasing through franchised distributors to guarantee quality and availability. Lead times may vary based on market demand, so plan procurement schedules accordingly, especially for automotive production lines with just-in-time requirements. Evaluate pricing based on quantity breaks, with typical unit prices ranging from approximately $3.50 to $5.00 for medium-volume orders (for reference only). Request samples for prototyping and testing before committing to large purchases. Check for alternative packaging options (tape and reel, tubes) that may better suit automated assembly processes. For automotive applications, confirm that the supplier can provide the necessary documentation and quality certifications required by industry standards.