Automotive Dual H Bridge DC Motor Driver

Part number 120052

This dual motor driver is based off of the ST Microelectronics VNH2SP30-E integrated H-bridge motor driver chip.

The VNH2SP30TR-E chip from ST Microelectronics is designed for the automotive industry and greatly used in 12

volt window motor control and motorized seat adjustment. 30 Amps max at 16 Volts. This board give you access

to all the capabilities the chip offers.

The quick overview:

5V logic level compatible inputs

Undervoltage and overvoltage shut-down (5.5V-16V)

Overvoltage clamp

Thermal shut down

Cross-conduction protection

Linear current limiter

Very low stand-by power consumption

PWM operation up to 20 kHz

Protection against loss of ground and loss of VCC

Current sense output proportional to motor current

Reverse polarity hookup protection

Optional chip heatsink

Brake to ground or brake to VCC

Motor power supply is all that is required (<16 VDC). Board includes a 5 volt regulator and can provide up

to 1A of 5 VDC power for attaching TTL peripherals.

Description (from STMicroelectronic's datasheet)

The VNH2SP30-E is a full bridge motor driver intended for a wide range of applications. The device incorporates a

dual monolithic high side driver and two low side switches. The high side driver switch is designed using

STMicroelectronic’s well known and proven proprietary VIPower™ M0 technology which permits efficient integration

on the same die of a true Power MOSFET with an intelligent signal/protection circuitry. The low side switches are

vertical MOSFETs manufactured using STMicroelectronic’s proprietary EHD (‘STripFET™’) process. This package,

specifically designed for the harsh automotive environment offers improved thermal performance thanks to exposed

die pads. The input signals INA and INB can directly interface to the microcontroller to select the motor direction and

the brake condition. The DIAGA/ENA or DIAGB/ENB, when connected to an external pull-up resistor, enable one leg of

the bridge. They also provide a feedback digital diagnostic signal. The motor current can be monitored with the CS pin

by delivering a current proportional to its value. The speed of the motor can be controlled in all possible conditions by

the PWM up to 20 kHz. In all cases, a low level state on the PWM pin will turn off both the LSA and LSB switches.

When PWM rises to a high level, LSA or LSB turn on again depending on the input pin state.

Compare to SparkFun's "Monster Moto Shield" and Polulu’s “Dual VNH5019 motor driver”

The PCB measures 3.3”W by 2.5”L . The onboard 7805 chip allows for 5V power utilization for peripheral support.

The 5 volt regulator can be disabled by removing the jumper from JP1. This driver board gives you access to all the

features that the chip has to offer. The green power LED indicates that there is 5V power and motor power

available. The red and green LEDs indicate that motor voltage is being pulsed out of the motor pins (motor should

be moving when red or green LEDs are lit). The power LED is also green so don’t be confused.

The Automotive Dual H Bridge DC Motor Driver consists of the following key components:

Automotive fully integrated H-bridge motor driver (PN# VNH2SP30TR-E, ST Microelectronics)

o http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/DATASHEET

/CD00043711.pdf

MOSFT 30V 56A (PN# IRFR3707ZTRLPBF, International Rectifier)

o http://www.irf.com/product-info/datasheets/data/irfr3707.pdf

Zener Diode (PN# BZT52H-C18,115 NXP Semiconductor)

o http://www.nxp.com/documents/data_sheet/BZT52H_SER.pdf

DC/DC Switching Controllers 5V, 1A (PN# SP7805V2-L/TR) Exar

o http://www.exar.com/

Schematics and EagleCAD files are available for download at www.Atlanta-Robotics.com. Sample code

for programming on an Arduino microcontroller can also be downloaded at www.Atlanta-Robotics.com.

A video containing further demonstration on how this board works and behaves can be found at

www.Atlanta-Robotics.com and on our YouTube channel

Figure 1

Figure 2

Figure 3: EagleCAD Schematic

Figure 4: PCB layout (not to scale)