VNH5019 Motor Driver Carrier
 

This carrier board for ST’s VNH5019 motor driver IC operates from 5.5 to 24 V and can deliver a continuous
12 A (30 A peak). It works with 2.5 to 5 V logic levels, supports ultrasonic (up to 20 kHz) PWM, and features current sense feedback
(an analog voltage proportional to the motor current). Along with built-in protection
against reverse-voltage, over-voltage, under-voltage,
over-temperature, and over-current, these features make this product a great general-purpose motor driver.
 

This module is a compact breakout board for ST’s high-power VNH5019 motor driver IC,
a fully integrated H-bridge that can be used for bidirectional speed control of a single brushed DC motor.
The basic operation of the driver is summarized below,
but we also recommend careful reading of the VNH5019 datasheet (629k pdf) before using this product.
The board incorporates most of the components of the typical application diagram
on page 14 of the VNH5019 datasheet, including pull-up and current-limiting resistors and
a FET for reverse battery protection. It ships fully populated with its SMD components, including the VNH5019, as shown in the product picture.
 

מאפיינים

• Operating voltage: 5.5 – 24 V¹
• Output current: 12 A continuous (30 maximum)
• 3V-compatible inputs
• PWM operation up to 20 kHz, which is ultrasonic and allows for quieter motor operation
• Current sense output proportional to motor current (approx. 140 mV/A)
• Motor indicator LEDs (indicates what the outputs are doing even when no motor is connected)
• Robust:
  • Reverse-voltage protection
  • Can survive input voltages up to 41 V
  • Undervoltage and overvoltage shutdown
  • High-side and low-side thermal shutdown
  • Short-to-ground and short-to-Vcc protection

In this configuration, motor direction is determined by the states of the INA and INB pins and motor speed is
controlled by the duty cycle of a PWM signal supplied to the driver’s PWM pin.
The PWM pin is pulled low on the board, so the motor driver outputs are effectively disabled by default; the INA and INB pins are floating
(they are not pulled to any particular default voltage).
See the truth tables in the VNH5019A-E datasheet for more information on how the INA, INB, and
PWM pins affect the driver outputs, OUTA and OUTB.
Note that it is also possible to save a microcontroller I/O line by directly PWMing the
INA and INB pins while holding the PWM pin high (e.g. by connecting it directly to VDD).
 

מידות

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