Power H Mini v2

Full H-bridge driver for DC motors – 12 A peak current, two wire control, and PWM

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Excellent Performance & Thermal Dissipation in a Tiny Form Factor

Power H Mini is an open-source, high current, full H-bridge driver that provides a lot of flexibility for DC motor applications. It is designed for full bridge control with a single motor, for two motors to be controlled with two half bridges, or for three motors to be controlled with mechanically dependent configurations.

The streamlined design coupled with the extremely low internal resistance results in a low amount of heat dissipation on the driver translating into improved control when accelerating, or braking. In robotics, this improved energy recuperation means that motors have much steeper, more controlled acceleration curves and also brake faster and evenly without dissipation of heat on the controller.

With simple two wire control and pulse-width modulation (PWM), this plug-and-play driver ensures smoother movement of motors in each direction including complete active coupling for improved accuracy during precision movement.

The high efficiency and low heat dissipation makes this an ideal solution where space and heat are design constraints. The pinout and interface are nearly identical to A4988, DRV8825 and similar board drivers with a 15mm x 20mm board size, however this is a DC motor driver, so it competes in functionality with H-bridge motor drivers based on the L298 or BTS7960 transistor technology which is typically delivered in a module 2-3x the size (~35mm x ~60mm).

For many usage scenarios up to 5 A, a heat sink can be avoided or significantly reduced. With a peak current limit of 12 A, this board delivers a surprising level of motor control in a tiny package.

Features & Specifications

This board comes pre-assembled using the automotive grade STM VNH7100AS H-Bridge driver (datasheet), incorporating a dual monolithic high-side driver and two low-side switches. Both switches are designed to integrate efficiently on the same die for a true Power MOSFET with intelligent signal and protection circuitry.

Features

  • Automotive qualified driver
  • Power indicator LED
  • PWM control
  • Undervoltage lockout
  • Overvoltage clamp / protection
  • Thermal shutdown and standby mode
  • Very low standby power consumption
  • MultiSense diagnostic functions
  • Analog motor current feedback
  • Output short to VCC detection
  • Output protected against short to ground and short to VCC
  • Available as part for a custom controller design

Specifications

  • Output Motor Voltage Range: 4 to 28 V
  • Logic Level on IN Pins: up to 5.5 V
  • Peak Current: 12 A
  • Stand-By Current (max): 1 µA
  • PWM Operation: up to 20 kHz
  • Board Dimensions: 15 mm x 20 mm

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