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.
|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|
This product is intended for users looking for a full H-bridge driver in a small form factor (15mm x 20mm) that drives DC motors up to 12A with excellent thermal dissipation.
With an encoder and your controller, this becomes a complete servo motor solution on a board, ideal for prototyping with DC motors to build a feedback system that is much smoother motor movement with a more predictable pathway.
|Dimensions||5 × 3 × 3 in|
|Pin Number||Pin Label||Function||Designation||Notes|
|2, 5, 7, 9, 15||GND||Ground||Ground||Common Ground for both motor voltage and logic voltage (all GND pins are connected)|
|3, 16||VCC||Motor Power Connection||Power||Power input (4V to 28V)|
|1||PWM *||Logic Voltage Input||Input||PWM input that controls the speed|
|13-14 , 11-12||OUT_A, OUT_B||Motor Power Output||Output||Connection to the DC Motor(s)|
|4, 8||IN_A, IN_B *||Logic Voltage Input||Input||Control Inputs from microcontroller (2.7V to 5.5V). Two inputs that determines the direction.|
|6||SEL_0 *||Logic Voltage Input||Input||One of the two inputs that determines the direction.|
|10||CS_OUT *||Voltage Output||Output||Voltage output, dependent on SEL_0, IN_A, IN_B input conditions. See table below.|
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