BA6208 Motor Driver Breakout Board
Overview
The Boardoza BA6208 is a compact, reversible DC motor driver module designed to simplify the control of low-power brushed motors in embedded applications. Based on the robust BA6208 monolithic IC, this board integrates both the logic control interface and the power output stage into a single, cohesive unit.
Engineered primarily for precision electromechanical systems such as cassette mechanisms, robotic actuators, and variable-speed appliances, it enables seamless bidirectional control (Forward/Reverse) and braking via standard TTL-level logic signals. Its low standby current architecture makes it particularly suitable for battery-operated devices where quiescent power consumption is a critical design constraint.
Core Technical Specifications
The module is defined by the following operational parameters:
Driver Architecture: Monolithic reversible motor driver with a built-in power output stage.
Operating Voltage Range: Supports a wide supply voltage from 4.5V to 15.0V, accommodating various standard power rails (5V, 9V, 12V).
Output Current Capacity: Delivers a typical continuous drive current of 100mA, with a peak capacity of 200mA.
Logic Interface: Direct TTL-compatible inputs, allowing for easy interfacing with microcontrollers (Arduino, ESP32, STM32) without external level shifting.
Standby Efficiency: Features an ultra-low standby current of approximately 0.4mA when the inputs are grounded (Ain=Low, Bin=Low).
Thermal Tolerance: Rated for reliable operation in environments ranging from -20°C to +60°C.
Mechanical Footprint: Compact 20 mm x 40 mm PCB dimensions.
Key Engineering Features
Integrated Protection and Braking
The BA6208 incorporates internal surge absorption diodes to clamp inductive kickback spikes generated by the motor windings, protecting the driver transistors from breakdown. Additionally, the driver features a hard-braking mode; when both logic inputs are pulled HIGH, the output terminals are shorted to the ground rail (Low/Low), effectively stalling the motor using back-EMF damping.
Simplified Logic Control
The driver uses a dual-input logic scheme (Ain, Bin) to determine the motor state, eliminating the need for complex H-bridge driver code.
Forward Drive: Ain=High, Bin=Low drives current from A-Out to B-Out.
Reverse Drive: Ain=Low, Bin=High reverses the polarity.
Forced Stop (Brake): Ain=High, Bin=High rapidly halts rotation.
Standby/Coast: Ain=Low, Bin=Low puts the outputs in a high-impedance (OPEN) state, allowing the motor to spin down freely.
Hardware Interface and Signal Mapping
The module provides separate headers for logic control and power output to ensure signal integrity:
Logic and Power Input
+5V: Logic supply voltage input.
A IN: Logic input A (Controls Output A state).
B IN: Logic input B (Controls Output B state).
GND: Common system ground.
Motor Output
A OUT: Motor Terminal A connection.
B OUT: Motor Terminal B connection.
Applications
Consumer Electronics: Drive mechanisms for cassette decks, CD players, and VCR loading trays.
Robotics: Control of small DC gear motors for micro-robot locomotion or gripper actuation.
Automotive Accessories: Actuators for mirror adjustments or door lock solenoids.
Prototyping: Rapid testing of motor control algorithms using standard 5V logic.
Last updated