BDR6121 smd IC Brushed Motor Driver IC SOP8 BDR6121H

Product Overview

The BDR6121H is a brushed DC motor driver IC. It is designed for motion control applications in products such as electronic locks, electric toothbrushes, toys, and other consumer goods that rely on low-voltage or battery power.

Core Specifications

• Manufacturer: Shenzhen Bardeen Microelectronics Co., Ltd.

• Package Type: SOP8 (150 MIL).

• Operating Voltage (VDD): 2.2V to 7.5V (suitable for 2–4 AA or AAA batteries).

• Output Current: Supports a DC peak current of 3A and a continuous current of 1.55A.

Features

• Protection Functions: Includes built-in thermal protection with hysteresis (OTSD), overcurrent protection, and undervoltage protection.

• Efficiency: Features a low output conduction resistance of approximately 0.45 ohms.

• Control Interface: Uses a set of PWM (INA and INB) inputs for direction and speed control.

Application Logic

The motor direction and state are controlled via the INA and INB input pins as follows:

• Stop (Standby): INA=L, INB=L (Output is High-Z).

• Forward: INA=H, INB=L.

• Reverse: INA=L, INB=H.

• Brake: INA=H, INB=H.

Design Notes

• Capacitor C1 must be placed as close as possible to the BDR6121H (less than 1cm).

• Capacitor C2 must be soldered directly onto the motor.