The TB6568KQ is a full – bridge DC motor driver IC made by Toshiba18. It is designed to control the speed and direction of brushed DC motors. Here is a detailed function description:
- Power Supply and Current Capability18: It has a wide power supply voltage range of 10V to 45V, with a maximum rating of 50V. The maximum output current is 3A, and the typical output ON – resistance is 0.55Ω. This allows it to drive DC motors with different power requirements.
- Control Modes18: The TB6568KQ offers four operating modes selectable via IN1 and IN2: clockwise (CW), counterclockwise (CCW), Short Brake, and Stop. This provides flexible control over the motor’s rotation direction and braking.
- PWM Control18: It employs PWM (Pulse – Width Modulation) control, which enables high – efficiency speed regulation of the DC motor by adjusting the duty cycle of the PWM signal. This helps in achieving precise speed control and reducing power losses.
- Protection Circuits18: The chip is equipped with multiple protection circuits, including overcurrent shutdown circuit (ISD), overvoltage shutdown circuit (VSD), thermal shutdown circuit (TSD), and undervoltage lockout circuit (UVLO). These protection features safeguard the chip and the connected motor from damage due to abnormal operating conditions such as overcurrent, overvoltage, overheating, and undervoltage.
- Dead Time Control18: There is a dead – time for preventing shoot – through current. This feature ensures that both high – side and low – side MOSFETs in the full – bridge configuration do not conduct simultaneously, which could otherwise cause a short – circuit and damage the chip.
- Output Configuration18: It has two output pins, OUT1 and OUT2, which are connected to the two terminals of the DC motor. The full – bridge structure allows bidirectional current flow through the motor, enabling it to rotate in both clockwise and counterclockwise directions.
