IN8510 and power motor driver circuit composed of DAC7520

The BTS412B functions as two high-side power MOSFET switches, while the BU271L components rated for 50V serve as the low-side switches. Together, these elements can form a bi-directional H-bridge DC motor drive circuit, as depicted in Figure 11-1l. This circuit is designed for electrical automatic doors and can handle continuous currents of up to 6A. The four-leg switches are directly controlled by CMOS logic levels. The state output of two BTS412B devices provides logical drive signals or can be interfaced with a transistor, and an LED is used to indicate fault status. The midpoint resistance of the left leg to ground is 12kΩ when all four H-bridge switches are turned off, preventing the BTS412B from mistakenly identifying an open load. In the event of an open load condition, the right BTS412B can detect this fault and generate a fault signal.

The described circuit utilizes the BTS412B and BU271L components to create a robust and efficient H-bridge configuration suitable for driving DC motors in automatic door systems. The H-bridge topology allows for bidirectional control of the motor, enabling it to open and close the doors as required. The high-side switches, represented by the BTS412B, are responsible for connecting the motor to the positive supply voltage, while the low-side switches, represented by the BU271L, connect the motor to ground.

The integration of CMOS logic levels for controlling the four switches ensures compatibility with modern digital control systems, allowing for precise and efficient operation. The logical drive outputs from the BTS412B can be used to control additional components or provide feedback to a microcontroller, enhancing the system's functionality. The inclusion of an LED for fault indication is a critical feature, providing immediate visual feedback regarding the operational status of the circuit.

The 12kΩ resistance at the left leg midpoint when the switches are off acts as a safeguard against false open load detection by the BTS412B. This design consideration is essential for maintaining the reliability of the system, as it prevents unnecessary fault signals from being triggered during normal operation. The ability of the right BTS412B to detect actual open load conditions further enhances the circuit's fault tolerance, ensuring that any issues can be promptly identified and addressed.

Overall, this H-bridge motor drive circuit is well-suited for applications requiring reliable and efficient control of DC motors, particularly in automatic door mechanisms where safety and performance are paramount.BTS412B as two high-side power MOSFET switch and two BU271L 50v for the low-side switch, can be composed of bi-directional H-bridge DC motor drive circuit shown in Figure 11-1l. The circuit is an electrical automatic doors design, continuous current up to 6A. Four-leg switches are directly controlled by CMOS logic levels. Two BTS412B state output of the logical drive or a transistor, the LED displays the fault status. Left leg midpoint -to-ground resistance when 12ktl four H-bridge switches are turned off, will not be BTS412B mistaken Open load. Once open load occurs, the right of BTS412B can detect it and issue a fault signal.