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This driver uses chips BTS7960 composed of high-power drive full H-bridge driver module with thermal over-current protection. Double BTS7960 H-bridge driver circuit, with a strong drive and braking, effectively isolating the microcontroller and motor driver! High-current 43A. Double BTS7960 large current (43 A) H bridge driver. 5V isolate with MCU, and effectively protect MCU. Just need four lines from MCU to driver module (GND. 5V. PWM1. PWM2).