As the driving voltage of MOS tube IRF640 is 15V, the 15V square wave signal is first connected at J1, and the voltage regulator 1N4746 is connected through the resistance R4 to make the trigger voltage stable, but also make the trigger voltage not too high and burn the MOS tube. Then it is connected to the MOS tube IRF640(in fact, this is a switching tube, which controls the turn-on and turn-off of the back end), and the MOS tube can control the turn-on and turn-off time of the MOS tube by controlling the duty cycle of the drive signal.
When the MOS tube is turned on, its D pole is grounded, it is disconnected when it is turned off, and it is equivalent to 24V after the stage circuit. The transformer is through the voltage change to make the right end output 12V signal.
The right end of the transformer is connected to a rectifier bridge, and the 12V signal is output from the connector X1.
mosfet driver chip is a chip integrated with CMOS control circuit and DMOS power device, which can be used to form a complete motion control system with the main processor, motor and incremental encoder. It can be used to drive inductive loads such as DC motors, stepper motors and relays.
The driver chip adopts standard TTL logic level signal control, with two enable control terminals, which allow or prohibit the device to work without being affected by the input signal, and a logic power input terminal, which makes the internal logic circuit part work under low voltage; Can be connected to the external detection resistance, the change of the feedback to the control circuit.