Patent ID: 8564265

Claim:
A driving circuit, comprising: a switching circuit comprising a driving chip and a switching unit, the switching unit connected between a power source and a load, the driving chip configured for controlling connection and disconnection of the switching unit; an acquiring circuit connected between the switching unit and the load, and configured for providing a feedback to an amplifying circuit; the amplifying circuit comprising two amplifying input terminals respectively connected to two terminals of the acquiring circuit, and an amplifying output terminal outputting an amplified voltage according to the feedback; and an adjusting circuit connected to the amplifying output terminal and configured for outputting different control voltages to the driving chip according to the amplified voltage, the driving chip outputting different driving voltages to switch on the switching unit according to the different control voltages; wherein the adjusting circuit comprises a voltage adjusting module, an eleventh resistor, a twelfth resistor, a thirteenth resistor, and a BJT; the voltage adjusting module comprises a voltage input terminal connected to the power source, a voltage output terminal connected to the driving chip, and a feedback terminal; the eleventh resistor is connected between the voltage output terminal and the feedback terminal; one terminal of the twelfth resistor is connected to the feedback terminal, and another terminal is grounded; the BJT comprises a collector connected between the eleventh resistor and the twelfth resistor via the thirteenth resistor, an emitter being grounded, and a base connected to the amplifying output terminal.