关键词: 功耗, 电源芯片, 驱动电路

Abstract: A gate driver circuit with wide input voltage is presented, which is used in the BUCK type DC-DC chip to driver power switch and synchronous rectifier. High voltage N well isolation technology is used in this circuit to achieve wide input voltage, and adaptive dead time control technology is used in this circuit to achieve power switch and synchronous rectifier action in different time thus to reduce the power. This design is based on UMC 0.25 μm 5-100 V 2P5M BCD technology to complete the schematic. The simulation results show that the input voltage range is 5-100 V；the delay from signal HO falling edge to signal LO rising edge is 75 ns, the delay from signal LO falling edge to signal HO rising edge is 71 ns; the maximum source current and sink current of the high side are 2.17 A and 2.33 A; the maximum source current and sink current of the low side are 2.83 A and 3.21 A.

Key words: power, voltagechip, drivercircuit