大电流高速场效应管驱动器

Large Current and High Speed MOSFET Driver

传统驱动器由级联式的反相器组成,很难兼备速度快、驱动能力强及可靠性高的特点。为了提升驱动器的综合性能,设计了一款高速场效应管驱动器。通过仿真,在18 V工作电压下,可在60 ns内完成10000 pF电容充电,峰值电流达到4 A以上。通过对0.5μm高压BCD工艺流片后的电路测试,结果证明利用该设计,高速场效应管驱动器电路实现了预期的充放电速度,且性能可靠稳定。

Traditional driver is made of series inverters which is difficult to be both transmitting fast and driving strongly.We design a high speed MOSFET driver for improving the synthetical performance.Simulation result shows that it can work in 18 V voltage and can charge the 10000 pF capacitor in 60 ns.The peak current can reach 4 A at least.Through the circuit test after taping out on the process line of 0.5μm BCD,the result of which shows the high speed MOSFET driver has achieved the expected changing speed and stable performance.