一种线性可调的死区产生电路
摘要
提出了一种新型的可调死区时间产生电路。该死区产生电路是通过改变电压斜坡的斜率来调整死区时间,并且对死区时间与控制电压的非线性进行补偿,提高了死区时间线性度和精度。该电路结构简洁、可调范围广、精度高,适用于各种半桥驱动电路中。采用华虹0.5μm的BCD工艺仿真验证了该电路,结果表明,当外接电阻阻值为20 K~140 K范围内,可以实现死区时间的线性高精度可调,可调死区时间范围为50 ns~250 ns。
引文
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[2]Vahid Yousefzadeh,Dragan Maksimovic.Sensorless optimization of dead times in DCDC convertors With synchronous rectifiers,IEEE Trans Power Electron.,vol.21,no.4,pp.994-1002,Jul.2006.
[3]刘飞云.有源钳位正激变换器的研究[D].武汉:华中科技大学,2004.
[4]CHRISTOPHE P.BASSO,SWITCH-MODE POWER SUPPLIES[M].MCGRAWHILL PRESS,2008.
[5]Seong Wha Hong,Hong-Jin Kim and Kang-Yoon Lee,et al.A Novel Dead-time Generation Method of Clock generator for Resonant Power Transfer System[C]//SOC Design Conference(ISOCC),2010 International,South Korea.2010:51-54.