Patent ID: 6807071
Filing Date: 2004-10-19
Classification: H02M,H03K

Abstract:
A transformer isolated gate driver electrically connected to a power switch for realizing the driving of said power switch, comprising:a PWM driver for producing a PWM signal; a transformer electrically connected to said PWM driver; an input capacitor electrically connected to a primary side of said transformer in series; an output capacitor electrically connected to a secondary side of said transformer in series; an output diode electrically connected to two output terminals of said transformer isolated gate driver in parallel; and a active switch electrically connected to said output capacitor in series and having an input electrode electrically connected to a first terminal of said secondary side of said transformer, a first electrode electrically connected to a second terminal of said secondary side of said transformer, and a second electrode electrically connected to one of said two output terminals; wherein said secondary side of said transformer, said output capacitor, said output diode, and said active switch are electrically connected in series, and when said PWM signal is disappeared, by discharging a plurality of charges across an equivalent input capacitor of said power switch through said secondary side of said transformer, said output capacitor, and a body diode of said active switch, a mis-triggering signal on said power switch will no more appear.