Patent ID: RE40844

Claim:
A driver, comprising: a high-side transistor; a low-side transistor coupled to the high-side transistor; a floating-ground terminal, connected to a source of said high-side transistor; a floating-supply terminal, for providing a floating voltage for the high-side transistor driver ; a charge-pump diode, having a cathode connected to said floating-supply terminal, wherein an anode of said charge-pump diode is supplied with a bias voltage; a bootstrap capacitor, connected in series with said charge-pump diode, wherein a negative terminal of said bootstrap capacitor is connected to said floating-ground terminal, and wherein a positive terminal of said bootstrap capacitor is connected to said floating-supply terminal; a p-transistor, having a source connected to said floating-supply terminal , ; an n-transistor, having a source connected to said floating-ground terminal, wherein a gate of said n-transistor is connected to a gate of said p-transistor, wherein a drain of said n-transistor forms a junction with a drain of said p-transistor, and wherein the voltage at said junction drives a gate of said high-side transistor; and a current sink, connected from the gate of said n-transistor to said floating-ground terminal, for continuously sinking current ; a control p - transistor, having a source connected to said floating - supply terminal, wherein said control p - transistor has a drain coupled to said gate of said n - transistor; a first current source connected from said floating - supply terminal to a gate of said control p - transistor; a first diode, having an anode connected to said floating - ground terminal, wherein said first diode has a cathode connected to said gate of said control p - transistor; an on/off transistor, for switching said control p - transistor, wherein said on/off transistor has a drain connected to said gate of said control p - transistor, wherein a source of said on/off transistor is connected to the ground reference; a first inverter, having an input supplied with an input signal, wherein said first inverter has an output connected to a gate of said on/off transistor; and a speed - up circuit, having an output connected to said gate of said control p - transistor, wherein said input signal is supplied to an input of said speed - up circuit, and wherein said speed - up circuit is used for accelerating the charge - up of a parasitic capacitor of the on/off transistor .