초록 ▼

An embodiment of the present invention is a high-side driver comprising a pair of differential input controls each of which are coupled to a pair of comparators having first and second thresholds set at Vddh-1.5 volts and Vddh-2.5 volts, respectively. A logic block in front of a set-reset flip-flop

An embodiment of the present invention is a high-side driver comprising a pair of differential input controls each of which are coupled to a pair of comparators having first and second thresholds set at Vddh-1.5 volts and Vddh-2.5 volts, respectively. A logic block in front of a set-reset flip-flop recognizes only signals on the dual-input control lines where one is less than the Vddh-1.5 volt threshold and the other exceeds the Vddh-2.5 volt threshold. If signals on either or both of the dual-input control lines are between Vddh-1.5 volts and Vddh-2.5 volts, the logic block will prevent a change of state of the flip-flop which controls a high-voltage switch transistor connected to a load. The high-side driver further includes an under-voltage lockout to prevent false operation of the high-voltage switch transistor during the initial power up phase.

대표청구항 ▼

A power controller for substantially eliminating false triggering of an output by high-frequency and/or high-voltage switching of a load, comprising: first and second control lines for signaling a high-side high-voltage switch transistor to switch said load on or off; a first comparator having a fir

A power controller for substantially eliminating false triggering of an output by high-frequency and/or high-voltage switching of a load, comprising: first and second control lines for signaling a high-side high-voltage switch transistor to switch said load on or off; a first comparator having a first threshold coupled to the first and second control lines; a second comparator having a second threshold coupled to the first and second control lines, said second threshold being substantially different from said first threshold; first logic means for turning said high-side high-voltage switch transistor on when a first signal on the first control line has a magnitude greater than the magnitudes of both said first and second thresholds and a second signal on the second control line has a magnitude less than the magnitudes of both said first and second thresholds and that prevents aid high-side high-voltage switch transistor from turning on for any other condition of said first and second signals; and second logic means for turning said high-side high-voltage switch transistor off when said first signal on the first control line has a magnitude less than the magnitudes of both said first and second thresholds and said second signal on the second control line exceeds both said first and second thresholds and that prevents said high-side high-voltage switch transistor from turning off for any other condition of said first and second signals.