SWITCHING DRIVER CAPABLE OF REDUCING EMI EFFECT AND POWER RIPPLE

摘要

A switching driver capable of reducing EMI effect and power ripple is disclosed. When the switching driver wants to increase the voltage of an output end, a non-overlapping signal generator controls a low-side driver to quickly turn off a low-side switch, and detects an ascending slope of the voltage of the output end to control a cut-off velocity of a low-side auxiliary switch. When the switching driver wants to decrease the voltage of the output end, the non-overlapping signal generator controls a high-side driver to quickly turn off a high-side switch, and detects a descending slope of the voltage of the output end to control a cut-off velocity of a high-side auxiliary switch. As the descending slope becomes higher, the cut-off velocity of the high-side auxiliary switch becomes slower. Accordingly, the switching driver can reduce EMI effect and power ripple operating in a dead-time.