An electronic device, comprising: an upper power switch and a lower power switch having current terminals coupled together at a phase node and provided in series between a first node and a reference node, an electromagnetic interference network comprising: an inductance coupled between an input voltage node and the first node; an auxiliary power switch having current terminals coupled between said first node and a second node; a capacitance coupled between said second node and the reference node; and a controller for controlling switching of said upper and lower power switches and said auxiliary power switch based on a pulse control signal which toggles between first and second states, wherein said controller is operative to: provide a first control signal to turn the upper power switch on in response to the pulse control signal switching to the second state and to turn the upper power switch off in response to the pulse control signal switching to the first state; provide a second control signal to turn the lower power switch on afterthe upper power switch is turned off and to turn the lower power switch off approximately when the voltage on the phase node goes positive after the upper switch has been turned back on; and provide a third control signal to turn said auxiliary powerswitch on afterthe lower power switch is turned off and while the upper power switch is on, and to turn said auxiliary power switch off afterthe upper power switch is turned off and while the lower power switch is off. an upper power switch and a lower power switch having current terminals coupled together at a phase node and provided in series between a first node and a reference node, an electromagnetic interference network comprising: an inductance coupled between an input voltage node and the first node; an auxiliary power switch having current terminals coupled between said first node and a second node; a capacitance coupled between said second node and the reference node; and an inductance coupled between an input voltage node and the first node; an auxiliary power switch having current terminals coupled between said first node and a second node; a capacitance coupled between said second node and the reference node; and a controller for controlling switching of said upper and lower power switches and said auxiliary power switch based on a pulse control signal which toggles between first and second states, wherein said controller is operative to: provide a first control signal to turn the upper power switch on in response to the pulse control signal switching to the second state and to turn the upper power switch off in response to the pulse control signal switching to the first state; provide a second control signal to turn the lower power switch on afterthe upper power switch is turned off and to turn the lower power switch off approximately when the voltage on the phase node goes positive after the upper switch has been turned back on; and provide a third control signal to turn said auxiliary powerswitch on afterthe lower power switch is turned off and while the upper power switch is on, and to turn said auxiliary power switch off afterthe upper power switch is turned off and while the lower power switch is off. provide a first control signal to turn the upper power switch on in response to the pulse control signal switching to the second state and to turn the upper power switch off in response to the pulse control signal switching to the first state; provide a second control signal to turn the lower power switch on afterthe upper power switch is turned off and to turn the lower power switch off approximately when the voltage on the phase node goes positive after the upper switch has been turned back on; and provide a third control signal to turn said auxiliary powerswitch on afterthe lower power switch is turned off and while the upper power switch is on, and to turn said auxiliary power switch off afterthe upper power switch is turned off and while the lower power switch is off.