| 摘要 |
The present document relates to a driver for the high side switch of a half bridge. In particular, the present document relates to a method and system for driving the high side switch of a half bridge at ultra high voltage. A driver circuit (100) for a high side switch (130) of a half bridge is described. The half bridge comprises the high side switch (130) coupled to an input voltage Vin and coupled at a midpoint (132) to a low side switch (131), wherein the low side switch (131) is coupled to ground. The driver circuit (100) comprises a control signal generation unit (101, 102) adapted to generate a stream of control pulses. Furthermore, the driver circuit (100) comprises a control logic (106) adapted to generate a gate voltage for the high side switch (130) using a supply voltage Vcc based on the stream of control pulses; wherein the supply voltage Vcc is lower than the input voltage Vin; a supply voltage capacitor (123) coupled to the midpoint (132) of the half bridge and adapted to generate the supply voltage Vcc; and a decoupling capacitor (105) coupled on a first side to the control signal generation unit (101, 102) and coupled on a second side to the control logic (106); to the midpoint (132) of the half bridge via a first charging switch (121); and to the supply voltage capacitor (123) via a second charging switch (122). |
