摘要:
One embodiment includes a power regulator system (10). The system includes a gate driver circuit (28) configured to generate switching signal and a switching circuit package (12) configured to receive the switching signal at a gate terminal (18). A signal return associated with the switching signal is provided at a gate return terminal (30). The switching circuit package (12) also includes a switch (14) that is periodically activated in response to the switching signal to generate a switching voltage at a switching node terminal (22). A filter stage (32) includes an inductor interconnecting the switching node terminal (22) and a node (34). The inductor can be configured to conduct a current in response to the switching voltage to generate an output voltage. A current sense circuit (36) interconnects the gate return terminal (30) and the node (34) and measures a magnitude of the output current.
摘要:
One embodiment includes a power regulator system (10). The system includes a gate driver circuit (28) configured to generate switching signal and a switching circuit package (12) configured to receive the switching signal at a gate terminal (18). A signal return associated with the switching signal is provided at a gate return terminal (30). The switching circuit package (12) also includes a switch (14) that is periodically activated in response to the switching signal to generate a switching voltage at a switching node terminal (22). A filter stage (32) includes an inductor interconnecting the switching node terminal (22) and a node (34). The inductor can be configured to conduct a current in response to the switching voltage to generate an output voltage. A current sense circuit (36) interconnects the gate return terminal (30) and the node (34) and measures a magnitude of the output current.
摘要:
A high frequency power supply module (800) of a synchronous Buck converter having the control die (810) directly soldered drain-down to the pad (801) of a leadframe; pad (801) is connected to VIN and the VIN connection to control die (810) exhibits vanishing impedance and inductance, thus reducing the amplitude and duration of switch node voltage ringing by more than 90 %. Consequently, the input current enters the control die terminal vertically from the pad. The switch node clip (840), topping the control die (810), is designed with an area large enough to place the sync die (820) drain-down on top of the control die; the current continues to flow vertically through the converter stack. The active area of the sync die is equal to or greater than the active area of the control die; the physical area of the sync die is equal to or greater than the physical area of the control die. The source terminal of sync die (820) is connected to ground by clip (860) designed to act as a heat spreader.
摘要:
A high frequency power supply module (800) of a synchronous Buck converter having the control die (810) directly soldered drain-down to the pad (801) of a leadframe; pad (801) is connected to V IN and the V IN connection to control die (810) exhibits vanishing impedance and inductance, thus reducing the amplitude and duration of switch node voltage ringing by more than 90 %. Consequently, the input current enters the control die terminal vertically from the pad. The switch node clip (840), topping the control die (810), is designed with an area large enough to place the sync die (820) drain-down on top of the control die; the current continues to flow vertically through the converter stack. The active area of the sync die is equal to or greater than the active area of the control die; the physical area of the sync die is equal to or greater than the physical area of the control die. The source terminal of sync die (820) is connected to ground by clip (860) designed to act as a heat spreader.