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US 6,204,648 B1Granted
DC-to-DC converter capable of preventing overvoltage
AssigneeFujitsu Limited
InventorsMitsuo Saeki, Hidetoshi Yano, Hidekiyo Ozawa
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AssigneeFujitsu Limited
InventorsMitsuo Saeki, Hidetoshi Yano, Hidekiyo Ozawa
Estimating the term…
To avoid burning out a capacitor in a synchronous rectification type DC-to-DC converter due to overvoltages, the synchronous rectification type DC-to-DC converter includes a storage unit storing therein power derived from a power supply, switching elements connecting and disconnecting respective signal paths from power and ground, and a control unit controlling the connecting/disconnecting operations of the switching elements to maintain a voltage output from the storage unit at a predetermined value. The DC/DC converter also includes an overvoltage detecting unit monitoring a voltage derived from the power supply to thereby output an alarm signal when the voltage derived from the power supply exceeds a preselected voltage value, a shortcircuiting unit influencing the connecting conditions of the switching elements when the alarm signal from the overvoltage detecting unit is input therein, whereby the voltage derived from the power supply is shortcircuited, and an interrupting unit interrupting one of the signal paths by the power shortcircuited by the shortcircuiting unit.
A DC/DC converter comprising:
A DC/DC converter, comprising:
A controller for a DC/DC converter having a storage unit storing power derived from a power supply, a first switch element, provided between the power supply and the storage unit, selective connection the storage unit to the power supply, a second switch element, provided between the ground and a connecting point of the first switch and the storage unit, to selectively connect the connecting point to the ground and a control unit controlling the to selectively connect operations of the first switch element and the second switch element so as to maintain a voltage outputted from the storage unit at a predetermined value, said controller comprising;
A controller for a DC/DC converter having a storage unit storing power from a power supply, a first switch, provided between the power supply and the storage unit, to selectively connect the storage unit to the power supply and a second switch, provided between ground and the connecting point of the first switch and the storage unit, to selectively connect the connecting point to the ground, and a control unit controlling the first switch and the second switch so as to maintain a voltage outputted from the storage unit at a predetermined value, said controller comprising;
A DC/DC converter having an output, comprising:
A DC/DC converter comprising:
A control circuit for a DC/DC converter having a main switch and a synchronous rectification switch, to effect a DC/DC conversion, comprising:
A control circuit for a DC/DC converter having a main switch, a synchronous rectification switch, an inductor connected to said main switch and a capacitor connected to said inductor and smoothing an output of said inductor, to effect a DC/DC conversion, comprising:
A control circuit for a DC/DC converter having a main switch and a synchronous rectification switch, to effect a DC/DC conversion, comprising:
A control circuit for a DC/DC converter having a main switch, a synchronous switch, an inductor connected to said main switch and a capacitor connected to said inductor and smoothing an output of said inductor, to effect a DC/DC conversion, comprising:
A control circuit for a DC/DC converter having a main switch and a synchronous rectification switch, comprising:
A control circuit for a DC/DC converter having a main switch, a synchronous rectification switch, an inductor connected to the main switch and a capacitor connected to the inductor and smoothing an output of the inductor, to effect a DC/DC conversion, comprising:
A control circuit for a DC/DC converter having a main switch and a synchronous rectification switch, comprising:
A control unit for a DC/DC converter having a main switch, a synchronous rectification switch, an inductor connected to the main switch and a capacitor connected to the inductor for smoothing an output of the inductor, to effect a DC/DC conversion, comprising:
A control circuit for controlling a DC/DC converter having a main switch and a synchronous rectification switch, comprising:
A control method for a DC/DC converter having an input, a main switch and a synchronous rectification switch, comprising:
Dependencies are inferred from the claim text.