Power supply controller and mechanical apparatus using the same
AssigneeHitachi, Ltd.
InventorsChihiro Sato, Mitsuhiko Watanabe, Ko Moriya, Hirofumi Kurimoto
Life of this patent
Estimating the term…
Abstract
There is a need for improving switching regulator characteristics and providing a stable power supply controller. The power supply controller uses a battery and either or both functions of stepping up and stepping down a battery voltage. The power supply controller includes a means that prevents a ripple voltage from occurring by stopping the up conversion function for a switching operation in connection with a battery during a predetermined period without changing conditions for a conventional switching device or smoothing circuit and fast stabilizes a primary voltage using only the down conversion function.
Claims20
A power supply controller comprising:
- an up conversion means for stepping up a primary voltage from a battery voltage;
- a battery voltage detection means;
- and
- an up conversion stop means for allowing the up conversion means to stop stepping up a voltage until a secondary voltage reaches a regulation value,
- wherein the power supply controller generates a secondary voltage from a generated primary voltage.
A power supply controller comprising:
- a down conversion means for stepping down a primary voltage from a battery voltage;
- an up conversion means for stepping up a primary voltage from a battery voltage;
- a battery voltage detection means;
- and
- an up conversion stop means for allowing the up conversion means to stop stepping up a voltage until a secondary voltage reaches a regulation value,
- wherein the power supply controller generates a secondary voltage from a generated primary voltage.
A power supply controller comprising:
- an up conversion means for stepping up a primary voltage from a battery voltage;
- a secondary voltage generation means for generating a secondary voltage from a generated primary voltage;
- a Power On Reset signal generation means for supplying a Power On Reset signal to the secondary voltage generation means;
- a battery voltage detection means;
- and
- an up conversion stop means for stopping an up conversion operation until the Power On Reset signal is released.
A power supply controller comprising:
- a down conversion means for stepping down a primary voltage from a battery voltage;
- an up conversion means for stepping up a primary voltage from a battery voltage;
- a secondary voltage generation means for generating a secondary voltage from a generated primary voltage;
- a Power On Reset signal generation means for providing a Power On Reset signal to the secondary voltage generation means;
- a battery voltage detection means;
- and
- an up conversion stop means for stopping an up conversion operation until the Power On Reset signal is released.
Dependencies are inferred from the claim text.