Power regulation circuit and electronic device with the same
AssigneesHon Hai Precision Industry Co., Ltd., HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD.
InventorXING-HUA TANG
Life of this patent
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Abstract
A power regulation circuit is connected to a voltage supply unit for receiving a power-on voltage supplied by the voltage supply unit and to a voltage management unit for enabling an enable port thereof. The power regulation circuit includes a first regulation unit and the second regulation unit. The first regulation unit is used for outputting an enable signal to the enable port when the power-on voltage is lower than a threshold value such that the voltage management unit can output a first working voltage to a load via a first output port thereof. The first regulation unit stops outputting the enable signal after the expiry of a certain period of time following the drop in a power supply to a level which is below a certain threshold value for a predetermined period.
Claims20
A power regulation circuit connected to a voltage supply unit and a voltage management unit, the power regulation circuit receiving a power-on voltage supplied by the voltage supply unit and outputting an enable signal to an enable port of the voltage management unit, the power regulation circuit comprising:
- a first regulation unit for outputting the enable signal to the enable port when the power-on voltage is lower than a threshold value such that the voltage management unit can output a first working voltage to a load via a first output port thereof;
- the first regulation unit stop outputting the enable signal after the power-on voltage has been lower than threshold value for a predetermined period;
- and
- a second regulation unit for outputting the enable signal to the enable port under the control of the first regulation unit when the power-on voltage is higher than the threshold value.
An electronic device, comprising:
- a voltage supply unit for supplying a power-on voltage;
- a voltage management unit connected to the voltage supply unit for outputting a first working voltage when receiving the power-on voltage, the voltage management unit further comprises an enable port and a first output port;
- a load connected to the voltage management unit for receiving the first working voltage;
- and
- a power regulation circuit connected to the voltage supply unit for receiving the power-on voltage and to the enable port for outputting an enable signal to enable the enable port, the power regulation circuit comprising:
- a first regulation unit for outputting the enable signal to the enable port when the power-on voltage is lower than a threshold value such that the voltage management unit can output the first working voltage to the load via the first output port thereof, the first regulation unit stop outputting the first working voltage after the power-on voltage has been lower than a threshold value for a predetermined period;
- and
- a second regulation unit for outputting the enable signal to the enable port under the control of the first regulation unit when the power-on voltage is higher than the threshold value.
Dependencies are inferred from the claim text.