Power management and control apparatus for resetting a latched protection in a power supply unit
First Claim
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1. A power management and control apparatus for resetting a latched protection in a power supply unit, comprising:
- a reset unit for detecting an input voltage and an output voltage to output a reset control signal to reset the latch protection;
at least one failure protection unit for outputting a corresponding protection control signal when a failure happens; and
a first logic circuit which receives the signals outputted from the reset unit and the at least one failure protection unit to output a control signal to control the power latch;
wherein the first logic circuit latches the power supply unit by latching the control signal in OFF state when a failure happens and the input voltage is not lower than a predefined threshold value; and
the first logic circuit will reset the latched protection of power when a failure happens and the input voltage is lower than a predefined threshold value.
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Abstract
A controller which has functions of remote control, multiple protection and PWM inside. The controller can shut down and latch the converter, when a failure happens (such as under voltage and over voltage of output, and over power protection). But, under-voltage and over-power protection will also happen when Vin is decreased by AC interruption or Vin source is removed. This invention is to provide a method to reset the latch protection by detecting Vin and Vo voltage.
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Citations
6 Claims
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1. A power management and control apparatus for resetting a latched protection in a power supply unit, comprising:
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a reset unit for detecting an input voltage and an output voltage to output a reset control signal to reset the latch protection; at least one failure protection unit for outputting a corresponding protection control signal when a failure happens; and a first logic circuit which receives the signals outputted from the reset unit and the at least one failure protection unit to output a control signal to control the power latch; wherein the first logic circuit latches the power supply unit by latching the control signal in OFF state when a failure happens and the input voltage is not lower than a predefined threshold value; and
the first logic circuit will reset the latched protection of power when a failure happens and the input voltage is lower than a predefined threshold value. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification