POWER SUPPLY CONTROLLER AND RELATED METHODS

摘要

A power supply controller having a shortened reset time due to a small hiccup voltage includes an electrical circuit providing a repeated voltage hiccup of a supply voltage of the controller of a switched-mode power supply (SMPS) when the controller enters a latched state. A plurality of comparators each have an input coupled with the controller supply voltage. A multiplexer and two latches are included, each coupled with one or more comparator outputs, and a restart controller is coupled with an output of one of the latches. The restart controller in various implementations toggles a switch to activate and deactivate a current sink to create the supply voltage hiccup. In other implementations, the switch is excluded and the restart controller toggles a voltage startup transistor to couple and decouple a voltage source with the supply voltage to create the voltage hiccup.

主权项

1. A power supply controller, comprising:
an electrical circuit configured to provide a repeated voltage hiccup of a supply voltage of a power supply controller of a switched-mode power supply (SMPS) when the power supply controller is in a latched state, the electrical circuit comprising:
a first comparator, a second comparator, a third comparator, and a fourth comparator, each of the four comparators comprising an input coupled with the supply voltage of the power supply controller;a multiplexer comprising a first input coupled with an output of the first comparator, the multiplexer also comprising a second input coupled with an output of the second comparator;a first latch comprising a first input coupled with an output of the multiplexer, the first latch also comprising a second input coupled with an output of the third comparator;a second latch comprising an input coupled with an output of the fourth comparator;a restart controller comprising an input coupled with an output of the first latch, and;a switch configured to be toggled by the restart controller between a closed state and an open state to alternately decrease and increase the supply voltage, respectively, to create the repeated voltage hiccup.