Method of and circuit for brown-out detection

摘要

A circuit and method for detecting a brown-out condition and providing a feed-forward transfer function in a power supply circuit. A comparison circuit is coupled to a delay element through a latch. A second delay element is connected between the first delay element and an input of the latch. The output of the first delay element is connected to a clamping circuit via a logic circuit. A first voltage is compared with a reference voltage to generate a comparison voltage, which is transmitted through the latch and the first delay element. The comparison voltage is monitored at an output of the first delay element. A brown-out condition occurs if the comparison voltage being monitored at the output of the first delay element results from the first voltage being less than the reference voltage.

主权项

1. A brown-out detection circuit, comprising:
a circuit element having first and second inputs and an output, the circuit element capable of comparing at least two signals; a latch having first and second inputs and an output, the first input of the latch coupled to the output of the circuit element; a first delay element having an input coupled to the output of the latch; a second delay element having an input coupled to the output of the first delay element and an output coupled to the second input of the latch; and a logic circuit having at least first and second inputs and an output, the first input coupled to the output of the first delay element and the second input coupled to the output of the circuit element.