US 2011/0215780 A1 · DE-GLITCH SWITCHING CONVERTING CIRCUIT AND CONTROLLER THEREOF

Abstract

A de-glitch switching converting circuit and a controller thereof are provided. In the embodiment of the invention, the circuit can filter noises with high frequency by way of time judgment, so as to avoid the erroneous operation of the controller affecting the stability of the output voltage or the output current. Compared with the method of using low-pass filters with large capacitors to filter noises, highly increasing the cost of the circuit is unnecessary in the embodiment of the invention. The circuit in the embodiment of the invention also has the capability for filtering noises with high amplitudes. In addition, by setting suitable parameters, the circuit in the embodiment of the invention can also avoid affecting the transient response of the circuit while filtering noises.

Claims20

Dependent claims

A controller of a de-glitch switching converting circuit, comprising:

a noise filtering unit determining whether to output a pulse signal according to a predetermined time length and a condition of which an output voltage of the de-glitch switching converting circuit is lower than a predetermined output voltage;
an on-time unit outputting a constant pulse width signal according to the pulse signal;
and
a driving unit controlling the de-glitch switching converting circuit according to the constant pulse width signal such that the output voltage is stabilized at the predetermined output voltage.

1 more element

Dependencies are inferred from the claim text.

De-glitch switching converting circuit and controller thereof

Life of this patent

De-glitch switching converting circuit and controller thereof

Life of this patent

Abstract

Claims20