US 9,543,846 B2 · Switching power source, method and control chip for controlling the same

Abstract

A switching power source includes: a dimmer connected to an alternating current power supply and having a plurality of operating modes; a filtering/rectifying module connected to the dimmer to filter an alternating current output from the dimmer to obtain a filtered alternating current and rectify the filtered alternating current into a direct current; a dimmer switching module connected to the dimmer; a control module connected to the filtering/rectifying module and the dimmer switching module, respectively, and configured to detect a current operating mode of the dimmer when the switching power source is powered on, generate a dimmer control signal according to the current operating mode, and control the dimmer switching module to turn on or off according to the dimmer control signal to control the dimmer to enter an operating mode; and a primary constant current circuit connected to the control module and the filtering and rectifying module.

Claims19

Dependent claims

A switching power source, comprising:

a dimmer connected to an alternating current power supply and having a plurality of operating modes;
a filtering and rectifying module connected to the dimmer and configured to filter an alternating current output from the dimmer to obtain a filtered alternating current and rectify the filtered alternating current into a direct current;
a dimmer switching module connected to the dimmer;
a control module connected to the filtering and rectifying module and the dimmer switching module respectively, and configured to detect a current operating mode of the dimmer when the switching power source is powered on, to generate a dimmer control signal according to the current operating mode, and to control the dimmer switching module to turn on or off according to the dimmer control signal to control the dimmer to enter a desired operating mode;
and
a primary constant current circuit connected to the control module and the filtering and rectifying module, respectively, wherein the control module controls the primary constant current circuit to output a constant current.

3 more elements

A method of controlling a switching power source, wherein the switching power source comprises a dimmer connected to an alternating current power supply and having a plurality of operating modes;

a filtering and rectifying module connected to the dimmer and configured to filter an alternating current output from the dimmer to obtain a filtered alternating current and rectify the filtered alternating current into a direct current;
a dimmer switching module connected to the dimmer;
and a primary constant current circuit connected to the filtering and rectifying module, the method comprising:
powering on the switching power source;
detecting a current operating mode of the dimmer;
generating a dimmer control signal according to the current operating mode and controlling the dimmer switching module to turn on or off according to the dimmer control signal to control the dimmer to enter a desired operating mode;
and
controlling the primary constant current circuit to output a constant current.

5 more elements

A control chip that controls a switching power source comprising a dimmer and a filtering and rectifying module, wherein the dimmer connects to an alternating current power supply and has a plurality of operating modes, the filtering and rectifying module connects to the dimmer and is configured to filter an alternating current output from the dimmer to obtain a filtered alternating current and rectify the filtered alternating current into a direct current, and the control chip comprises:

a dimmer switching module connected to the dimmer;
and
a control module connected to the dimmer switching module and the filtering and rectifying module, respectively, and configured to detect a current operating mode of the dimmer when the switching power source is powered on, to generate a dimmer control signal according to the current operating mode, and control the dimmer switching module to turn on or off according to the dimmer control signal to control the dimmer to enter a desired operating mode.

Dependencies are inferred from the claim text.

Switching power source, method and control chip for controlling the same

Life of this patent

Switching power source, method and control chip for controlling the same

Life of this patent

Abstract

Claims19