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US 7,679,338 B2Granted
DC/DC converter with spread spectrum switching signals
AssigneeALi Corporation
InventorsHan-Tiet Goh, Ping Chen, Chun-An Chao, Ming-Shuan Lee, Chia-Hsin Tsai
Life of this patent
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Abstract
A DC/DC converter includes a converting circuit for converting a first voltage into a second voltage; a controller for generating spread spectrum switching signals; and a switch according to the spread spectrum switching signals controlling the on/off state of the switch.
Claims13
A DC/DC converter with spread spectrum switching signals comprising:
- a converting circuit comprising:
- an input end for receiving a first DC power source;
- an output end for outputting a second DC power source;
- a first resistor coupled to the output end of the converting circuit;
- and a second resistor coupled between the first resistor and a ground end;
- a spread spectrum switching signal controller for generating a spread spectrum switching signal, wherein the spread spectrum switching signal controller controls a duty cycle of the spread spectrum switching signal according to a voltage divided by the first resistor and the second resistor;
- and
- a switch coupled to the converting circuit and the spread spectrum switching signal controller, the switch is turned on and off according to the spread spectrum switching signal.
5 more elements
Dependencies are inferred from the claim text.