Control Circuit, Control Method, DC-DC Converter and Electronic Device
AssigneeST-Ericsson SA
InventorsJingwen Mao, Zhiyong Luo, Kaihua Zheng
Life of this patent
Estimating the term…
Abstract
A control circuit (115), a control method, a DC-DC converter and an electronic device are provided. The control circuit (115) is used to control the DC-DC converter to switch its operation modes. In the control circuit (115), whether mode of the DC-DC converter is to be switched is judged according to parameters of a first duration of an active duration and a second duration of an inactive duration. Comparison of analogue values is prevented, and as a result, the use of the analogue comparator is reduced, thus the influence of the semiconductor processes on designing a controller can be reduced.
Claims14
A method for controlling a DC-DC converter, which may be operated in a continuous mode and a discontinuous mode, the discontinuous mode comprising active and inactive durations, the method comprising:
- operating the DC-DC converter in the discontinuous mode;
- measuring a first duration of an active duration and a second duration of an inactive duration;
- judging whether a predefined criterion is satisfied according to the first duration and the second duration;
- and
- switching the DC-DC converter to operate in the continuous mode if the predefined criterion is satisfied.
A DC-DC converter, which may be operated in a continuous mode and a discontinuous mode, the discontinuous mode comprising active and inactive durations, the DC-DC converter comprising:
- an input node, an output node, and a first switch, a second switch, an inductor, a capacitor, a control circuit connected between the input node and the output node, wherein the control circuit is configured to:
- switch the DC-DC converter between the continuous mode and the discontinuous mode;
- switch the DC-DC converter between an active duration and an inactive duration of the discontinuous mode;
- measure a first duration of the active duration and a second duration of the inactive duration;
- judge whether a predefined criterion is satisfied according to the first duration and the second duration;
- and
- if the predefined criterion is satisfied, switch the DC-DC converter from the discontinuous mode to the continuous mode.
Dependencies are inferred from the claim text.