Current limit control circuit for boost converter in CCM
By introducing a switching device and a turn-off time signal generation device into the boost converter, the problem of unstable inductor current during current limiting is solved, achieving stable current limiting control and stable battery voltage, thus ensuring the normal operation of the boost converter and precise current limiting.
CN115441701BActive Publication Date: 2026-06-19GOODIX TECH HK CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- GOODIX TECH HK CO LTD
- Filing Date
- 2022-09-15
- Publication Date
- 2026-06-19
Smart Images
Figure CN115441701B_ABST
Abstract
A control circuit for a boost converter includes a switching device for switching the boost converter to perform cycles, wherein each cycle includes an energy charging state in which an inductor stores energy supplied by an input voltage and an energy discharging state in which the inductor supplies energy to the output of the boost converter; a comparison device for determining whether the current at the inductor is higher than a predetermined maximum current; and a turn-off time signal generation device for generating a turn-off time signal based on whether the current at the inductor is higher than the predetermined maximum current, wherein the turn-off time signal is used to determine the duration of the discharge state of the next switching event, and the switching device is used to switch the boost converter based on the generated turn-off time signal.
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