Power management system with timing from analog soft start circuits
CN120729019APending Publication Date: 2025-09-30NXP USA INC
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Patent Information
- Application Number
- CN202510350287.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2024-03-27
- Filing Date
- 2025-03-24
- Publication Date
- 2025-09-30
AI Technical Summary
Technical Problem
In ultra-low power mode, the existing power management system lacks an effective undervoltage detection and recovery mechanism, resulting in the inability to handle undervoltage conditions in a timely manner, affecting system stability and reliability.
Method used
An analog soft-start circuit is used to generate a timing signal, combined with a discharge circuit and control logic to ensure that the output capacitor is fully discharged after undervoltage detection, ensuring that the system resumes normal operation.
Benefits of technology
Effective detection and processing of undervoltage conditions in ultra-low power mode is achieved, ensuring reliable operation of the system after undervoltage recovery, avoiding the use of digital circuits and thus reducing power consumption.
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Figure CN120729019A_ABST
Abstract
Examples of devices and methods for power management are disclosed herein. In an example, an apparatus includes a charging circuit; a discharge circuit; an undervoltage detection circuit in which the charging circuit and the discharging circuit are coupleable to a capacitor, and in which the charging circuit includes an analog soft start circuit; and a control logic configured to determine a discharge time of the capacitor in response to a timing signal generated in response to a voltage from the analog soft start circuit.
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