Mobile PMIC Reset Circuit for Manual Reboot and Leakage Control
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Solution Overview
Problem
Mobile devices with PMICs lacking a manual reset function face challenges in error correction and stability, especially under varying operating conditions and low temperatures, due to restricted error correction capabilities post-manufacturing.
Innovation Solution
A method and apparatus that include an input unit for creating a specific reset signal, a reset unit to generate a manual reset signal, and a power unit to control battery power supply to the PMIC, allowing for manual resets and preventing leakage currents, ensuring stable operation across temperature conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a PMIC without manual reset function is used, then device integration is improved, but reset capability is lost
Solution Approach 1:
The patent introduces a reset control circuit as an intermediary component between the user input and the PMIC. This circuit generates a reset signal that indirectly controls the PMIC's reset function, enabling manual reset capability without modifying the PMIC's internal structure. The reset control circuit acts as a mediator that bridges the gap between the user's reset request and the PMIC's power control mechanisms.
2Ease of operation
If manual reset function is added to PMIC, then reset capability is improved, but leakage current increases
Solution Approach 1:
The reset control circuit serves as an intermediary that manages the reset function without requiring direct modification of the PMIC. By controlling the power supply to the PMIC through this intermediate circuit, the system can implement manual reset while preventing direct leakage current paths that would occur if the PMIC itself had manual reset capabilities.
Solution Approach 2:
The patent segments the reset function from the PMIC by introducing a separate reset control circuit. This segmentation allows the reset capability to be implemented independently, enabling precise control over when power is supplied to the PMIC, thereby preventing continuous leakage current while maintaining reset functionality.
3Reliability
If reset function is implemented in PMIC, then error correction is improved, but operation stability in low temperature deteriorates
Solution Approach 1:
The reset control circuit acts as an intermediary that provides error correction capabilities without requiring internal PMIC modifications. This external control approach allows for reset functionality that can be activated based on error conditions while maintaining the PMIC's original temperature-stable design characteristics.
Data Source
AI summary
A method and apparatus of resetting a mobile device including a Power Management Integrated Circuit (PMIC) with no manual reset function are provided. The apparatus includes an input unit for creating a specific input signal for a reset according to a user's input. The apparatus includes a reset unit for creating a manual reset input signal in response to the specific input signal, and for blocking battery power supplied to the PMIC by using the manual reset input signal and a signal created during operations of the mobile device. The reset apparatus includes a power unit for supplying the battery power.