Power Management Chip Starting Circuit Dynamic Resistor Disconnection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional power supply management chip starting circuits continue to consume electrical energy after the chip begins to work due to the persistent operation of the external resistor.
Innovation Solution
A starting circuit for power supply management chips that includes a switching circuit controlled by a voltage detecting circuit to disconnect the external power supply from the starting capacitor once the starting voltage is reached, along with a voltage maintaining circuit to ensure the capacitor's voltage is maintained from the chip's work circuit, reducing energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an external resistor is used to charge the starting capacitor, then the chip can be started and the capacitor charged, but the external resistor continues to consume electrical energy after the chip begins to work
Solution Approach 1:
The patent applies the dynamics principle by making the resistor connection dynamic rather than static. A switching circuit controlled by a voltage detecting circuit dynamically connects or disconnects the external resistor from the starting capacitor based on the capacitor's voltage level. When the capacitor voltage reaches a predetermined threshold indicating successful startup, the switching circuit automatically disconnects the external resistor, eliminating continuous energy consumption while ensuring reliable startup operation.
2Reliability
If the external resistor remains connected to maintain capacitor charging, then the capacitor voltage is maintained, but continuous energy consumption increases
Solution Approach 1:
The patent implements feedback control through a voltage detecting circuit that continuously monitors the starting capacitor's voltage level. When the capacitor voltage reaches a predetermined threshold value indicating sufficient charge for chip operation, the detecting circuit sends a signal to the switching circuit to disconnect the external resistor. This feedback mechanism ensures the capacitor maintains adequate voltage for reliable operation while automatically eliminating unnecessary energy consumption once startup is complete.
Data Source
AI summary
A starting circuit (10) of a power management chip, comprising: a starting capacitor (C3) which is used for connecting a power supply via an external resistor (R2) to perform charging; a switch circuit (100) which is connected between the external resistor (R2) and the starting capacitor (C3); a voltage detection circuit (200) which is used for detecting a voltage on the starting capacitor (C3) and is connected to the switch circuit (100) so as to control the on/off switching of the switch circuit (100); and a voltage maintaining circuit (300) which is connected between the starting capacitor (C3) and an operating circuit of the power management chip and is used for acquiring a voltage that maintains the starting capacitor (C3) from the operating circuit of the power management chip, wherein when the voltage detection circuit (200) detects that the starting capacitor (C3) reaches the starting voltage of the power management chip, the broken circuit of the switch circuit (100) is controlled. Further provided is a power management chip including the above-mentioned starting circuit (10). Disconnecting an external power source from the starting capacitor after the operating circuit of the power management chip is started can reduce the electric energy consumption.