Sequential Charge Pump Power Circuit for Peak Current Management
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Solution Overview
Problem
The excessive peak current generated by multiple charge pump circuits during power-up in electronic devices can cause damage to electronic components, as existing technologies do not effectively manage the simultaneous activation of these circuits.
Innovation Solution
A power providing circuit and method that includes a first and second charge pump circuit, a control circuit, a signal latch, and a voltage detector, where the second charge pump circuit remains disabled until a power-up ready signal is enabled, allowing peak currents from both circuits to be generated at different time points, thereby preventing component damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple charge pump circuits are enabled simultaneously during power-up, then the electronic device can quickly generate multiple different voltages, but excessive peak current is generated that can damage electronic components
Solution Approach 1:
The patent divides the simultaneous activation of multiple charge pump circuits into sequential stages. The first charge pump circuit is enabled first to generate its voltage, and only after it is properly established is the second charge pump circuit enabled. This segmentation of the power-up process prevents excessive peak current while still achieving quick voltage generation.
Solution Approach 2:
The patent implements preliminary action by enabling the first charge pump circuit before the second charge pump circuit. The control circuit is designed to activate charge pump circuits in a predetermined sequence, ensuring that each circuit is ready before the next one is enabled. This preliminary activation prevents current overload while maintaining efficient voltage generation.
2Loss of time
If the second charge pump circuit is enabled immediately during power-up, then voltage generation is faster, but the peak current from both circuits combines and damages electronic components
Solution Approach 1:
The patent applies dynamics by making the enablement of charge pump circuits conditional and sequential rather than static and simultaneous. The control circuit dynamically determines when to enable each charge pump circuit based on the status of previous circuits, creating a flexible power-up sequence that balances speed and safety.
Solution Approach 2:
The patent implements periodic action through the sequential enabling of charge pump circuits. Instead of all circuits being enabled at once, they are activated in periodic stages - first the first charge pump circuit, then after a brief interval, the second charge pump circuit. This periodic activation prevents current overload while maintaining reasonable power-up speed.
Data Source
AI summary
A power providing circuit and a power providing method are provided. The power providing circuit includes at least one first charge pump circuit, at least one second charge pump circuit, a first control circuit, a signal latch, and a voltage detector. The first charge pump circuit is configured to receive a first clock to generate a first pump voltage. The second charge pump circuit is configured to receive the first clock to generate the first pump voltage. The first control circuit is configured to provide the first clock to the first charge pump circuit and the at second charge pump circuit according to a power-on detection signal. The signal latch is coupled to the second charge pump circuit. The voltage detector is configured to receive an operation voltage and generate the power-on detection signal by detecting the operation voltage.