Low Loss IC Self Supply Power Converter
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Solution Overview
Problem
Power converters using an auxiliary supply to provide control power to a primary controller often face insufficient power delivery, leading to voltage maintenance issues, and existing solutions that supplement power from a high-voltage monitor terminal can be costly and inefficient.
Innovation Solution
The system provides supplemental electrical power to the control voltage terminal from a high-voltage monitor terminal during voltage valleys, reducing impedance and enabling accurate voltage measurement while maintaining energy efficiency by adjusting current levels based on input voltage conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power is supplemented from the high-voltage monitor terminal, then the control voltage terminal receives sufficient power, but the system requires costly high-voltage capable components and reduces energy efficiency
Solution Approach 1:
The patent applies preliminary action by detecting voltage valleys in advance and preemptively drawing current from the monitor terminal during these low-voltage periods to charge the control voltage capacitor. This prevents power deficiency before it occurs, ensuring the control voltage terminal receives sufficient power without requiring costly high-voltage components throughout the circuit.
Solution Approach 2:
The patent implements dynamics by making the monitor terminal impedance adaptive - it switches between high impedance (during normal operation to preserve measurement accuracy) and low impedance (during voltage valleys to transfer power). This dynamic impedance adjustment allows the system to achieve power sufficiency without permanently requiring high-voltage capable components.
2Use of energy by moving object
If the monitor terminal impedance is reduced to provide power, then energy transfer is improved, but voltage measurement accuracy deteriorates
Solution Approach 1:
The patent applies periodic action by intermittently reducing the monitor terminal impedance only during detected voltage valleys rather than maintaining low impedance continuously. This periodic impedance reduction allows efficient energy transfer during critical low-voltage periods while preserving measurement accuracy during normal operating conditions.
Solution Approach 2:
The patent implements dynamics through adaptive impedance control that adjusts the monitor terminal impedance based on real-time voltage conditions. The impedance is dynamically switched between high and low states, optimizing both energy transfer efficiency and voltage measurement accuracy for different operating conditions.
Data Source
AI summary
A power converter includes a primary controller having a control voltage terminal for receiving electrical power and a monitor terminal electrically coupled to an input sensing node with an input voltage varying periodically below a first start threshold voltage to define valleys. The power converter includes a first current source configured to drive a first electrical current from the monitor terminal to the control voltage terminal in response to the input voltage being less than the first start threshold voltage. A delay timer delays driving the first electrical current to center a supply time interval within a valley. A second current source drives a second electrical current from the monitor terminal to the control voltage terminal in response to the input voltage being less than a second start threshold voltage to reduce an impedance of the monitor terminal when the input voltage is in a valley.