Adaptive Voltage Position DC-DC Regulator Circuit Topology
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Solution Overview
Problem
Prior art adaptive voltage position (AVP) control in DC-DC regulators requires additional pins and consumes power due to the use of a current sensing resistor, complicating the internal circuit and reducing efficiency.
Innovation Solution
The proposed solution involves a DC-DC regulator with a sensing unit comprising a resistor and capacitor in series, a feedback unit with resistors, and a comparator-based control circuit that utilizes the 'virtual short' characteristic to achieve AVP control without the need for a current source or additional pins, simplifying the internal circuit and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a current sensing resistor and additional pins are used for AVP control, then the output voltage variation range is improved, but the device complexity and power consumption increase
Solution Approach 1:
The patent extracts and eliminates the current sensing resistor and additional pins from the conventional AVP control circuit, retaining only the essential feedback mechanism through the existing feedback resistors and comparator, thereby reducing device complexity while maintaining AVP functionality
Solution Approach 2:
The existing feedback resistors and comparator in the DC-DC regulator are made to serve dual functions: both voltage feedback and current sensing for AVP control, eliminating the need for separate current sensing components and reducing overall device complexity
2Adaptability or versatility
If a current sensing resistor is used for AVP control, then the output voltage variation range is improved, but the power consumption increases
Solution Approach 1:
The patent removes the current sensing resistor from the circuit, eliminating the power consumption associated with this component while preserving the AVP control functionality through alternative implementation using existing circuit elements
Solution Approach 2:
The circuit utilizes its own existing feedback mechanism and components to perform current sensing and AVP control functions, eliminating the need for separate power-consuming current sensing components
3Adaptability or versatility
If additional pins are used for AVP control, then the output voltage variation range is improved, but the device complexity increases
Solution Approach 1:
The existing feedback pins and circuit nodes are made to serve multiple purposes including voltage feedback, current sensing, and AVP control, eliminating the need for additional dedicated pins while maintaining full AVP functionality
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for a wide variation range of output voltage with low power loss while eliminating the need for external components like current sources and additional pins, resulting in a simpler and more efficient AVP control mechanism.
Implementation Method 1
a comparator-based control circuit that utilizes the 'virtual short' characteristic to achieve AVP control
Data Source
AI summary
The present invention discloses an adaptive voltage position DC-DC regulator and the method thereof, the regulator comprising a main circuit and a control circuit which includes a sensing unit, a feedback unit, a comparing unit, a PWM generator and a driver. The regulator realizes the adaptive voltage position control with simple internal circuit and fewer pins.