Droop Voltage Circuit for Precise Load Line Resistance Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing switching power supplies face limitations in regulation range and accuracy of load line resistance, necessitating improved droop voltage generation for high-accuracy applications.
Innovation Solution
A droop voltage generation circuit utilizing a digital-to-analog converter (DAC) and resistor array to program load line resistance, incorporating a reference current generation unit, first and second regulation units, and operational amplifier circuit for precise control of droop voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing droop voltage generation circuits are used, then the circuit structure is simple, but the regulation range and accuracy of load line resistance are limited
Solution Approach 1:
The droop voltage generation circuit is segmented into multiple functional modules: reference voltage generation unit with multiple reference voltages, first regulation unit with multiple first resistors, second regulation unit with multiple second resistors, and operational amplifier. Each module contributes to the overall regulation accuracy through digital-to-analog conversion, enabling precise load line resistance regulation while maintaining modular circuit structure.
Solution Approach 2:
The circuit implements dynamic regulation of droop voltage through digital control signals that selectively activate different reference voltages and resistor combinations. The first and second regulation units can dynamically adjust their resistance values based on control signals, allowing the load line resistance to be programmably adjusted across a wide range with high precision.
2Adaptability or versatility
If fixed load line resistance is used, then the circuit design is simple, but the adaptability to different load conditions is poor
Solution Approach 1:
The regulation units incorporate digital-to-analog conversion capability that allows the load line resistance to be dynamically adjusted according to different load conditions. Control signals can selectively activate specific reference voltages and resistor combinations, enabling the circuit to adapt to various operating scenarios while maintaining a relatively compact structure.
Solution Approach 2:
The circuit changes its electrical parameters (resistance values) by selectively connecting different reference voltages and resistor combinations based on control signals. This allows the load line resistance to be programmably adjusted to match different load requirements, transforming a static circuit into a dynamically adaptable system.
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
Enables higher accuracy and wider range of load line resistance regulation, ensuring stable output voltage adjustments in response to load changes.
Implementation Method 1
a voltage to current conversion circuit, configured to convert a sampling signal of the output current of the switching power supply into the plurality of reference currents
Implementation Method 2
incorporating a reference current generation unit, first and second regulation units, and operational amplifier circuit for precise control of droop voltage
Data Source
AI summary
The present disclosure provides a droop voltage generation circuit, a switching power supply and a droop voltage generation method. The circuit includes a reference current generation unit, a first regulation unit and a second regulation unit. The reference current generation unit is configured to generate a plurality of reference currents according to the output current of the switching power supply. The first regulation unit is configured to generate a regulation current according to a first regulation code and the plurality of reference currents. The second regulation unit is configured to generate the droop voltage according to a second regulation code and the regulation current, wherein the first regulation code and the second regulation code can be configured at least according to a target value of load line resistance. The present disclosure achieves higher accuracy and wider range of regulation of load line resistance with adjustable gain.