DC Power Conversion Circuit With Separate Grounding Node
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Solution Overview
Problem
Existing DC-to-DC power conversion circuits with constant current output are complex and costly due to the need for a voltage regulator to pre-regulate control signals at different voltage levels, which increases circuit complexity and production costs.
Innovation Solution
A DC power conversion circuit with a control signal generator that does not share the same grounding node as other devices, allowing the control signal to be generated at the high-side voltage level, eliminating the need for a voltage regulator by arranging resistors at the high-side voltage level and coupling the control signal generator to a different grounding end.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a voltage regulator is used to pre-regulate the control signal to an appropriate voltage level, then the switch transistor can operate at the high voltage side, but the circuit complexity and area increase due to the transformer device
Solution Approach 1:
The patent extracts and removes the voltage regulator (transformer device) from the circuit by reconfiguring the control signal generator to operate directly at the high voltage side through a separate grounding node, thereby eliminating the component that caused circuit complexity and area increase while maintaining the ability to drive the switch transistor at the required voltage level
Solution Approach 2:
The patent introduces a new dimension by creating a separate grounding node (GND1) for the control signal generator, which allows the control signal to be generated at a different voltage reference level than the main circuit ground (GND2). This dimensional separation in voltage reference enables direct high-side switching control without requiring voltage level translation through a transformer
2Device complexity
If the control signal generator shares the same grounding node as other devices, then the circuit structure is simplified, but the control signal must be pre-regulated to the appropriate voltage level
Solution Approach 1:
The patent segments the grounding system into two independent grounding nodes: GND1 for the control signal generator and GND2 for the main power circuit. This segmentation allows each subsystem to operate with its own voltage reference, enabling the control signal generator to directly output signals at the required voltage level for high-side switching without needing additional voltage regulation components
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 configuration simplifies the circuit, reduces production costs, and maintains constant current output to the load circuit by directly sending the control signal to the switch without transformer assistance, thereby enhancing efficiency and reducing complexity.
Implementation Method 1
Once the switch transistor 102 is turned off, the inductor 108 accordingly generates an inverse-polarity voltage, so that the diode 106 bears a forward bias and loop L1 begins conducting current
Implementation Method 2
As the switch transistor 102 is turned on, the diode 106 bears a reverse bias, and thereby a loop L1 becomes open. As the switch transistor 102 is turned off, the inductor 108 accordingly generates an inverse-polarity voltage, so that the diode 106 bears a forward bias and loop L1 begins conducting current
Implementation Method 3
The DC/DC voltage converter 10 includes a capacitor 110
Implementation Method 4
a resistor 104
Data Source
AI summary
A DC power conversion circuit with constant current output includes a DC voltage source, a driving circuit and a control signal generator. The DC voltage source is used for providing DC power. The driving circuit includes a switch, a resistor, a diode, and an inductor. The switch has three ends, one used for receiving a control signal. Furthermore, the switch is used for conducting or cutting off a coupling between the other two ends according to the control signal. The resistor is coupled between the switch and a first grounding end. The diode has a first end and a second end coupled to a second grounding end. The inductor has a first end coupled to the first grounding end, and a second end coupled to a load circuit. The control signal generator generates the control signal for the second end of the switch according to a current of the resistor.