Resistance determining system
AssigneesHon Hai Precision Industry Co., Ltd., HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD.
InventorsQI-YAN LUO, SONG-LIN TONG
Life of this patent
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Abstract
A resistance determining device configured for determining a resistance for a digital power supply control microchip includes a digital potentiometer and a controller. The digital potentiometer is electrically connected to the digital power supply control microchip. The controller is electrically connected to the digital potentiometer. The controller obtains internal current and load current of the digital power supply control microchip, compares the internal current with the load current, and changes a current resistance of the digital potentiometer to be a resistance according to a difference between the internal current and the load current. The resistance makes the internal current consistent with the load current.
Claims13
A resistance determining device configured for determining resistance of a digital power supply control microchip, the device comprising:
- a digital potentiometer electrically connected to the digital power supply control microchip;
- a controller electrically connected to the digital potentiometer, the controller obtaining internal current and load current of the digital power supply control microchip, comparing the internal current with the load current, and changing a current resistance of the digital potentiometer to be a resistance according to a difference between the internal current and the load current;
- wherein the resistance makes the internal current consistent with the load current.
A resistance determining system configured for determining a resistance for a digital power supply control microchip, the system comprising:
- a measuring device electrically connected to the digital power supply control microchip, the measuring device measuring internal current and load current of the digital power supply control microchip;
- and
- a resistance determining device, the device comprising:
- a digital potentiometer electrically connected to the digital power supply control microchip;
- a controller electrically connected to the digital potentiometer, the controller obtaining internal current and load current of the digital power supply control microchip, comparing the internal current with the load current, and changing a current resistance of the digital potentiometer to be a resistance according to a difference between the internal current and the load current;
- wherein the resistance makes the internal current consistent with the load current.
Dependencies are inferred from the claim text.