A power supply voltage boosting circuit

By designing a power supply voltage boost circuit including power switching, boost and voltage adjustment circuit, the voltage difference problem of MBUS equipment in different manufacturers is solved, and dynamic voltage adjustment and stable communication are achieved.

CN222750328UActive Publication Date: 2025-04-11LUOYANG VISION SCI & TECH
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Patent Information

Application Number
CN202421213923.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-30
Publication Date
2025-04-11
Estimated Expiration
2034-05-30

AI Technical Summary

Technical Problem

There are differences in MBUS voltages from different manufacturers, resulting in mismatch in voltages during communication, which may cause unstable equipment to work or fail to start, or reduce service life.

Method used

A power supply voltage boost circuit is designed, including power supply power switching circuit, primary step-up circuit, secondary step-up circuit, voltage adjustment circuit and current detection circuit. By adjusting the resistance combination, the output voltage value is changed to adapt to MBUS equipment from different manufacturers.

Benefits of technology

It realizes dynamic voltage adjustment, adapts to a variety of MBUS devices, ensures communication stability and equipment service life, and avoids equipment failures caused by voltage mismatch.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a power supply voltage boost circuit, which belongs to the field of power supply circuits; it includes a power supply switching circuit, a primary boost circuit, a secondary boost circuit, a voltage adjustment circuit and a current detection circuit; the power supply switching circuit is electrically connected to the primary boost circuit and the secondary boost circuit respectively; the primary boost circuit includes a first DC / DC boost chip U20 and a first voltage stabilizing circuit, and a first Schottky diode D20; the secondary boost circuit includes a second DC / DC boost chip U30 and a second voltage stabilizing circuit, and a second Schottky diode D30; the voltage adjustment circuit includes an I / O expander, and the P7 pin of the I / O expander is connected with a resistor R39, the P6 pin is connected with a resistor R38, the P5 pin is connected with a resistor R37, and the P4 pin is connected with a resistor R36, and the resistors R39, R38, R37 and R36 are connected in parallel in the power supply output circuit. Beneficial effect: The purpose of designing the circuit in this way is to use the principle of resistors in parallel and in series, and to change the output voltage value by adjusting different resistor combinations.
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Claims

1. A power supply voltage boost circuit, characterized in that: It includes a power supply switching circuit, a primary boost circuit, a secondary boost circuit, a voltage adjustment circuit, a current detection circuit, and a power output circuit; the power supply switching circuit is electrically connected to the primary boost circuit and the secondary boost circuit respectively; the primary boost circuit includes a first DC / DC boost chip U20, a first voltage stabilizing circuit, and a first Schottky diode D20; the secondary boost circuit includes a second DC / DC boost chip U30, a second voltage stabilizing circuit, and a second Schottky diode D30; the voltage adjustment circuit includes an I / O expander, and the P7 pin of the I / O expander is connected to a resistor R39, the P6 pin is connected to a resistor R38, the P5 pin is connected to a resistor R37, and the P4 pin is connected to a resistor R36, and the resistors R39, R38, R37, and R36 are connected to the power output circuit.

2. The power supply voltage boost circuit according to claim 1, characterized in that: The power output circuit is composed of a resistor R32, a resistor r33, and a resistor r34 to form a voltage feedback. The resistors r33 and r34 are connected in series, and the connection point between the resistors r32 and r33 is connected to the FB of the second DC / DC boost chip U30.

3. The power supply voltage boost circuit according to claim 2, characterized in that: The output end of the first-stage boost circuit is connected in series with R23 and R24, and the FB of the first DC / DC boost chip U20 is connected to the connection point between R23 and R24.