A step-down converter circuit with adjustable voltage

A technology of step-down conversion and voltage, which is applied in the direction of conversion equipment without intermediate conversion to AC, which can solve the problems of inability to accurately achieve the specified target, inconvenient development work, and non-fine-tuning, etc., to achieve wide practicability, facilitate development and adjustment, and avoid The effect of work

Active Publication Date: 2017-05-03
CHENGDU SHENGJUN ELECTRONICS EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since the device parameters of the current step-down conversion circuit are fixed, a step-down conversion circuit can only step down to a fixed target value. However, in the process of development and debugging, it is often necessary to replace chips with different operating voltages. The current step-down conversion circuit The circuit will no longer be practical and needs to be redesigned, which will bring inconvenience to the development work. At the same time, because the device parameters in the step-down conversion circuit are all fixed values, it is often impossible to accurately achieve the specified target and cannot be fine-tuned. pressure state or overvoltage state

Method used

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  • A step-down converter circuit with adjustable voltage

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Embodiment 1

[0016] Embodiment one, figure 1 A step-down conversion circuit diagram for realizing voltage adjustment provided by this embodiment is shown. The voltage-adjustable step-down conversion circuit is characterized in that it includes: a step-down conversion chip, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, and a capacitor C5, Capacitor C6, inductor L1, polarized capacitor PC1, polarized capacitor PC2, polarized capacitor PC3 and a resistance adjustment unit; the EN end of the step-down conversion chip is connected to the first end of the resistor R1, and the second end of the resistor R1 is connected to the DC voltage source VCC, the VFB end of the step-down conversion chip is connected to the first end of the resistor R2 and the first end of the resistor R3, the second end of the resistor R3 is grounded, the VREG end of the step-down conversion chip is connected to the first end of the capacitor C1, ...

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PUM

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Abstract

The invention relates to the field of development of circuit boards and discloses a voltage reduction conversion circuit achieving adjustable voltage. According to the voltage reduction conversion circuit achieving adjustable voltage, by adjusting an adjustable resistor RX1 of a resistor-adjustable unit, the output voltage of a voltage reduction conversion chip is changed, and therefore stable output of different target voltages can be achieved, the voltage reduction conversion circuit achieving the adjustable voltage has higher practicability, development and debugging of a circuit board are facilitated, fine adjustment of output voltage can also be achieved, and it is avoided that the chip works under an overvoltage state or an undervoltage state.

Description

technical field [0001] The invention relates to the field of circuit board development, in particular to a voltage-adjustable step-down conversion circuit. Background technique [0002] A circuit board, also known as a printed circuit board, is an integrated board that combines multiple chips or devices to achieve target functions. There are many different types of chips involved on the circuit board, and their power supply voltages may be different, but for the interface of the circuit board, there is only one commonly used input voltage source (such as an external 5V or 12V voltage source), in order to make each chip work normally. To work, it is necessary to design a step-down conversion circuit to realize local step-down to drive the chip to work normally. For example, the working voltage of the FPGA (Field-Programmable Gate Array, Field Programmable Gate Array) chip is 3.3V, and a step-down conversion circuit is required to reduce the external 5V voltage to 3.3V to dri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/10
CPCH02M3/10
Inventor 肖燕刘迪俊
Owner CHENGDU SHENGJUN ELECTRONICS EQUIP
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