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ADC and PWM closed-loop control-based adjustable power supply circuit and power supply equipment

A technology of closed-loop control and power circuit, which is applied in the direction of control/regulation system, regulation of electric variables, electrical components, etc., and can solve problems such as inconvenient movement and portability, instability, and large overall volume

Pending Publication Date: 2020-12-29
深圳市微特精密科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to meet various usage occasions, the voltage of most existing power supply equipment is adjustable, which can provide the required voltage according to the specific situation. However, the adjustable power supply circuit of the existing power supply equipment not only has many It is bulky, not easy to move and carry, and the voltage value provided has a large deviation and is unstable, so it cannot be used in occasions that have high requirements for power supply voltage

Method used

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  • ADC and PWM closed-loop control-based adjustable power supply circuit and power supply equipment
  • ADC and PWM closed-loop control-based adjustable power supply circuit and power supply equipment
  • ADC and PWM closed-loop control-based adjustable power supply circuit and power supply equipment

Examples

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Effect test

Embodiment 1

[0015] Example 1, such as Figure 1-3 As shown, an adjustable power supply circuit based on ADC and PWM closed-loop control includes MCU, MOS transistor Q1, resistor R1, filter B1, power supply Vdd, and circuit output terminal Vout, and the MCU includes PWM output pins and ADC input pins The filter B1 includes a filter input terminal B11 and a filter output terminal B12. The PWM output pin of the MCU is electrically connected to the gate of the MOS transistor Q1, and the resistor R1 is connected in series between the PWM output pin and the gate of the MOS transistor Q1. The source of the MOS transistor Q1 is electrically connected to the power supply Vdd, the drain of the MOS transistor Q1 is electrically connected to the filter input terminal B11 of the filter B1, and the circuit output terminal Vout, and the filter output terminal B12 of the filter B1 is connected to the ADC input pin of the MCU Electrical connection; when the PWM output pin of the MCU in the present embodim...

Embodiment 2

[0018] Example 2, such as Figure 1-3 As shown, a power supply device, including the adjustable power supply circuit based on ADC and PWM closed-loop control in Embodiment 1, is small in size, easy to move and carry, simple in circuit structure, simple and convenient in maintenance, has good economic benefits, and can Provide accurate and stable voltage, which can be used in occasions with high requirements on power supply voltage.

[0019] working principle:

[0020] First, pre-configure the PWM frequency, PWM resolution, ADC resolution, etc. of the MCU, then read the voltage setting value Vth, which is the required output voltage, turn on the PWM and ADC, and then read the sampled value of the ADC input pin DC component voltage V, compare the sampled DC component voltage V with the voltage setting value Vth, if the sampled DC component voltage V is greater than the voltage setting value Vth, then lower the PWM duty cycle P, if the sampled DC component If the voltage V is l...

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Abstract

The invention relates to the technical field of power supply circuits, in particular to an ADC and PWM closed-loop control-based adjustable power supply circuit and power supply equipment, the ADC andPWM closed-loop control-based adjustable power supply circuit comprises an MCU, an MOS Q1, a resistor R1, a filter B1, a power supply Vdd and a circuit output end Vout, the MCU comprises a PWM outputpin and an ADC input pin, and the filter B1 comprises a filter input end B11 and a filter output end B12. A PWM output pin of the MCU is electrically connected with a grid electrode of the MOS Q1, the resistor R1 is connected between the PWM output pin and the grid electrode of the MOS Q1 in series, a source electrode of the MOS Q1 is electrically connected with the power supply Vdd, a drain electrode of the MOS Q1 is electrically connected with a filtering input end B11 of the filter B1 and a circuit output end Vout, and a filtering output end B12 of the filter B1 is electrically connected with the ADC input pin of the MCU. According to the invention, the overall circuit structure is simple, the number of overall used devices is small, the overall size is small, accurate and stable voltage can be provided, and the circuit can be suitable for use occasions with high requirements for power supply voltage.

Description

Technical field: [0001] The invention relates to the technical field of power circuits, in particular to an adjustable power circuit based on ADC and PWM closed-loop control and power equipment. Background technique: [0002] In the process of rapid development of contemporary technology and economy, power supply plays a key role. All electronic equipment needs a good and stable power supply. At the same time, various electrical equipment have different performance requirements for power supply. Therefore, there are various power supply forms, such as DC power supply with adjustable voltage amplitude, or It is an AC power supply with dynamically adjustable voltage amplitude and frequency. Good and stable power supply control technology plays a very important role in today's power electronics technology. Power supply has become a very important basic technology and industry, and is widely used in various industries. From daily life to cutting-edge science, power control tech...

Claims

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Application Information

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IPC IPC(8): H02M3/157
CPCH02M3/157
Inventor 陈启恩
Owner 深圳市微特精密科技股份有限公司
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