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Isolated power supply circuit with micro-power, wide voltage, high efficiency and multi-output

A multi-channel output and isolated power supply technology, applied in the direction of converting DC power input to DC power output, output power conversion devices, electrical components, etc., can solve the problems of increasing the size and cost of transformers, and achieve high conversion efficiency.

Inactive Publication Date: 2016-12-14
JIANGSU WEIYI ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this extra transformer winding increases the size and cost of the transformer

Method used

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  • Isolated power supply circuit with micro-power, wide voltage, high efficiency and multi-output
  • Isolated power supply circuit with micro-power, wide voltage, high efficiency and multi-output
  • Isolated power supply circuit with micro-power, wide voltage, high efficiency and multi-output

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Embodiment 1

[0014] Embodiment 1: Micro power consumption wide voltage high efficiency multiple output isolated power supply circuit, including capacitor C1, capacitor C2, capacitor C3, capacitor C4, power chip U1, high frequency transformer T1, diode D1, diode D2, diode D3, DC After the power supply is filtered by the capacitor C1, it is connected to pins 2 and 5 of the power chip U1 and pin 1 of the high-frequency transformer T1, and connected to pin 1 of the power chip U1 through the resistor R1; pin 2 of the high-frequency transformer T1 is connected to the pin of the power chip U1 4 pins, and connected to one end of the resistor R2; the other end of the resistor R2 is connected to the 3 pins of the power chip U1; the 4 pins of the high frequency transformer T1 are connected to the positive pole of the diode D1, and the negative pole of the diode D1 is filtered by the capacitor C2 to output the power supply voltage VCC3 ; Pin 5 of the high-frequency transformer T1 is connected to the po...

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PUM

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Abstract

The invention discloses an isolated power supply circuit with micro-power, wide voltage, high efficiency and multi-output. A DC power supply after being filtered by a capacitor C1 is connected to pins 2 and 5 of a power supply chip U1 and the pin 1 of a high-frequency transformer T1 and is connected to the pin 1 of the power supply chip U1 through a resistor R1; the pin 2 of the high-frequency transformer T1 is connected with the pin 4 of the power supply chip U1 and is connected with one end of a resistor R2; the other end of the resistor R2 is connected with the pin 3 of the power supply chip U1; the pin 4 of the high-frequency transformer T1 is connected with the positive electrode of a diode D1; the negative electrode of the diode D1 is after being filtered by a capacitor C2 outputs a power voltage VCC3; the pin 5 of the high-frequency transformer is connected with the positive electrode of a diode D2, and the negative electrode of the diode D2 after being filtered by a capacitor C3 outputs a power voltage VCC2; and the pin 7 of the high-frequency transformer is connected with the positive electrode of a diode D3, the negative electrode of the diode D3 after being filtered by a capacitor C4 outputs a power voltage VCC1, and the power voltages are isolated from one another.

Description

technical field [0001] The invention relates to the field of isolated power supplies. Background technique [0002] Due to the complexity of the industrial on-site power supply system, large voltage fluctuations, and poor reliability, various interferences (celestial body discharge interference, corona spark discharge interference, electrical equipment frequency interference, induction interference, etc.) Common impedance coupling, leakage current coupling, etc.) enter the measurement system through the power supply system, causing the measurement results to deviate from the accurate value. Therefore, higher requirements are put forward for the power supply system of the vortex flowmeter. Factors such as conversion efficiency cannot meet the actual needs. In recent years, isolated power supplies have been widely used in field instruments due to their strong anti-interference ability. Traditionally, the output voltage detection of isolated power supplies usually requires an o...

Claims

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Application Information

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IPC IPC(8): H02M3/335
CPCH02M3/33523
Inventor 唐贤昭唐江飞
Owner JIANGSU WEIYI ELECTRONICS
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