Voltage reduction type switching power supply with super-wide input voltage and adjustable output voltage
A technology of input voltage and output voltage, which is applied in the field of power supply, can solve problems such as damage to electronic equipment, large fluctuations in power supply, damage to power supply of electronic equipment, etc., and achieve the effect of easy operation, small size and reduced impact
Inactive Publication Date: 2017-05-24
ZHENGZHOU XINGONG INTELLIGENT SYST CO LTD
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Problems solved by technology
In this transformation process, several electronic devices are needed. In the factory, especially in some strong electromagnetic and high current environments with large motors, the power supply of the whole factory will fluctuate greatly, which will seriously cause serious damage to the electronic devices directly powered by the factory power supply. impact, even large voltage pulses can cause damage to the power supply of the electronic device, which in turn leads to damage to the entire electronic device
Method used
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[0038] Example: see figure 1 , figure 2 , image 3 with Figure 4 .
[0039] Step-down switching power supply with ultra-wide input voltage and adjustable output voltage, including resistors, inductors, capacitors, triodes, diodes, Zener tubes and MOSFET switch tubes, which are connected and combined to form: directly act on MOSFET switch tubes, and Control the MOSFET switch tube to turn on and off the switch tube control circuit according to the feedback signal;
[0040] As a switch, a MOSFET switch tube that provides energy output for the subsequent stage;
[0041] An oscillating positive feedback circuit that can generate a positive feedback signal;
[0042] The energy is transferred to the energy storage filter circuit of the subsequent stage through charging and discharging;
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The invention discloses a voltage reduction type switching power supply with super-wide input voltage and adjustable output voltage. An MOSFET switching tube is connected with a switching tube control circuit, an oscillating feedback circuit and a power storage filtering circuit; the power storage filtering circuit is connected with an overcurrent feedback circuit; the overcurrent feedback circuit is connected with a power output positive pole and an overcurrent and overvoltage signal processing circuit; the overcurrent and overvoltage signal processing circuit is connected with the power output positive pole; an adjustable voltage feedback circuit is arranged between the overcurrent and overvoltage signal processing circuit and the power output positive pole; the overcurrent and overvoltage signal processing circuit is connected with a feedback signal driving circuit; the overcurrent and overvoltage signal processing circuit is connected with a positive pole of an external direct current power supply through an open circuit; and the positive pole of the external direct current power supply is connected with the switching tube control circuit and the MOSFET switching tube. The invention uses the design scheme of constructing the switching power supply by using separate elements and has the advantages of small volume, high conversion efficiency and super-wide input voltage range, and each element is packaged with a small packaging patch, thereby decreasing influences among the elements and facilitating operation.
Description
[0001] Technical field: [0002] The invention relates to the field of power supplies, in particular to a step-down switching power supply with ultra-wide input voltage and adjustable output voltage. [0003] Background technique: [0004] There are two main types of step-down power supplies on the market: linear regulated power supplies and step-down switching power supplies. [0005] For the linear regulated power supply, it is suitable for use in some occasions where the voltage difference between the input voltage and the output voltage is small, and for some occasions where the voltage difference between the input voltage and the output voltage is large, the efficiency of the linear power supply will become very low. Piezoelectric sources are no longer applicable. [0006] For switching power supplies, there are isolated and non-isolated. For non-isolated, it is generally difficult to achieve a wide voltage input range. For the isolated type, although it is relatively e...
Claims
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IPC IPC(8): H02M3/156
CPCH02M3/156
Inventor 王飞虎丁英强李希魁赵澎波武吉庆敖彬仪李宏伟杨东升秦利涛让家恒
Owner ZHENGZHOU XINGONG INTELLIGENT SYST CO LTD