Application of electronic potentiometer module in direct current stabilized voltage power supply

A technology of DC regulated power supply and electronic potentiometer, which is applied in the network using active components, conversion equipment without intermediate conversion to AC, electrical components, etc., can solve the problem of large and adjustable DC regulated power supply withstanding voltage Difficult to overcome, easy to damage, etc.

CN101873120AInactive Publication Date: 2010-10-27武汉源和翔科技有限公司
0 Cites 8 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2010-10-27
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

An adjustable direct current stabilized voltage power supply mainly consists of several components: 1, a three-terminal integrated voltage stabilizer output by a fixed voltage; 2, a three-terminal integrated voltage stabilizer output by adjustable voltages; 3, an adjustable switching power supply module; 4, an adjustable low dropout linear power supply module; and 5, a high power transistor and an MOS (Metal Oxide Semiconductor) power transistor. The adjustable direct current stabilized voltage power supply is characterized by having the high voltage output and the dual-path isolated voltage output, and the output voltages are mostly adjusted by mechanical potentiometers. The electronic potentiometer module is a novel electronic potentiometer device and has strong use functions, performance extension abilities, integrated independence and output passivity, three output modes of adjustable resistance output mode, potentiometer output mode and voltage output mode, a positive regulation mode and a negative regulation mode. The unique characteristics and functions enable that the electronic potentiometer module can be applied together with direct interfaces of all adjustable direct current stabilized voltage power supplies, replace the mechanical potentiometer and realize high precision adjustment of output voltages.
Need to check novelty before this filing date? Find Prior Art

Description

Technical field

[0001] The universal electronic potentiometer module is a completely new concept and complete potentiometer device composed of electronic components. It has all the characteristics of the traditional mechanical potentiometer and a large number of extended functions that are impossible for the mechanical potentiometer. It is directly applied to the adjustable direct current stabilized power supply for precise adjustment of the output voltage, and this technology belongs to the application field of electronic components. Background technique

[0002] The adjustable DC regulated power supply is a power supply with the highest technical indicators and a large amount of use among the various DC regulated power supplies today. However, except for the expensive program-controlled power supply, ordinary adjustable DC regulated power supplies use multiple One-turn mechanical potentiometers are used for output voltage adjustment, or two mechanical potentiometers are us...

Examples

Embodiment Construction

[0019] image 3 In the above, because the electronic potentiometer module output network resistors are all connected in parallel, the number of connections increases and the output resistance decreases. According to the working principle of TL431, the voltage between pin Vref and A is constant. When the resistance on it decreases , the output voltage rises, and the output voltage is determined by the following formula:

[0020] Vk=2.5XR1 / Rx

[0021] In the formula, R1 is the resistance between Vk and Vref, and Rx is the resistance between Vref and A.

[0022] Figure 4 Among them, the output voltage of the switching power supply module L4970A is determined by the following formula:

[0023] Vout=(1+W / R1)X5.1V

[0024] In the formula, W is the adjustable resistance output by the electronic potentiometer module, and the selection of each voltage dividing resistor should ensure that the output voltage of the switching power supply module L4970A varies between 5.1V and 30V.

...