CN213151897U

CN213151897U - Party type switching power supply

Info

Publication number: CN213151897U
Application number: CN202022378170.7U
Authority: CN
Inventors: 陈燕飞
Original assignee: Foshan Shunde Shengjie Electronic Technology Co ltd
Current assignee: Foshan Shunde Shengjie Electronic Technology Co ltd
Priority date: 2020-10-22
Filing date: 2020-10-22
Publication date: 2021-05-07
Anticipated expiration: 2030-10-22

Abstract

The utility model discloses a party type switching power supply, including the shell body to and top-down corresponds installs at inside PCB board and the power strip of shell body, be provided with PSR power switch integrated module between PCB board and the power strip, PCB inboard package rubbing board body to and correspond thermistor, power chip, transformer, chip resistor and the switch control module of installing on the plate body from a left side to the right side, switch control module's internal integration has constant voltage constant current integrated circuit, constant voltage constant current integrated circuit establishes ties on switch control module, constant voltage constant current integrated circuit is connected with PSR power switch integrated module electricity. The utility model discloses a set up a series of structures, improved production installation effectiveness and reduction in production cost greatly, do EMC in development design earlier stage, EMI appears disturbing the surplus not enough during the FCC test, has carried out the change circuit board to this problem and has walked line and electric capacity components and parts parameter adjustment and reach the interference shielding effect.

Description

Party type switching power supply

Technical Field

The utility model relates to a power strip production and processing technology field specifically is a kind of party type switching power supply.

Background

A switch mode power supply, also called a switching power supply or a switching converter, is a high frequency power conversion device, which is a kind of power supply. The function is to convert a level voltage into a voltage or current required by a user terminal through different types of architectures, the input of the switching power supply is mostly an alternating current power supply (such as commercial power) or a direct current power supply, the output of the switching power supply is mostly equipment requiring a direct current power supply, such as a personal computer, the switching power supply performs voltage and current conversion between the two, the switching power supply needs to perform anti-radiation processing during production and processing, the existing switching power supply has EMC, EMI and FCC certification that a filter X2 capacitor, a common mode inductor and a common mode coil are added at an input port to achieve a shielding effect, although the conventional scheme can achieve an interference shielding effect, the production and installation efficiency is low, the labor cost and the cost are high, and secondly, a power chip is unreasonable in design and does not have the functions of automatic recovery and high-low voltage compensation, so that the prior art needs to be improved, to solve the above problems.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

An object of the utility model is to provide a party type switching power supply to solve the problem that proposes among the above-mentioned background art.

(II) technical scheme

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a party type switching power supply, includes the shell body to and top-down corresponds installs at inside PCB board and the power strip of shell body, be provided with PSR power switch integrated module between PCB board and the power strip, including the plate body in the PCB board to and correspond thermistor, power chip, transformer, chip resistor and the switch control module of installing on the plate body from a left side to the right side, switch control module's internal integration has constant voltage constant current integrated circuit, constant voltage constant current integrated circuit establishes ties on switch control module, constant voltage constant current integrated circuit is connected with PSR power switch integrated module electricity.

Preferably, the periphery of the PCB is provided with four limiting bulges, and the four limiting bulges are all fixed inside the outer shell.

Preferably, a power socket is arranged outside the outer shell and connected with the PCB in series.

Preferably, a current conversion module is connected in series to an input circuit of the PCB.

Preferably, the model of the power chip is LN1F24, and the transformer is EER 20.

Preferably, the plastic-sealed fuse tube and the common-mode inductor are correspondingly mounted on the left part of the plate body up and down.

Preferably, the lower extreme of shell body is fixed with the supporting pad, and the supporting pad is provided with four, four the supporting pad corresponds installs the four corners department at the shell body lower extreme.

Preferably, the lower extreme of shell body is provided with the closing plate, and the buckle is installed to the one end of closing plate, the buckle lock is on the shell body.

(III) advantageous effects

Compared with the prior art, the beneficial effects of the utility model are that: the switch power supply is high in performance, production and installation efficiency is greatly improved, production cost is reduced, EMC and EMI are done in the early stage of development and design, interference allowance is insufficient during FCC testing, circuit board wiring and capacitance component parameter adjustment are changed to achieve interference shielding effect aiming at the problem, switch power supply product updating reform is conducted, the time of worker installation is reduced in the near step, low-efficiency and high-cost operation is improved, meanwhile, the certification requirement and the universality of a board are improved, strong current input part and atomization control part wiring are strict in requirement, key component parameter requirement selection is precise, a local switch power supply circuit shields and absorbs electric radiation interference, electric radiation damage to a human body is reduced, production efficiency is improved, research and development design is conducted, a switch power supply main driving part adopts a novel high-performance primary side constant-voltage constant-current power supply switch integrated circuit driving mode (which is a new generation high-performance flyback power supply integrated circuit driving mode) (a new generation high-performance flyback, The high-integration current mode allows the switching frequency of a chip to be designed by using a relatively small transformer size, and meanwhile, the system can work in a near critical conduction mode by virtue of extremely small dead time control, so that the utilization rate of the transformer is improved, the high-integration current mode is far superior to the traditional PSR controller framework, the working mode with PWM/PFM/PBM mode multi-section curve control can further optimize the conversion efficiency of the system under different loads, particularly the conversion efficiency under a light load, the peak current threshold value is automatically locked under an extremely light load condition so as to keep efficient conversion, the segmented modulation mode design enables the system to have high conversion efficiency, meanwhile, audible audio noise of human ears is effectively avoided, and the standby power consumption is reduced to below 50 mW.

Drawings

FIG. 1 is an overall front view of the present invention;

FIG. 2 is a schematic structural view of a PCB board according to the present invention;

fig. 3 is a bottom view of the outer shell of the present invention.

The reference numbers in the figures are: 1. an outer housing; 2. a power panel; 3. a PSR power switch integrated module; 4. a PCB board; 5. a power socket; 6. a limiting bulge; 7. a current conversion module; 8. a common mode inductor; 9. a plate body; 10. plastic packaging of the fuse tube; 11. a thermistor; 12. a power supply chip; 13. a transformer; 14. a chip resistor; 15. a power switch control module; 16. a constant voltage and constant current integrated circuit; 17. a sealing plate; 18. a support pad; 19. and (5) buckling.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides an embodiment: a kind of party type switching power supply, including the outer casing 1, and PCB board 4 and power board 2 that is installed inside the outer casing 1 correspondingly from top to bottom, the power board 2 is used for storing the electric quantity, there is PSR power switch integrated module 3 between power board 2 and PCB board 4, PSR power switch integrated module 3 can construct the low standby power consumption, high conversion efficiency, high-performance PSR primary side CC/CV switching power supply solution that meets the energy efficiency standards such as CoCV5 and DoELEVALVELVI conveniently in the application up to 20W, include the board 9 in the PCB board 4, and correspond to thermistor 11 installed on board 9 from left to right, power chip 12, transformer 13, chip resistance 14 and power switch control module 15, the power chip 12 is built-in and has high-accuracy constant current constant voltage control and optimized valley bottom switching technology, can provide the output current error better than the precision of + -3% and the output voltage error of the precision of + -2% in the whole range, the power switch control module 15 is internally integrated with a constant-voltage constant-current integrated circuit 16, the constant-voltage constant-current integrated circuit 16 is connected in series on the power switch control module 15, the constant-voltage constant-current integrated circuit 16 is electrically connected with the PSR power switch integrated module 3, and the constant-voltage constant-current integrated circuit 16 is a new generation of high-performance and high-integration-level current mode.

Further, the periphery of the PCB 4 is provided with four limiting protrusions 6, and the four limiting protrusions 6 are fixed inside the outer shell 1 and can limit the installation of the PCB 4.

Further, a power socket 5 is arranged outside the outer shell 1, and the power socket 5 is connected with the PCB 4 in series, so that the supply of power supply can be realized.

Further, a current conversion module 7 is connected in series to an input circuit of the PCB 4 to realize the conversion of the current mode.

Further, the model number of the power chip 12 is LN1F24, the transformer 13 is EER20, the switching frequency of the power chip 12 up to 70kHz allows the design to be completed using a relatively small size of the transformer 13, and the extremely small dead time control allows the system to operate in a near critical conduction mode, thereby improving the utilization rate of the transformer 13, which is far superior to the traditional PSR controller architecture.

Furthermore, the plastic-sealed fuse tube 10 and the common-mode inductor 8 are correspondingly mounted on the left part of the plate body 9 up and down.

Further, the lower extreme of shell body 1 is fixed with supporting pad 18, and supporting pad 18 is provided with four, and four supporting pads 18 correspond and install the four corners department at shell body 1 lower extreme, play the effect of support.

Further, the lower extreme of shell body 1 is provided with sealing plate 17, and buckle 19 is installed to the one end of sealing plate 17, and buckle 19 lock is on shell body 1, the easy access.

The working principle is as follows: the utility model achieves the interference shielding effect by changing the wiring of the circuit board and the parameter adjustment of the capacitance component, the utility model preferably installs the power chip 12 in the PCB 4, the power chip 12 is LN1F24, provides a perfect protection circuit with the automatic recovery function, including the cycle-by-cycle current limit (OCP), the output over-current protection (OCP) with the high-low voltage compensation function, the VDD over-voltage protection and the under-voltage locking function, and is also convenient for the installation and the use of the transformer 13, when in operation, the power voltage flows through the PCB 4 by the way of the power socket 5 and the current conversion module 7, at this moment, the power chip 12 is processed, the arrangement of the chip resistor 14 and the thermistor 11 can enhance the safety of the circuit, the circuit is converted into a reasonable type, the power switch control module 15 and the constant voltage constant current integrated circuit 16 can control the voltage of the power board 2 not to be supplied, the power switch control module 15 is a new generation of high-performance and high-integration current mode, and then flows through the PSR power switch integrated module 3, the PSR power switch integrated module 3 can conveniently construct low standby power consumption and high conversion efficiency meeting energy efficiency standards such as CoCV5 and DoELEVELVI in applications up to 20W, the chip is internally provided with high-precision constant current and constant voltage control, and has an optimized valley switching technology, so that the radiation resistance effect of the whole device can be optimized.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a party's type switching power supply, includes shell body (1) to and top-down corresponds installs PCB board (4) and power strip (2) inside shell body (1), its characterized in that: be provided with PSR power switch integrated module (3) between PCB board (4) and power strip (2), including plate body (9) in PCB board (4) to and correspond thermistor (11), power chip (12), transformer (13), chip resistor (14) and switch control module (15) of installing on plate body (9) from a left side to the right side, the internal integration of switch control module (15) has constant voltage constant current integrated circuit (16), constant voltage constant current integrated circuit (16) establish ties on switch control module (15), constant voltage constant current integrated circuit (16) are connected with PSR power switch integrated module (3) electricity.

2. A pi-type switching power supply according to claim 1, wherein: the periphery of the PCB (4) is provided with four limiting bulges (6), and the four limiting bulges (6) are all fixed inside the outer shell (1).

3. A pi-type switching power supply according to claim 1, wherein: the outer part of the outer shell (1) is provided with a power socket (5), and the power socket (5) is connected with the PCB (4) in series.

4. A pi-type switching power supply according to claim 1, wherein: and a current conversion module (7) is connected in series on an input circuit of the PCB (4).

5. A pi-type switching power supply according to claim 1, wherein: the model of the power supply chip (12) is LN1F24, and the transformer (13) is EER 20.

6. A pi-type switching power supply according to claim 1, wherein: the plastic package protective tube (10) and the common mode inductor (8) are correspondingly installed on the left portion of the plate body (9) up and down.

7. A pi-type switching power supply according to claim 1, wherein: the lower extreme of shell body (1) is fixed with supporting pad (18), and supporting pad (18) are provided with four, four supporting pad (18) correspond and install four corners department at shell body (1) lower extreme.

8. A pi-type switching power supply according to claim 1, wherein: the lower extreme of shell body (1) is provided with closing plate (17), and buckle (19) are installed to the one end of closing plate (17), buckle (19) lock is on shell body (1).