CN209267160U - A kind of integrated form power supply input protection circuit - Google Patents
A kind of integrated form power supply input protection circuit Download PDFInfo
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- CN209267160U CN209267160U CN201920011164.2U CN201920011164U CN209267160U CN 209267160 U CN209267160 U CN 209267160U CN 201920011164 U CN201920011164 U CN 201920011164U CN 209267160 U CN209267160 U CN 209267160U
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- filter capacitor
- input
- piezoresistance
- protection
- resistance
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Abstract
The utility model relates to a kind of integrated form power supply input protection circuits, including input filter capacitor C1, input filter capacitor C2, input filter capacitor C3, input filter capacitor C4, output filter capacitor C5, voltage increase rate to configure capacitor C6, cross piezoresistance R1, cross piezoresistance R2, cross piezoresistance R3, pattern configurations resistance R4, under-voltage resistance R5, cross stream configuration resistance R6, input protection integrated chip U1, status indicator LED lamp D1, transient voltage suppressor D2.Beneficial effect is: constituting power input by using the circuit that integrated chip, capacitor, resistance, LED light and diode integrate and protects circuit; the functions such as overcurrent protection, short-circuit protection, overvoltage protection, surging prevention are provided; the threshold value of trigger protection is adjustable, and wide adaptability is reliable and stable.The quality for improving input power, further increases the quality of out-put supply.
Description
Technical field
The utility model belongs to power input protection field more particularly to a kind of integrated form power supply input protection circuit.
Background technique
It is general in currently used electronic system all to there is power input to protect circuit, it is not damaged with the system for protecting rear class
It is bad.Power input protection circuit generally comprises reverse connecting protection, overcurrent protection, short-circuit protection, overvoltage protection etc..Reverse connecting protection is common
Mode have: the input terminal series diode of power supply or mos pipe etc. realize it is anti-reverse；The common mode of overcurrent protection has:
Overcurrent protection is realized in the input terminal concatenation self-recovery fuse etc. of power supply；The common mode of short-circuit protection has: in the defeated of power supply
Enter end concatenation Fuse Type fuse etc. and realizes short-circuit protection；The common mode of overvoltage protection has: constituted with comparator and metal-oxide-semiconductor or
Person constitutes overvoltage crowbar by dedicated overvoltage protection chip；
There are many disadvantages for above power input protected mode, for example loss is big when input current is larger, fever is tight
Weight；It protects and needs replacing element after circuit operation and could work normally and the not high drawback of circuit complexity reliability.This is practical
Integrated form power supply input protection circuit in novel is made of an integrated chip and a little resistor-capacitor unit, and circuit is simple and reliable,
The functions such as reverse connecting protection, overcurrent protection, short-circuit protection, overvoltage protection are provided simultaneously.
Utility model content
In order to overcome the above-mentioned deficiencies of the prior art, the utility model provides a kind of integrated form power supply input protection circuit,
Realize the integrated form power supply input protection circuit of the functions such as overcurrent protection, short-circuit protection, overvoltage protection.
The utility model solve above-mentioned technical problem the technical solution adopted is that: provide a kind of integrated form power input
Protect circuit, including input filter capacitor C1, input filter capacitor C2, input filter capacitor C3, input filter capacitor C4, output
Filter capacitor C5, voltage increase rate configuration capacitor C6, piezoresistance R1 is crossed, piezoresistance R2 is crossed, crosses piezoresistance R3, pattern configurations electricity
R4, under-voltage resistance R5 are hindered, stream configuration resistance R6 is crossed, inputs and integrated chip U1, status indicator LED lamp D1, transient electrical is protected to constrain
Diode D2 processed；
The input filter capacitor C1, the input filter capacitor C2, the input filter capacitor C3, the input filter
Piezoresistance R1, the input protection integrated chip U1, the output filter capacitor C5, the wink are crossed with described after capacitor C4 is in parallel
Time variant voltage inhibits diode D2 successively in parallel, other end ground connection；
Described one end piezoresistance R2 of crossing is via the status indicator LED lamp D1 and input protection integrated chip U1 phase
Company, the other end are in parallel with the piezoresistance R1 excessively；
It is described cross piezoresistance R1, it is described cross after piezoresistance R3, under-voltage resistance R5 series connection with the pattern configurations resistance
R4, input protection integrated chip U1 are successively in parallel, other end ground connection；
The stream configuration resistance R6 that crosses is in parallel with the output filter capacitor C5, described to cross stream configuration resistance R6 and the electricity
The other end of pressure climbing speed configuration capacitor C6 is connected with input protection integrated chip U1；
The output filter capacitor C5 is in parallel with the transient voltage suppressor D2, other end ground connection.
Further, the input protection integrated chip U1 uses TPS26600 chip.
Further, the transient voltage suppressor D2 is malfunction indicator lamp, malfunction indicator lamp after trigger protection
It lights.
The beneficial effects of the utility model are: integrated by using integrated chip, capacitor, resistance, LED light and diode
Circuit constitute power input protect circuit, reverse connecting protection, overcurrent protection, short-circuit protection, overvoltage protection, surging prevention are provided
Etc. functions, the threshold value of trigger protection is adjustable, and wide adaptability is reliable and stable.The quality for improving input power, further increases output
The quality of power supply.
Detailed description of the invention
Fig. 1 is integrated form power supply input protection circuit figure.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, elaborates to the utility model embodiment.
As shown in Figure 1, the utility model provides a kind of integrated form power supply input protection circuit, including input filter capacitor
C1, input filter capacitor C2, input filter capacitor C3, input filter capacitor C4, output filter capacitor C5, voltage increase rate are matched
Capacitor C6 is set, piezoresistance R1 is crossed, crosses piezoresistance R2, cross piezoresistance R3, pattern configurations resistance R4, under-voltage resistance R5, cross stream configuration
Resistance R6, input protection integrated chip U1, status indicator LED lamp D1, transient voltage suppressor D2；The input filter electricity
Hold C1, the input filter capacitor C2, the input filter capacitor C3, the input filter capacitor C4 it is in parallel after with the over-voltage
Resistance R1, input protection integrated chip U1, the output filter capacitor C5, the transient voltage suppressor D2 are successively
Parallel connection, other end ground connection；Described one end piezoresistance R2 of crossing is via the status indicator LED lamp D1 and the integrated core of input protection
Piece U1 is connected, and the other end is in parallel with the piezoresistance R1 excessively；The piezoresistance R1 excessively, the piezoresistance R3, the under-voltage electricity excessively
Hinder successively in parallel with the pattern configurations resistance R4, input protection integrated chip U1 after R5 connects, other end ground connection；It is described
It is in parallel with the output filter capacitor C5 to cross stream configuration resistance R6, the stream configuration resistance R6 that crosses matches with the voltage increase rate
The other end for setting capacitor C6 is connected with input protection integrated chip U1；The output filter capacitor C5 and the transient voltage
Inhibit diode D2 in parallel, other end ground connection.
Preferably, the input protection integrated chip U1 uses TPS26600 chip.
Preferably, the transient voltage suppressor D2 is malfunction indicator lamp, and malfunction indicator lamp is bright after trigger protection
It rises.
Specifically, wherein overcurrent protection is configured by the stream configuration resistance R6 that crosses, as follows:
I (ol)=12/ (R6/1000)
Wherein overvoltage protection is matched by the piezoresistance R1 excessively, piezoresistance R3, the under-voltage resistance R5 excessively
It sets, as follows:
V (ov)=1.19/ (R5/ (R1+R3+R5))
Wherein under-voltage protection is matched by the piezoresistance R1 excessively, piezoresistance R3, the under-voltage resistance R5 excessively
It sets, as follows:
V (uv)=1.19/ ((R3+R5)/(R1+R3+R5))
Stream mode and short-circuit mode are wherein crossed, is configured by the pattern configurations resistance R4, when R4=0R, overcurrent mould
Electric current is exported when formula remains threshold value set by overcurrent protection；Stop output when short-circuit mode until short circuit releases.
Wherein surging prevention is realized that the transient voltage inhibits by the transient voltage suppressor D2
Diode D2 is malfunction indicator lamp, and after trigger protection, malfunction indicator lamp is lighted.
Pass through the input filter capacitor C1, the input filter capacitor C2, the input filter capacitor C3, the input
Filter capacitor C4 is filtered input power, improves the quality of input power.By the output filter capacitor C5 to output
Power supply is filtered, and further increases the quality of out-put supply.
Above specific embodiment of the present utility model does not constitute the restriction to scope of protection of the utility model.It is any
According to any other various changes and modifications made by the utility model technical concept, the utility model power should be included in
In the protection scope that benefit requires.
Claims (3)
1. a kind of integrated form power supply input protection circuit, it is characterised in that: including input filter capacitor C1, input filter capacitor
C2, input filter capacitor C3, input filter capacitor C4, output filter capacitor C5, voltage increase rate configuration capacitor C6, piezoelectricity is crossed
R1 is hindered, piezoresistance R2 is crossed, crosses piezoresistance R3, pattern configurations resistance R4, under-voltage resistance R5, crosses stream configuration resistance R6, input protection
Integrated chip U1, status indicator LED lamp D1, transient voltage suppressor D2；
The input filter capacitor C1, the input filter capacitor C2, the input filter capacitor C3, the input filter capacitor
Piezoresistance R1, the input protection integrated chip U1, the output filter capacitor C5, the transient electrical are crossed with described after C4 is in parallel
It is successively in parallel to constrain diode D2 processed, other end ground connection；
Described one end piezoresistance R2 excessively is connected via the status indicator LED lamp D1 with input protection integrated chip U1, separately
One end is in parallel with the piezoresistance R1 excessively；
It is described cross piezoresistance R1, it is described cross after piezoresistance R3, under-voltage resistance R5 series connection with the pattern configurations resistance R4, institute
It is successively in parallel to state input protection integrated chip U1, other end ground connection；
The stream configuration resistance R6 that crosses is in parallel with the output filter capacitor C5, described to cross on stream configuration resistance R6 and the voltage
The other end for rising rate configuration capacitor C6 is connected with input protection integrated chip U1；
The output filter capacitor C5 is in parallel with the transient voltage suppressor D2, other end ground connection.
2. a kind of integrated form power supply input protection circuit according to claim 1, it is characterised in that: the input protection collection
TPS26600 chip is used at chip U1.
3. a kind of integrated form power supply input protection circuit according to claim 1, it is characterised in that: the transient electrical is constrained
Diode D2 processed is malfunction indicator lamp, and malfunction indicator lamp lights after trigger protection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920011164.2U CN209267160U (en) | 2019-01-04 | 2019-01-04 | A kind of integrated form power supply input protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920011164.2U CN209267160U (en) | 2019-01-04 | 2019-01-04 | A kind of integrated form power supply input protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209267160U true CN209267160U (en) | 2019-08-16 |
Family
ID=67584192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920011164.2U Active CN209267160U (en) | 2019-01-04 | 2019-01-04 | A kind of integrated form power supply input protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209267160U (en) |
-
2019
- 2019-01-04 CN CN201920011164.2U patent/CN209267160U/en active Active
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