CN209402490U - A kind of delay electrification circuit - Google Patents
A kind of delay electrification circuit Download PDFInfo
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- CN209402490U CN209402490U CN201821504554.5U CN201821504554U CN209402490U CN 209402490 U CN209402490 U CN 209402490U CN 201821504554 U CN201821504554 U CN 201821504554U CN 209402490 U CN209402490 U CN 209402490U
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- capacitor
- power supply
- supply chip
- triode
- circuit
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- 239000003990 capacitor Substances 0.000 claims abstract description 55
- 206010044565 Tremor Diseases 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
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Abstract
The utility model discloses a kind of delay electrification circuits, including power supply chip U1, triode Q1, capacitor C1, capacitor C2, one end of capacitor C1 and the input pin of power supply chip U1 are connect with power input, output end of the switched pins of power supply chip U1 as delay electrification circuit, the base stage of the other end connecting triode Q1 of capacitor C1, the collector of triode Q1 and one end of capacitor C2 are all connected with the enable end of power supply chip U1, and the ground terminal of the collector of triode Q1, the other end of capacitor C2 and power supply chip U1 is grounded.The utility model can eliminate the operation irregularity of the timing master of power supply shakiness and logical device, make circuit work under stable power environment, the reliability that circuit can be significantly improved increases the stability of product, reduces maintenance cost and Material Cost caused by device failure.
Description
Technical field
The utility model relates to power switch circuit more particularly to a kind of delay electrification circuits.
Background technique
In photovoltaic apparatus system, inverter can start to work after sun every morning, which rises, to be come, at this moment inverter
Output will appear unstable and fluctuation situation, when an external connection module needs take electricity from inverter, it may appear that power-on and power-off repeatedly
The case where, easily cause damage of product.
In order to solve this problem, need to increase a module delay electrification circuit, existing technical solution has following several
It is a:
1, as shown in Figure 1, adding switching tube with RC circuit to make power supply delay switch, this circuit operation principle is power input
When, the voltage on capacitor C1 is low, Q2 cut-off, and 1 foot of Q1 is height, and Q1 cut-off, VCC_out is without output, by resistance R1 to electricity
Hold C1 charging, it is high level that capacitor C1, which is full of, after a certain time, and Q2 conducting drags down 1 foot of Q1, Q1 conducting, and VCC_out is defeated
Out.This circuit has a defect that, capacitor of the power supply repeatedly after on-off on capacitor C1 can be increased slowly within a certain period of time, and Q2 is led
After logical, this circuit does not have delay function after power supply powers on repeatedly again.
2, as shown in Fig. 2, increasing RC electrification reset circuit on the main control chip of product, the working principle of this circuit is also
Charging by resistance to capacitor, main control chip is started to work after capacitor is full of.
Scheme 1 has similar defect with scheme 2, and the upper voltage of capacitor can be increased slowly, while the delay of this circuit
Time is shorter, generally there was only a few tens of milliseconds, is not able to satisfy circuit design requirements.
Utility model content
For overcome the deficiencies in the prior art, the purpose of this utility model is to provide a kind of delay electrification circuit, energy
Solve the problems, such as that prior art delay time is short.
The purpose of this utility model is implemented with the following technical solutions:
A kind of delay electrification circuit, including power supply chip U1, triode Q1, capacitor C1, capacitor C2, one end of capacitor C1 and
The input pin of power supply chip U1 is connect with power input, and the switched pins of power supply chip U1 are as the defeated of delay electrification circuit
Outlet, the base stage of the other end connecting triode Q1 of capacitor C1, the collector of triode Q1 and one end of capacitor C2 are all connected with electricity
The ground terminal of the enable end of source chip U1, the collector of triode Q1, the other end of capacitor C2 and power supply chip U1 is grounded.
It preferably, further include resistance R1 and diode D1, the cathode of diode D1 is connect with the other end of capacitor C1, electricity two
The collector of the positive connecting triode Q1 of pole pipe D1, resistance R1 are connected in parallel on the both ends of diode D1.
It preferably, further include resistance R2, the cathode of the diode D1 is connect by resistance R2 with the other end of capacitor C1.
Preferably, the model TPS54302 of the power supply chip U1.
Compared with prior art, the utility model has the beneficial effects that:
The utility model can eliminate the operation irregularity of the timing master of power supply shakiness and logical device, make circuit work steady
Under fixed power environment, the reliability of circuit can be significantly improved, increases the stability of product, reduces maintenance caused by device failure
Cost and Material Cost.
Detailed description of the invention
Fig. 1 is the circuit structure diagram of prior art 1；
Fig. 2 is the circuit structure diagram of prior art 2；
Fig. 3 is a kind of circuit structure diagram of delay electrification circuit of the utility model.
Specific embodiment
In the following, being described further in conjunction with attached drawing and specific embodiment to the utility model:
As shown in figure 3, the utility model provides a kind of delay electrification circuit, primarily to solving product input power wave
It is dynamic to cause system exception and failure, increase the reliability and stability of product.It is different from the prior art and is noteworthy characterized by circuit
On voltage cannot can exist slowly accumulation the case where, cannot be mutated by Capacitor apart direct current, and using capacitor both end voltage
Characteristic come control one to capacitor discharge triode come release power down hold on residual voltage, can be at power supply long-time
Delay is provided when power-on and power-off and powers on defencive function.The utility model include power supply chip U1, triode Q1, capacitor C1,
One end of capacitor C2, capacitor C1 and the input pin of power supply chip U1 are connect with power input, and the conversion of power supply chip U1 is drawn
Output end of the foot as delay electrification circuit, the base stage of the other end connecting triode Q1 of capacitor C1, the collector of triode Q1
It is all connected with the enable end of power supply chip U1 with one end of capacitor C2, the other end and power supply of the collector of triode Q1, capacitor C2
The ground terminal of chip U1 is grounded.
Power supply chip is the DC-DC power source chip with the enabled foot that works, and power input directly inputs power supply chip all the way, passes through
1 foot that capacitor C1 is followed by triode is crossed, 3 feet of triode connect the enabled foot that capacitor C2 is connected to power supply chip together.
When VCC_in input power powers on, power supply directly inputs the input terminal of power supply chip U8, while capacitor C1 all the way
High level can also be become because capacitor both end voltage cannot be mutated capacitor lower end, this high level acts on 1 foot of pole pipe Q1, makes three
Pole pipe Q1 conducting bleeds off the electricity on capacitor C2.Then, because the partition direct current of capacitor works as power good by the characteristic of exchange
When, the high level of the lower end capacitor C1 is a spike, and after spike, the 1 foot level of discharge diode Q1 is lower, three poles of discharging
Pipe Q1 cut-off, capacitor C2 are started to charge by the charging current of chip interior, are 1.21V when the voltage on capacitor C2 rises to
Power supply chip works afterwards, and power supply starts to export.
It, can be power supply chip when upper piezoelectric voltage is more than 1V every time repeatedly when power-on and power-off when power input is unstable
U1 enables the capacitor on foot and draws to low level, so that power supply chip U1 is not worked output, charging capacitor just meeting only after power good
Reaching high level makes power supply chip U1 work output, guarantees that each delayed time is all reliable.
It further include resistance R1 and diode D1 as preferred embodiment, the cathode of diode D1 is another with capacitor C1's
One end connection, the collector of the positive connecting triode Q1 of electric diode D1, resistance R1 are connected in parallel on the both ends of diode D1.
It can also further comprise resistance R2, the cathode of the diode D1 is connected by the other end of resistance R2 and capacitor C1
It connects.
Diode and resistance, which are mainly used to divide, in the utility model protects triode not damaged by high voltage.Diode is
Zener diode, triode are discharge diode, and capacitor C1 is isolation capacitance, and capacitor C2 is charging capacitor.
It will be apparent to those skilled in the art that can make various other according to the above description of the technical scheme and ideas
Corresponding change and deformation, and all these changes and deformation all should belong to the protection of the utility model claims
Within the scope of.
Claims (4)
1. a kind of delay electrification circuit, which is characterized in that including power supply chip U1, triode Q1, capacitor C1, capacitor C2, capacitor
One end of C1 and the input pin of power supply chip U1 are connect with power input, and the switched pins of power supply chip U1 are as in delay
The one of the output end of circuit, the base stage of the other end connecting triode Q1 of capacitor C1, the collector of triode Q1 and capacitor C2
End is all connected with the enable end of power supply chip U1, the ground terminal of the collector of triode Q1, the other end of capacitor C2 and power supply chip U1
It is grounded.
2. delay electrification circuit as described in claim 1, which is characterized in that further include resistance R1 and diode D1, diode
The cathode of D1 is connect with the other end of capacitor C1, the collector of the positive connecting triode Q1 of electric diode D1, and resistance R1 is in parallel
At the both ends of diode D1.
3. delay electrification circuit as claimed in claim 2, which is characterized in that further include resistance R2, the diode D1's is negative
Pole is connect by resistance R2 with the other end of capacitor C1.
4. delay electrification circuit as described in claim 1, which is characterized in that the model of the power supply chip U1
TPS54302。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821504554.5U CN209402490U (en) | 2018-09-13 | 2018-09-13 | A kind of delay electrification circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821504554.5U CN209402490U (en) | 2018-09-13 | 2018-09-13 | A kind of delay electrification circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209402490U true CN209402490U (en) | 2019-09-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821504554.5U Active CN209402490U (en) | 2018-09-13 | 2018-09-13 | A kind of delay electrification circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209402490U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111026215A (en) * | 2019-12-04 | 2020-04-17 | 深圳市优必选科技股份有限公司 | Power-on control circuit and power-on control system of steering engine |
| CN113432184A (en) * | 2021-08-03 | 2021-09-24 | 山东佐耀智能装备股份有限公司 | Energy-saving system for peak-shifting operation of central air conditioner based on phase-change material energy storage |
-
2018
- 2018-09-13 CN CN201821504554.5U patent/CN209402490U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111026215A (en) * | 2019-12-04 | 2020-04-17 | 深圳市优必选科技股份有限公司 | Power-on control circuit and power-on control system of steering engine |
| CN113432184A (en) * | 2021-08-03 | 2021-09-24 | 山东佐耀智能装备股份有限公司 | Energy-saving system for peak-shifting operation of central air conditioner based on phase-change material energy storage |
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