CN205178885U - False load circuit of automation and switching power supply among switching power supply - Google Patents
False load circuit of automation and switching power supply among switching power supply Download PDFInfo
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- CN205178885U CN205178885U CN201521003491.1U CN201521003491U CN205178885U CN 205178885 U CN205178885 U CN 205178885U CN 201521003491 U CN201521003491 U CN 201521003491U CN 205178885 U CN205178885 U CN 205178885U
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Abstract
The utility model relates to a false load circuit of automation and switching power supply among switching power supply, automatic false load circuit includes singlechip U15, MOSFET field effect transistor Q14, resistance R131, triode Q1. MOSFET field effect transistor Q14's the G utmost point is connected to singlechip U15's IO port no. 1, MOSFET field effect transistor Q14's S utmost point ground connection, MOSFET field effect transistor Q14's D extremely connects resistance R131's one end, resistance R131's the other end and the rectification filter circuit's among the switching power supply positive output end meet. The utility model discloses utilize singlechip U15's the IO port no. 1 or the high -low level of IO port no. 2 to control opening, turn -offing of MOSFET field effect transistor Q14 and triode Q1 to reach automatic control's mesh. The utility model provides high switching power supply's reliable degree, reduce the disability rate of battery, made the contribution to the country is energy -concerving and environment -protective.
Description
Technical field
The utility model relates to automatic dummy load circuit in a kind of Switching Power Supply and Switching Power Supply.
Background technology
At present, switched power output is generally all connected to fixing dummy load circuit, if Switching Power Supply is connected on battery-end for a long time can cause battery power shortage and permanent damages.
Utility model content
The technical problems to be solved in the utility model is: overcome the deficiencies in the prior art, provides the automatic dummy load circuit in a kind of Switching Power Supply and Switching Power Supply.
The utility model solves the technical scheme that its technical problem adopts: the automatic dummy load circuit in a kind of Switching Power Supply, comprises single-chip microcomputer U15, MOSFET field effect transistor Q14, resistance R131, triode Q1.
The I/O port one of described single-chip microcomputer U15 connects the G pole of MOSFET field effect transistor Q14, the S pole ground connection of described MOSFET field effect transistor Q14, one end of the D pole connecting resistance R131 of described MOSFET field effect transistor Q14; The described other end of resistance R131 connects with the cathode output end of the current rectifying and wave filtering circuit in Switching Power Supply.
The b pole of the I/O port two connecting triode Q1 of described single-chip microcomputer U15, the e pole ground connection of described triode Q1, the c pole of described triode Q1 connects one end of relay K 1 coil in Switching Power Supply, another termination power VCC of described relay K 1 coil.
The model of described single-chip microcomputer U15 is PIC16F876A, and described MOSFET field effect transistor Q14 model is 4N20, and the resistance of described resistance R131 is 22K Ω, and triode Q1 is NPN type.
A kind of Switching Power Supply, comprise main pwm circuit, inverter circuit, output rectifier and filter, single-chip microcomputer U15, also comprise MOSFET field effect transistor Q14, resistance R131, triode Q1, relay K 1, resistance R129, resistance R130, resistance R21, resistance R22, diode D1.
Described resistance R129 one end connects the 23 pin outputs of single-chip microcomputer U15, the G pole of the other end one termination MOSFET field effect transistor Q14 of described resistance R129, the S pole ground connection of described MOSFET field effect transistor Q14.
The G pole of described resistance R130 mono-termination MOSFET field effect transistor Q14, the S pole of described another termination MOSFET field effect transistor Q14 of resistance R130.
One end of the D pole connecting resistance R131 of described MOSFET field effect transistor Q14, the cathode output end of another termination current rectifying and wave filtering circuit of described resistance R131.
One end of the 14 pin connecting resistance R21 of described single-chip microcomputer U15, the b pole of another termination triode of described resistance R21 Q1, the c pole of described triode Q1 connects diode D1 positive pole, and described diode D1 negative pole meets power supply VCC.
Coil and the diode D1 of described relay K 1 are connected in parallel, the cathode output end of the normal open switch one termination current rectifying and wave filtering circuit of described relay K 1, the cathode output end of another termination Switching Power Supply of the normal open switch of described relay K 1, the cathode output end of described current rectifying and wave filtering circuit connects the cathode output end of Switching Power Supply.
Further, described resistance R22 one end connects with the b pole of triode Q1, and the other end of described resistance R22 connects with the e pole of triode Q1.
The model of described single-chip microcomputer U15 is PIC16F876A, and described MOSFET field effect transistor Q14 model is 4N20, and the resistance of described resistance R131 is 22K Ω, and triode Q1 is NPN type, and described resistance R129 resistance is 1K Ω, resistance R130 resistance is 10K Ω.
The beneficial effects of the utility model are: the utility model utilizes the I/O port one of single-chip microcomputer U15 or the low and high level of I/O port two to the opening of control MOSFET field effect transistor Q14 and triode Q1, turns off, to reach the object automatically controlled.Be in series with dummy resistance R131 in loop of the present utility model, the utility model improves the reliability of Switching Power Supply, decreases the scrappage of battery, contributes to national energy-saving environmental protection.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is further illustrated.
Fig. 1 is the schematic block circuit diagram of the Switching Power Supply in the utility model;
Fig. 2 is the circuit connection diagram of the embodiment one of Switching Power Supply in the utility model.
Embodiment
By reference to the accompanying drawings the utility model is further described now.The schematic diagram that these accompanying drawings are simplification only illustrates basic structure of the present utility model in a schematic way, and therefore it only shows the formation relevant with the utility model.
As shown in Figure 1, the automatic dummy load circuit in a kind of Switching Power Supply, comprises single-chip microcomputer U15, MOSFET field effect transistor Q14, resistance R131, triode Q1.
The I/O port one of described single-chip microcomputer U15 connects the G pole of MOSFET field effect transistor Q14, the S pole ground connection of described MOSFET field effect transistor Q14, one end of the D pole connecting resistance R131 of described MOSFET field effect transistor Q14; The described other end of resistance R131 connects with the cathode output end of the current rectifying and wave filtering circuit in Switching Power Supply.
The b pole of the I/O port two connecting triode Q1 of described single-chip microcomputer U15, the e pole ground connection of described triode Q1, the c pole of described triode Q1 connects one end of relay K 1 coil in Switching Power Supply, another termination power VCC of described relay K 1 coil.
The model of described single-chip microcomputer U15 is PIC16F876A, and described MOSFET field effect transistor Q14 model is 4N20, and the resistance of described resistance R131 is 22K Ω, and triode Q1 is NPN type.
As shown in Figure 2, a kind of Switching Power Supply, comprise main pwm circuit, inverter circuit, output rectifier and filter, single-chip microcomputer U15, also comprise MOSFET field effect transistor Q14, resistance R131, triode Q1, relay K 1, resistance R129, resistance R130, resistance R21, resistance R22, diode D1.
Described resistance R129 one end connects the 23 pin outputs of single-chip microcomputer U15, the G pole of the other end one termination MOSFET field effect transistor Q14 of described resistance R129, the S pole ground connection of described MOSFET field effect transistor Q14.
The G pole of described resistance R130 mono-termination MOSFET field effect transistor Q14, the S pole of described another termination MOSFET field effect transistor Q14 of resistance R130.
One end of the D pole connecting resistance R131 of described MOSFET field effect transistor Q14, the cathode output end of another termination current rectifying and wave filtering circuit of described resistance R131.
One end of the 14 pin connecting resistance R21 of described single-chip microcomputer U15, the b pole of another termination triode of described resistance R21 Q1, the c pole of described triode Q1 connects diode D1 positive pole, and described diode D1 negative pole meets power supply VCC.Described resistance R22 one end connects with the b pole of triode Q1, and the other end of described resistance R22 connects with the e pole of triode Q1.
Coil and the diode D1 of described relay K 1 are connected in parallel, the cathode output end of the normal open switch one termination current rectifying and wave filtering circuit of described relay K 1, the cathode output end of another termination Switching Power Supply of the normal open switch of described relay K 1, the cathode output end of described current rectifying and wave filtering circuit connects the cathode output end of Switching Power Supply.
The model of described single-chip microcomputer U15 is PIC16F876A, and described MOSFET field effect transistor Q14 model is 4N20, and the resistance of described resistance R131 is 22K Ω, and triode Q1 is NPN type, and described resistance R129 resistance is 1K Ω, resistance R130 resistance is 10K Ω.
The operation principle of this Switching Power Supply:
During normal work, 14 pin of single-chip microcomputer U15 export high level, and the coil of relay K 1 obtains electric, and the normal open switch adhesive of relay K 1, Switching Power Supply can charge the battery.23 pin of single-chip microcomputer U15 export high level and make MOSFET field effect transistor Q14 conducting, and resistance R131 forms loop to ground, and resistance R131 is dummy load.
When battery is full of, the normal open switch of relay K 1 disconnects.Now 23 pin of single-chip microcomputer U15 export high level and make MOSFET field effect transistor Q14 conducting, and power supply switches, because resistance R131 exists the cathode output end voltage stabilization of current rectifying and wave filtering circuit to zero load by being fully loaded with.After single-chip microcomputer U15 postponed for 5 seconds, its 23 pin output low level makes MOSFET field effect transistor Q14 turn off, and resistance R131 is in open-circuit condition, does not have loss to battery.
Pull out capable AC plug after battery is full of, after single-chip microcomputer U15 power-off, the coil of relay K1, MOSFET field effect transistor Q14 all turn off, and resistance R131 opens a way, and does not have loss to battery.
The utility model utilizes the I/O port one of single-chip microcomputer U15 or the low and high level of I/O port two to the opening of control MOSFET field effect transistor Q14 and triode Q1, turns off, to reach the object automatically controlled.Be in series with dummy resistance R131 in loop of the present utility model, the utility model improves the reliability of Switching Power Supply, decreases the scrappage of battery, contributes to national energy-saving environmental protection.
With above-mentioned according to desirable embodiment of the present utility model for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this utility model technological thought, can carry out various change and amendment completely.The technical scope of this utility model is not limited to the content on specification, must determine its technical scope according to right.
Claims (5)
1. the automatic dummy load circuit in Switching Power Supply, is characterized in that, comprises single-chip microcomputer U15, MOSFET field effect transistor Q14, resistance R131, triode Q1;
The I/O port one of described single-chip microcomputer U15 connects the G pole of MOSFET field effect transistor Q14, the S pole ground connection of described MOSFET field effect transistor Q14, one end of the D pole connecting resistance R131 of described MOSFET field effect transistor Q14; The described other end of resistance R131 connects with the cathode output end of the current rectifying and wave filtering circuit in Switching Power Supply;
The b pole of the I/O port two connecting triode Q1 of described single-chip microcomputer U15, the e pole ground connection of described triode Q1, the c pole of described triode Q1 connects one end of relay K 1 coil in Switching Power Supply, another termination power VCC of described relay K 1 coil.
2. the automatic dummy load circuit in Switching Power Supply according to claim 1, it is characterized in that, the model of described single-chip microcomputer U15 is PIC16F876A, and described MOSFET field effect transistor Q14 model is 4N20, the resistance of described resistance R131 is 22K Ω, and triode Q1 is NPN type.
3. a Switching Power Supply, comprise main pwm circuit, inverter circuit, output rectifier and filter, single-chip microcomputer U15, it is characterized in that, also comprise MOSFET field effect transistor Q14, resistance R131, triode Q1, relay K 1, resistance R129, resistance R130, resistance R21, resistance R22, diode D1;
Described resistance R129 one end connects the 23 pin outputs of single-chip microcomputer U15, the G pole of another termination MOSFET field effect transistor Q14 of described resistance R129, the S pole ground connection of described MOSFET field effect transistor Q14;
The G pole of described resistance R130 mono-termination MOSFET field effect transistor Q14, the S pole of described another termination MOSFET field effect transistor Q14 of resistance R130;
One end of the D pole connecting resistance R131 of described MOSFET field effect transistor Q14, the cathode output end of another termination current rectifying and wave filtering circuit of described resistance R131;
One end of the 14 pin connecting resistance R21 of described single-chip microcomputer U15, the b pole of another termination triode of described resistance R21 Q1, the c pole of described triode Q1 connects diode D1 positive pole, and described diode D1 negative pole meets power supply VCC;
Coil and the diode D1 of described relay K 1 are connected in parallel, the cathode output end of the normal open switch one termination current rectifying and wave filtering circuit of described relay K 1, the cathode output end of another termination Switching Power Supply of the normal open switch of described relay K 1, the cathode output end of described current rectifying and wave filtering circuit connects the cathode output end of Switching Power Supply.
4. Switching Power Supply according to claim 3, is characterized in that, described resistance R22 one end connects with the b pole of triode Q1, and the other end of described resistance R22 connects with the e pole of triode Q1.
5. Switching Power Supply according to claim 3, it is characterized in that, the model of described single-chip microcomputer U15 is PIC16F876A, described MOSFET field effect transistor Q14 model is 4N20, the resistance of described resistance R131 is 22K Ω, triode Q1 is NPN type, and described resistance R129 resistance is 1K Ω, resistance R130 resistance is 10K Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521003491.1U CN205178885U (en) | 2015-12-07 | 2015-12-07 | False load circuit of automation and switching power supply among switching power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521003491.1U CN205178885U (en) | 2015-12-07 | 2015-12-07 | False load circuit of automation and switching power supply among switching power supply |
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| Publication Number | Publication Date |
|---|---|
| CN205178885U true CN205178885U (en) | 2016-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521003491.1U Expired - Fee Related CN205178885U (en) | 2015-12-07 | 2015-12-07 | False load circuit of automation and switching power supply among switching power supply |
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| CN (1) | CN205178885U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253636A (en) * | 2015-12-07 | 2016-12-21 | 张家港市华为电子有限公司 | Automatic dummy load circuit in switching power supply and switching power supply |
-
2015
- 2015-12-07 CN CN201521003491.1U patent/CN205178885U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253636A (en) * | 2015-12-07 | 2016-12-21 | 张家港市华为电子有限公司 | Automatic dummy load circuit in switching power supply and switching power supply |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160420 Termination date: 20181207 |
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| CF01 | Termination of patent right due to non-payment of annual fee |