CN207926456U - A kind of load connection circuit of resistance-capacitance depressurization - Google Patents
A kind of load connection circuit of resistance-capacitance depressurization Download PDFInfo
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- CN207926456U CN207926456U CN201820469053.1U CN201820469053U CN207926456U CN 207926456 U CN207926456 U CN 207926456U CN 201820469053 U CN201820469053 U CN 201820469053U CN 207926456 U CN207926456 U CN 207926456U
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Abstract
The utility model is related to a kind of loads of resistance-capacitance depressurization to connect circuit, including capacitance-resistance voltage reduction circuit and the load circuit that connect with capacitance-resistance voltage reduction circuit, and aforementioned load circuit includes the relay (K1) for using VDD power supplys, using the MCU of VCC power supplys；It is characterized in that：Further include the first triode (Q1), the 4th resistance (R4), the second diode (D2), the 5th resistance (R5), the second triode (Q2), the 6th resistance (R6) and the 7th resistance (R7) compared with prior art, the utility model has the advantage of：The utility model is higher than the design method of the first load power source VDD using the second supported V CC potentials, meets the MCU control circuit design that I/O port is initialized as high level.
Description
Technical field
The utility model is related to a kind of loads of resistance-capacitance depressurization to connect circuit.
Background technology
The load connection circuit of capacitance-resistance step down type is more more economical than transformer pressure-reducing, but cannot export larger electric current,
And it is lossy on resistance, without being isolated with ground, use is dangerous, is only suitable for small-sized integrated charger and control circuit
The little occasion of equal electric currents.
The load of existing resistance-capacitance depressurization is all to use parallel way, and power supply service efficiency is low, and circuit is referring to attached drawing 1 or Fig. 2
It is shown, wherein capacitance-resistance voltage reduction circuit be custom circuit, including first resistor R1, second resistance R2,3rd resistor R3, capacitance CX1,
Rectifier bridge D1, capacitance E1, voltage-stabiliser tube ZD1, voltage-stabiliser tube ZD2, capacitance E2, capacitance C1, the connection relation of each element referring to attached drawing 1 or
Shown in Fig. 2, the output voltage of VDD and VCC can be generated respectively；When there are three loads for the connection of above-mentioned capacitance-resistance voltage reduction circuit --- relay
The power supply of device K1, MCU and display screen dispay, MCU are VCC, and the power supply of relay K1 is VDD, display screen
The power supply of dispay is VCC, these three loads are attached by the way of in parallel, therefore pass through the electric current of capacitance CX1
The electric current of=relay current+mcu electric currents+display screen dispay, at this time second resistance R2 and 3rd resistor R3 can all generate greatly
The heat of amount, especially " relay current<When (when mcu electric currents+display portion electric current) ", power supply service efficiency is lower.
In order to overcome above-mentioned technical problem, a kind of electricity of the load in series of capacitance-resistance voltage reduction circuit is also had in the prior art
Road, circuit connection diagram is shown in Figure 3, and it includes first resistor R1, second resistance R2,3rd resistor R3, capacitance CX1, whole
Flow bridge D1, capacitance E1, capacitance C1, voltage-stabiliser tube ZD1, voltage-stabiliser tube ZD2, capacitance E2, capacitance C2, the connection relation of each element referring to
Shown in attached drawing 3, the output voltage of VDD and VCC can be generated respectively；There are three loads for capacitance-resistance voltage reduction circuit connection --- relay
The power supply of K1, MCU and display screen dispay, MCU are VCC, and the power supply of relay K1 is VDD, display screen dispay
Power supply be VCC, VCC and VDD be concatenated relationship, the cathode (- VDD) of VDD is just the anode (+VCC) of VCC, i.e.,
The potential ratio VCC highers of VDD, belong to negative voltage control model.This power supply service efficiency higher, reduces in Fig. 1 and Fig. 2
The loss of " 3rd resistor R3 ", stand-by power consumption is also lower, but when some MCU are initialized, exports as high level, meeting when initialization
K1 is caused to malfunction.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of over-pressure control pattern for the above-mentioned prior art
The load of resistance-capacitance depressurization connects circuit.
Technical solution is used by the utility model solves above-mentioned technical problem：A kind of load connection electricity of resistance-capacitance depressurization
Road, including the capacitance-resistance voltage reduction circuit of VCC and VDD can be exported and connect with capacitance-resistance voltage reduction circuit load circuit, load circuit packet
Include the relay using VDD power supplys, using the MCU of VCC power supplys；It is characterized in that：
The capacitance-resistance voltage reduction circuit includes first resistor, second resistance, the first capacitance, rectifier bridge, the second capacitance, third electricity
Appearance, the 4th capacitance, the 5th capacitance, the first voltage-stabiliser tube and the second voltage-stabiliser tube, the 1st pin connection capacitance-resistance voltage reduction circuit of rectifier bridge
2nd pin of "-VDD " power output end, rectifier bridge is connect with the first capacitance first end, and the 3rd pin of rectifier bridge connects capacitance-resistance
"+VCC " power output end of reduction voltage circuit, the first end of the 4th pin connection second resistance of rectifier bridge, the second of the first capacitance
End is connected with alternating current zero curve, and the both ends of first resistor are connected with the both ends of the first capacitance respectively, the second end of second resistance and city
Electrical fire line connects, and "+VCC " power output end of the cathode connection capacitance-resistance voltage reduction circuit of the first voltage-stabiliser tube, the first voltage-stabiliser tube is just
Pole connects the cathode of the second voltage-stabiliser tube, and the first voltage-stabiliser tube anode connects "+VDD " and "-VCC " power supply output of capacitance-resistance voltage reduction circuit
The two of end, "-VDD " power output end of the anode connection capacitance-resistance voltage reduction circuit of the second voltage-stabiliser tube, the second capacitance and third capacitance
End is connected to the both ends of the first voltage-stabiliser tube, the first end of the 4th capacitance and the first end of the 5th capacitance with the first voltage-stabiliser tube
Anode or the second voltage-stabiliser tube cathode connection, the second end of the 4th capacitance and the second end of the 5th capacitance with the second voltage-stabiliser tube
Anode connection；
The load circuit further include the first triode, the 4th resistance, the second diode, the 5th resistance, the second triode,
6th resistance and the 7th resistance, wherein "+VDD " power output end of capacitance-resistance voltage reduction circuit connect the current collection of the first triode Q1
Pole, the second end of the emitter connection relay coil of the first triode, the first end and capacitance-resistance voltage reduction circuit of relay coil
The connection of "-VDD " power output end, the base stage of the first triode connects the collector phase with the second triode after the 5th resistance
Even, the emitter of the second triode is connected to "+VCC " power output end of capacitance-resistance voltage reduction circuit, and the base stage of the second triode connects
It is connect with the I/O pin of MCU after connecing the 6th resistance, the base stage of the first triode is also connected with after the 4th resistance second with relay
End connection；The cathode of second diode is connect with the emission electrode of the first triode, the anode and resistance-capacitance depressurization of the second diode
"-VDD " power output end of circuit connects；First end of the 7th resistance is connected to "+VCC " power supply output of capacitance-resistance voltage reduction circuit
End, the second end of the 7th resistance are connect with the base stage of the second triode；The Vdd pins of MCU and "+the VCC " of capacitance-resistance voltage reduction circuit
Power output end connects, and the Vss pins of MCU and "-VCC " power output end of capacitance-resistance voltage reduction circuit connect.
As an improvement, the load circuit can also include display screen, the Vdd pins and capacitance-resistance voltage reduction circuit of the display screen
The connection of "+VCC " power output end, "-VCC " power output end of the Vss pins of the display screen and capacitance-resistance voltage reduction circuit connects.
Compared with prior art, the utility model has the advantage of："+VDD " and "-VCC " power supply of capacitance-resistance voltage reduction circuit
Output end is drawn by same place, the VCC potential ratio VDD high of circuit, and therefore the utility model more has in initial conducive to I/O port
Turn to the circuit design of the MCU of high level.
Description of the drawings
Fig. 1 is the circuit diagram of the load connection circuit of resistance-capacitance depressurization in conventional example one；
Fig. 2 is the circuit diagram of the load connection circuit of resistance-capacitance depressurization in conventional example two；
Fig. 3 is that the load vacuum cavitations of resistance-capacitance depressurization in conventional example three connect the circuit diagram of circuit；
Fig. 4 is that the load over-pressure control of resistance-capacitance depressurization in the utility model embodiment one connects the circuit diagram of circuit；
Fig. 5 is that the load over-pressure control of resistance-capacitance depressurization in the utility model embodiment two connects the circuit diagram of circuit.
Specific implementation mode
The utility model is described in further detail below in conjunction with attached drawing embodiment.
Embodiment one：
The load of resistance-capacitance depressurization as shown in Figure 4 connects circuit, including capacitance-resistance voltage reduction circuit and connects with capacitance-resistance voltage reduction circuit
The load circuit connect, the capacitance-resistance voltage reduction circuit include first resistor R1, second resistance R2, the first capacitance CX1, rectifier bridge D1,
Second capacitance E1, third capacitance C1, the 4th capacitance E2, the 5th capacitance C2, the first voltage-stabiliser tube ZD1, the second voltage-stabiliser tube ZD2, wherein
"-VDD " power output end of the 1st pin connection capacitance-resistance voltage reduction circuit of rectifier bridge D1, the 2nd pin of rectifier bridge D1 and the first electricity
Hold the connection of CX1 first ends, "+VCC " power output end of the 3rd pin connection capacitance-resistance voltage reduction circuit of rectifier bridge D1, rectifier bridge D1
The 4th pin connection second resistance R2 first end, the second end of the first capacitance CX1 connects with alternating current zero curve, first resistor R1
Both ends connected respectively with the both ends of the first capacitance CX1, the second end of second resistance R2 is connect with alternating current firewire, the first voltage-stabiliser tube
"+VCC " power output end of the cathode connection capacitance-resistance voltage reduction circuit of ZD1, anode the second voltage-stabiliser tube of connection of the first voltage-stabiliser tube ZD1
"+VDD " and "-VCC " power output end of capacitance-resistance voltage reduction circuit is drawn in the cathode of ZD2, the first voltage-stabiliser tube ZD1 connections, and second is steady
"-VDD " power output end of the anode connection capacitance-resistance voltage reduction circuit of pressure pipe ZD2, the both ends of the second capacitance E1 and third capacitance C1
It is connected to the both ends of the first voltage-stabiliser tube ZD1, the both ends of the 4th capacitance E2 and the 5th capacitance C2 are connected to the second voltage stabilizing
The both ends of pipe ZD2；Aforementioned load circuit includes the relay K1, the MCU using VCC power supplys, the one or three pole using VDD power supplys
Pipe Q1, the 4th resistance R4, the second diode D2, the 5th resistance R5, the second triode Q2, the 6th resistance R6 and the 7th resistance R7,
Wherein "+VDD " power output end of capacitance-resistance voltage reduction circuit connects the collector of the first triode Q1, the transmitting of the first triode Q1
Pole connects the second end of relay K1 coils, and the first end of relay K1 coils and "-VDD " power supply of capacitance-resistance voltage reduction circuit export
End connects, and is connected with the collector of the second triode Q2 after the 5th resistance R5 of base stage connection of the first triode Q1, the two or three pole
The emitter of pipe Q2 is connected to "+VCC " power output end of capacitance-resistance voltage reduction circuit, the 6th electricity of base stage connection of the second triode Q2
It is connect with the I/O pin of MCU after resistance R6, the base stage of the first triode Q1 is also connected with after the 4th resistance R4 second with relay K1
End connection；The cathode of second diode D2 is connect with the emission electrode of the first triode Q1, anode and the resistance of the second diode D2
Hold "-VDD " power output end connection of reduction voltage circuit；The first end of 7th resistance R7 is connected to "+VCC " electricity of capacitance-resistance voltage reduction circuit
Source output terminal, the second end of the 7th resistance R7 are connect with the base stage of the second triode Q2；The Vdd pins of MCU and resistance-capacitance depressurization electricity
"+VCC " the power output end on road connects, and the Vss pins of MCU and "-VCC " power output end of capacitance-resistance voltage reduction circuit connect.
The load circuit can also include display screen, the Vdd pins of the display screen and "+the VCC " of capacitance-resistance voltage reduction circuit
Power output end connects, and the Vss pins of the display screen and "-VCC " power output end of capacitance-resistance voltage reduction circuit connect.
In the present embodiment, the VCC power supplys of existing capacitance-resistance voltage reduction circuit and VDD power supplys are together in series, by the anode of VDD (+
VDD) and the cathode of VCC (- VCC) connects to obtain the power supply output of voltage (VCC+VDD), the VCC potential ratios VDD of circuit
It is high；Therefore the present embodiment more has in the circuit design for the MCU for being initialized as high level conducive to I/O port.
Embodiment two：
What is different from the first embodiment is that the both ends of the 4th capacitance E2 and the 5th capacitance C2 be connected to capacitance-resistance voltage reduction circuit "+
Between VCC " and "-VDD " power output end, it is also connected to the cathode of the first voltage-stabiliser tube ZD1 and the anode of the second voltage-stabiliser tube ZD2
Between, it is shown in Figure 5.
Claims (2)
1. a kind of load of resistance-capacitance depressurization connects circuit, including can export the capacitance-resistance voltage reduction circuit and and resistance-capacitance depressurization of VCC and VDD
The load circuit of circuit connection；Aforementioned load circuit includes using the relay (K1) of VDD power supplys, using the MCU of VCC power supplys；
It is characterized in that：
The capacitance-resistance voltage reduction circuit includes first resistor (R1), second resistance (R2), the first capacitance (CX1), rectifier bridge (D1),
Two capacitances (E1), third capacitance (C1), the 4th capacitance (E2), the 5th capacitance (C2), the first voltage-stabiliser tube (ZD1) and the second voltage-stabiliser tube
(ZD2), "-VDD " power output end of the 1st pin connection capacitance-resistance voltage reduction circuit of rectifier bridge (D1), the 2nd of rectifier bridge (D1) draws
Foot is connect with the first capacitance (CX1) first end, and "+VCC " power supply of the 3rd pin extraction capacitance-resistance voltage reduction circuit of rectifier bridge (D1) is defeated
Outlet, the first end of the 4th pin connection second resistance (R2) of rectifier bridge (D1), the second end and alternating current of the first capacitance (CX1)
Zero curve connects, and the both ends of first resistor (R1) are connected with the both ends of the first capacitance (CX) 1 respectively, the second end of second resistance (R2)
It is connect with alternating current firewire, "+VCC " power output end of the cathode connection capacitance-resistance voltage reduction circuit of the first voltage-stabiliser tube (ZD1), first is steady
The cathode of anode the second voltage-stabiliser tube of connection (ZD2) of pressure pipe (ZD1), the first voltage-stabiliser tube (ZD1) anode draw capacitance-resistance voltage reduction circuit
"+VDD " and "-VCC " power output end；The anode of second voltage-stabiliser tube (ZD2) draws "-VDD " power supply of capacitance-resistance voltage reduction circuit
The both ends of output end, the second capacitance (E1) and third capacitance (C1) are connected to the both ends of the first voltage-stabiliser tube (ZD1), the 4th electricity
Hold (E2) first end and the 5th capacitance (C2) first end with the second voltage-stabiliser tube of anode (ZD2) of the first voltage-stabiliser tube (ZD1)
Cathode connection, the 4th capacitance (anode of the second end of E2 and the second end of the 5th capacitance (C2) with the second voltage-stabiliser tube (ZD2)
Connection；
The load circuit further includes the first triode (Q1), the 4th resistance (R4), the second diode (D2), the 5th resistance
(R5), the second triode (Q2), the 6th resistance (R6) and the 7th resistance (R7), "+VDD " power supply of wherein capacitance-resistance voltage reduction circuit are defeated
Outlet connects the collector of the first triode (Q1), the first triode (second of emitter connection relay (K1) coil of Q1
End, the first end of relay (K1) coil and "-VDD " power output end of capacitance-resistance voltage reduction circuit connect, the first triode (Q1)
Base stage connect the 5th resistance (R5) and be connected afterwards with the collector of the second triode (Q2), the emitter of the second triode (Q2) company
Be connected to "+VCC " power output end of capacitance-resistance voltage reduction circuit, the base stage of the second triode (Q2) connect the 6th resistance (R6) afterwards with
The I/O pin of MCU connects, and the base stage of the first triode (Q1) is also connected with the 4th resistance (R4) and connects afterwards with the second end of relay K1
It connects；The cathode of second diode (D2) is connect with the emission electrode of the first triode (Q1), the second diode (D2) anode with
"-VDD " power output end of capacitance-resistance voltage reduction circuit connects；First end of the 7th resistance (R7) be connected to capacitance-resistance voltage reduction circuit "+
The second end of VCC " power output ends, the 7th resistance (R7) is connect with the base stage of the second triode (Q2)；The Vdd pins of MCU with
"+VCC " power output end of capacitance-resistance voltage reduction circuit connects, and the Vss pins of MCU and "-VCC " power supply of capacitance-resistance voltage reduction circuit export
End connection.
2. the load of resistance-capacitance depressurization according to claim 1 connects circuit, it is characterised in that：The load circuit further includes
Display screen, the Vdd pins of the display screen and "+VCC " power output end of capacitance-resistance voltage reduction circuit connect, and the Vss of the display screen draws
"-VCC " power output end of foot and capacitance-resistance voltage reduction circuit connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820469053.1U CN207926456U (en) | 2018-03-30 | 2018-03-30 | A kind of load connection circuit of resistance-capacitance depressurization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820469053.1U CN207926456U (en) | 2018-03-30 | 2018-03-30 | A kind of load connection circuit of resistance-capacitance depressurization |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207926456U true CN207926456U (en) | 2018-09-28 |
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ID=63595517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820469053.1U Active CN207926456U (en) | 2018-03-30 | 2018-03-30 | A kind of load connection circuit of resistance-capacitance depressurization |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207926456U (en) |
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2018
- 2018-03-30 CN CN201820469053.1U patent/CN207926456U/en active Active
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