CN209151003U - A kind of switching power supply system - Google Patents
A kind of switching power supply system Download PDFInfo
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- CN209151003U CN209151003U CN201822211368.9U CN201822211368U CN209151003U CN 209151003 U CN209151003 U CN 209151003U CN 201822211368 U CN201822211368 U CN 201822211368U CN 209151003 U CN209151003 U CN 209151003U
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Abstract
The utility model relates to switch power technologies, and in particular to a kind of switching power supply system, including DC-DC booster system, UC3843 hard wired feed back system, AD sampling system, control system, secondary power system and Over Current Protection System；DC-DC booster system is connected to after input direct-current source of stable pressure; UC3843 hard wired feed back system is connect with DC-DC booster system; AD sampling system welding system output voltage; control system is separately connected UC3843 hard wired feed back system, AD sampling system and Over Current Protection System; secondary power system is connected to after input direct-current source of stable pressure; for the power supply of UC3843 hard wired feed back system, AD sampling system, control system and Over Current Protection System, Over Current Protection System welding system output voltage.Switching power supply system voltage stepping is adjustable, stability is high for this, has stronger load capacity and overcurrent protection and self-healing function.Compact overall structure, circuit is simple, easy to operate, and human-computer interaction is friendly.
Description
Technical field
The utility model belongs to switch power technology field more particularly to a kind of switching power supply system.
Background technique
Switching Power Supply is using modern power electronics technology, and the time ratio that control switch pipe turns on and off maintains defeated
A kind of power supply of voltage stabilization out, Switching Power Supply are usually to be made of pulse width modulation (PWM) control IC and MOSFET.Its
Function is the ecosystem power supply that power quality is poor, is converted into meeting the higher DC voltage of quality of equipment requirement.Currently,
Switching Power Supply is widely used in being that leading various terminals are set with electronic computer with small-sized, light weight and efficient feature
The almost all of electronic equipment such as standby, communication equipment.Since Switching Power Supply technically has very big advantage compared with linear power supply, just
Market is promoted gradually to eliminate linear power supply, it is indispensable that Switching Power Supply also becomes current electronics and information industry rapid development
A kind of power mode.Currently, switch power technology on the market have been relatively mature, but still there is output ripple compared with
Greatly, the problems such as circuit is complicated, not easy to repair.Therefore, it is necessary to it is a kind of it is more efficient, reliability is higher, performance is more stable, low noise
Switching Power Supply.
Utility model content
The purpose of the utility model is to provide a kind of more high and low noises of efficiency and reliability, the good switch of human-computer interaction
Regulated power supply.
A kind of switching power supply system that in order to achieve the above purposes, the technical solution adopted by the utility model is:, including it is defeated
Enter direct-flow voltage regulation source and system output voltage, including DC-DC booster system, UC3843 hard wired feed back system, AD sampling system, control
System, secondary power system and Over Current Protection System processed；DC-DC booster system is connected to after input direct-current source of stable pressure,
UC3843 hard wired feed back system is connect with DC-DC booster system, and AD sampling system welding system output voltage, control system connects respectively
UC3843 hard wired feed back system, AD sampling system and Over Current Protection System are connect, secondary power system is connected to input direct-current pressure stabilizing
It is UC3843 hard wired feed back system, AD sampling system, control system and Over Current Protection System power supply, overcurrent protection system after source
System welding system output voltage.
In above-mentioned switching power supply system, DC-DC booster system includes inductance, freewheeling diode, switching tube
CSD19536, filter capacitor, load and sampling resistor Rs, inductance connection is after input direct-current source of stable pressure, freewheeling diode string
In circuit, switching tube CSD19536, filter capacitor and load are in parallel in circuit for connection.
In above-mentioned switching power supply system, secondary power system include 12V power supply, 5V power supply and
3.3V power supply；It is electric by being depressured the BUCK that chip TPS5430 is built after 12V power supply is connected to DC-DC booster system
Rood is to 12V DC power supply；5V power supply connects in 12V power supply rear class, generates 5V direct current by linear stable 7805
Power supply；3V power supply connects in 5V power supply rear class, generates 3V DC power supply by linear stable LM1117.
In above-mentioned switching power supply system, UC3843 hard wired feed back system includes Switching Power Supply control chip
UC3843 and peripheral circuit；The end VCC of Switching Power Supply control chip UC3843 is connect with 12V power supply output end, the end RT/CT
It is connected to systematically with timing resistor, timing capacitor, switching frequency is arranged；The end VREF passes through timing resistor and the end RT/CT
It is connected, provides charging current to timing capacitor；The end ISEN is connected to switching tube CSD19536 source current detection resistance, is used for
Protective switch pipe CSD19536；The end OUT generates PWM wave control by driving resistance to connect with the grid of switching tube CSD19536
It is connected and shutdown, realizes system boosting；Feedback voltage is connected to the end VFB, is input to chip interior error amplifier, with inside
Error voltage is generated after 2.5V reference voltage, and then adjusts PWM duty cycle, systems stabilisation output voltage；The end COMP passes through
Compensation resistance and compensating electric capacity are connected with the end VFB；Bleeder resistance is connected between the grid source electrode of switching tube CSD19536.
In above-mentioned switching power supply system, control system include single-chip microcontroller MSP430F6638, OLED display screen,
Matrix keyboard, DA conversion chip DAC8560 and the first operational amplifier OPA350, second operational amplifier OPA227；OLED is aobvious
Display screen and matrix keyboard are integrated on expansion board UIBOARD, and are connected to single-chip microcontroller on the I/O port of interrupt function, are passed through
Row scanning method obtains key value and handles in control centre's single-chip microcontroller；The end DIN, SCLK, SYNC of DA conversion chip DAC8560
It is connect respectively with any I/O port of single-chip microcontroller, vdd terminal is connect with 3.3V power supply；First operational amplifier OPA350 is constituted
Output voltage of the DC-DC booster system after partial pressure is isolated by emitter follower with late-class circuit；Second operational amplifier
OPA227 and peripheral circuit composition adder, the end VOUT of DA conversion chip DAC8560 and the first operational amplifier OPA350's
Output end is connected with second operational amplifier OPA227 positive input terminal respectively, the output of second operational amplifier OPA227 with open
The end power supply control chip UC3843VFB is closed to be connected；First operational amplifier OPA350, second operational amplifier OPA227 are just
Power end is connect with 5V power supply, negative power end with systematically connect.
In above-mentioned switching power supply system, AD sampling system includes that bidirectional current shunts monitor INA282, height
Precision amplifier OPA227 and AD sampling A/D chip ADS1118 and peripheral circuit；Bidirectional current shunt monitor INA282 the end IN- and
The end IN+ passes through the first current-limiting resistance, the second current-limiting resistance and sampling resistor R respectivelysBoth ends are connected；The end REF1 and REF2 and system
Ground is connected；OUT terminal is connected to the end AIN0 of AD sampling A/D chip ADS1118 by third current-limiting resistance；High-operational amplifier OPA227
With peripheral circuit constitute emitter follower, the end V- be systematically connected；System output voltage is input to by divider resistance+
The end In, the end-In and the end Output are connected to the end AIN1 of AD sampling A/D chip ADS1118 by the 4th current-limiting resistance after being shorted；AD
The end SCLK, DIN, DOUT, CS of sampling A/D chip ADS1118 respectively with UCB0CLK, UCB0SIMO of single-chip microcontroller MSP430F6638,
UCB0SOMI is connected with any I/O port；Bidirectional current shunts the end V+ of monitor INA282 and high-operational amplifier OPA227 and AD is adopted
The vdd terminal of sample chip ADS1118 is connect with the output end of 3.3V power supply.
In above-mentioned switching power supply system, Over Current Protection System includes triode, light emitting diode and relay；
The base stage of triode is connect by resistance with any I/O port of single-chip microcontroller MSP430F6638, emitter with systematically connect, current collection
Pole is connect with one end of light-emitting diodes tube anode and relay coil, and the coil other end is connect with light-emitting diodes tube cathode；Relay
The normal-closed end of device is connected to the output end in DC-DC booster system；When exporting electric current more than over-current protection point, single-chip microcontroller
The I/O port of MSP430F6638 exports high level, and control relay disconnects output, realizes overcurrent protection, while light emitting diode point
Bright, expression system enters overcurrent protection state.
The utility model has the beneficial effects that the utility model switching power supply system voltage stepping is adjustable, stability is high,
With stronger load capacity and overcurrent protection and self-healing function.Compact overall structure, circuit is simple, easy to operate,
Human-computer interaction is friendly.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model one embodiment；
Fig. 2 is the DC-DC booster system circuit diagram of the utility model one embodiment；
Fig. 3 is the UC3843 hard wired feed back system circuit diagram of the utility model one embodiment；
Fig. 4 is the AD sampling system circuit diagram of the utility model one embodiment；
Fig. 5 (a) is the control system single-chip microcontroller display screen and keyboard schematic diagram of the utility model one embodiment；
Fig. 5 (b) is the control system conversion chip and operation amplifier circuit figure of the utility model one embodiment；
Fig. 6 is the secondary power system circuit diagram of the utility model one embodiment；
Fig. 7 is the utility model one embodiment Over Current Protection System circuit diagram；
Wherein, 1-DC-DC booster system, 2-UC3843 hard wired feed back system, 3-AD sampling system, 4- control system, 5-
Secondary power system, 6- Over Current Protection System, 11- inductance, 12- freewheeling diode, 13- close pipe CSD19536,14- filtered electrical
Hold, 15- load, 21- Switching Power Supply controls chip UC3843, and 31- bidirectional current shunts monitor INA282, and 32- high-precision is transported
Put OPA227,33-AD sampling A/D chip ADS1118,41- single-chip microcontroller MSP430F6638,42-OLED display screen, 43- matrix key
Disk, 44-DA conversion chip DAC8560,45- first operational amplifier OPA227,46- second operational amplifier OPA227,51-
12V power supply, 52-5V power supply, 53-3.3V power supply, 61- triode, 62- light emitting diode, 63- relay
Device.
Specific embodiment
The embodiments of the present invention is described in detail with reference to the accompanying drawing.
The present embodiment propose a kind of efficiency and reliability is higher, performance is more stable, low noise, have overcurrent protection and from
Recovery function, output voltage key is adjustable, load regulation and voltage regulation factor are low, the good switch voltage-stabilizing electricity of human-computer interaction
Source.
The present embodiment is achieved through the following technical solutions, as shown in Figure 1, a kind of switching power supply system, comprising:
DC-DC booster system 1, UC3843 hard wired feed back system 2, AD sampling system 3, control system 4, secondary power system 5 and overcurrent
Protection system 6.After DC-DC booster system 1 is connected to input direct-current source of stable pressure, output voltage is by processing as one fed back
Divide and be input to UC3843 hard wired feed back system 2, is exported to stablize.AD sampling system 3, control system 4 and secondary power system 5
As peripheral part.DC-DC booster system is connected to after input direct-current source of stable pressure, UC3843 hard wired feed back system and DC-DC
Booster system connection, AD sampling system welding system output voltage, control system is separately connected UC3843 hard wired feed back system, AD is adopted
Sample system and Over Current Protection System, secondary power system are connected to after input direct-current source of stable pressure, are UC3843 hard wired feed back system
System, AD sampling system, control system and Over Current Protection System power supply, Over Current Protection System welding system output voltage.Feedback voltage
Including two parts, a part is the system output voltage I after direct partial pressure, and another part is by AD sampling, single-chip microcontroller processing
And the system output voltage II after DA conversion.
As shown in Fig. 2, DC-DC booster system 1 includes inductance 11, freewheeling diode 12, switching tube CSD19536 13, filter
Wave capacitor 14 and load 15, are Boost booster systems.Inductance 11 is connected to after direct current input source of stable pressure, freewheeling diode 12
In circuit, switching tube CSD19536 13, filter capacitor 14 and load 15 are in parallel in circuit for series connection.Switching tube CSD19536
When 13 conducting, freewheeling diode 12 reversely ends, and input voltage only provides energy to inductance 11, loads 15 power supply completely by filtering
Wave capacitor 14 provides, and inductive current constantly increases；When switching tube CSD19536 13 is disconnected, 12 forward conduction of freewheeling diode is
Electric current constitutes circuit, and inductance 11 is powered to load 15 jointly by releasing magnetic energy and input source of stable pressure, together with filter capacitor 14
Electric current in load 15 is maintained to be basically unchanged.
As shown in figure 3, UC3843 hard wired feed back system 2 includes Switching Power Supply control chip UC3843 21 and peripheral circuit.
The end VCC of the chip is connect with the output end of 12V power supply 51 in secondary power system 5, and the end RT/CT and timing resistor are determined
When capacitance connection to systematically, switching frequency is arranged.The end VREF is connected by timing resistor with the end RT/CT, to oscillator
Timing capacitor provides charging current.The end ISEN is connected to 13 source current detection resistance of switching tube CSD19536, works as detection resistance
Both end voltage is more than threshold value, and PWM terminates switch conduction, and then protective efficient switch pipe CSD19536 13.OUT terminal passes through driving
Resistance is connect with the grid of switching tube 13, is generated PWM wave and is controlled its conducting and shutdown, realizes system boosting.Feedback voltage connection
To the end VFB, be input to chip interior error amplifier, compared with internal 2.5V reference voltage after generate error voltage, and then adjust
Save PWM duty cycle, systems stabilisation output voltage.The end COMP is connected by compensation resistance and compensating electric capacity with the end VFB.Switching tube 13
Grid source electrode between connect bleeder resistance.
As shown in figure 4, AD sampling system 3 includes that bidirectional current shunts monitor INA282 31, high-operational amplifier OPA227
32, AD sampling A/D chip ADS1118 33 and peripheral circuit.1,2,9,10 pins of AD sampling A/D chip ADS1118 33 respectively with
The part of interface P1.0-P1.3 of single-chip microcontroller is connected, the digital signal after transmission conversion.Bidirectional current shunts monitor INA282
The sampling resistor both end voltage of 1 output end of DC-DC booster system is amplified 50 times by 31, and the end IN- and the end IN+ pass through the respectively
One, the second current-limiting resistance and sampling resistor RsBoth ends are connected.The end REF1 and REF2 be systematically connected.OUT terminal is limited by third
Leakage resistance is connected to the end AIN0 of AD sampling A/D chip ADS1118 33.High-operational amplifier OPA227 32 is penetrated with peripheral circuit composition
Pole follower, the end V- be systematically connected.System output voltage is input to the end+In, the end-In and Output by divider resistance
End is connected to the end AIN1 of AD sampling A/D chip ADS1118 33 by the 4th current-limiting resistance after being shorted.AD sampling A/D chip ADS1118
33 end SCLK, DIN, DOUT, CS UCB0CLK, UCB0SIMO, UCB0SOMI with single-chip microcontroller MSP430F6638 41 respectively
It is connected with any I/O port, sampled voltage is exported as a part of feedback voltage to stablize, and sample rate current is to realize overcurrent
Defencive function.Bidirectional current shunts the end V+ and the AD sampling A/D chip of monitor INA282 31 and high-operational amplifier OPA227 32
The vdd terminal of ADS1118 33 is all connect with the output end of 3.3V power supply 53 in secondary power system 5.
As shown in Fig. 5 (a), 5 (b), control system includes single-chip microcontroller MSP430F6638 41, OLED display screen 42, matrix
Keyboard 43, DA conversion chip DAC8560 44 and the first operational amplifier OPA350 45, second operational amplifier OPA227 46.
OLED display screen 42 and matrix keyboard 43 are integrated on expansion board UIBOARD, and are connected to single-chip microcontroller MSP430F6638 41
On I/O port with interrupt function；DA conversion chip DAC8560 44 is connected to 41 digital signal of single-chip microcontroller MSP430F6638
Output end.Key value is obtained by row scanning method and is handled in control centre single-chip microcontroller MSP430F6638 41.DA converts core
The end DIN, SCLK, SYNC of piece DAC8560 44 is connect with any I/O port of single-chip microcontroller MSP430F6638 41 respectively, vdd terminal
It is connect with the 3.3V power supply 53 in secondary power system 5.First operational amplifier OPA350 45 constitutes emitter follower,
Output voltage of the DC-DC booster system 1 after partial pressure is isolated with late-class circuit.Second operational amplifier OPA227 46
And peripheral circuit constitutes adder, the end VOUT of DA conversion chip DAC8560 44 and the first operational amplifier OPA350's 45
Output end is connected with 46 positive input terminal of second operational amplifier OPA227 respectively, and second operational amplifier OPA227's 46 is defeated
Out it is feedback voltage, is connected with the Switching Power Supply control end chip UC3843 21VFB.First operational amplifier OPA350 45,
The positive power source terminal of second operational amplifier OPA227 46 all connects with 52 output end of 5V power supply in secondary power system 5
Connect, negative power end with systematically connect.Software section is control core with single-chip microcontroller MSP430F6638 41, control AD sampling,
DA conversion, reads key value, and control OLED real-time display.Control system 4 is digital feedback system, is pressed by interrupting to read
Key assignments, while reading converter data and obtaining sampled voltage and sample rate current.By sampled voltage compared with predeterminated voltage, into
And pid regulator parameters, when sampled voltage be greater than preset value when, reduce DA output, on the contrary it is then increase DA export, further stability series
System output voltage；When exporting electric current greater than 2.5A, I/O port exports high level, and control relay disconnects, and realizes overcurrent protection function
Can, and its recovery is controlled after 2s.
As shown in fig. 6, secondary power system 5 includes 12V power supply 51,5V power supply 52 and 3.3V power supply
53.12V power supply 51 directly connects after input direct-current source of stable pressure, is obtained using the BUCK circuit that decompression chip TPS5430 is built
To 12V DC power supply.5V power supply 52 connects in 51 rear class of 12V power supply, generates 5V direct current by linear stable 7805
Power supply.3V power supply 53 connects in 52 rear class of 5V power supply, generates 3V DC power supply by linear stable LM1117.
As shown in fig. 7, Over Current Protection System 6 includes triode 61, light emitting diode 62 and relay 63.Triode 61
Base stage is connect by resistance with any I/O port of single-chip microcontroller MSP430F6638 41 in control system 4, emitter with systematically connect
It connects, collector is connect with one end of 63 coil of 62 anode of diode and relay, the coil other end and 62 cathode of light emitting diode
Connection.The normal-closed end of relay 63 is connected to the output end in DC-DC booster system 1.When output electric current is more than over-current protection point
When, 41IO mouthfuls of output high level of single-chip microcontroller MSP430F6638, control relay disconnects output, realizes overcurrent protection, sends out simultaneously
Optical diode 62 is lighted, and expression system enters overcurrent protection state.
The workflow of the present embodiment switching power supply system are as follows: boosted by Boost booster system, tied simultaneously
Close software and hardware feedback stability output, when output voltage be less than desired value when increase duty cycle of switching, similarly, greater than when reduce duty
Than.Hard wired feed back controls the conducting and cut-off of MOSFET using mode PWM controlled chip UC3843, while by automatic
Feedforward compensation adjusts PWM wave duty ratio and realizes pressure stabilizing；Sampled voltage, electric current are sent into single-chip microcontroller by converter by software feedback
It is handled, then is fed back sampled voltage to booster circuit by DA conversion, while overcurrent protection function is realized according to sample rate current
Energy.System can keep output voltage adjustable in 30V~36V stepping by matrix keyboard with the precision of 1V；Voltage regulation factor is
0.14%；Load regulation is 0.17%；Noise ripple voltage peak-to-peak value is 30mV；System efficiency when exporting electric current and being 2A reaches
To 92.4%.
It should be understood that the part that this specification does not elaborate belongs to the prior art.
Although being described in conjunction with the accompanying specific embodiment of the present utility model above, those of ordinary skill in the art
It should be appreciated that these are merely examples, various deformation or modification can be made to these embodiments, it is practical without departing from this
Novel principle and essence.The scope of the utility model is only limited by the claims that follow.
Claims (7)
1. a kind of switching power supply system, including input direct-current source of stable pressure and system output voltage, characterized in that including DC-
DC booster system, UC3843 hard wired feed back system, AD sampling system, control system, secondary power system and Over Current Protection System；
DC-DC booster system is connected to after input direct-current source of stable pressure, and UC3843 hard wired feed back system is connect with DC-DC booster system,
AD sampling system welding system output voltage, control system are separately connected UC3843 hard wired feed back system, AD sampling system and overcurrent
Protection system, secondary power system are connected to after input direct-current source of stable pressure, are UC3843 hard wired feed back system, AD sampling system
System, control system and Over Current Protection System power supply, Over Current Protection System welding system output voltage.
2. switching power supply system as described in claim 1, characterized in that DC-DC booster system includes inductance, afterflow two
Pole pipe, switching tube CSD19536, filter capacitor, load and sampling resistor Rs, inductance connection after input direct-current source of stable pressure, continue
Flow Diode series in circuit, switching tube CSD19536, filter capacitor and load are in parallel in circuit.
3. switching power supply system as claimed in claim 2, characterized in that secondary power system include 12V power supply,
5V power supply and 3.3V power supply；After 12V power supply is connected to DC-DC booster system, by being depressured chip TPS5430
The BUCK circuit built obtains 12V DC power supply；5V power supply connects in 12V power supply rear class, passes through linear stable
7805 generate 5V DC power supply；3V power supply connects in 5V power supply rear class, and it is straight to generate 3V by linear stable LM1117
Galvanic electricity source.
4. switching power supply system as claimed in claim 3, characterized in that UC3843 hard wired feed back system includes switch electricity
Source controls chip UC3843 and peripheral circuit；Switching Power Supply controls the end VCC of chip UC3843 and 12V power supply output end connects
It connects, the end RT/CT and timing resistor, timing capacitor are connected to systematically, switching frequency is arranged；The end VREF passes through timing resistor
It is connected with the end RT/CT, provides charging current to timing capacitor；The end ISEN is connected to switching tube CSD19536 source current detection electricity
Resistance is used for protective switch pipe CSD19536；OUT terminal generates PWM by driving resistance to connect with the grid of switching tube CSD19536
Wave controls its conducting and shutdown, realizes system boosting；Feedback voltage is connected to the end VFB, is input to chip interior error amplifier,
Error voltage is generated after compared with internal 2.5V reference voltage, and then adjusts PWM duty cycle, systems stabilisation output voltage；COMP
End is connected by compensation resistance and compensating electric capacity with the end VFB；Bleeder resistance is connected between the grid source electrode of switching tube CSD19536.
5. switching power supply system as claimed in claim 4, characterized in that control system includes single-chip microcontroller
MSP430F6638, OLED display screen, matrix keyboard, DA conversion chip DAC8560 and the first operational amplifier OPA350, second
Operational amplifier OPA227；OLED display screen and matrix keyboard are integrated on expansion board UIBOARD, and are connected to monolithic equipment
Have on the I/O port of interrupt function, key value is obtained by row scanning method and is handled in control centre's single-chip microcontroller；DA conversion chip
The end DIN, SCLK, SYNC of DAC8560 is connect with any I/O port of single-chip microcontroller respectively, and vdd terminal is connect with 3.3V power supply；The
One operational amplifier OPA350 constitutes emitter follower, by output voltage and rear class electricity of the DC-DC booster system after partial pressure
Road is isolated；Second operational amplifier OPA227 and peripheral circuit constitute adder, the end VOUT of DA conversion chip DAC8560 and
The output end of first operational amplifier OPA350 is connected with second operational amplifier OPA227 positive input terminal respectively, and the second operation is put
The output of big device OPA227 is connected with the Switching Power Supply control end chip UC3843VFB；First operational amplifier OPA350, the second fortune
Calculate amplifier OPA227 positive power source terminal connect with 5V power supply, negative power end with systematically connect.
6. switching power supply system as claimed in claim 5, characterized in that AD sampling system includes that bidirectional current shunts prison
Visual organ INA282, high-operational amplifier OPA227 and AD sampling A/D chip ADS1118 and peripheral circuit；Bidirectional current shunts monitor
The end IN- and the end IN+ of INA282 passes through the first current-limiting resistance, the second current-limiting resistance and sampling resistor R respectivelysBoth ends are connected；
The end REF1 and REF2 be systematically connected；OUT terminal is connected to the AIN0 of AD sampling A/D chip ADS1118 by third current-limiting resistance
End；High-operational amplifier OPA227 and peripheral circuit constitute emitter follower, the end V- be systematically connected；System output voltage warp
It crosses divider resistance and is input to the end+In, the end-In is connected to AD sampling A/D chip by the 4th current-limiting resistance with after the short circuit of the end Output
The end AIN1 of ADS1118；The end SCLK, DIN, DOUT, CS of AD sampling A/D chip ADS1118 respectively with single-chip microcontroller MSP430F6638
UCB0CLK, UCB0SIMO, UCB0SOMI connected with any I/O port；Bidirectional current shunts monitor INA282 and high-precision is transported
The vdd terminal at the end V+ and AD sampling A/D chip ADS1118 of putting OPA227 is connect with the output end of 3.3V power supply.
7. switching power supply system as claimed in claim 5, characterized in that Over Current Protection System includes triode, shines
Diode and relay；The base stage of triode is connect by resistance with any I/O port of single-chip microcontroller MSP430F6638, emitter and
It systematically connects, collector is connect with one end of light-emitting diodes tube anode and relay coil, the coil other end and light-emitting diodes
Tube cathode connection；The normal-closed end of relay is connected to the output end in DC-DC booster system；When output electric current is more than overcurrent protection
When point, the I/O port of single-chip microcontroller MSP430F6638 exports high level, and control relay disconnects output, realizes overcurrent protection, send out simultaneously
Optical diode is lighted, and expression system enters overcurrent protection state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822211368.9U CN209151003U (en) | 2018-12-26 | 2018-12-26 | A kind of switching power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822211368.9U CN209151003U (en) | 2018-12-26 | 2018-12-26 | A kind of switching power supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209151003U true CN209151003U (en) | 2019-07-23 |
Family
ID=67290762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822211368.9U Expired - Fee Related CN209151003U (en) | 2018-12-26 | 2018-12-26 | A kind of switching power supply system |
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| Country | Link |
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| CN (1) | CN209151003U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113465594A (en) * | 2021-06-08 | 2021-10-01 | 北京自动化控制设备研究所 | Power supply for micro-electromechanical inertia measuring device and micro-electromechanical inertia measuring device |
-
2018
- 2018-12-26 CN CN201822211368.9U patent/CN209151003U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113465594A (en) * | 2021-06-08 | 2021-10-01 | 北京自动化控制设备研究所 | Power supply for micro-electromechanical inertia measuring device and micro-electromechanical inertia measuring device |
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