CN201766400U - High-power intelligent control circuit for switch power charger - Google Patents
High-power intelligent control circuit for switch power charger Download PDFInfo
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- CN201766400U CN201766400U CN2010201062996U CN201020106299U CN201766400U CN 201766400 U CN201766400 U CN 201766400U CN 2010201062996 U CN2010201062996 U CN 2010201062996U CN 201020106299 U CN201020106299 U CN 201020106299U CN 201766400 U CN201766400 U CN 201766400U
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Abstract
The utility model discloses a high-power intelligent control circuit for a switch power charger. A microcontroller is respectively connected with a constant voltage/constant current switch circuit, an analog-digital conversion circuit, a digital-analog conversion circuit, a protection circuit, a real-time clock circuit, a keyboard circuit and an LED circuit, a pulse width modulation module is respectively connected with a main power circuit, the constant voltage/constant current switching circuit, the digital-analog conversion circuit and the protection circuit, a voltage/current sampling circuit is respectively connected with the main power circuit and the constant voltage/constant current circuit switching circuit, and the constant voltage/constant current switching circuit is connected with the analog-digital conversion circuit. The high-power intelligent control circuit can realize constant-voltage and constant-current output to the switch power charger and can perform monitoring, timing and automatic switching to the switch power charger and simultaneously detect and display output voltage and current of the switch power charger synchronously, thereby realizing automatic charging and intelligent protection to a lead-acid battery pack; and in addition, the high-power intelligent control circuit is also provided with a PC (Personal Computer) interface circuit for realizing advanced management to the charger. The high-power intelligent control circuit has the advantage of intelligentization, low power consumption, high efficiency, practical and convenient performance and the like.
Description
Technical field the utility model belongs to technical field of integrated circuits, is specifically related to a kind of control circuit of high power intelligent Switching Power Supply charger.
The background technology Switching Power Supply is to utilize modern power electronics technology, to the output voltage stabilizing of power supply proposition or the requirement of stabilized current characteristic, utilizes feedback control circuit according to load, comes a kind of power supply of regulated output voltage or electric current by the control switch power tube.Switching Power Supply has obtained extensive use with advantages such as its volume are little, in light weight, efficient is high, output is stable.
At present, the charging to storage battery is exactly a kind of typical case's application of Switching Power Supply.Reasonably charge and play crucial effects tactful useful life effective prolongation storage battery.Conventional lead acid batteries charger charging control strategy is too simple, causes easily to overcharge, owe to fill, and shortens the useful life of battery, and adopts little electric current trickle charge mode more, causes the charging interval long, and efficient is low, uses very inconvenient.So-called digital switch power supply generally only has the numeral demonstration in fact on the China market, its inner control system still generally adopts simulation control, has shortcomings such as control circuit complexity, debugging very flexible, poor anti jamming capability, output voltage Current Regulation inconvenience.In addition, research to lead acid batteries charger and digital switch stabilized voltage power supply all is independently at present, the lead acid batteries charger that people use can only charge a battery, and switching power supply also has only the function of voltage stabilizing, does not possess the charge function to storage battery.
The summary of the invention the purpose of this utility model is to provide a kind of control circuit of high power intelligent Switching Power Supply charger; realization is to voltage stabilizing, the current stabilization output of switch power source charges machine; and it is monitored, regularly and automatically switch; sense switch power source charges machine output voltage, electric current and demonstration synchronously simultaneously, thus realization is to the automatic charging and the intelligent protection of lead-acid batteries.
For achieving the above object, the technical scheme taked of the utility model is:
A kind of control circuit of high power intelligent Switching Power Supply charger, it is characterized in that: it comprises main power circuit, power module, pulse width modulation module, voltage/current sample circuit, voltage stabilizing/current stabilization commutation circuit, analog to digital conversion circuit, micro controller, D/A converting circuit, protective circuit, real time clock circuit, keyboard circuit and led circuit, and wherein: micro controller is connected with led circuit with voltage stabilizing/current stabilization commutation circuit, analog to digital conversion circuit, D/A converting circuit, protective circuit, real time clock circuit, keyboard circuit respectively; Pulse width modulation module is connected with protective circuit with main power circuit, voltage stabilizing/current stabilization commutation circuit, D/A converting circuit respectively; The voltage/current sample circuit is connected with voltage stabilizing/current stabilization commutation circuit with main power circuit respectively; Voltage stabilizing/current stabilization commutation circuit is connected with analog to digital conversion circuit.
Described micro controller also is connected with the PC interface circuit.
The control circuit of the above-mentioned high power intelligent Switching Power Supply charger that the utility model provides, by the output voltage values that feeds back to sampling voltage value on the pulse width modulation module or current value and be provided with according to load request or the comparison of current value, regulate the output duty cycle of pulse width modulation module, thereby reach the purpose of voltage stabilizing or current stabilization output.Specifically, output requirement according to voltage stabilizing or current stabilization, by voltage/current sample circuit and voltage stabilizing/current stabilization commutation circuit output voltage values or current value are fed back to pulse width modulation module, compare with magnitude of voltage or current value, thereby the PWM that regulates pulse width modulation module exports by keyboard, micro controller, D/A converting circuit setting; Simultaneously, sampling voltage or electric current are sent into micro controller by analog to digital conversion circuit, show current output voltage value and current value in real time by led circuit.The utility model has been owing to adopted voltage stabilizing/current stabilization commutation circuit, when switching to voltage stabilizing or current stabilization wherein during a kind of output state, and under the situation of the current output state of locking, but still time sharing sampling output voltage and electric current, and show synchronously by led circuit.Owing to be provided with real time clock circuit, can show the operating time and set voltage stabilizing or the time of current stabilization output.Because the protective circuit that is provided with comprises current foldback circuit and power supply output short circuit protection circuit, when system's overcurrent or power supply output short-circuit, can protect automatically, wherein: current foldback circuit is by the comparison to the maximum current of output current and setting, determine whether turn-offing pulse width modulation module, to realize overcurrent protection; The power supply output short circuit protection circuit is by detecting power supply output short-circuit signal, automatically shutting down pulse width modulation module, to realize the power supply output short circuit protection.In addition,, designed the interface that communicates with PC, can realize higher management charger because the control circuit of this high power intelligent Switching Power Supply charger also is provided with the PC interface circuit.The control circuit of the high power intelligent Switching Power Supply charger that the utility model provides has characteristics such as intellectuality, low-power consumption, high efficiency, cost be low, practical and convenient.
Description of drawings Fig. 1 is a system architecture diagram of the present utility model
Fig. 2 a, Fig. 2 b are voltage sample circuit figure of the present utility model and current sampling circuit figure
Fig. 3 is voltage stabilizing of the present utility model/current stabilization commutation circuit figure
Fig. 4 is analog to digital conversion circuit figure of the present utility model
Fig. 5 is D/A converting circuit figure of the present utility model and current foldback circuit figure
Fig. 6 is power supply output short circuit protection circuit figure of the present utility model
Fig. 7 is real time clock circuit figure of the present utility model
The utility model is described in further detail below in conjunction with drawings and Examples for embodiment:
Fig. 1 is a system architecture diagram of the present utility model.As shown in Figure 1, among the embodiment of the control circuit of the high power intelligent Switching Power Supply charger that the utility model provides, comprise main power circuit, power module, pulse width modulation module, the voltage/current sample circuit, voltage stabilizing/current stabilization commutation circuit, analog to digital conversion circuit, micro controller, D/A converting circuit, protective circuit, real time clock circuit, keyboard circuit, led circuit and PC interface circuit, wherein: micro controller respectively with voltage stabilizing/current stabilization commutation circuit, analog to digital conversion circuit, D/A converting circuit, protective circuit, real time clock circuit, keyboard circuit is connected with led circuit; Pulse width modulation module is connected with protective circuit with main power circuit, voltage stabilizing/current stabilization commutation circuit, D/A converting circuit respectively; The voltage/current sample circuit is connected with voltage stabilizing/current stabilization commutation circuit with main power circuit respectively; Voltage stabilizing/current stabilization commutation circuit is connected with analog to digital conversion circuit.Need to prove: the PC interface circuit that links to each other with micro controller is to consider that the needs that charger is carried out higher management set up, and when not needing this function, above-mentioned PC interface circuit can omit.
Power module, pulse width modulation module, led circuit, keyboard circuit and PC interface circuit in this Switching Power Supply charger control circuit are prior art known in those skilled in the art.Generally speaking, micro controller is a single-chip microcomputer, and in the present embodiment, micro controller adopts the 89S52 single-chip microcomputer.Power module adopts special-purpose driving power JS158.Pulse width modulation module adopts pulse width modulator SG3525.LED shows it is to drive by Single-chip Controlling MAX7219 to realize.Keyboard adopts the 4*4 matrix keyboard, by the external interrupt mouth of 74L,S21 four inputs with door access single-chip microcomputer, adopts the interrupt mode programming to improve the response speed of single-chip microcomputer, reduces the consumption of system resource.The PC interface circuit adopts the level conversion between MAX232 realization PC and the single-chip microcomputer.
Fig. 2 a, Fig. 2 b are voltage sample circuit figure of the present utility model and current sampling circuit figure.Wherein, voltage sampling adopts the method for direct electric resistance partial pressure, by the direct voltage Vsa dividing potential drop of bleeder circuit that the first divider resistance R1, the second divider resistance R2 form, the voltage of met the requirements (satisfying analog-to-digital input requirement), i.e. sampling voltage Vso to exporting.The first divider resistance R1, one end is connected with output voltage V sa, and the other end is connected with the second divider resistance R2, filter capacitor C1, and is connected to sampling voltage output Vso; The second divider resistance other end is connected with the filter capacitor C1 other end, the common ground GND that inserts.
Current sampling circuit is made up of Hall current sensor and amplifying circuit, and the direct current Isa of output amplifies through amplifying circuit after Hall current sensor output again, obtains sampling current Iso.Adopt Hall element good, can also effectively avoid inserting loss current sampling precision height, the linearity.The Hall current sensor that adopts in the present embodiment is CHB-200S, and its rated current is 200A, measuring range is 0～± 300A; Amplifying circuit adopts amplifier OP07.Physical circuit connects as follows:
(1) "+" "-" of Hall current sensor part: CHB-200S end is its dual power supply end, "+" connection+15V power supply wherein, "-" connection-15V power supply; " M " end is its current output terminal, directly inserts in-phase input end 3 pin of the first amplifier F1.Measuring resistance Rm and filter capacitor C2 are attempted by one, and " M " end of an end and CHB-200S is connected other end ground connection GND.
(2) amplification circuits: the first amplifier F1 adopts dual power supply, and 4,7 pin are-5V and+5V power end, connect respectively-5V and+5V power supply, and filter capacitor C3, C4 ground connection GND by 0.1uF; 1,8 pin are its offset voltage adjustment end, and Rs1 links together by potentiometer, adjustable being connected to of Rs1+5V power supply; 2,3 pin are its differential input end, and wherein 2 pin are inverting input, by resistance R 3 ground connection GND; 3 pin are in-phase input end, directly insert " M " end of CHB-200S; 6 pin are its output, i.e. the sampling current of current sampling circuit output Iso is connected to inverting input 2 pin by potentiometer Rs2.4 pin of OP07 are undefined, so unsettled.
Figure 3 shows that voltage stabilizing of the present utility model/current stabilization commutation circuit figure.Micro controller MCU is by controlling the gating switching that the first double D trigger U1, four bidirectional analog switch U2 carry out voltage stabilizing, current stabilization, and the output behind the gating is as the feedback input signal of pulse width modulator; Simultaneously, when switching to voltage stabilizing or current stabilization by four bidirectional analog switch U2 wherein during a kind of output state, locking under the constant situation of current output state, the sampling of magnitude of voltage and current value shows in order to guarantee the output of voltage stabilizing output or current stabilization, also by controlling the timesharing gating switching that single eight path analoging switch U3 carry out voltage, electric current, the output behind the gating is as analog-to-digital input signal for micro controller MCU.Locking voltage stabilizing or current stabilization output are to finish by the clock end of controlling a double D trigger, and when being gated for wherein a kind of output of voltage stabilizing or current stabilization, micro controller can realize latching current output by the clock end access ground of analog switch with d type flip flop.Wherein: four bidirectional analog switches are selected CD4066B for use, and single eight path analoging switch are selected M74HC4051 for use, and double D trigger is selected CD4013 for use.Physical circuit connects as follows:
(2) voltage, the connection of electric current time sharing sampling: the implementation method that latchs output of voltage stabilizing or current stabilization and time sharing sampling voltage and current is: the P0 mouth of micro controller MCU is by the control first double D trigger U1, four bidirectional analog switch U2 realize voltage stabilizing or current stabilization output, the time sharing sampling of voltage and current when the P2 mouth of micro controller MCU is realized voltage stabilizing or current stabilization output by the single eight path analoging switch U3 of control, simultaneously, the timesharing gating control signal of single eight path analoging switch U3 is connected with the double switch control signal of four bidirectional analog switch U2 again, drag down the level of the input end of clock of the first double D trigger U1 by gating with this to this two-way ground signalling of four bidirectional analog switch U2, so just can realize the latching of current voltage stabilizing or current stabilization output, and can time sharing sampling voltage and current signal.Concrete connection is as follows:
The P21 mouth of micro controller MCU (21 pin) is connected with the gating control code B (10 pin) of single eight path analoging switch U3, as the control end SAV1 of voltage sample gating; The P20 mouth of micro controller MCU (22 pin) is connected with the gating control code A (11 pin) of single eight path analoging switch U3, as the control end SAI1 of current sample gating. Signal input part 14,15 pin of single eight path analoging switch U3 are connected with current sampling signal Iso with voltage sampling signal Vso respectively, as the input signal of voltage, electric current time sharing sampling.Signal output part 3 pin of single eight path analoging switch U3 are connected to analog to digital conversion circuit, as the input signal of analog to digital conversion circuit.10,11 pin of single eight path analoging switch U3 also are connected with the D road of four bidirectional analog switch U2, control end 12,6 pin of C way switch respectively, be connected with input end of clock 11 pin of the first double D trigger U1 after the C road of four bidirectional analog switch U2, the output of D way switch 9,10 pin link together, the C road of four bidirectional analog switch U2, the input of D way switch 8,11 pin connect back ground connection GND.
Other pin of (3) first double D trigger U1 connects: adopt single power supply, 14,7 pin are its power end, and 14 pin meet VCC, 7 pin ground connection GND; 8 pin and 10 pin are its set and reset terminal, and back ground connection links together; 1～6 pin is usefulness not, does not all unsettledly connect.
Other pin of (4) four bidirectional analog switch U2 connects: adopt single power supply, 14,7 pin are its power ends, and 14 pin meet VCC, 7 pin ground connection GND.
(5) other pin of single eight path analoging switch U3 connects: adopt single power supply, 16,8,7 pin are its power ends, and 16 pin meet VCC, 8,7 pin ground connection GND; Forbid holding INH (6 pin) ground connection GND; Gating control code C (9 pin) ground connection GND; Signal input part 13,12,1,5,2,4 pin are usefulness not all, so unsettledly do not connect.
Fig. 4 is analog to digital conversion circuit figure of the present utility model.The utility model adopts precision height, good in anti-interference performance, 4 half double integration A/D converter ICL7135 that price is low.In order to save the port resource of micro controller, present embodiment utilizes the BUSY end of ICL7135 to link to each other with the external interrupt port of micro controller, finishes the A/D conversion by the external interrupt and an inner timer of micro controller.The clock signal of the ALE/P port output of micro controller MCU is behind the second double D trigger U5, four frequency divisions, as the clock input signal of A/D converter U4.If micro controller MCU uses the 6M crystal oscillator, ALE/P is output as the square-wave signal of 1M, and then the clock through A/D converter U4 behind the second double D trigger U5, four frequency divisions is 250KHz.Physical circuit connects as follows:
(1) connection of A/D converter U4: adopt dual power supply, 1 pin connects-the 5V power supply, and 11 pin meet VCC, and 24 pin ground connection GND, 3 pin meet simulation ground AGND.Reference edge 2 pin meet VCC by potentiometer Rs3, resistance R 4, wherein: resistance R 4 one termination VCC, another termination potentiometer Rs3; 2 pin of potentiometer Rs3 is adjustable termination A/D converter U4, another termination simulation ground AGND.Integrator output terminal 4 pin meet simulation ground AGND by diode D1, resistance R 7, simultaneously, be connected to from zero end 5 pin by resistance R 5, capacitor C 7, capacitor C 8, be connected to buffer output terminal 6 pin by resistance R 5, capacitor C 7, resistance R 6, wherein: 4 pin of diode D1 one end and A/D converter U4 are connected, the other end is connected with resistance R 7, resistance R 7 another termination simulation ground ground AGND; 4 pin of resistance R 5 one ends and A/D converter U4 are connected, and the other end is connected with capacitor C 7; Capacitor C 7 other ends are connected with capacitor C 8, resistance R 6; The other end of capacitor C 8, resistance R 6 is connected to 5,6 pin of A/D converter U4 respectively.Reference capacitance negative terminal 7 pin are connected to reference capacitance anode 8 pin by capacitor C 9.Signal negative input end 9 pin meet simulation ground AGND, are connected to signal positive input terminal 10 pin by capacitor C 10 simultaneously; Signal positive input terminal 10 pin are connected to input signal to be converted by resistance R 8, i.e. the output signal of single eight path analoging switch U3.Busy condition output (BUSY) 21 pin are connected to external interrupt end (INT1) 13 pin of micro controller MCU.Input end of clock 22 pin are connected to first output, 1 pin of the second double D trigger U5.
The connection of (2) second double D trigger U5: adopt single power supply, 14 pin meet VCC, 7 pin ground connection GND; 6,8 pin are the set end, and 4,10 pin are reset terminal, all ground connection GND; First data input pin, 5 pin are connected to first reversed-phase output, 2 pin; Second data input pin, 9 pin are connected to second reversed-phase output, 12 pin; Second output, 13 pin are connected to first input end of clock, 3 pin; First output, 1 pin is connected to input end of clock 22 pin of A/D converter U4; The ALE/P that second clock input 11 pin are connected to micro controller MCU holds 30 pin.
Fig. 5 is D/A converting circuit figure of the present utility model and current foldback circuit figure.Two D/A converters of the utility model, a slice are used for and will carry out the D/A conversion by the voltage/current value of micro controller setting, and value after the conversion and the voltage/current value that feeds back compare, in order to realize voltage stabilizing, current stabilization; Another sheet is used for the comparison current limliting, will carry out the D/A conversion by the cut-off current of micro controller setting, when output current surpasses set point, turn-offs pulse width modulator immediately, to reach the purpose of overcurrent protection.The D/A converter adopts 12 high accuracy D/A chip MAX538.Physical circuit connects as follows:
(1) connection of D/A converting circuit: 8,5 pin of first, second D/A converter U6, U7 are power end, and 8 pin meet VCC, 5 pin ground connection.6 pin are reference input, are connected in the bleeder circuit of being made up of R9, Rs4, wherein: resistance R 9 one termination VCC, another termination potentiometer Rs4; Reference input 6 pin of first, second D/A converter of the adjustable termination of potentiometer Rs4 U6, U7, other end ground connection GND.After linking together, data input pin 1 pin of first, second D/A converter U6, U7 is connected to the P01 mouth (38 pin) of micro controller MCU; After linking together, input end of clock 2 pin are connected to the P02 mouth (37 pin) of micro controller MCU.Sheet choosing end 3 pin of the first D/A converter U6 are connected to the P03 mouth (36 pin) of micro controller MCU; Sheet choosing end 3 pin of the second D/A converter U7 are connected to the P04 mouth (35 pin) of micro controller MCU.Output 7 pin of the first D/A converter U6 are connected to pulse width modulator, as the homophase input of pulse width modulator.4 pin of first, second D/A converter U6, U7 need not, so unsettledly do not connect.
(2) connection of current foldback circuit: current foldback circuit is made up of the second D/A converter U7 and comparison amplifier F2; the maximum current that the sampling current Iso and the second D/A converter U7 set compares by comparison amplifier F2, relatively the shutoff control signal of back output pulse width modulator.Output 7 pin of the second D/A converter U7 are connected to inverting input 2 pin of comparison amplifier F2 by resistance R 11, as the input of setting cut-off current; Sampling current Iso is connected to in-phase input end 3 pin of comparison amplifier F2 by resistance R 12, as the input of sampling sample rate current value; 3 pin of comparison amplifier F2 are also by resistance R 10 ground connection GND simultaneously; Output 6 pin of comparison amplifier F2 feed back to inverting input 2 pin of comparison amplifier F2 by resistance R 13; Output 6 pin of comparison amplifier F2 are connected to pulse width modulator simultaneously.The first amplifier F1's is connected unanimity in the connection of other pin of comparison amplifier F2 and Fig. 2 b current sampling circuit.
Figure 6 shows that power supply output short circuit protection circuit figure of the present utility model.The power supply output short circuit protection circuit is made up of the second amplifier F3, driver F4 and optocoupler U9.When power supply output was short-circuited, sampling voltage Vso delivered to optocoupler U9 through the second amplifier F3, driver F4; Optocoupler work this moment exports signal the outside cut-off signals input of pulse width modulator to, makes it to quit work, to realize the automatic protection to whole system.Physical circuit is connected to:
(1) second amplifier F3 adopts OP07, and its in-phase input end 3 pin meet voltage sampling signal Vso, and the first amplifier F1's is connected unanimity in 1 pin of the driver connected F4 of output 6 pin, the connection of all the other pins and Fig. 2 b current sampling circuit.
(2) driver F4 adopts 74F07, and its 1 pin connects output 6 pin of the second amplifier F3, and another pin connects 2 pin of optocoupler U9.
(3) optocoupler U9 adopts TIL191, and its 1 pin connects+5V power supply VCC by resistance R 15,2 pin of the driver connected F4 of 2 pin; 3 pin meet simulation ground AGND by resistance R 17, are connected to pulse width modulator by diode D2 simultaneously; 4 pin connect+the 12V power supply by resistance R 16.
Fig. 7 is real time clock circuit figure of the present utility model.Adopt the DS1302 serial clock to come real-time demonstration time and regularly to output voltage stabilizing and current stabilization.DS1302 is the real time clock circuit of a kind of high-performance, low-power consumption, band RAM, it can to year, month, day, week, the time, minute, second carries out timing, has the leap year compensate function.Physical circuit is connected to: 1,8,4 pin of clock chip U10 are power end, and 1 pin is a main power source, meets VCC, and 8 pin are back-up source, by the battery ground connection GND of 3.6V, and 4 pin ground connection GND; 2 pin are connected to 3 pin by the crystal oscillator Y2 of 32.768KHz, and as its oscillation source input, simultaneously, crystal oscillator Y2 two ends are respectively by capacitor C 17, C18 ground connection GND; 5 pin are connected to the P24 mouth (25 pin) of micro controller MCU, reset/sheet selected control system signal as it; 6 pin are connected to the P07 mouth (32 pin) of micro controller MCU, as its I/O control signal; 7 pin are connected to the P25 mouth (26 pin) of micro controller MCU, as its clock control signal.
The above-mentioned high power intelligent Switching Power Supply charger control circuit that the utility model provides, its course of work is: system powers on, and finishes after the initialization to each parts, selects the voltage stabilizing or the current stabilization way of output by keyboard or PC; Afterwards again by keyboard or PC input voltage stabilizing/current stabilization value, the timing of voltage stabilizing/current stabilization; After beginning charging, LED shows current output voltage, current value and operating time; After voltage stabilizing/current stabilization time of setting arrived, system can automatically switch to current stabilization/voltage regulation way and work on, and finished up to charging.When because load variations or other reasons when causing overcurrent or output short-circuit, system can automatically shut down pulse width modulator SG3525, to realize the intelligent protection to charging system.
Above, describe embodiment of the present utility model with reference to the accompanying drawings.But those skilled in the art can understand, and under the situation that does not depart from spirit and scope of the present utility model, can also do various changes and replacement to embodiment of the present utility model.These changes and replacement all drop in the utility model claims institute restricted portion.
Claims (7)
1. the control circuit of a high power intelligent Switching Power Supply charger, it is characterized in that: it comprises main power circuit, power module, pulse width modulation module, voltage/current sample circuit, voltage stabilizing/current stabilization commutation circuit, analog to digital conversion circuit, micro controller, D/A converting circuit, protective circuit, real time clock circuit, keyboard circuit, led circuit and PC interface circuit, and wherein: micro controller is connected with led circuit with voltage stabilizing/current stabilization commutation circuit, analog to digital conversion circuit, D/A converting circuit, protective circuit, real time clock circuit, keyboard circuit respectively; Pulse width modulation module is connected with protective circuit with main power circuit, voltage stabilizing/current stabilization commutation circuit, D/A converting circuit respectively; The voltage/current sample circuit is connected with voltage stabilizing/current stabilization commutation circuit with main power circuit respectively; Voltage stabilizing/current stabilization commutation circuit is connected with analog to digital conversion circuit.
2. the control circuit of high power intelligent Switching Power Supply charger according to claim 1 is characterized in that: described micro controller also is connected with the PC interface circuit.
3. the control circuit of high power intelligent Switching Power Supply charger according to claim 1 and 2, it is characterized in that: described protective circuit comprises current foldback circuit and power supply output short circuit protection circuit, wherein: current foldback circuit is made up of second D/A converter (U7) and comparison amplifier (F2), sampling current (Iso) compares by comparison amplifier (F2) with the maximum current that second D/A converter (U7) is set, relatively the shutoff control signal of back output pulse width modulator; The power supply output short circuit protection circuit is made up of second amplifier (F3), driver (F4) and optocoupler (U9); sampling voltage (Vso) is delivered to optocoupler (U9) through second amplifier (F3), driver (F4), again by the shutoff control signal of optocoupler (U9) output pulse width modulator.
4. the control circuit of high power intelligent Switching Power Supply charger according to claim 1 and 2, it is characterized in that: described voltage sample circuit is realized by the bleeder circuit that first divider resistance (R1), second divider resistance (R2) constitute, the direct voltage (Vsa) of output obtains sampling voltage (Vso) through the bleeder circuit dividing potential drop; Described current sampling circuit is made up of Hall current sensor and amplifying circuit, and the direct current of output (Isa) amplifies through amplifying circuit after Hall current sensor output again, obtains sampling current (Iso).
5. the control circuit of high power intelligent Switching Power Supply charger according to claim 1 and 2, it is characterized in that: described voltage stabilizing/current stabilization commutation circuit is by micro controller (MCU) control first double D trigger (U1), the output voltage stabilizing of four bidirectional analog switch (U2) gatings or current stabilization signal, as the feedback input signal of pulse width modulator SG3525; By the time sharing sampling signal of single eight path analoging switch (U3) gating output voltage of micro controller (MCU) control and electric current, as analog-to-digital input signal.
6. the control circuit of high power intelligent Switching Power Supply charger according to claim 1 and 2, described analog to digital conversion circuit adopts A/D converter ICL7135, the BUSY end of A/D converter ICL7135 links to each other with the external interrupt port of micro controller, finishes the A/D conversion by the external interrupt and an inner timer of micro controller; Micro controller (MCU)
The clock signal of port output is behind second double D trigger (U5), four frequency divisions, as the clock input signal of A/D converter (U4).
7. the control circuit of high power intelligent Switching Power Supply charger according to claim 1 and 2 is characterized in that: described D/A converting circuit adopts D/A chip MAX538.
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| CN108832700A (en) * | 2018-08-23 | 2018-11-16 | 深圳源创智能照明有限公司 | The wake-up and dormant circuit of Hall switch |
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2010
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| WO2018166449A1 (en) * | 2017-03-14 | 2018-09-20 | 广东欧珀移动通信有限公司 | Short-circuit protection circuit, power adapter, and mobile terminal |
| CN107171389A (en) * | 2017-06-08 | 2017-09-15 | 深圳市沃特玛电池有限公司 | Battery charge control circuit |
| CN107221993A (en) * | 2017-07-27 | 2017-09-29 | 许文远 | A kind of charger control method and system |
| CN108832700A (en) * | 2018-08-23 | 2018-11-16 | 深圳源创智能照明有限公司 | The wake-up and dormant circuit of Hall switch |
| CN108832700B (en) * | 2018-08-23 | 2023-08-29 | 深圳源码智能照明有限公司 | Wake-up and dormancy circuit of Hall switch |
| CN109412242A (en) * | 2018-12-25 | 2019-03-01 | 荷贝克电源系统（溧阳）有限公司 | A kind of industrial robot industry circuit for charging machine control panel |
| CN109787486A (en) * | 2019-01-23 | 2019-05-21 | 东莞市韬科电子有限公司 | Small-volume large-power intelligent Matching power supply and its matching process and its radiator |
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