CN204465336U - A kind of low-power consumption bringing onto load DC power supply conversion and control module - Google Patents

A kind of low-power consumption bringing onto load DC power supply conversion and control module Download PDF

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Publication number
CN204465336U
CN204465336U CN201520092465.4U CN201520092465U CN204465336U CN 204465336 U CN204465336 U CN 204465336U CN 201520092465 U CN201520092465 U CN 201520092465U CN 204465336 U CN204465336 U CN 204465336U
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power
output
transfer module
module
power transfer
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CN201520092465.4U
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Chinese (zh)
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吴昕
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CETC 23 Research Institute
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CETC 23 Research Institute
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Abstract

The utility model discloses a kind of low-power consumption bringing onto load DC power supply conversion and control module, comprise DC/DC power transfer module, described DC/DC power transfer module comprises input, control end and output, the output of described DC/DC power transfer module is connected with load, also comprise photoelectrical coupler, be connected with between the output of described DC/DC power transfer module and the input of photoelectrical coupler and restart pulse-detecting circuit, between the control end of described DC/DC power transfer module and the output of photoelectrical coupler, be connected with polarity/amplitude pulses control circuit.The utility model is by restarting the recurrent pulse of pulse-detecting circuit monitoring output, what detect restarts pulse after photoelectric coupler isolation broadening, compared by polarity/amplitude pulses control circuit and export correct polarity and amplitude, thus greatly reduce the prime power needed for starting, realize the reliable startup of bringing onto load DC/DC power module under limited power supply condition.

Description

A kind of low-power consumption bringing onto load DC power supply conversion and control module
Technical field
The utility model relates to a kind of DC power supplier, particularly relates to a kind of low-power consumption bringing onto load DC power supply conversion and control module.
Background technology
DC/DC power module is various in style, complete in specifications, and compact conformation is widely used in the electronic device.Proper use of and play its usefulness to greatest extent, be the object of designer.Its course of work is divided into startup and two stages of normal work.Startup stage, DC/DC module self need consume larger energy, starts successfully, and himself power consumption can decline, and these energy provide by front stage circuits.In heavy load situation, start unsuccessfully, power transfer module needs accumulation of energy again to start, and most of energy that prime stores before loses.When input power is limited, the energy that in start-up course, prime provides can not meet the needs of DC/DC power module and load simultaneously.When starting unsuccessful, DC/DC power module internal circuit can be restarted repeatedly with fixed intervals T, and produce a width at output is the negative pulse of τ simultaneously, as shown in Figure 1.After start-up course occurs in the chance failure at every turn powered on and occur in the course of work.
Conventional front stage circuits of powering for DC/DC power module is made up of voltage source mostly, it contains intrinsic internal resistance and energy storage (filtering) element, when internal resistance is lower and energy-storage travelling wave tube capacity is larger, this kind of power supply has the larger margin of power, can be the transient state starting current that DC/DC power module provides enough.When prime is due to when internal resistance is comparatively large or energy-storage travelling wave tube is less or both have concurrently, its available finite energy, if now DC/DC power module connects comparatively heavy load, then DC/DC power module often can not reliably start.The conventional method of head it off has: 1, alleviate load; 2, the prime margin of power is increased; 3, disconnecting consumers, accesses after DC/DC power module starts again.These three kinds of methods have limitation in actual applications, therefore, are necessary to improve existing DC/DC power module.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of low-power consumption bringing onto load DC power supply conversion and control module, greatly can reduce the prime power needed for start-up course, realize the reliable startup of bringing onto load DC/DC power module under limited power supply condition, structure is simple, application easy to implement.
The utility model is solve the problems of the technologies described above the technical scheme adopted to be to provide a kind of low-power consumption bringing onto load DC power supply conversion and control module, comprise DC/DC power transfer module, described DC/DC power transfer module comprises input, control end and output, the output of described DC/DC power transfer module is connected with load, wherein, also comprise photoelectrical coupler, be connected with between the output of described DC/DC power transfer module and the input of photoelectrical coupler and restart pulse-detecting circuit, polarity/amplitude pulses control circuit is connected with between the control end of described DC/DC power transfer module and the output of photoelectrical coupler.
Above-mentioned low-power consumption bringing onto load DC power supply conversion and control module, wherein, describedly restart pulse-detecting circuit and comprise Schottky diode, the first resistance and the first electric capacity, one end of described Schottky diode is connected to the cathode output end of DC/DC power transfer module, the other end is connected to the first resistance and the first electric capacity, other one end of described first resistance is connected to the electrode input end of photoelectrical coupler, other one end of described first electric capacity connects ground, and the negative input of described photoelectrical coupler is connected with the cathode output end of power module.
Above-mentioned low-power consumption bringing onto load DC power supply conversion and control module, wherein, described polarity/amplitude pulses control circuit comprises the first voltage comparator, the control end of described DC/DC power transfer module is high level positive pulse control end, the negative input of described first voltage comparator is connected with reference level, the described electrode input end of the first voltage comparator is connected with the output of photoelectrical coupler and collector electrode, and the output of described first voltage comparator is connected with the control end of DC/DC power transfer module.
Above-mentioned low-power consumption bringing onto load DC power supply conversion and control module, wherein, described polarity/amplitude pulses control circuit comprises the first voltage comparator and the second voltage comparator, the control end of described DC/DC power transfer module is low level negative pulse control end, the negative input of described first voltage comparator is connected with reference level, the described electrode input end of the first voltage comparator is connected with the output of photoelectrical coupler and collector electrode, the output of described first voltage comparator is connected with the negative input of the second voltage comparator, the output of described second voltage comparator is connected with the control end of DC/DC power transfer module.
Above-mentioned low-power consumption bringing onto load DC power supply conversion and control module, wherein, the input voltage of described DC/DC power transfer module is 24V direct voltage, exports as 5V or 3.3V direct voltage.
The utility model contrast prior art has following beneficial effect: the low-power consumption bringing onto load DC power supply conversion and control module that the utility model provides, by restarting the recurrent pulse of pulse-detecting circuit monitoring output, what detect restarts pulse after photoelectric coupler isolation, broadening, compared by polarity/amplitude pulses control circuit and export correct polarity and amplitude, thus greatly reduce the prime power needed for starting, realize the reliable startup of bringing onto load DC/DC power module under limited power supply condition, structure is simple, application easy to implement.
Accompanying drawing explanation
Fig. 1 is that the startup of existing DC power supply conversion and control module exports pulse schematic diagram;
Fig. 2 is the utility model low-power consumption bringing onto load DC power supply conversion and control modular circuit schematic diagram;
Fig. 3 is that the startup of the utility model low-power consumption bringing onto load DC power supply conversion and control module exports pulse schematic diagram.
Embodiment
Below in conjunction with drawings and Examples, the utility model will be further described.
Fig. 2 is the utility model low-power consumption bringing onto load DC power supply conversion and control modular circuit schematic diagram.
Refer to Fig. 2, the low-power consumption bringing onto load DC power supply conversion and control module that the utility model provides comprises DC/DC power transfer module, described DC/DC power transfer module comprises input IN+ and IN-, control end CNT and output OUTPUT+ and OUTPUT-, the output of described DC/DC power transfer module is connected with load RLOAD, wherein, also comprise photoelectrical coupler 103, be connected with between the output of described DC/DC power transfer module and the input of photoelectrical coupler 103 and restart pulse-detecting circuit, polarity/amplitude pulses control circuit is connected with between the control end of described DC/DC power transfer module and the output of photoelectrical coupler 103.
In heavy load situation, autoboot is understood when power transfer module starts unsuccessfully or after failure vanishes, a negative pulse is produced at DC/DC power module outlet, the low-power consumption bringing onto load DC power supply conversion and control module that the utility model provides, utilizes and restarts the negative pulse that pulse-detecting circuit detects power module outlet.Of the present utility modelly restart pulse-detecting circuit and form primarily of a Schottky diode 101, first resistance 102, photoelectrical coupler 103 and the first electric capacity 104.One end of Schottky diode 101 is connected to the cathode output end OUTPUT+ of power module, the other end is connected to the first resistance 102 and the first electric capacity 104, other one end of first resistance 102 is connected to the electrode input end (1 pin) of photoelectrical coupler 103, and other one end of the first electric capacity 104 is connected to ground.The negative input (the 2nd pin) of photoelectrical coupler 103 is connected with the cathode output end of power module, output (the 3rd pin) (emitter) ground connection, output (the 4th pin) (collector electrode) is connected with the positive input terminal of the first comparator 111.Adopt and above-mentionedly restart pulse-detecting circuit, when power transfer module first time restarts, the electric charge that first electric capacity 104 stores is through the first resistance 102, photoelectrical coupler 103 forms discharge loop, now 4 pin of photoelectrical coupler 103 and 3 pin conductings, and electric capacity 108 discharges, the positive input terminal of the first comparator 111 is low level, be low level to its output, DC/DC power module control end (CNT) is high level, module no-output.Photoelectrical coupler 103 ON time ∝ RC ∝ (the first resistance 102) × (the first electric capacity 104), after first electric capacity 104 electric discharge terminates, photoelectrical coupler 103 output ends, the positive input terminal level of the first comparator 111 rises with time constant (resistance 107) × (electric capacity 108), when negative input end to the first comparator 111 is equal, first comparator 111 output reversion, realize pulse stretching, after the second comparator 114 polarity inversion, DC/DC power module control end is low level, realizes DC/DC power module and normally exports.In fig. 2, resistance 109 and resistance 110 provide reference level for the first comparator 111 and the second comparator 114.Voltage stabilizing didoe 105, electric capacity 106 and resistance 115 form accessory power supply, for reference level, the first comparator 111 and the second comparator 114 provide stable working power.
Figure 2 shows that the DC/DC power module using negative polarity (low level) to control, when the DC/DC power module using positive polarity (high level) to control, the second comparator 114 can be saved, the output of the first comparator 111 is connected to the control end of DC/DC power module.
The utility model discloses a kind of control end based on adjunct circuit control DC/DC power module (CNT pin), make it reliably start and the method worked.When DC/DC power module starts unsuccessful, can automatically restart, specific works process is as follows:
After DC/DC power module powers on, fast charging is completed to the first electric capacity 104.As this starts successfully, then this state keeps, and photoelectrical coupler 103 does not work all the time; As unsuccessful in this startup, then DC/DC power module outlet produces a negative pulse, and this pulse, through detecting part, light-coupled isolation, pulse stretching and polarity process, realizes the control to DC/DC power module, and waveform correlation as shown in Figure 3.
In normal state, should meet: Pi > P dC/DC+ P lOAD(1)
Wherein, the average input power continuously that provides for prime of Pi; P dC/DCfor the power of DC/DC power module autophage; P lOADfor the power that terminate load consumes; Startup stage, P dC/DCbe greater than when self normally working, as Pi finite capacity and terminate load is heavier, now may not meet (1) formula condition, cause start unsuccessful.Therefore, the utility model restarts pulse by detecting first, and control DC/DC power module control end, completes the startup of DC/DC power module self, and after sufficiently long time τ 1, output voltage is to terminate load.
τ 1 ∝ RC ∝ (resistance 107) × (electric capacity 108) (2)
In τ 1 stage, circuit completes two processes: prime energy-storage travelling wave tube completes charging; DC/DC power module self completes startup; To t1, export and be applied to terminate load, complete whole start-up course.
The utility model is limited and when connecting heavier terminate load in input power, by analyzing the course of work of DC/DC power module, and with the correlation of front stage, increase external control circuit, improve the load capacity of DC/DC power module and start reliability.The conventional input voltage of described DC/DC power transfer module is 24V direct voltage, exports as 5V or 3.3V direct voltage.By testing authentication, when input power Pi is 28W, when output voltage is respectively DC3.3V and DC5.0V, test comparison is as following table:
Test result shows: when input power is limited, and the utility model effectively can improve power output when DC/DC power module reliably starts.Meanwhile, through testing authentication, the utility model be equally applicable to direct voltage that input power is DC5V ~ DC48V, other band plus or minus control end, the DC/DC power module of isolation or non-isolated, and the DC/DC power module of other output voltage specifications.
Although the utility model discloses as above with preferred embodiment; so itself and be not used to limit the utility model; any those skilled in the art; not departing from spirit and scope of the present utility model; when doing a little amendment and perfect, therefore protection range of the present utility model is when being as the criterion of defining with claims.

Claims (5)

1. a low-power consumption bringing onto load DC power supply conversion and control module, comprise DC/DC power transfer module, described DC/DC power transfer module comprises input, control end and output, the output of described DC/DC power transfer module is connected with load, it is characterized in that, also comprise photoelectrical coupler (103), be connected with between the output of described DC/DC power transfer module and the input of photoelectrical coupler (103) and restart pulse-detecting circuit, polarity/amplitude pulses control circuit is connected with between the control end of described DC/DC power transfer module and the output of photoelectrical coupler (103).
2. low-power consumption bringing onto load DC power supply conversion and control module as claimed in claim 1, it is characterized in that, describedly restart pulse-detecting circuit and comprise Schottky diode (101), first resistance (102) and the first electric capacity (104), the positive pole of described Schottky diode (101) is connected to the cathode output end of DC/DC power transfer module, the other end is connected to the first resistance (102) and the first electric capacity (104), other one end of described first resistance (102) is connected to the electrode input end of photoelectrical coupler (103), other one end of described first electric capacity (104) connects ground, the negative input of described photoelectrical coupler (103) is connected with the cathode output end of power module.
3. low-power consumption bringing onto load DC power supply conversion and control module as claimed in claim 1, it is characterized in that, described polarity/amplitude pulses control circuit comprises the first voltage comparator (111), the control end of described DC/DC power transfer module is high level positive pulse control end, the negative input of described first voltage comparator (111) is connected with reference level, the electrode input end of described first voltage comparator (111) is connected with the output of photoelectrical coupler (103) and collector electrode, the output of described first voltage comparator (111) is connected with the control end of DC/DC power transfer module.
4. low-power consumption bringing onto load DC power supply conversion and control module as claimed in claim 1, it is characterized in that, described polarity/amplitude pulses control circuit comprises the first voltage comparator (111) and the second voltage comparator (114), the control end of described DC/DC power transfer module is low level negative pulse control end, the negative input of described first voltage comparator (111) is connected with reference level, the electrode input end of described first voltage comparator (111) is connected with the output of photoelectrical coupler (103) and collector electrode, the output of described first voltage comparator (111) is connected with the negative input of the second voltage comparator (114), the output of described second voltage comparator (114) is connected with the control end of DC/DC power transfer module.
5. the low-power consumption bringing onto load DC power supply conversion and control module as described in any one of Claims 1 to 4, it is characterized in that, the input voltage of described DC/DC power transfer module is 24V direct voltage, exports as 5V or 3.3V direct voltage.
CN201520092465.4U 2015-02-09 2015-02-09 A kind of low-power consumption bringing onto load DC power supply conversion and control module Withdrawn - After Issue CN204465336U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104682686A (en) * 2015-02-09 2015-06-03 中国电子科技集团公司第二十三研究所 Low-power-consumption on-load direct current power supply conversion control module

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104682686A (en) * 2015-02-09 2015-06-03 中国电子科技集团公司第二十三研究所 Low-power-consumption on-load direct current power supply conversion control module
CN104682686B (en) * 2015-02-09 2017-07-11 中国电子科技集团公司第二十三研究所 A kind of low-power consumption bringing onto load dc source shift control module

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