CN205304642U - Invariable pulse current's device is provided for load - Google Patents
Invariable pulse current's device is provided for load Download PDFInfo
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- CN205304642U CN205304642U CN201520971854.4U CN201520971854U CN205304642U CN 205304642 U CN205304642 U CN 205304642U CN 201520971854 U CN201520971854 U CN 201520971854U CN 205304642 U CN205304642 U CN 205304642U
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Abstract
The utility model relates to an invariable pulse current's device is provided for load, include with the direct -current input convert into pulse current offer the load DCDC switch converter and DCDC switch converter output pulse's rising edge does the load provides the low voltage difference linear voltage control unit of current compensation, the low voltage difference linear voltage control unit includes input and output, its input with the direct -current input is connected in order gaining the input, and its output is connected and is done in the load return circuit the load provides the current compensation, just magnitude of voltage on the output by the current current value decision in load return circuit. Implement the utility model discloses an invariable pulse current's device is provided for load has following beneficial effect: its consumption is less, easilier realize big power output, can realize preset pulse signal's tracking completely betterly.
Description
Technical field
This utility model relates to field of power supplies, more particularly, it relates to a kind of device that isopulse electric current is provided for load.
Background technology
In many applications, it is necessary to fixing to one or change load provides pulse current, and these pulse currents are generally the pulse current of constant duty ratio, and namely at electric current duration of existence, its electric current is constant. In order to realize this purpose, in the prior art, it is common that adopt a DCDC switch converters, direct current input is converted, by the control to this switch converters so that it is within a period of time, exports a specific magnitude of voltage; And within another a period of time, not output voltage; And so repeat, it is achieved pulse exports; Meanwhile, at the outfan of above-mentioned DCDC switch converters, use a linear voltage regulator that the output of above-mentioned DCDC switch converters is carried out voltage-regulation, thus realizing the stable output of electric current. But, in this case, owing to whole load current provides each through above-mentioned linear voltage regulator, and the power consumption of linear voltage regulator is relatively larger, so it has power consumption greatly, not easily realizes the defect of high-power electric current output.
Utility model content
The technical problems to be solved in the utility model is in that, greatly, not easily realizes the defect of high-power output for the above-mentioned power consumption of prior art, it is provided that a kind of power consumption is little, easily realize the device providing isopulse electric current for load of high-power output.
This utility model solves its technical problem and be the technical scheme is that a kind of device providing isopulse electric current for load of structure, is supplied to the DCDC switch converters of load including direct current input is converted to pulse current and exports the rising edge low-dropout linear voltage regulon for described load offer current compensation of pulse at described DCDC switch converters; Described low-dropout linear voltage regulon includes input and outfan, its input is connected to obtain input with the input of described direct current, its outfan is connected in load circuit provides current compensation for described load, and the magnitude of voltage on described outfan is determined by the present current value of described load circuit.
Further, described low-dropout linear voltage regulon includes the first control loop and adjusts pipe, described first controls loop outputs a control signal to the control end of described adjustment pipe, control the conducting state of described adjustment pipe, flow through the outfan that electric current is described low-dropout linear voltage regulon of described switching tube.
Further, described first controls loop includes two inputs, and an input is connected with the outfan of described adjustment pipe, and another input inputs the first control signal.
Further, described first control signal is by giving control signal and the current current sampling signal of described load circuit subtracts each other and obtains.
Further, described DCDC switch converters includes switching device and provides for described switching device drive signal second to control loop.
Further, described second controls loop includes two inputs, and an input is connected with the current flow sampled signal of described load circuit, and another input inputs described given control signal.
Further, described DCDC switch converters also includes rectification module and filtering energy-storage module, the signal that described switching device is exported by described rectification module carries out rectification, the signal that described rectification module exports is filtered and energy storage by described filtering energy-storage module, and provides described load by described rectification module output signal after treatment.
Further, the anode of described direct current input is connected to described load one end, and the other end of described load is connected with the input adjusting pipe of described low-dropout linear voltage regulon, and the outfan of described adjustment pipe passes through resistance eutral grounding; The negativing ending grounding of described direct current input, switching tube one end ground connection of described dcdc converter, the other end passes sequentially through described rectification module and filtering energy-storage module is connected to the other end of described load; The current flow sampling of described load circuit obtains with the junction of described filtering energy-storage module at the other end of described load.
Further, described rectification module includes an anode and connects the commutation diode of the outfan of described switching device, negative electrode connection described direct current input anode; Described filtering energy-storage module bag inductance and electric capacity, described inductance one end is connected with the anode of described commutation diode, and the negative pole of the other end of described inductance and described electric capacity is connected and connect to the other end of described load; Described capacitance cathode is connected to described direct current input anode.
Further, described DCDC AC converter adopts BUCK circuit.
Implement the device that isopulse electric current is provided of the present utility model for load, have the advantages that owing to DCDC switch change-over unit directly provides electric current for load, and the output of low-dropout linear voltage regulon is also connected on load circuit, provide current compensation for load. So, majority is provided by above-mentioned DCDC switch change-over unit by the electric current of load; And the voltage of low-dropout linear voltage regulon output is relevant to the current flow on load circuit, so it is only, when the electric current of DCDC switch converters output is inadequate, load is carried out current compensation, therefore only provide less load current. So, its power consumption is less, be easier to realize high-power output, can realize the perfect tracking of given pulse signal preferably.
Accompanying drawing explanation
Fig. 1 is that this utility model provides the structural representation of this device in the device embodiment of isopulse electric current for load;
Fig. 2 is the circuit diagram of this device in a kind of situation in described embodiment.
Detailed description of the invention
Below in conjunction with accompanying drawing, this utility model embodiment is described further.
As it is shown in figure 1, of the present utility model for load provide isopulse electric current device embodiment in this device include by direct current input be converted to pulse current be supplied to load DCDC switch converters and described DCDC switch converters export pulse rising edge be described load provide current compensation low-dropout linear voltage regulon; Described low-dropout linear voltage regulon includes input and outfan, its input is connected to obtain input with the input of described direct current, its outfan is connected in load circuit provides current compensation for described load, and the magnitude of voltage on described outfan is determined by the present current value of described load circuit. In other words, in the present embodiment, this device includes DCDC switch converters and low pressure difference linearity regulon the two part, above-mentioned DCDC switch converters and low pressure difference linearity regulon are obtained voltage by direct current input respectively, through respective conversion or process, respectively obtain its output curtage, then the output of above-mentioned two part is added in load. Wherein, DCDC switch converters is that direct current is entered through switching device, obtains pulse voltage, after this pulse voltage is filtered energy storage by inductance capacitance, it is provided that to above-mentioned load; And low pressure difference linearity regulon is obtained voltage by above-mentioned direct current input equally, the voltage of this acquirement is carried out linear voltage adjustment and obtains its output voltage, and this output voltage is supplied above-mentioned load equally, so that the response time at DCDC switch converters is relatively slow (such as, when being in rising edge of a pulse) time, provide current compensation to the loop at above-mentioned load place. In the present embodiment, for DCDC switch converters, a given pulse control signal can make it export pulse current; When sampled output current is lower than given pulse control signal, switching tube turns on, and output electric current increases; When sampled output current is higher than given pulse control signal, switching tube turns off, and output electric current reduces, and so repeatedly, when reaching stable state, output electric current will fluctuate up and down at given control electric current place; Similarly, the control signal of low pressure difference linearity regulon is the difference of given pulse control signal and sampled output current signal, and when the output electric current of linear regulation unit is lower than its difference, switching tube is open-minded, and output electric current increases; When the output off current HIGH of linear regulation unit is in its difference, switching tube turns off, and output electric current reduces, and when reaching stable state, output electric current will fluctuate up and down at given control electric current place, compensate the output electric current of DCDC switch converters with this. It is noted that in the present embodiment, pulse control signal given herein above is a sawtooth waveforms occurred according to certain cycle.
In the present embodiment, angle from above-mentioned DCDC switch converters and low pressure difference linearity regulon, owing to above-mentioned low pressure difference linearity regulon is directly obtained supply voltage by direct current input, it is directly output in load after processing (usually blood pressure lowering), it is mainly at the ascent stage of pulse, electric current in load circuit is played supplementary effect, so the electric current on low-dropout linear voltage regulon is also little, electric current in load circuit (providing because the electric current majority in load circuit is DCDC switch converters) is provided, so loss thereon is less.In other words, above-mentioned low pressure difference linearity regulon is only used to improve the characteristic of the rising edge of a pulse of DCDC switch converters and exist. So, from the angle of above-mentioned DCDC switch converters and low pressure difference linearity regulon, above-mentioned DCDC switch converters and low pressure difference linearity regulon are attempted by between the input of above-mentioned direct current and load.
Fig. 2 illustrates in the present embodiment in a kind of situation, the physical circuit figure of this device. in fig. 2, a kind of device that negative pulse current is provided specifically is showed. wherein, low-dropout linear voltage regulon in this device includes the first control loop and adjusts pipe, first controls loop outputs a control signal to the control end adjusting pipe, control the conducting state of described adjustment pipe, adjust the outfan that outfan is described low-dropout linear voltage regulon of pipe. first controls loop includes two inputs, and an input is connected with the outfan of described adjustment pipe, and another input inputs the first control signal. described first control signal is by giving control signal and the current current sampling signal of described load circuit subtracts each other and obtains. in the present embodiment, above-mentioned adjustment pipe is usually a device for power switching (such as transistor or metal-oxide-semiconductor), and the end that controls adjusting pipe is usually base stage or the grid of transistor. so, when change in voltage in the base stage or grid of a transistor or metal-oxide-semiconductor, between its collector and emitter or source electrode and drain electrode voltage drop can therewith change (this change includes saturation conduction, namely this device for power switching is on off state), the voltage drop namely consumed between this collector and emitter or source electrode and drain electrode changes, such change makes to occur in the change in voltage on above-mentioned adjustment pipe outfan, it is achieved thereby that control the purpose of the voltage being applied in load, make the electric current that load can be obtained by above-mentioned low-dropout linear voltage adjustment unit, it is achieved thereby that the current compensation of the rising edge of a pulse to the output of DCDC switch converters. it is worth mentioning that, in the present embodiment, first control signal is by an adder, the current sampling signal on given control signal and load circuit to be subtracted each other and obtain, wherein this given control signal is the setting value or the setup control signal that realize setting, in whole process, this value is constant.
And DCDC switch converters includes switching device and provides for this switching device drive signal second to control loop. Described second controls loop includes two inputs, and an input is connected with the current flow sampled signal of above-mentioned load circuit, and another input inputs described given control signal. Relatively after the two signal, obtain the output switch controlling signal to above-mentioned switching device. This switch control device is usually metal-oxide-semiconductor. In addition, in the present embodiment, above-mentioned DCDC switch converters also includes rectification module and filtering energy-storage module, the signal that described switching device is exported by described rectification module carries out rectification, the signal that described rectification module exports is filtered and energy storage by described filtering energy-storage module, and provides described load by described rectification module output signal after treatment.
In fig. 2, its concrete circuit connecting relation is as follows: the anode of direct current input is connected to load one end, and the other end of load is connected with the input adjusting pipe of low-dropout linear voltage regulon, and the outfan adjusting pipe passes through resistance eutral grounding; The negativing ending grounding of direct current input, switching tube one end ground connection of DCDC AC converter, the other end passes sequentially through rectification module and filtering energy-storage module is connected to the other end of load;The current flow sampling of load circuit obtains with the junction of described filtering energy-storage module at the other end of described load. In fig. 2, rectification module includes an anode and connects the commutation diode of the outfan of described switching device, negative electrode connection described direct current input anode; Filtering energy-storage module bag inductance and electric capacity, described inductance one end is connected with the anode of described commutation diode, and the other end of inductance and the negative pole of electric capacity are connected and connect to the other end of load; Capacitance cathode is connected to direct current input anode. By the connection of foregoing circuit, the circuit in Fig. 2 can provide negative current impulse for load preferably.
In fig. 2, by the angle of circuit topology, above-mentioned DCDC AC converter adopts BUCK circuit. Its operation principle is: first, control signal (load current sampled signal) that current sample the obtains reference signal as BUCK circuit output current will be carried out on load circuit, turn off by controlling the conducting of switching device, make the given control signal of output electric current energy perfect tracking of BUCK. Owing to BUCK Circuit responce speed is slow, it is difficult to perfect tracking, so introducing low-dropout linear voltage regulon to do the leading edge portion compensating BUCK circuit, by using the difference of control signal and the sampled output current of the BUCK circuit control signal as low-dropout linear voltage regulon circuit, by controlling to adjust the conducting state of pipe, make the output current following Setting signal of low-dropout linear voltage regulon. This two parts sum is the output electric current through overload.
Embodiment described above only have expressed several embodiments of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to this utility model the scope of the claims. It should be pointed out that, for the person of ordinary skill of the art, without departing from the concept of the premise utility, it is also possible to make some deformation and improvement, these broadly fall into protection domain of the present utility model. Therefore, the protection domain of this utility model patent should be as the criterion with claims.
Claims (10)
1. the device that isopulse electric current is provided for load, it is characterized in that, be supplied to the DCDC switch converters of load including direct current input being converted to pulse current and export the rising edge low-dropout linear voltage regulon for described load offer current compensation of pulse at described DCDC switch converters; Described low-dropout linear voltage regulon includes input and outfan, its input is connected to obtain input with the input of described direct current, its outfan is connected in load circuit provides current compensation for described load, and the magnitude of voltage on described outfan is determined by the present current value of described load circuit.
2. the device that isopulse electric current is provided for load according to claim 1, it is characterized in that, described low-dropout linear voltage regulon includes the first control loop and adjusts pipe, described first controls loop outputs a control signal to the control end of described adjustment pipe, control the conducting state of described adjustment pipe, flow through the outfan that electric current is described low-dropout linear voltage regulon of described adjustment pipe.
3. the device that isopulse electric current is provided for load according to claim 2, it is characterised in that described first controls loop includes two inputs, and an input is connected with the outfan of described adjustment pipe, and another input inputs the first control signal.
4. the device that isopulse electric current is provided for load according to claim 3, it is characterised in that described first control signal is by giving control signal and the current current sampling signal of described load circuit subtracts each other and obtains.
5. the device that isopulse electric current is provided for load according to claim 4, it is characterised in that described DCDC switch converters includes switching device and provides for described switching device drive signal second to control loop.
6. the device that isopulse electric current is provided for load according to claim 5, it is characterized in that, described second controls loop includes two inputs, and an input is connected with the current flow sampled signal of described load circuit, and another input inputs described given control signal.
7. the device that isopulse electric current is provided for load according to claim 6, it is characterized in that, described DCDC switch converters also includes rectification module and filtering energy-storage module, the signal that described switching device is exported by described rectification module carries out rectification, the signal that described rectification module exports is filtered and energy storage by described filtering energy-storage module, and provides described load by described rectification module output signal after treatment.
8. the device that isopulse electric current is provided for load according to claim 7, it is characterized in that, the anode of described direct current input is connected to described load one end, the other end of described load is connected with the input adjusting pipe of described low-dropout linear voltage regulon, and the outfan of described adjustment pipe passes through resistance eutral grounding; The negativing ending grounding of described direct current input, switching tube one end ground connection of described dcdc converter, the other end passes sequentially through described rectification module and filtering energy-storage module is connected to the other end of described load; The current flow sampling of described load circuit obtains with the junction of described filtering energy-storage module at the other end of described load.
9. the device that isopulse electric current is provided for load according to claim 8, it is characterised in that described rectification module includes an anode and connects the commutation diode of the outfan of described switching device, negative electrode connection described direct current input anode; Described filtering energy-storage module bag inductance and electric capacity, described inductance one end is connected with the anode of described commutation diode, and the negative pole of the other end of described inductance and described electric capacity is connected and connect to the other end of described load; Described capacitance cathode is connected to described direct current input anode.
10. the device that isopulse electric current is provided for load according to claim 8, it is characterised in that described dcdc converter adopts BUCK circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520971854.4U CN205304642U (en) | 2015-11-30 | 2015-11-30 | Invariable pulse current's device is provided for load |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520971854.4U CN205304642U (en) | 2015-11-30 | 2015-11-30 | Invariable pulse current's device is provided for load |
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| CN205304642U true CN205304642U (en) | 2016-06-08 |
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| CN201520971854.4U Active CN205304642U (en) | 2015-11-30 | 2015-11-30 | Invariable pulse current's device is provided for load |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109296995A (en) * | 2018-11-02 | 2019-02-01 | 华域视觉科技(上海)有限公司 | LED lamp mould group and LED light source driving circuit |
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2015
- 2015-11-30 CN CN201520971854.4U patent/CN205304642U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109296995A (en) * | 2018-11-02 | 2019-02-01 | 华域视觉科技(上海)有限公司 | LED lamp mould group and LED light source driving circuit |
| CN109296995B (en) * | 2018-11-02 | 2024-02-06 | 华域视觉科技(上海)有限公司 | LED lamp module and LED light source driving circuit |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: 518000 5th Floor, Building A5, Nanshan Zhiyuan, 1001 Xueyuan Avenue, Taoyuan Street, Nanshan District, Shenzhen City, Guangdong Province Patentee after: HAWAN ELECTRONICS Co.,Ltd. Address before: 518000 Shenzhen Nanshan District, Guangdong Province, Shekou East Coastal Road, No. 38 Complex Factory Continuation Building, 3 Buildings, 2 Floors Patentee before: HAWAN ELECTRONICS Co.,Ltd. |
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| CP02 | Change in the address of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 518000 5th Floor, Building A5, Nanshan Zhiyuan, 1001 Xueyuan Avenue, Taoyuan Street, Nanshan District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Haowen Electronics Co.,Ltd. Address before: 518000 5th Floor, Building A5, Nanshan Zhiyuan, 1001 Xueyuan Avenue, Taoyuan Street, Nanshan District, Shenzhen City, Guangdong Province Patentee before: HAWAN ELECTRONICS Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |