CN107733252A - A kind of regulator rectifier circuit for carrying temperature-compensating - Google Patents
A kind of regulator rectifier circuit for carrying temperature-compensating Download PDFInfo
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- CN107733252A CN107733252A CN201710864975.2A CN201710864975A CN107733252A CN 107733252 A CN107733252 A CN 107733252A CN 201710864975 A CN201710864975 A CN 201710864975A CN 107733252 A CN107733252 A CN 107733252A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a kind of regulator rectifier circuit for carrying temperature-compensating in wireless charging field,DC/DC power supply changeover devices including being connected to non-ideal voltage output terminal,Compensation high impedance feedback network is provided between non-ideal voltage source and DC/DC power supply changeover device,Compensation high impedance feedback network is by the resistance R5 that connects,Resistance R6,Schottky diode Dc is formed,The output cathode of a resistance R5 non-ideal voltage source of termination,Resistance R5 another terminating resistor R6 one end,The resistance R6 other end is grounded through Schottky diode Dc,Node between resistance R5 and resistance R6 connects the reference voltage point of DC/DC power supply changeover devices,The influence that Schottky diode Dc brings to compensation temperature change to non-ideal voltage source,This invention ensures that DC/DC power supply changeover devices realize that maximal efficiency is changed,Available in Internet of Things wireless charging.
Description
Technical field
The present invention relates to it is a kind of can wireless charging wearable device, more particularly to a kind of charging circuit of wearable device.
Background technology
With developing rapidly for wireless senser or biologic medical the wearable device application for supporting Internet of Things, for nothing
Line low-power equipment and the miniaturization that customizes, the demand of high-efficiency power converter are consequently increased.Especially for wireless energy
In amount transmission and RF energy acquisition applications, Efficient Conversion receives radio-frequency power, power attenuation is reduced as far as possible, to meet micro-control
Dc power needed for device or sensor processed.
For the demand of efficient energy conversion, the step-up/step-down type DC/DC power supplys with pressure point of maximum efficiency tracking function
Converter can provide wireless senser and the remarkable low-power performance needed for portable electric appts and power supply flexibility.One
As commercial DC/DC step-up/step-down type converters with maximal efficiency point tracking, such as Ling Li (Linear Technology)
The DC-DC power source conversion device LTC3129-1 chips of company, have ultralow quiescent current, can realize RF energy collection system
Energy efficient rate converts in system application.
Fig. 1 is the work of the DC-DC power source conversion device LTC3129-1 chips of Ling Li (Linear Technology) company
Schematic diagram.In general, being based on solar energy power generating application system, pressure point of maximum efficiency typically occurs in step-up/step-down type DC/
The input voltage of D/C power converter is equal to 75% or so of solar panel open-circuit voltage.The height that resistance R5 and R6 are formed
Impedance feedback divider resistance network, realize the partial pressure extraction to Output Voltage in Rectified Circuits, and the voltage for passing through chip internal
Comparator and current controller regulate and control to chip input current, and then realize the regulation and control to input voltage vin.R5 and R6 structures
Into high resistant anti feedback potential-divider network impedance superelevation, general M Ω ranks, thus flow through feedback potential-divider network electric current I3 surpass
Low, the power attenuation of resistance is ultralow on corresponding R5 and R6, so as to realize the peak power extraction to non-ideal voltage source,
Realize the purpose of maximal efficiency point tracking.
DC/DC power supply changeover devices with pressure point of maximum efficiency tracking function, such as Ling Li (Linear Technology) are public
Take charge of LTC3129-1 chips high impedance feedback loop divider is formed by R5 and R6 and realize to non-ideal voltage source output current I2 and defeated
Go out the regulation and control of voltage Vin (output voltage of non-ideal voltage source i.e. chip LTC3129-1 input voltage vin), so as to realize
Regulation and control to the load of non-ideal voltage source, to realize optimum load.
According to high impedance feedback loop divider, R5 and R6 are realized to the open-circuit voltage of non-ideal voltage source partial pressure by a certain percentage
Regulation and control, output voltage corresponding to the maximum power output of general non-ideal voltage source is non-ideal voltage source open-circuit voltage
75%, so as to realize the maximal efficiency extraction to non-ideal voltage source input power.Similar to solar energy power generating, radio frequency without
Rectification circuit in heat input transmission or energy acquisition application is also a kind of non-ideal voltage source.Correlative study shows, is based on
The maximum power transfer point of Schottky diode rectification circuit occurs corresponding under the conditions of load resistance is the input power
1.2~1.3 times of junction resistance Rj, thus for Internet of Things apply in wireless energy transfer and RF energy acquisition system in,
It is also required to by being realized with the DC/DC power supply changeover devices of pressure point of maximum efficiency tracking function to non-ideal voltage source dc power
Maximal efficiency extraction.
In Internet of Things or the wearable application of biologic medical, generally use is based on the realization pair of Schottky diode rectification circuit
Antenna or the energy that radio frequency to direct current are carried out to radio-frequency power of coil collection convert.However, change in extreme ambient temperature
Under the conditions of (- 55 DEG C~+85 DEG C), very big, the different environment temperature of the saturation current Is of Schottky diode temperature sensitivity
Under, the poor performance alienation change of Schottky diode is big under extreme temperature environment, identical defeated so as to cause under condition of different temperatures
Enter under power condition, the output voltage of corresponding rectification circuit changes therewith under maximum power transfer.
The content of the invention
It is an object of the invention to provide a kind of regulator rectifier circuit for carrying temperature-compensating, solves environment temperature in the prior art
The influence to regulator rectifier circuit is spent, ensures that regulator rectifier circuit maximal efficiency carries out energy conversion.
The object of the present invention is achieved like this：It is a kind of to carry the regulator rectifier circuit of temperature-compensating, including be connected to non-
The DC/DC power supply changeover devices of desired voltage source output terminal, it is high that compensation is provided between non-ideal voltage source and DC/DC power supply changeover device
Impedance feedback network, the output cathode of the non-ideal voltage source connect DC/DC power supply changeover device inputs, non-ideal voltage source
Output negative pole is grounded, the output cathode of a non-ideal voltage source of termination of the compensation high impedance feedback network, other end ground connection,
The compensation high impedance feedback network is made up of the resistance R5, resistance R6, Schottky diode Dc to connect, a resistance R5 termination
The output cathode of non-ideal voltage source, resistance R5 another terminating resistor R6 one end, the resistance R6 other end is through Schottky two
Pole pipe Dc is grounded, and the node between resistance R5 and resistance R6 connects the reference voltage point of DC/DC power supply changeover devices, the Schottky two
The influence that pole pipe Dc brings to compensation temperature change to non-ideal voltage source.
As the further restriction of the present invention, the junction resistance Rj of the Schottky diode Dc meets：
Wherein, IsoIt is the saturation current of Schottky diode for measuring to obtain at room temperature, TO(opened equal to 270 ° of K for room temperature
Er Wen), q is elementary charge constant, and k is Boltzmann constant, and T is absolute temperature, and ψ is barrier height, and n is that semiconductor is related often
Amount, I3To flow through the electric current of compensation high impedance feedback network.
As the further restriction of the present invention, pressure point of maximum efficiency corresponding to the DC/DC power supply changeover devices
Input voltage V 'IN(MPPC) meet：
As the further restriction of the present invention, resistance R5 and resistance R6 selects M Ω in the compensation high impedance feedback network
Rank.
As the further restriction of the present invention, the negative pole ground connection of the Schottky diode Dc, positive pole connecting resistance R6.
As the further restriction of the present invention, the plus earth of the Schottky diode Dc, negative pole connecting resistance R6.
As the further restriction of the present invention, the non-ideal voltage source includes two Schottky diodes of series aiding connection
D1, D2, the electrode points between D1 and D2 connect power source through electric capacity C1, and two Schottky diode D1, D2 outputs of series connection are terminated with
Filter capacitor C2.
As the further restriction of the present invention, the DC/DC power supply changeover devices are from Linear Technology companies
LTC3129-1DC/DC step-up/step-down type converters.
Compared with prior art, the beneficial effects of the present invention are the present invention in high impedance feedback network by increasing
One Schottky diode, so as to be adapted to by the Schottky diode non-ideal voltage source under extreme temperature environment by
Influence, and the influence is offset, so as to ensure that DC/DC power supply changeover devices realize that maximal efficiency is changed.The present invention can be used for
In the wireless charging of Internet of Things application, it can effectively solve the problem that environment extreme temperature influences to caused by equipment performance, realize temperature
The stability of the lower wireless energy transmission efficiency of change.
Brief description of the drawings
Fig. 1 is the fundamental diagram of DC-DC power source conversion device LTC3129-1 chips in the prior art.
Fig. 2 is LTC3129-1 chips schematic diagram in wireless energy transfer and RF acquisition application.
Fig. 3 is the circuit theory diagrams of embodiment 1 in the present invention.
Fig. 4 is the circuit theory diagrams of embodiment 2 in the present invention.
Embodiment
Embodiment 1
As shown in Figure 3 a kind of carries the regulator rectifier circuit of temperature-compensating, including is connected to non-ideal voltage source output
The DC/DC power supply changeover devices at end, non-ideal voltage source includes two Schottky diode D1, D2 of series aiding connection, between D1 and D2
Electrode points connect power source through electric capacity C1, two Schottky diode D1, D2 outputs of series connection are terminated with filter capacitor C2, DC/DC
Power supply changeover device selects the LTC3129-1DC/DC step-up/step-down type converters of Linear Technology companies, non-ideal electricity
Compensation high impedance feedback network is provided between potential source and DC/DC power supply changeover devices, the output cathode of non-ideal voltage source meets DC/DC
Power supply changeover device power input, the output negative pole ground connection of non-ideal voltage source, a termination of compensation high impedance feedback network are non-
The output cathode of ideal voltage source, other end ground connection, compensation high impedance feedback network is by resistance R5, resistance R6, Xiao Te for connecting
Based diode Dc is formed, and is compensated resistance R5 and resistance R6 in high impedance feedback network and select M Ω ranks, the one of resistance R5 terminate it is non-
The output cathode of ideal voltage source, resistance R5 another terminating resistor R6 one end, the resistance R6 other end is through the pole of Schottky two
Pipe Dc is grounded, and Schottky diode Dc negative pole ground connection, positive pole connecting resistance R6, the node between resistance R5 and resistance R6 meets DC/
The reference voltage point of D/C power converter, the shadow that Schottky diode Dc brings to compensation temperature change to non-ideal voltage source
Ring；
Schottky diode Dc junction resistance Rj meets：
Wherein, IsoIt is the saturation current of Schottky diode for measuring to obtain at room temperature, TO(opened equal to 270 ° of K for room temperature
Er Wen), q is elementary charge constant, and k is Boltzmann constant, and T is absolute temperature, and ψ is barrier height, and n is that semiconductor is related often
Amount, I3To flow through the electric current of compensation high impedance feedback network；
Pressure point of maximum efficiency input voltage V ' corresponding to DC/DC power supply changeover devicesIN(MPPC) meet：
Embodiment 2
As shown in figure 4, the difference of the embodiment and embodiment 1 is only：Schottky diode Dc plus earth, negative pole
Connecting resistance R6.
In order to which the present invention will be further described, the principle of the present invention is analyzed below.
According to relevant Schottky rectification circuit knowledge, to carrying out temperature simulation, input power based on HSMS286C voltage multiplies
18dBm, frequency 1MHz, temperature is from -55 degrees Celsius~+80 degrees Celsius, the electricity under corresponding maximal efficiency and maximal efficiency
Result is pressed, it is as shown in the table.
Temperature increase as seen from the above table, efficiency increase, and the output voltage under corresponding maximal efficiency is also increasing；For figure
2, the input voltage of corresponding chip meets under pressure point of maximum efficiency：VIN(MPPC)=1.175VFixed R5/R6
Ratio can only extract fixed Output Voltage in Rectified Circuits V from non-ideal voltage source rectification circuitIN(MPPC) (rectified current
The output voltage on road is the input voltage of LTC3129-1 chips), it can be difficult to meeting the pressure point of maximum efficiency under all temperature conditions
Extraction；Characteristic is varied with temperature in view of the junction resistance of Schottky diode, compensates resistance R5 in high impedance voltage feedback network
The ratio demand varied with temperature with resistance R6, the Schottky diode DC of addition junction resistance is defined to：
Wherein IoIt is Schottky diode Dc bias currents, in figure 3 equal to flowing through R5 and R6 in high resistance feedback network
Electric current I3, due to the high impedance feedback network resistance superelevation that R5 and R6 are formed, general M Ω ranks, corresponding electric current I3 is ultralow,
The saturation current I of the compensation Schottky diode of selections＞ ＞ I3, the I3 that is to say the bias current I of Schottky diodeo, institute
With corresponding junction resistance can using approximate representation asWhereinIs is with temperature
Rate of change be more thanRate is varied with temperature, so under zero offset or nearly zero bias condition, corresponding to Schottky diode
Reduction trend is presented with the rise of temperature by junction resistance Rj；So the input voltage vin of pressure point of maximum efficiency corresponding to Fig. 3 expires
Foot：
Input voltage V ' corresponding to pressure point of maximum efficiency based on Schottky diode voltage multiplieIN(MPPC) with temperature
Increase and the characteristics of increase, and the input impedance of the nearly zero offset Schottky diode Dc in high impedance feedback network
Reduce as temperature increases, by reasonable selection Schottky diode Dc junction resistance, realizeThe purpose of temperature-compensating.
The circuit structure that comparison diagram 3 is provided, under larger input power, input voltage vin is bigger, bias current I3
Become much larger therewith, bias current I3 influences to become big on the stable junction resistance for compensating Schottky diode, it is impossible to simple utilizationTo be calculated, it is necessary to accurately calculated by adding I3, computation complexity is added.Fig. 4 passes through change
The direction of diode can effectively solve the problem that this problem, according to Schottky diode relevant knowledge, under its reverse bias condition,
There is reverse leakage current to flow through, and reverse bias leakage current is equal to its saturation current Is before blanking voltage generation, soIt can be further simplified as in the case of reverse biasSo that temperature Schottky diode
Not biased electric current I3 influence.
With reference to specific implementation example of the invention, the present invention will be further described.
Step 1. selects specific Schottky diode as needed, and according to based on the Schottky diode rectification circuit
Within the temperature range of -55 DEG C~+85 DEG C (temperature range meets most of the circumstances situation), temperature interval is 20 DEG C, is swept
Retouch load change and obtain the relation of output voltage and efficiency, and find output voltage corresponding to pressure point of maximum efficiency, be designated as Vin1
Growth trend is presented with temperature in~Vin8, Vin.
Vin1~Vin8 that step 2. obtains according to step 1, computational load R5 and R6 ratio relation, i.e. R5/R6, the ratio
Value is the optimal resistance ratio for the high impedance feedback network for meeting temperature change needs, utilizes the resistance point of high resistant anti feedback partial pressure
With relation, the input voltage and resistance R5/R6 ratio relations of LTC3129-1 chips meet
With the increase of temperature, the output voltage V under maximal efficiency corresponding to rectification circuitIN(MPPC) (rectified current is increased
The output voltage on road corresponds to the input voltage of LTC3129-1 chips), the resistance ratio relation under above formula maximal efficiency is corresponded to, is needed
The compensation of temperature change is carried out to R5/R6；Schottky diode high-impedance network is based on by introducing, realizes high-impedance network
Middle resistance ratio is synchronous with temperature change, and then realizes the compensation to R5/R6 temperature changes.In view of temperature control element Schottky
Conducting resistance of the diode under zero offset or nearly zero bias condition meets
WhereinIs is more than with the change of temperatureSo in zero offset or
Under the nearly zero bias condition of person, junction resistance Rj corresponding to Schottky diode is reduced as temperature increases.So R6 can be passed through
Series connection Schottky diode realizes that R6 and Rj series resistances increase and the purpose of reduction with temperature.
Step 3. selects suitable Schottky diode, and generally selection is with the relatively low Schottky two of saturation current
Pole pipe is to realize the high resistant junction resistance under zero offset or nearly zero-bias conditions, and the saturation current is much larger than high resistant anti feedback electricity
The bias current I3 of resistance network, reasonable selection R6 and R5 resistance, and within the temperature range of -55 DEG C~+85 DEG C of temperature, temperature
Degree calculates R5/ [R6+Rj (T)] ratio at intervals of 20 DEG C, makes it on each temperature spot close to calculating institute corresponding to Vin1~Vin8
The R5/R6 optimum ratios obtained, and then realize the circuit design to the present invention.
The invention is not limited in above-described embodiment, on the basis of technical scheme disclosed by the invention, the skill of this area
Art personnel are according to disclosed technology contents, it is not necessary to which performing creative labour can makes one to some of which technical characteristic
A little to replace and deform, these are replaced and deformation is within the scope of the present invention.
Claims (8)
1. a kind of regulator rectifier circuit for carrying temperature-compensating, it is characterised in that including being connected to non-ideal voltage output terminal
DC/DC power supply changeover devices, compensation high impedance feedback network, institute are provided between non-ideal voltage source and DC/DC power supply changeover device
The output cathode for stating non-ideal voltage source meets DC/DC power supply changeover device inputs, the output negative pole ground connection of non-ideal voltage source, institute
State the output cathode of a non-ideal voltage source of termination of compensation high impedance feedback network, other end ground connection, the compensation high impedance
Feedback network is made up of the resistance R5, resistance R6, Schottky diode Dc to connect, a resistance R5 non-ideal voltage source of termination
Output cathode, resistance R5 another terminating resistor R6 one end, the resistance R6 other end are grounded through Schottky diode Dc, resistance
Node between R5 and resistance R6 connects the reference voltage point of DC/DC power supply changeover devices, and the Schottky diode Dc is compensating
The influence that temperature change is brought to non-ideal voltage source.
A kind of 2. regulator rectifier circuit for carrying temperature-compensating according to claim 1, it is characterised in that the Schottky
Diode Dc junction resistance Rj meets：
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Wherein, IsoIt is the saturation current of Schottky diode for measuring to obtain at room temperature, TOIt is equal to 270 ° of K (Kai Er for room temperature
Text), q is elementary charge constant, and k is Boltzmann constant, and T is absolute temperature, and ψ is barrier height, and n is that semiconductor is related often
Amount, I3To flow through the electric current of compensation high impedance feedback network.
A kind of 3. regulator rectifier circuit for carrying temperature-compensating according to claim 2, it is characterised in that the DC/DC
Pressure point of maximum efficiency input voltage V ' corresponding to power supply changeover deviceIN(MPPC) meet：
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4. a kind of regulator rectifier circuit for carrying temperature-compensating according to claim 1, it is characterised in that the compensation is high
Resistance R5 and resistance R6 selects M Ω ranks in Impedance feedback network.
A kind of 5. regulator rectifier circuit for carrying temperature-compensating according to claim 1, it is characterised in that the Schottky
Diode Dc negative pole ground connection, positive pole connecting resistance R6.
A kind of 6. regulator rectifier circuit for carrying temperature-compensating according to claim 1, it is characterised in that the Schottky
Diode Dc plus earth, negative pole connecting resistance R6.
7. a kind of regulator rectifier circuit for carrying temperature-compensating according to claim 1, it is characterised in that described non-ideal
Voltage source includes two Schottky diode D1, D2 of series aiding connection, and the electrode points between D1 and D2 connect power source through electric capacity C1, string
Two Schottky diode D1, D2 outputs of connection are terminated with filter capacitor C2.
A kind of 8. regulator rectifier circuit for carrying temperature-compensating according to claim 1, it is characterised in that the DC/DC
Power supply changeover device selects the LTC3129-1DC/DC step-up/step-down type converters of Linear Technology companies.
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| CN201710864975.2A CN107733252B (en) | 2017-09-22 | 2017-09-22 | Rectification voltage stabilizing circuit with temperature compensation function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710864975.2A CN107733252B (en) | 2017-09-22 | 2017-09-22 | Rectification voltage stabilizing circuit with temperature compensation function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114217130A (en) * | 2020-09-18 | 2022-03-22 | 意法半导体亚太私人有限公司 | High-precision low-temperature drift high-side current sensing hardware and method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206364810U (en) * | 2017-01-09 | 2017-07-28 | 成都正大科技有限公司 | A kind of radio-frequency power test device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206364810U (en) * | 2017-01-09 | 2017-07-28 | 成都正大科技有限公司 | A kind of radio-frequency power test device |
Non-Patent Citations (1)
| Title |
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| DAVA SALERNO: "具1.3μA超低静态电流的15V降压-升压型转换器,专为微功率应用和物联网而量身定制", 《中国集成电路》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114217130A (en) * | 2020-09-18 | 2022-03-22 | 意法半导体亚太私人有限公司 | High-precision low-temperature drift high-side current sensing hardware and method |
| CN114217130B (en) * | 2020-09-18 | 2023-11-03 | 意法半导体亚太私人有限公司 | High-precision low-temperature drift high-side current sensing hardware and method |
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