CN108933517A - The output voltage feed circuit and temperature-compensation circuit of switch converters - Google Patents
The output voltage feed circuit and temperature-compensation circuit of switch converters Download PDFInfo
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- CN108933517A CN108933517A CN201811035184.XA CN201811035184A CN108933517A CN 108933517 A CN108933517 A CN 108933517A CN 201811035184 A CN201811035184 A CN 201811035184A CN 108933517 A CN108933517 A CN 108933517A
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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
- H02M1/00—Details of apparatus for conversion
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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
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
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- Power Engineering (AREA)
- Control Of Electrical Variables (AREA)
Abstract
The present invention provides a kind of output voltage feed circuit of switch converters, including diode D5 and zener diode ZD1, the anode of diode D5 is connect with output voltage anode, output end of the anode of zener diode ZD1 as output voltage feed circuit, for connecting the FB foot of control chip, it further include temperature-compensation circuit, temperature-compensation circuit includes the compensation device complementary with the temperature variation characteristic of zener diode ZD1, temperature-compensation circuit seals between diode D5 and zener diode ZD1, i.e. one end of temperature-compensation circuit is connect with the cathode of diode D5, the other end of temperature-compensation circuit is connect with the cathode of zener diode ZD1.The present invention program has more stable voltage accuracy relative to traditional pressure stabilizing feed circuit under high temperature environment.
Description
Technical field
The present invention is suitable for the electronic circuit design field of switch converters.Due to being affected by temperature, voltage-stabiliser tube under high temperature
Stable voltage change, cause at high temperature switch converters output voltage there are problems that drift rise.For this phenomenon
This programme proposes a kind of temperature-compensation circuit to improve switch converters output voltage stability problem.
Background technique
Power supply industry development prospect is smaller towards volume at present, and integrated level is higher, and the lower direction of cost is fast-developing.Face
Market propose volume and integrated level under the background that more high-tech requires, does Master control chip using integrated IC and be increasingly becoming setting
Count the mainstream scheme of product.
Bring new challenge while highly integrated IC chip simplifies peripheral circuit to product design again.Such as feedback control loop
The problem of design and voltage accuracy, is especially prominent.The feedback model of chip can be divided into current mode feedback model and voltage-type is fed back
Two kinds of mode, wherein current mode feedback model comparison with voltage type feedback model has response speed faster and voltage accuracy is higher
Advantage.Therefore current mode feedback model IC is also often selected to make the control chip of product when selecting integrated chip.
The schematic diagram of the non-isolated switch converters of the typical case of application integration control IC as shown in figure 1.Wherein integrated control
ICU1 (hereinafter referred to as chip U1) internal high-voltage start-up circuit, the alternating voltage AC of Input voltage terminal Vin+ input when starting
The capacitor C1 charging external to vdd terminal by high voltage startup constant-current source from the end DRAIN of chip U1.Chip U1 is internally integrated switch
Metal-oxide-semiconductor, metal-oxide-semiconductor source electrode correspond to SOURCE foot, and drain corresponding DRAIN foot, control signal driving by PWM inside chip U1.Outside
Portion's circuit includes: input energy storage filter circuit, diode continuousing flow circuit, VDD power supply circuit and output voltage feed circuit.Its
Middle Vin+ is input to the anode of energy storage filter capacitor C4, and capacitor C4 cathode is connected to ground, capacitor C4 anode and chip interior MOS
Pipe drain electrode, which is connected, constitutes input energy storage filter circuit.The one end energy storage inductor L1 and 3 cathode of metal-oxide-semiconductor source electrode and sustained diode
It is connected, the other end is connected with the common node of output storage capacitor C5 anode and diode D5 anode, then passes through storage capacitor
The anode that the common node on C5 and ground is connected to sustained diode 3 constitutes the freewheeling circuit after metal-oxide-semiconductor shutdown.Chip VDD power supply
Circuit is connected by output node Vo+ connection switch diode D5 anode, D5 cathode with diode D1 anode, by D1 cathode to across
It connects and powers in the capacitor C1 of VDD foot and SOURCE foot.Output voltage feedback loop is by output plus terminal Vo+ through switching diode D5's
Anode is connected to zener diode ZD1 cathode, and the FB foot (i.e. Voltage Feedback foot) of chip U1 is entered by zener diode ZD1 anode
Do feedback control.
The feedback procedure of output voltage are as follows: when output voltage, which is established, is greater than voltage-stabiliser tube Uz (Uz=24V), voltage-stabiliser tube starts
Work flows into feedback electricity from FB foot to chip by output voltage stabilization to 24V, then by zener diode reverse breakdown current Iz
Stream adjusts output duty cycle to stabilize the output voltage.When output voltage fluctuates, changed by the electric current Iz of FB foot,
When output voltage increases, the electric current Iz of FB foot increases, and is controlled by internal logic and reduces duty ratio reduction output voltage, works as output
Voltage reduces, and the electric current Iz of FB foot reduces, and controls increase duty ratio by internal logic and increases output voltage.
And prior art is stabilized the output voltage using zener diode, provides the feedback loop design of feedback current
In have the following problems: directly result in product since the pressure stabilizing value of zener diode changes with the change of environment temperature and exist
Output voltage has variation by a relatively large margin compared to output of products voltage under room temperature under hot environment, and voltage accuracy can not obtain at all
To satisfaction.
Summary of the invention
For it is above-mentioned make pressure stabilizing feedback using zener diode when output voltage precision problem, it is proposed that it is a kind of can be to pressure stabilizing
Diode carries out temperature-compensating, the influence that compensation temperature generates voltage-stabiliser tube, to improve the switch of the stability of output voltage
Thus the output voltage feed circuit of converter, the present invention generate.
With this corresponding, it is a further object to provide a kind of output voltage feedback temperature compensation circuits, are pressure stabilizing
Pipe carries out temperature-compensating to influence of the compensation temperature to voltage-stabiliser tube, to improve output voltage stability.
In order to achieve the above-mentioned object of the invention, the present invention provides a kind of output voltage feed circuit of switch converters, including
The diode D5 and zener diode ZD1 of series connection, the anode of diode D5 are connect with output voltage anode, zener diode
Output end of the anode of ZD1 as output voltage feed circuit further includes temperature-compensating for connecting the FB foot of control chip
Circuit, temperature-compensation circuit include the compensation device complementary with the temperature variation characteristic of zener diode ZD1, temperature-compensation circuit
It seals between diode D5 and zener diode ZD1, i.e., one end of temperature-compensation circuit is connect with the cathode of diode D5, temperature
The other end of compensation circuit is connect with the cathode of zener diode ZD1.
Preferably, the compensation device of the temperature-compensation circuit is thermistor, the both ends of thermistor common electricity in parallel
Resistance, thermistor seal between diode D5 and zener diode ZD1, i.e., the cathode of one end of thermistor and diode D5 connects
It connects, the other end of thermistor is connect with the cathode of zener diode ZD1.
Preferably, the temperature-compensation circuit, when zener diode ZD1 is in positive temperature characterisitic, thermistor is subzero temperature
Spend the thermistor of coefficient.
Preferably, the temperature-compensation circuit, when zener diode ZD1 is in negative temperature characteristic, thermistor is positive temperature
Spend the thermistor of coefficient.
Preferably, the compensation device of the temperature-compensation circuit is diode D6, and diode D6 seals in diode D5 and steady
It presses between diode ZD1, i.e., the anode of diode D6 is connect with the cathode of diode D5, the cathode of diode D6 and two pole of pressure stabilizing
The cathode of pipe ZD1 connects, and does to the negative temperature characteristic by diode D6 forward conduction voltage drop to zener diode ZD1
Temperature-compensating.
Preferably, the compensation device of the temperature-compensation circuit be zener diode ZD2, two zener diode ZD1,
ZD2 be connected in series, i.e., the cathode of zener diode ZD2 is connect with the cathode of diode D5, the anode of zener diode ZD2 and
The cathode of zener diode ZD1 connects, to the series connection of two zener diodes by different temperatures characteristic, to realize
The mutual temperature-compensating of two zener diodes.
The present invention also provides a kind of temperature-compensation circuit of output voltage feed circuit, including zener diode ZD1, pressure stabilizings
Output end of the anode of diode ZD1 as output voltage feed circuit, for connect control chip FB foot, further include with surely
The compensation device of the temperature variation characteristic complementation of diode ZD1 is pressed, compensation device and zener diode ZD1 are connected in series, that is, mend
Input terminal of the one end as temperature-compensation circuit for repaying device, for being connect with the cathode of diode D5, to receive output voltage,
The other end of compensation device is connect with the cathode of zener diode ZD1.
Preferably, the compensation device is thermistor, and thermistor and zener diode ZD1 are connected in series, i.e. temperature-sensitive
The other end of input terminal of the one end of resistance as temperature-compensation circuit, thermistor is connect with the cathode of zener diode ZD1；
The both ends of thermistor conventional, electric-resistance also in parallel；Wherein, the selection type of thermistor by zener diode ZD1 working characteristics
It determines, i.e., when zener diode ZD1 is in positive temperature characterisitic, thermistor is the thermistor of negative temperature coefficient；In pressure stabilizing two
When pole pipe ZD1 is in negative temperature characteristic, thermistor is the thermistor of positive temperature coefficient.
Preferably, the compensation device is diode D6, diode D6 and zener diode ZD1 series connection, i.e. two poles
The cathode of input terminal of the anode of pipe D6 as temperature-compensation circuit, diode D6 is connect with the cathode of zener diode ZD1,
Temperature-compensating is done to zener diode ZD1 to the negative temperature characteristic by diode forward conduction voltage drop.
Preferably, the compensation device is zener diode ZD2, and two zener diodes ZD1, ZD2 are connected in series, i.e., surely
Press input terminal of the cathode of diode ZD2 as temperature-compensation circuit, the anode ZD2 and zener diode ZD1 of zener diode
Cathode connection, to the series connection by two zener diodes of different temperatures characteristic, to realize two two poles of pressure stabilizing
The mutual temperature-compensating of pipe.
Compared with prior art, the invention has the following beneficial effects:
1) this programme has more stable voltage accuracy for traditional pressure stabilizing feed circuit under high temperature environment.
2) this programme design principle is simple, and analysis is clear, easily designed, convenient for debugging.
3) this programme circuit structure is simple, and component number is few, the use of device is all general-purpose device, and use cost is low, obtains
It takes approach extensive, and device type is various, can adapt to the design requirement of different occasions.
4) this programme design principle is simple, reliably, as a result practical, effectively.
Detailed description of the invention
Fig. 1 is the circuit diagram for the non-isolated switch converters that application integration controls IC；
Fig. 2A is the VA characteristic curve figure of zener diode；
Fig. 2 B is the voltage regulator circuit schematic diagram of the output voltage feed circuit of the prior art；
Fig. 3 is the circuit diagram of the temperature-compensation circuit of output voltage feed circuit of the present invention；
Fig. 4 is the circuit diagram of the NTC resnstance transformer scheme of output voltage feed circuit of the present invention；
Fig. 5 is the circuit diagram of the PTC resistor compensation scheme of output voltage feed circuit of the present invention；
Fig. 6 is the circuit diagram of the series diode scheme of output voltage feed circuit of the present invention；
Fig. 7 is the circuit diagram of the positive negative temperature characteristic voltage-stabiliser tube tandem plan of output voltage feed circuit of the present invention.
Specific embodiment
Made improvement compared with the existing technology for a better understanding of the present invention, specific real to of the invention two kinds
Before the mode of applying is described in detail, first the prior art combination attached drawing that background technology part is previously mentioned is illustrated.
The VA characteristic curve of zener diode (can be also simply referred to as voltage-stabiliser tube below) is as shown in Figure 2 A.Zener diode is
A kind of special crystal diode, zener diode usually reversal connection application in circuit, work unlike general-purpose diode
In reverse breakdown area.By can be seen that the major parameter of voltage-stabiliser tube has voltage of voltage regulation Uz and reverse breakdown current Iz in Fig. 2A.Surely
The temperature characterisitic of pressure pipe is determined that usually positive temperature characterisitic is presented in its pressure stabilizing value in Uz > 6V by pressure stabilizing value Uz.In Uz < 4V its
Negative temperature characteristic is presented in pressure stabilizing value.Zener diode between 4V < Uz < 6V may be that positive temperature characterisitic is also likely to be negative temperature
Characteristic.
Existing common voltage regulator circuit connection type is as shown in Figure 2 B.As Uin > Uz, voltage-stabiliser tube is reversed breakdown, flows through anti-
To breakdown current Iz, Uo=Uz at this time.The shortcomings that this circuit, is: although it is steady to be able to maintain output voltage under normal temperature environment
It is fixed, but as the environment temperature raising used will lead to pressure stabilizing value Uz and reverse breakdown current Iz with varying with temperature.Environment
Temperature increases, and the voltage-stabiliser tube Uz of positive temperature characterisitic will be increased, the voltage-stabiliser tube Uz of negative temperature characteristic will be reduced.Just because of
The influence of voltage-stabiliser tube temperature characterisitic, leading to product, unstable variation occurs for output voltage under high temperature environment.
For the temperature characterisitic for improving voltage-stabiliser tube Uz, existing application technology is subjected to scheme optimization as shown in Figure 3.Improve rear
Case connection type are as follows: by thermistor it is in parallel with fixed carbon resister after be connected in series again with voltage-stabiliser tube.The voltage-stabiliser tube quilt as Uin > Uz
Reverse breakdown, at this time Uo=Iz*R//+Uz(R//For thermistor it is in parallel with fixed carbon resister after resistance value).Its principle is to utilize temperature-sensitive
Characteristic that resistance varies with temperature provides temperature-compensating for voltage-stabiliser tube.The zener diode of positive temperature coefficient, passes through NTC
Resistance (negative temperature coefficient resister) carries out temperature-compensating.The zener diode of negative temperature coefficient passes through PTC resistor (positive temperature system
Number resistance) carry out temperature-compensating.By thermistor it is in parallel with fixed carbon resister after be connected in series again with voltage-stabiliser tube, temperature-compensating think
Road is as follows: Uz increases the zener diode of positive temperature coefficient under high temperature environment, and the decline of NTC resistance causes and carbon film electricity
Resistance decrease after resistance is in parallel, Iz*R//reduction, i.e., the synchronous decline of the offset voltage at equivalent resistance both ends after parallel connection, therefore, total
Output voltage keeps stablizing.Uz reduces the zener diode of negative temperature coefficient under high temperature environment, and the increase of PTC resistor resistance value is drawn
Rise it is in parallel with fixed carbon resister after resistance value rise, Iz*R//increase, i.e., it is in parallel after the offset voltage at equivalent resistance both ends synchronize rising,
Therefore, total output voltage keeps stablizing.Temperature-compensating provided by final thermistor is offseted with the variation tendency of Uz
Disappear.It can be seen that doing temperature-compensating to zener diode by the temperature characterisitic using thermistor can control from above-mentioned principle
Output voltage Uo processed tends towards stability.
For convenience of description, the identical component code name of function is encoded by certain rule in following embodiment, wherein
First digit indicates that component code name, second digit indicate embodiment number, and such as voltage-stabiliser tube ZD11, first 1 is represented surely
Pressure pipe ZD1 (or being the first voltage-stabiliser tube), the second 1 voltage-stabiliser tube ZD1 being expressed as in one embodiment；Resistance R12 is indicated
It is the resistance R1 in second embodiment.It is noted that for convenience, may hereafter omit under certain this occasion wherein indicates
The second digit of embodiment number, and only it is retained as the first digit of component code name.Below in conjunction with attached drawing to this hair
Bright principle and embodiment is described in detail.
First embodiment
The temperature-compensation circuit of the output voltage feed circuit of the embodiment of the present invention one (is also referred to as negative using NTC resistance
The thermistor of temperature coefficient) temperature-compensating is done to positive temperature characterisitic voltage-stabiliser tube, as shown in Figure 4.The circuit connecting mode: Fig. 4
Common node of the middle C Node connectedness to resistance R11 and NTC resistance, resistance R11 and NTC resistance other end common node and pressure stabilizing
The cathode of diode ZD11 is connected, and is connected using zener diode ZD11 anode with D node.By the C of Fig. 4, circuit between D node
A in Fig. 1 is replaced, circuit between B node constitutes one parallel connection NTC resistance of the embodiment of the present invention and applies the entirety in switch converters
Scheme.Its principle is to do temperature-compensating to zener diode using the temperature characterisitic of thermistor to become to control output voltage Uo
In stabilization.Under 75 DEG C of environment of high temperature, Uz increases zener diode under high temperature environment, and the decline of NTC resistance causes and carbon
Resistance decrease Iz*R after film resistance is in parallel//Reduce, by the temperature-compensating of NTC resistance so that output voltage Uo is kept for one
More stable value.
Now by the test data to prior art sample and the present invention program sample come comparative illustration.Such as the following table 1 data
For the prior art voltage-stabiliser tube application circuit respectively under 25 DEG C of room temperature and 75 DEG C of environment of high temperature output of products voltage accuracy survey
Test result data.2 data of table are to use this hair under 25 DEG C of room temperature and 75 DEG C of environment of high temperature respectively using NTC resnstance transformer scheme
The test result data of output of products voltage accuracy when bright scheme.The comparison of test result data shows switch converters of the present invention
Compensation schemes improve it is obvious, it is truly feasible.
Table 1
Table 2
Second embodiment
The temperature-compensation circuit of the output voltage feed circuit of the embodiment of the present invention two (is also referred to as positive using PTC resistor
The thermistor of temperature coefficient) temperature-compensating is done to negative temperature characteristic voltage-stabiliser tube, as shown in Figure 5.The present embodiment circuit side connector
Formula: by the common node of E Node connectedness in Fig. 5 to resistance R12 and PTC resistor, resistance R12 and the public knot of the PTC resistor other end
Point is connected with the cathode of voltage-stabiliser tube ZD12, is connected using voltage-stabiliser tube ZD12 anode with F node.By the E of Fig. 5, circuit between F node
A in Fig. 1 is replaced, circuit between B node constitutes the integrated circuit scheme that the PTC resistor in parallel of embodiment two is applied to switch converters.
Embodiment principle is as follows: the zener diode ZD12 of negative temperature coefficient carries out temperature-compensating by PTC resistor.When environment temperature liter
Height, pressure stabilizing value decline, and PTC resistor resistance value with temperature rise and increase cause it is in parallel with fixed carbon resister after resistance value rising: Iz*R//
Increase, final thermistor provides temperature-compensating to voltage-stabiliser tube.
3rd embodiment
The embodiment of the present invention is third is that do temperature benefit to voltage-stabiliser tube using the negative temperature characteristic of diode forward conduction voltage drop
It repays, as shown in Fig. 6.The circuit connecting relation: G node is connected with the anode of switching diode D6, by the cathode of diode D6
It is connected with the cathode of voltage-stabiliser tube ZD13, the anode of voltage-stabiliser tube ZD13 is connected with node H.Using G in Fig. 6, the circuit between H node is replaced
A in Fig. 1 is changed, the circuit structure between B node obtains the integrated circuit schematic diagram that the embodiment of the present invention three is applied to switch converters.
Three principle of embodiment is as described below: since forward direction work diode itself has negative temperature characteristic, when the temperature increases diode
Conducting threshold voltage reduce.So the own temperature characteristic that can use diode provides temperature-compensating for voltage-stabiliser tube ZD13.
Voltage-stabiliser tube Uz increases when the temperature increases, and the conduction voltage drop Uth of diode reduces, to maintain node G, voltage keeps phase between H
To stabilization.Multiple positive diodes to work that can connect between node G and voltage-stabiliser tube ZD13 cathode in principle are voltage-stabiliser tube adjusting
Temperature-compensating under high temperature.
Fourth embodiment
The embodiment of the present invention is fourth is that the zener diode series connection using two different temperatures characteristics realizes that two voltage-stabiliser tubes are mutual
Temperature-compensating is mutually carried out, as shown in Figure 7.Since two voltage-stabiliser tubes have location swap, now it is positive temperature with voltage-stabiliser tube ZD14
The voltage-stabiliser tube (i.e. PTC-ZD) of characteristic, voltage-stabiliser tube ZD24 are to be illustrated for negative temperature characteristic voltage-stabiliser tube (i.e. NTC-ZD),
Its circuit connecting relation are as follows: I node is connected with the cathode of negative temperature characteristic voltage-stabiliser tube ZD24, by voltage-stabiliser tube ZD24 anode with
The cathode of the voltage-stabiliser tube ZD14 of positive temperature characterisitic is connected, then is connected by the anode of voltage-stabiliser tube ZD14 with J node.Using I in Fig. 7,
Circuit between J node replaces A in Fig. 1, and the circuit structure between B node obtains the entirety of the switch converters of the embodiment of the present invention four
Circuit diagram.Example IV principle is as described below: the zener diode due to pressure stabilizing value lower than 4V has negative temperature characteristic, surely
Zener diode of the pressure value greater than 6V has positive temperature characterisitic.Therefore the different temperature characterisitics that can use voltage-stabiliser tube are done each other
Temperature-compensating, the Uz decline of NTC-ZD voltage-stabiliser tube when the temperature rises, the Uz of PTC-ZD voltage-stabiliser tube rises, to realize node
Voltage between I, J keeps relative stability.
The present invention uses thermistor to do the compensation schemes of zener diode as preferred embodiment, by embodiment one with
The comparative analysis of prior art experimental result can intuitively find out that circuit arrangement has compared with the prior art under high temperature environment
There is higher output voltage precision.All there is reliable implementation from the point of view of two direction of principle and actual measurement.Provable hair
Bright improvement project has higher on adjusting prior art voltage-stabiliser tube voltage regulator circuit at high temperature problem of voltage accuracy deficiency
Feasibility and practicability.
Claims (10)
1. a kind of output voltage feed circuit of switch converters, diode D5 and zener diode ZD1 including series connection,
The anode of diode D5 is connect with output voltage anode, and the anode of zener diode ZD1 is as the defeated of output voltage feed circuit
Outlet, for connecting the FB foot of control chip, it is characterised in that: further include temperature-compensation circuit, temperature-compensation circuit include with
The compensation device of the temperature variation characteristic complementation of zener diode ZD1, temperature-compensation circuit seal in diode D5 and two pole of pressure stabilizing
Between pipe ZD1, i.e., one end of temperature-compensation circuit is connect with the cathode of diode D5, the other end of temperature-compensation circuit and pressure stabilizing
The cathode of diode ZD1 connects.
2. the output voltage feed circuit of switch converters according to claim 1, it is characterised in that: the temperature-compensating
The compensation device of circuit is thermistor, the both ends parallel connection conventional, electric-resistance of thermistor, and thermistor seals in diode D5 and steady
It presses between diode ZD1, i.e., one end of thermistor is connect with the cathode of diode D5, the other end of thermistor and pressure stabilizing two
The cathode of pole pipe ZD1 connects.
3. the output voltage feed circuit of switch converters according to claim 2, it is characterised in that: the temperature-compensating
Circuit, when zener diode ZD1 is in positive temperature characterisitic, thermistor is the thermistor of negative temperature coefficient.
4. the output voltage feed circuit of switch converters according to claim 2, it is characterised in that: the temperature-compensating
Circuit, when zener diode ZD1 is in negative temperature characteristic, thermistor is the thermistor of positive temperature coefficient.
5. the output voltage feed circuit of switch converters according to claim 1, it is characterised in that: the temperature-compensating
The compensation device of circuit is diode D6, and diode D6 is sealed between diode D5 and zener diode ZD1, i.e. diode D6's
Anode is connect with the cathode of diode D5, and the cathode of diode D6 is connect with the cathode of zener diode ZD1, to pass through two poles
The negative temperature characteristic of pipe D6 forward conduction voltage drop does temperature-compensating to zener diode ZD1.
6. the output voltage feed circuit of switch converters according to claim 1, it is characterised in that: the temperature-compensating
The compensation device of circuit is zener diode ZD2, and two zener diodes ZD1, ZD2 are connected in series, i.e. zener diode ZD2's
Cathode is connect with the cathode of diode D5, and the anode of zener diode ZD2 is connect with the cathode of zener diode ZD1, to logical
The series connection of two zener diodes of different temperatures characteristic is crossed, to realize the mutual temperature-compensating of two zener diodes.
7. a kind of temperature-compensation circuit of output voltage feed circuit, including zener diode ZD1, the sun of zener diode ZD1
Output end of the pole as output voltage feed circuit, for connecting the FB foot of control chip, it is characterised in that: further include and pressure stabilizing
The compensation device of the temperature variation characteristic complementation of diode ZD1, compensation device and zener diode ZD1 are connected in series, that is, compensate
Input terminal of the one end of device as temperature-compensation circuit, the other end for compensating device are connect with the cathode of zener diode ZD1.
8. the temperature-compensation circuit of output voltage feed circuit according to claim 7, it is characterised in that: the compensator
Part is thermistor, and thermistor and zener diode ZD1 are connected in series, i.e., one end of thermistor is as temperature-compensation circuit
Input terminal, the other end of thermistor connect with the cathode of zener diode ZD1；The both ends of thermistor common electricity also in parallel
Resistance；Wherein, when zener diode ZD1 is in positive temperature characterisitic, thermistor uses the thermistor of negative temperature coefficient；In pressure stabilizing
When diode ZD1 is in negative temperature characteristic, thermistor uses the thermistor of positive temperature coefficient.
9. the temperature-compensation circuit of output voltage feed circuit according to claim 7, it is characterised in that: the compensator
Part is diode D6, diode D6 and zener diode ZD1 series connection, i.e., the anode of diode D6 is as temperature-compensation circuit
Input terminal, the cathode of diode D6 connect with the cathode of zener diode ZD1, to pass through diode forward conduction voltage drop
Negative temperature characteristic to zener diode ZD1 does temperature-compensating.
10. the temperature-compensation circuit of output voltage feed circuit according to claim 7, it is characterised in that: the compensation
Device is zener diode ZD2, and two zener diodes ZD1, ZD2 are connected in series, i.e. the cathode of zener diode ZD2 is as temperature
The input terminal of compensation circuit is spent, the anode ZD2 of zener diode is connect with the cathode of zener diode ZD1, to pass through difference
The series connection of two zener diodes of temperature characterisitic, to realize the mutual temperature-compensating of two zener diodes.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110455319A (en) * | 2019-09-10 | 2019-11-15 | 无锡乐尔科技有限公司 | XMR Sensor Temperature Compensation circuit and compensation method |
| CN113268099A (en) * | 2021-04-27 | 2021-08-17 | 深圳市至正电子有限责任公司 | Solid-state direct-current voltage reference circuit |
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| CN102244464A (en) * | 2011-07-08 | 2011-11-16 | 西安天照伟成电气有限公司 | Power circuit |
| CN203071080U (en) * | 2013-01-09 | 2013-07-17 | 力神科技股份有限公司 | Diode component having temperature compensation |
| CN204217184U (en) * | 2014-12-03 | 2015-03-18 | 深圳市崧盛电子有限公司 | A kind of can the circuit of auto-compensation voltage stabilizing didoe temperature drift |
| CN105759890A (en) * | 2014-12-16 | 2016-07-13 | 中兴通讯股份有限公司 | Device and method for temperature compensation of APD (avalanche photon diode) bias voltage |
| CN206237163U (en) * | 2016-11-30 | 2017-06-09 | 广州由我科技股份有限公司 | A kind of voltage-stabilizing output circuit |
| CN207706033U (en) * | 2018-01-04 | 2018-08-07 | 亚荣源科技（深圳）有限公司 | Power supply circuit with temperature compensation function |
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| CN101297484A (en) * | 2005-10-25 | 2008-10-29 | 罗伯特·博世有限公司 | Temperature compensation in output stages |
| CN200950235Y (en) * | 2006-09-25 | 2007-09-19 | 深圳飞通光电子技术有限公司 | Temperature compensation bias circuit of avalanche photodiode |
| CN102244464A (en) * | 2011-07-08 | 2011-11-16 | 西安天照伟成电气有限公司 | Power circuit |
| CN203071080U (en) * | 2013-01-09 | 2013-07-17 | 力神科技股份有限公司 | Diode component having temperature compensation |
| CN204217184U (en) * | 2014-12-03 | 2015-03-18 | 深圳市崧盛电子有限公司 | A kind of can the circuit of auto-compensation voltage stabilizing didoe temperature drift |
| CN105759890A (en) * | 2014-12-16 | 2016-07-13 | 中兴通讯股份有限公司 | Device and method for temperature compensation of APD (avalanche photon diode) bias voltage |
| CN206237163U (en) * | 2016-11-30 | 2017-06-09 | 广州由我科技股份有限公司 | A kind of voltage-stabilizing output circuit |
| CN207706033U (en) * | 2018-01-04 | 2018-08-07 | 亚荣源科技（深圳）有限公司 | Power supply circuit with temperature compensation function |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110455319A (en) * | 2019-09-10 | 2019-11-15 | 无锡乐尔科技有限公司 | XMR Sensor Temperature Compensation circuit and compensation method |
| CN110455319B (en) * | 2019-09-10 | 2024-01-19 | 宁波希磁电子科技有限公司 | xMR sensor temperature compensation circuit and compensation method |
| CN113268099A (en) * | 2021-04-27 | 2021-08-17 | 深圳市至正电子有限责任公司 | Solid-state direct-current voltage reference circuit |
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Application publication date: 20181204 |
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