CN202679232U - Low temperature drift starting and under-voltage over-voltage protection reuse circuit, and switch power supply with application of the same - Google Patents
Low temperature drift starting and under-voltage over-voltage protection reuse circuit, and switch power supply with application of the same Download PDFInfo
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- CN202679232U CN202679232U CN 201220292636 CN201220292636U CN202679232U CN 202679232 U CN202679232 U CN 202679232U CN 201220292636 CN201220292636 CN 201220292636 CN 201220292636 U CN201220292636 U CN 201220292636U CN 202679232 U CN202679232 U CN 202679232U
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Abstract
The utility model relates to a low temperature drift starting and under-voltage over-voltage protection reuse circuit. The circuit is characterized by being composed of an over-voltage protection controller, a voltage detector, and a power-up and under-voltage protection controller which are successively in electrical connection. The utility model also provides a switch power supply with application of the above starting and under-voltage over-voltage protection reuse circuit. The circuit of the utility model helps to realize power-up starting control and under-voltage and over-voltage protection for a control circuit of the switch power supply, can adapt to a wide temperature difference environment, is low in design cost, and exhibits fine use values.
Description
Technical field
The utility model relates to a kind of Low Drift Temperature startup and under-voltage overvoltage protection multiplex circuit and uses its Switching Power Supply.
Background technology
The switch power converter that is widely used on the consumer electronics product generally includes two kinds of forms: interchange turns direct current (AC-DC) and DC-to-DC (DC-DC).The control circuit of switch power converter needs inner operating circuit is started after opening power, simultaneously also needs to finish input voltage and crosses and can automatically start under-voltage after low or too high or overvoltage protection control makes it avoid infringement.Because dc-dc converter user region is extensive; therefore objectively require these controls of switch power converter must possess the electrology characteristic of stable and consistent in large temperature range, a kind of Low Drift Temperature startup and under-voltage overvoltage protection multiplex circuit become the inevitable choice of these controls.
For achieving the above object; the temperature that the switch power converter that occurred has in recent years adopted new technology to promote inner startup and under-voltage over-voltage protecting function suppresses ability; this series products of domestic enterprise can adapt to-25 ~ 85 degrees centigrade difference variation; but still can't provide the product of steady operation under the high and cold temperature of high temperature; and its area of realizing circuit do not accomplish minimization, and cost is high.This premium quality product is by the monopolization of the international large factory of only a few, and their this series products has reached other adaptive capacity of-40 ~ 85 degrees centigrade of technical grade.The startup of using in the traditional switch power supply changeover device and under-voltage protecting circuit as shown in Figure 1, Fig. 1 has described a kind ofly to start and the power supply changeover device 10 of under-voltage protection technology based on tradition.One control circuit, 20 lotus roots are connected to a back coupling unit 15, and to produce a switching signal VSW, this switching signal is regulated the output signal VO of power supply changeover device 10, and these back coupling unit 15 lotus roots are connected to the output of power supply changeover device 10, to produce a feedback signal VFB.Wherein this switching signal VSW changes according to feedback signal VFB.The switching current IS of one transformer TR1 is converted into voltage signal VS via picking up flow resistor RS.This signal VS is controlled circuit 20 and is accepted and produce accordingly switching signal VSW.Among the figure, control circuit 20 comprises a reference voltage current circuit, a pulse width modulator.This pulse-width modulator lotus root is connected to this reference circuits response feedback signal VFB and signal VS produces a frequency switching signal VSW.If it is large to be somebody's turn to do startup and under-voltage protecting circuit temperature drift; very big-difference will appear in the start-up course of switch power converter under condition of different temperatures so; finally cause switch power converter different latitude area and season start-up course and the band of minimum input voltage to carry difference huge, job insecurity.
Summary of the invention
In view of this; the invention provides a kind of Low Drift Temperature starts and under-voltage overvoltage protection multiplex circuit; can be applicable to Switching Power Supply etc.; by reducing to greatest extent startup and under-voltage overvoltage protection multiplex circuit to the drift of temperature; realize the stable application of-50 ~ 120 ℃ of wide temperature ranges; really satisfy the application of high temperature extremely frigid zones, possess stronger region, general time-domain, and accomplish to realize that by circuit multiplexer area minimizes.
Above-mentioned purpose of the present utility model is achieved in that Low Drift Temperature starts and under-voltage overvoltage protection multiplex circuit, it is characterized in that, comprising:
One overvoltage protection controller;
One voltage detector, its first output is connected with the input of described overvoltage protection controller; And
One powers on and the under-voltage protection controller, and its input is connected with the second output of described voltage detector, and its first output is connected with the input of described voltage detector.
In the utility model one embodiment, described voltage detector comprises first and second multiple tube and first and second resistance and the first transistor; Described first and second multiple tube has the breakdown threshold voltage V of Low Drift Temperature
Z, when cathode potential is higher than anode V
ZAfter, this multiple tube conducting, otherwise cut-off; The negative electrode of described the first multiple tube connects supply lines; The anode of described the first multiple tube be connected the negative electrode of multiple tube and be connected with the source electrode of described the first transistor; The first end of the anode of described the second multiple tube, the first resistance is connected drain electrode and is connected with the second output of described voltage detector with the first transistor; The second end of described the first resistance be connected the first end of resistance and be connected with the first output of described voltage detector; The grid of described the first transistor is connected with the input of described voltage detector.
In the utility model one embodiment, described power on and the under-voltage protection controller comprises second and third transistor and third and fourth resistance and inverter; The grid of described transistor seconds powers on and the input of under-voltage protection controller is connected with described; The second end of the drain electrode of described transistor seconds, the 3rd resistance and the 3rd transistorized grid power on and the first output of under-voltage protection controller is connected with described; The second end ground connection of the source electrode of described transistor seconds and the 4th resistance; The first termination supply lines of the described the 3rd transistorized source electrode and the 3rd resistance; The first end of the described the 3rd transistorized drain electrode, the 4th resistance be connected the input of inverter and connect; Described inverter output powers on and the second output of under-voltage protection controller is connected with described.
In the utility model one embodiment, described overvoltage protection controller comprises fourth, fifth, six, seven, eight transistors and the 5th, six, seven resistance and a capacitor; The described the 4th transistorized grid is connected with the input of described overvoltage protection controller; Described fourth, fifth transistorized drain electrode is connected with described the 5th, six transistorized grids; The first end of the described the 6th transistorized drain electrode, the 5th resistance is connected with the first end of described capacitor with the 7th transistorized grid; The second end of described capacitor is connected with the first end of described the 6th resistor; The second end of described the 6th resistor, the 7th transistorized drain electrode and the 5th, six transistorized source electrodes connect supply lines; The first end of the described the 7th transistorized source electrode and the 7th resistance is connected with the described the 8th transistorized grid; The described the 8th transistorized drain electrode is connected with the output of described overvoltage protection controller; The second end ground connection of the described the 8th transistorized source electrode and the 5th, seven resistance.
In the utility model one embodiment, described Low Drift Temperature starts and under-voltage overvoltage protection multiplex circuit is to be integrated in the integrated package.
Another purpose of the utility model provides a kind of Switching Power Supply of using above-mentioned Low Drift Temperature startup and under-voltage overvoltage protection multiplex circuit; this power supply can be finished start-up course and under-voltage overvoltage protection is provided, and these functions all possess the Low Drift Temperature characteristic and realize that area minimizes feature.
This purpose adopts following scheme to realize: a kind of Switching Power Supply of application rights 1 described circuit; comprise transformer and a control circuit; it is characterized in that: described control circuit lotus root connects a back coupling unit of being located at the transformer output; regulate the pulse duration of described transformer to produce a switching signal, described control circuit is started by described Low Drift Temperature and under-voltage overvoltage protection multiplex circuit and pulse width modulator lotus root connect and form.
In the utility model one embodiment, described control circuit is one to be started and under-voltage overvoltage protection multiplex circuit and pulse width modulator lotus root connect the integrated circuit that forms by described Low Drift Temperature.
The Digital Analog Hybrid Circuits that adopts the utility model realizes that Low Drift Temperature starts and under-voltage over-voltage protecting function.Circuit is simple, and area is little, and can be designed to integrated circuit, and cost is low, has preferably market value.
Description of drawings
Fig. 1 is based on the power supply changeover device of tradition startup and under-voltage protection technology.
Fig. 2 is the schematic block circuit diagram of the startup of the utility model Low Drift Temperature and under-voltage overvoltage protection multiplex circuit.
Fig. 3 is the circuit connection diagram of the startup of the utility model Low Drift Temperature and under-voltage overvoltage protection multiplex circuit.
Fig. 4 is the circuit connection diagram of other several examples of voltage detector among Fig. 3.
Fig. 5 is output enable logical signal EN among Fig. 3
UVLOCurve chart to supply power voltage VCC
Fig. 6 is clamped current signal I among Fig. 3
CLAMPCurve chart to supply power voltage VCC
Fig. 7 is output enable logical signal V among Fig. 3
OvpCurve chart to supply power voltage VCC
Fig. 8 is based on the circuit theory schematic block diagram of the power supply changeover device of Low Drift Temperature startup and under-voltage overvoltage protection multiplex circuit.
The primary clustering symbol description:
20,300: control circuit
Q1: transistor
TR1: transformer
D1: diode
M1 ~ M8: transistor
15,104: the back coupling unit
R
S, R
1~ R
7: resistor
C1, CT: capacitor
Z
1, Z
2: multiple tube
1000: Low Drift Temperature starts and under-voltage overvoltage protection multiplex circuit
1001: voltage detector
2000: pulse-width modulator
CTRL: feedback and hold
VCC: supply power voltage input
V
CC: supply power voltage
SW: switch output
V
CTRL: feedback voltage
V
IN: input voltage
V
O: output voltage
V
S: inspection stream voltage
I
S: switch current
I
CLAMP: clamped electric current
V
SW: switching signal
V
a, V
b, V
c: detect voltage
EN, EN
UVLO, EN
Ovp: the enable logic signal
V
CCMIN, V
CCON, V
1, V
Ovp: voltage threshold
I
CLP: current threshold.
Embodiment
Below in conjunction with drawings and Examples the present invention is described further.
The utility model provides a kind of Low Drift Temperature to start and under-voltage overvoltage multiplex circuit, it is characterized in that: powered on and the under-voltage protection controller is electrically connected successively and forms by an overvoltage protection controller, a voltage detector.Concrete, referring to Fig. 3, Fig. 3 is the Low Drift Temperature startup of the present embodiment and the circuit connection diagram of under-voltage overvoltage protection multiplex circuit, among the figure, described voltage detector the first output is connected with the input of described overvoltage protection controller; Described power on and under-voltage protection controller input is connected with the second output of described voltage detector; Described power on and under-voltage protection controller the first output is connected with the input of described voltage detector.
Described voltage detector is comprised of according to electric connection first and second multiple tube and first and second resistance and the first transistor; Described first and second multiple tube has the breakdown threshold voltage V of Low Drift Temperature
Z, when cathode potential is higher than anode V
ZAfter, this multiple tube conducting, otherwise cut-off; Described power on and the under-voltage protection controller is comprised of according to electric connection second and third transistor and third and fourth resistance and inverter; Described overvoltage protection controller is comprised of according to electric connection fourth, fifth, six, seven, eight transistors and the 5th, six, seven resistance and a capacitor.
Low Drift Temperature described in the utility model starts and under-voltage overvoltage protection multiplex circuit can be integrated in the integrated package, can greatly reduce volume and the cost of circuit.
In order to allow those skilled in the art better understand the utility model, below our combined circuit operation principle of the present utility model is further described:
Please continue referring to Fig. 3, Low Drift Temperature starts and under-voltage overvoltage protection multiplex circuit 1000 is powered on by an overvoltage protection controller, a voltage detector, one and the under-voltage protection controller forms according to electric connection.Voltage detector is by transistor M
1, resistance R
1~ R
2With multiple tube Z
1~ Z
2Form.Power on and the under-voltage protection controller by transistor M
2~ M
3, resistance R
3~ R
4Form with inverter.The overvoltage protection controller is by transistor M
5~ M
8, resistance R
5~ R
7Form with capacitor C T.V wherein
cAnd V
bBeing respectively overvoltage protection detects voltage and powers on and under-voltage protection detection voltage V
aBe clamped current detection voltage, I
CLAMPBe clamped electric current, EN
UVLOAnd EN
OVPBe under-voltage protection output logic control signal and overvoltage protection logic control signal, EN
CTLBe logic control signal.
The startup that this temperature susceplibility is low and under-voltage overvoltage protection multiplex circuit detailed operation operation principle are as follows:
Voltage V
OVPV
1V
CCONV
CCMIN, to power supply V
CCFrom 0 to V
OVP0 one-period job analysis occurs to return in overvoltage protection again:
V when 1. initial
CCVoltage is 0, multiple tube Z
1, Z
2Turn-off V
b=0, M
2And M
3Turn-off EN
CTL=" 1 " causes M
1Turn-off EN
UVLO=" 1 " under-voltage protection enables; V
c=0 causes M
4~ M
7Turn-off I
CLAMP=0 and then cause M
8Turn-off EN
OVP=" 1 " overload protection does not enable;
2. work as V
CCVoltage rises and surpasses V
CCONAnd less than V
1The time, V
1V
CCV
CCON=2V
THZ+ V
THN(wherein, V
THNBe N-type transistor turns threshold voltage, V
THZBe multiple tube Z
1, Z
2Single pipe on state threshold voltage) cause multiple tube Z
1, Z
2Conducting, V
b=V
CC-2V
THZV
THN, M
2And M
3Conducting, EN
CTL=" 0 " causes M
1Conducting short circuit Z
2, Z so
2Turn-off EN
UVLO=" 0 " under-voltage protection does not enable, and the circuit start power up is finished; V
c＜V
THNCause M
4~ M
7Still turn-off I
CLAMP=0 and then cause M
8Turn-off EN
OVP=" 1 " overload protection does not enable.
3. work as V
CCVoltage continues to rise above V
1And less than V
OVPThe time, Z
1Conducting, Z
2Turn-off V
bV
THN, M
2And M
3Conducting, EN
CTL=" 0 " causes M
1Conducting short circuit Z
2, Z so
2Turn-off EN
UVLO=" 0 " under-voltage protection does not enable; V
cV
THNCause M
4~ M
7Conducting, 0＜I
CLAMP＜I
CLP, therefore, V
a=R
7* I
CLAMP＜V
THNAnd then cause M
8Turn-off EN
OVP=" 1 " overload protection does not enable; Work as V
CC〉=V
OVPThe time, Z
1Conducting, Z
2Turn-off V
bV
THN, M
2And M
3Conducting, EN
CTL=" 0 " causes M
1Conducting short circuit Z
2, Z so
2Turn-off EN
UVLO=" 0 " under-voltage protection does not enable; V
cV
THNCause M
4~ M
7Conducting, I
CLAMP〉=I
CLP, therefore, V
a=R
7* I
CLAMP=R
7* I
CLPV
THNAnd then cause M
8Conducting, EN
OVP=" 0 " overload protection enables, the driver output of closing switch power supply, protection switch power supply.
4. V
CCV
OVPIn the afterwards decline process, Z
1Conducting, Z
2Turn-off, work as V
1≤ V
CC＜V
OVPThe time, V
bV
THN, M
2And M
3Conducting, EN
CTL=" 0 " causes M
1Conducting short circuit Z
2, Z so
2Turn-off EN
UVLO=" 0 " under-voltage protection does not enable; V
cV
THNCause M
4~ M
7Conducting, 0＜I
CLAMP＜I
CLP, therefore, V
a=R
7* I
CLAMP＜V
THNAnd then cause M
8Turn-off EN
OVP=" 1 " overload protection does not enable but to V
CCStill there is the protection of clamped electric current; Work as V
CC＜V
1The time, V
bV
THN, M
2And M
3Conducting, EN
CTL=" 0 " causes M
1Conducting short circuit Z
2, Z so
2Turn-off EN
UVLO=" 0 " under-voltage protection does not enable; V
c＜V
THNCause M
4~ M
7Turn-off I
CLAMP=0, therefore, V
a=R
7* I
CLAMP=0V＜V
THNAnd then cause M
8Turn-off EN
OVP=" 1 " overload protection does not enable.
5. at V
CC＜V
1Continue afterwards to work as V in the decline process
CC＜V
CCMINThe time, V
b＜V
THN, M
2Turn-off EN
CTL=" 1 ", M
1, M
3Turn-off, cause Z
2Be concatenated into Z
1With R
1Between, V
CC-V
b＜2V
THZ, Z then
1, Z
2Turn-off, as a result V
b=0V; M
3Shutoff causes EN
UVLO=" 1 ", under-voltage protection enables; V
c=0V＜V
THNCause M
4~ M
7Still turn-off I
CLAMP=0 and then cause M
8Turn-off EN
OVP=" 1 " overload protection does not enable.
6. the Switching Power Supply supply lines VCC course of work is in 1. to 5. moving within the scope.
In addition, the implementation of voltage detector 1001 also has other at least 5 kinds of implementations, as shown in Figure 4.Fig. 4 has comprised 5 kinds of embodiment (A) ~ (E), device be engaged in the overvoltage protection controller and power on and the operation principle of under-voltage protection controller with 1. to 5. keeping strokes.
Fig. 5 has shown EN
UVLOWith V
CCBetween relation curve, at V
CCIn the power up, as 0≤V
CC＜V
CCONThe time, EN
UVLO=" 1 " internal circuit is not worked; Work as V
CC〉=V
CCONThe time, EN
UVLO=" 0 " internal circuit startup work.At V
CCBe higher than V
CCONIn the lower electric process afterwards, work as V
CC〉=V
CCMINThe time, EN
UVLO=" 0 " internal circuit maintenance work; As 0≤V
CC＜V
CCMINThe time, EN
UVLO=" 1 " under-voltage protection enables, and internal circuit is not worked; Fig. 6 has shown I
CLAMPWith V
CCBetween relation curve, as 0≤V
CC＜V
1The time, I
CLAMP=0; Work as V
1≤ V
CC＜V
OVPThe time, 0≤I
CLAMP＜I
CLPWork as V
CC=V
OVPThe time, I
CLAMP=I
CLPFig. 7 has shown EN
OVPWith V
CCBetween relation curve, as 0＜V
CC＜V
OVPThe time, EN
OVP=" 0 ", overvoltage protection does not enable; Work as V
CCV
OVPThe time, EN
OVP=" 1 ", overvoltage protection enables, the output of stopcock power drives.
In sum as seen, has the Low Drift Temperature characteristic by the multiple tube Z1, the Z2 that use in the utility model, therefore threshold voltage V of the present utility model
OVP, V
CCMINAnd V
CCONAll possess the Low Drift Temperature characteristic, this characteristic is applied to switch power converter, can allow the switch power supply changeover device be applied to high and cold high temperature area, can adapt to and dislike very much temperature condition slightly.Circuit realizes that simply the little cost of area is low, uses switching voltage converter of the present utility model to have more advantage in market competition simultaneously.
Be applied to by way of example in the power supply changeover device although be noted that the utility model here, the utility model itself has the wider range of application beyond the example.Can reach the effect that equivalent signals is transmitted by other method except example (for example using bipolar transistor) such as multiple tube or transistor.
See also Fig. 8, Fig. 8 is based on the power supply changeover device 100 of Low Drift Temperature startup and under-voltage overvoltage protection multiplex circuit, comprises that a control circuit 300 lotus roots are connected to a back coupling unit 104, to produce a switching signal V
SW, this switching signal is regulated the output signal V of power supply changeover device
OThese back coupling unit 104 lotus roots are connected to the output V of power supply changeover device
O, to produce a feedback signal V
CTRLWherein, this switching signal V
SWAccording to feedback signal V
CTRLAnd change.The switching current I of one transformer TR1
SVia resistance R
SBe converted into voltage signal V
SThis signal V
SAccepted and produce accordingly switching signal V by control circuit 300
SWThis control circuit 300 floats by inner cryogenic and starts and under-voltage overvoltage multiplex circuit 1000 generation enable logic signal EN
UVLOAnd EN
OVPEN
UVLO, EN
OVP, V
CTRL, V
SLotus root is connected to pulse width modulator 2000, produces this switching signal V of frequency modulating through pulsewidth modulator 2000
SW
Although the present invention discloses as above with preferred embodiment, yet it should not limit the present invention, any person skilled in the art, without departing from the spirit and scope of the present invention, when doing a little change and replacement.Therefore protection scope of the present invention is as the criterion when looking accompanying the claim person of defining.
Claims (7)
1. a Low Drift Temperature starts and under-voltage overvoltage protection multiplex circuit, it is characterized in that, comprising:
One overvoltage protection controller;
One voltage detector, its first output is connected with the input of described overvoltage protection controller; And
One powers on and the under-voltage protection controller, and its input is connected with the second output of described voltage detector, and its first output is connected with the input of described voltage detector.
2. Low Drift Temperature according to claim 1 starts and under-voltage overvoltage protection multiplex circuit, it is characterized in that: described voltage detector comprises first and second multiple tube and first and second resistance and the first transistor; Described first and second multiple tube has the breakdown threshold voltage V of Low Drift Temperature
Z, when cathode potential is higher than anode V
ZAfter, this multiple tube conducting, otherwise cut-off; The negative electrode of described the first multiple tube connects supply lines; The anode of described the first multiple tube be connected the negative electrode of multiple tube and be connected with the source electrode of described the first transistor; The first end of the anode of described the second multiple tube, the first resistance is connected drain electrode and is connected with the second output of described voltage detector with the first transistor; The second end of described the first resistance be connected the first end of resistance and be connected with the first output of described voltage detector; The grid of described the first transistor is connected with the input of described voltage detector.
3. Low Drift Temperature according to claim 1 starts and under-voltage overvoltage protection multiplex circuit, it is characterized in that: described power on and the under-voltage protection controller comprises second and third transistor and third and fourth resistance and inverter; The grid of described transistor seconds powers on and the input of under-voltage protection controller is connected with described; The second end of the drain electrode of described transistor seconds, the 3rd resistance and the 3rd transistorized grid power on and the first output of under-voltage protection controller is connected with described; The second end ground connection of the source electrode of described transistor seconds and the 4th resistance; The first termination supply lines of the described the 3rd transistorized source electrode and the 3rd resistance; The first end of the described the 3rd transistorized drain electrode, the 4th resistance be connected the input of inverter and connect; Described inverter output powers on and the second output of under-voltage protection controller is connected with described.
4. Low Drift Temperature according to claim 1 starts and under-voltage overvoltage protection multiplex circuit, and it is characterized in that: described overvoltage protection controller comprises fourth, fifth, six, seven, eight transistors and the 5th, six, seven resistance and a capacitor; The described the 4th transistorized grid is connected with the input of described overvoltage protection controller; Described fourth, fifth transistorized drain electrode is connected with described the 5th, six transistorized grids; The first end of the described the 6th transistorized drain electrode, the 5th resistance is connected with the first end of described capacitor with the 7th transistorized grid; The second end of described capacitor is connected with the first end of described the 6th resistor; The second end of described the 6th resistor, the 7th transistorized drain electrode and the 5th, six transistorized source electrodes connect supply lines; The first end of the described the 7th transistorized source electrode and the 7th resistance is connected with the described the 8th transistorized grid; The described the 8th transistorized drain electrode is connected with the output of described overvoltage protection controller; The second end ground connection of the described the 8th transistorized source electrode and the 5th, seven resistance.
5. according to claim 1 to 4 described Low Drift Temperatures startup and under-voltage overvoltage protection multiplex circuits, it is characterized in that: described Low Drift Temperature starts and under-voltage overvoltage protection multiplex circuit is integrated in the integrated package.
6. the Switching Power Supply of application rights 1 a described circuit; comprise transformer and a control circuit; it is characterized in that: described control circuit lotus root connects a back coupling unit of being located at the transformer output; regulate the pulse duration of described transformer to produce a switching signal, described control circuit is started by described Low Drift Temperature and under-voltage overvoltage protection multiplex circuit and pulse width modulator lotus root connect and form.
7. Switching Power Supply according to claim 1 is characterized in that: described control circuit is one to be started and under-voltage overvoltage protection multiplex circuit and pulse width modulator lotus root connect the integrated circuit that forms by described Low Drift Temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220292636 CN202679232U (en) | 2012-06-21 | 2012-06-21 | Low temperature drift starting and under-voltage over-voltage protection reuse circuit, and switch power supply with application of the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220292636 CN202679232U (en) | 2012-06-21 | 2012-06-21 | Low temperature drift starting and under-voltage over-voltage protection reuse circuit, and switch power supply with application of the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202679232U true CN202679232U (en) | 2013-01-16 |
Family
ID=47500104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220292636 Expired - Lifetime CN202679232U (en) | 2012-06-21 | 2012-06-21 | Low temperature drift starting and under-voltage over-voltage protection reuse circuit, and switch power supply with application of the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202679232U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107449959A (en) * | 2017-07-25 | 2017-12-08 | 郑州瑞能电源技术有限公司 | Input over under-voltage protection circuit |
| CN111023441A (en) * | 2019-12-30 | 2020-04-17 | Tcl空调器(中山)有限公司 | Air conditioner control method and system, storage medium and air conditioner |
-
2012
- 2012-06-21 CN CN 201220292636 patent/CN202679232U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107449959A (en) * | 2017-07-25 | 2017-12-08 | 郑州瑞能电源技术有限公司 | Input over under-voltage protection circuit |
| CN111023441A (en) * | 2019-12-30 | 2020-04-17 | Tcl空调器(中山)有限公司 | Air conditioner control method and system, storage medium and air conditioner |
| CN111023441B (en) * | 2019-12-30 | 2021-08-24 | Tcl空调器(中山)有限公司 | Air conditioner control method and system, storage medium and air conditioner |
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Granted publication date: 20130116 |