CN109194097A - Switching power source control circuit and method and Switching Power Supply - Google Patents
Switching power source control circuit and method and Switching Power Supply Download PDFInfo
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- CN109194097A CN109194097A CN201811146178.1A CN201811146178A CN109194097A CN 109194097 A CN109194097 A CN 109194097A CN 201811146178 A CN201811146178 A CN 201811146178A CN 109194097 A CN109194097 A CN 109194097A
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- switching power
- time
- inductive current
- power supply
- afterflow
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000001939 inductive effect Effects 0.000 claims abstract description 60
- 238000012512 characterization method Methods 0.000 claims description 14
- 230000005611 electricity Effects 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 abstract description 8
- 238000002955 isolation Methods 0.000 abstract description 5
- 238000005070 sampling Methods 0.000 abstract description 5
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 239000003990 capacitor Substances 0.000 description 8
- 238000004891 communication Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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Classifications
-
- 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
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
-
- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a kind of switching power source control circuits and method and Switching Power Supply, the switching power source control circuit is after the completion of auxiliary switch pipe afterflow, Switching Power Supply main switch is opened in delay at the first time, according to auxiliary switch pipe time of afterflow and reference time, it adjusts inductive current peak or/and adjusts at the first time, so that control switch electric power output voltage is predeterminated voltage.The present invention is while control switch electric power output voltage is constant, circuit is simple, peripheral components are less, do not need sampling and outputting voltage and output voltage setting is flexible, the peripheral circuits such as optocoupler are not needed in isolation type switching power supply, and the information transmission on the former secondary side of isolation type switching power supply can be realized.
Description
Technical field
The present invention relates to a kind of power electronics field, in particular to a kind of switching power source control circuit and method and open
Powered-down source.
Background technique
The application that Switching Power Supply exports Isobarically Control is especially extensive.Such as in intelligent dimming field, the output of Switching Power Supply
In load other than LED, often contain such as other communication modules of wireless module/bluetooth module.As shown in Figure 1, Switching Power Supply
Output end vo ut is connected with LED, while by linear voltage regulator, connecting rear class communication module (being indicated in Fig. 1 with R1).In LED
When work, the power supply of rear class communication module is easy to accomplish；When LED is standby, it is contemplated that power problems need Switching Power Supply
Output one is much smaller than the constant pressure of lamp pressure drop, to realize communication module normal power supply.
The prior art utilizes the difference of collected output voltage and reference voltage by the output voltage of acquisition Switching Power Supply
It is worth closed loop and adjusts output voltage, so that output voltage maintains the size of reference voltage, thus realize voltage close loop control, so that
The output voltage of Switching Power Supply is constant.
But for isolated Switching Power Supply, former secondary voltage is kept apart, and the acquisition of output voltage needs to utilize auxiliary
Winding or optocoupler are acquired, and output voltage setting is not flexible, need more peripheral components, and circuit is complex；For non-
Isolated Switching Power Supply can be provided with a FB pin, by FB pin come the defeated of sampling switch power supply in integrated circuits
The problems such as voltage out, short circuit, poor contact can occur for FB pin, so that effect is not achieved in Isobarically Control, and if not needing to acquire
Output voltage, it can FB pin is saved, to reduce cost.
Summary of the invention
The flexible Switching Power Supply control electricity of less and output voltage setting the object of the present invention is to provide a kind of peripheral components
Road and method and Switching Power Supply, the setting for solving output voltage of the existing technology is not flexible, need more peripheral components,
Circuit is complex and the technical issues of needing sampling and outputting voltage.
To achieve the above object, the present invention provides a kind of switching power source control circuits, after the completion of auxiliary switch pipe afterflow,
Delay opens Switching Power Supply main switch at the first time, according to auxiliary switch pipe time of afterflow and reference time, adjusts inductive current
Peak value or/and adjusting first time, so that control switch electric power output voltage is predeterminated voltage.
Optionally, after inductive current reaches pre-set peak value in Switching Power Supply, main switch shutdown, auxiliary switch pipe starts to continue
Stream；Inductive current starts lower than first threshold, and after postponing first time, Switching Power Supply main switch is connected.
Optionally, the reference time is proportional to the difference of inductive current pre-set peak value and first threshold.
Optionally, when the time of afterflow of auxiliary switch pipe is less than the reference time, reduce inductive current peak or/and extend the
One time, so that output voltage declines；
When the time of afterflow of auxiliary switch pipe is greater than the reference time, increases inductive current peak or/and shortens at the first time,
So that output voltage rises.
Optionally, when first time being lower than second threshold, by adjusting inductive current peak, so that output voltage maintains
In predeterminated voltage；
When inductive current peak be lower than third threshold value when, by adjust at the first time so that output voltage maintain it is default
Voltage.
Optionally, the switching power source control circuit includes error amplifier and delay circuit, the error amplifier
First input end receives the voltage signal of characterization auxiliary switch pipe time of afterflow, and the second input terminal of the error amplifier receives table
The voltage signal of sign reference time, the input terminal of the error amplifier output connection delay circuit, the delay circuit
Output end passes through the control terminal of logic circuit connection switch power main switch pipe, and the delay circuit is adjusted at the first time.
Optionally, the switching power source control circuit further includes that peak value adjusts circuit, and the peak value adjusts the input of circuit
The output end of end connection error amplifier, the output end that the peak value adjusts circuit are opened by logic circuit connection switch power supply master
The control terminal of pipe is closed, the peak value adjusts circuit and adjusts inductive current peak.
Optionally, the switching power source control circuit includes error amplifier and peak value adjusts circuit, the error amplification
The first input end of device receives the voltage signal of characterization auxiliary switch pipe time of afterflow, the second input terminal table of the error amplifier
The voltage signal of reference time is levied, the error amplifier output connects the input terminal that the peak value adjusts circuit, the peak
The output end that value adjusts circuit passes through the control terminal of logic circuit connection switch power main switch pipe, and the peak value adjusts circuit tune
Save inductive current peak.
The present invention also provides a kind of Switching Power Supply control methods, comprising the following steps:
After the completion of auxiliary switch pipe afterflow, Switching Power Supply main switch is opened in delay at the first time；
According to auxiliary switch pipe time of afterflow and reference time, adjusts inductive current peak or/and adjust at the first time, thus
Control switch electric power output voltage is predeterminated voltage.
Optionally, after inductive current reaches pre-set peak value in Switching Power Supply, main switch shutdown, auxiliary switch pipe starts to continue
Stream；Inductive current starts lower than first threshold, and after postponing first time, Switching Power Supply main switch is connected.
Optionally, the reference time is proportional to the difference of inductive current peak and first threshold.
Optionally, when the time of afterflow of auxiliary switch pipe is less than the reference time, reduce inductive current peak or/and extend the
One time, so that output voltage declines；
When the time of afterflow of auxiliary switch pipe is greater than the reference time, increases inductive current peak or/and shortens at the first time,
So that output voltage rises.
Optionally, when first time being lower than second threshold, by adjusting inductive current peak, so that output voltage maintains
In predeterminated voltage；
When inductive current peak be lower than third threshold value when, by adjust at the first time so that output voltage maintain it is default
Voltage.
The present invention also provides a kind of Switching Power Supplies, including a kind of switching power source control circuit of any of the above and power circuit.
Compared with prior art, the technical solution of the present invention has the advantage that the present invention in Switching Power Supply auxiliary switch pipe
After the completion of afterflow, delay opens Switching Power Supply main switch at the first time, by auxiliary switch pipe time of afterflow and reference time, adjusts
Section first time or/and inductive current peak, and then switch power source output voltage is had adjusted, thus control switch power supply output electricity
Pressure is predeterminated voltage.Switching Power Supply control method of the invention is while control switch electric power output voltage is constant, circuit letter
List, peripheral components are less, do not need sampling and outputting voltage and output voltage setting is flexible.The present invention be suitable for it is isolated and it is non-every
From formula Switching Power Supply, especially there is biggish advantage in isolation type switching power supply, does not need the peripheral circuits such as optocoupler, can be realized
The information transmission on the former secondary side of isolation type switching power supply.
Detailed description of the invention
Fig. 1 is the circuit diagram of prior art switching power source control circuit；
Fig. 2 is the schematic diagram of switching power source control circuit embodiment of the present invention；
Fig. 3 is the working waveform figure of switching power source control circuit of the present invention；
Fig. 4 is the generation circuit figure of the voltage signal of present invention characterization auxiliary switch pipe time of afterflow.
Specific embodiment
The preferred embodiment of the present invention is described in detail below in conjunction with attached drawing, but the present invention is not restricted to these
Embodiment.The present invention covers any substitution made in the spirit and scope of the present invention, modification, equivalent method and scheme.
In order to make the public have thorough understanding to the present invention, it is described in detail in the following preferred embodiment of the present invention specific
Details, and the present invention can also be understood completely in description without these details for a person skilled in the art.
The present invention is more specifically described by way of example referring to attached drawing in the following passage.It should be noted that attached drawing is adopted
With more simplified form and using non-accurate ratio, only to facilitate, lucidly aid in illustrating the embodiment of the present invention
Purpose.
The present invention provides a kind of switching power source control circuits, and after the completion of auxiliary switch pipe afterflow, delay is opened at the first time
Logical Switching Power Supply main switch adjusted inductive current peak or/and adjusts the according to auxiliary switch pipe time of afterflow and reference time
One time, so that control switch electric power output voltage is predeterminated voltage.When specifically according to the auxiliary switch pipe afterflow of current period
Between and the reference time, adjust the first time in this period or the peak value in next period.
The reference time is proportional to the difference of inductive current peak and first threshold.Reference time Tref characterization switch
Electric power output voltage is predeterminated voltage V1, corresponding auxiliary to open when the difference of inductive current peak and first threshold is Ipeak-I0
Pass pipe time of afterflow, i.e. Tref=(Ipeak-I0) × L/V1, thus, for the same circuit, Tref=k × (Ipeak-
I0), the difference of k=L/V1, i.e., described reference time Tref and inductive current peak and first threshold is proportional.
Switching Power Supply is peak value control, i.e., after inductive current reaches pre-set peak value in Switching Power Supply, main switch shutdown is auxiliary
Switching tube starts afterflow；Inductive current starts lower than first threshold, and after postponing first time, Switching Power Supply main switch is connected.
When output voltage is higher than predeterminated voltage, the time of afterflow of auxiliary switch pipe is less than the reference time, reduces inductive current peak
Value or/and extension first time, so that output voltage declines；When output voltage is lower than predeterminated voltage, auxiliary switch pipe continues
The time is flowed greater than the reference time, is increased inductive current peak or/and is shortened at the first time, so that output voltage rises.
Above-mentioned switching power source control circuit only can adjust inductive current peak at the first time or only by adjusting come steady
Determine output voltage, can also be stabilized the output voltage at the first time with inductive current peak by adjusting simultaneously, it can also be not
Selection adjusts first time, inductive current peak or first time and inductive current peak respectively under the same period or different conditions
Value reaches above-mentioned purpose.Such as in a kind of preferably embodiment, when output power is excessive, it is lower than second threshold at the first time,
Then by adjusting inductive current peak, so that output voltage maintains predeterminated voltage；When output power is too small, inductive current peak
Lower than third threshold value, then by adjusting at the first time, so that output voltage maintains predeterminated voltage.
Above-mentioned second threshold and third threshold value can according to being configured in practice, the present invention to its occurrence without
Limitation.
As shown in Fig. 2, illustrating a kind of specific structure of embodiment of switching power source control circuit.Including error amplifier
U1, delay circuit and peak value adjust circuit, when the first input end of the error amplifier U1 receives characterization auxiliary switch pipe afterflow
Between T2 voltage signal VT2, the voltage signal of the second input terminal reception characterization reference time Tref of the error amplifier U1
Vref, the error amplifier U1 output thermal compensation signal are to delay circuit and peak value adjusting circuit, the delay circuit and described
Peak value adjusts the output end of circuit through the control terminal of logic circuit connection switch power main switch pipe, the error amplifier it is defeated
Outlet connects one end of capacitor C1, and the other end of capacitor C1 is grounded, and the voltage on capacitor C1 is Vcom.
As shown in figure 3, wherein iL is the inductive current of Switching Power Supply, T1 is the working waveform figure of switching power source control circuit
At the first time, switching tube time of afterflow supplemented by T2.As can be seen that the Switching Power Supply control is that peak value controls, inductive current reaches
To after pre-set peak value, main switch shutdown, auxiliary switch pipe starts afterflow；Inductive current starts lower than first threshold, delay first
After time T1, Switching Power Supply main switch is connected.The first threshold can be theoretically arbitrary value, in the embodiment of the present invention
In, first threshold zero.The turn-off time Toff of the main switch is equal to time of afterflow T2 and the delay time of auxiliary switch pipe
The sum of T1, i.e. Toff=T1+T2.
In the present embodiment when output voltage changes, according to the voltage signal V of characterization auxiliary switch pipe time of afterflow T2T2And table
The voltage signal Vref of reference time Tref is levied, inductive current peak Vpeak is adjusted or/and adjusts first time T1, to control
Switch power source output voltage processed is predeterminated voltage V1.
The variation tendency of the time of afterflow T2 of the output voltage Vout and auxiliary switch pipe of the Switching Power Supply is opposite.
Specific adjustment process is as follows:
1) when switch power source output voltage Vout is greater than the set value V1, auxiliary switch pipe time of afterflow T2 shortens, auxiliary switch
The time of afterflow T2 of pipe is less than reference time Tref, characterizes the voltage signal of the time of afterflow T2 of the auxiliary switch pipe in current period
VT2Less than the voltage signal Vref, i.e. V of characterization reference time TrefT2Less than Vref, then the output voltage of error amplifier U1 becomes
Greatly, i.e., Vcom becomes larger, and reduces inductive current peak or/and extends at the first time, so that output voltage Vout declines；
2) when switch power source output voltage Vout is less than setting value V1, auxiliary switch pipe time of afterflow T2 is elongated, auxiliary switch
The time of afterflow T2 of pipe is greater than reference time Tref, then characterizes the voltage signal of the time of afterflow T2 of auxiliary switch pipe in current period
VT2Greater than the voltage signal Vref, i.e. V that characterization auxiliary switch pipe refers to time of afterflow TrefT2Less than Vref, then error amplifier U1
Output voltage become smaller, i.e., Vcom becomes smaller, increase inductive current peak or/and shorten at the first time so that output voltage
Vout rises；
1) and/or 2) 3) above-mentioned process is repeated, until the output voltage of Switching Power Supply is predeterminated voltage V1.
Above-mentioned adjustment process 1) and 2) in can only by delay circuit adjust at the first time stabilize the output voltage, can
Circuit adjusting inductive current peak is adjusted by peak value to stabilize the output voltage, and can also be adjusted simultaneously by delay circuit and peak value
Circuit is adjusted simultaneously to be stabilized the output voltage with inductive current peak at the first time, can also section or different in different times
Above-mentioned three kinds of regulative modes are selected under output state respectively.Such as in a kind of preferably embodiment, when output power is excessive, the
One time be lower than second threshold, by adjust inductive current peak adjust the reference time so that output voltage maintain it is pre-
If voltage；When output power is too small, inductive current peak is lower than third threshold value, by adjusting at the first time, so that output electricity
Pressure maintains predeterminated voltage.
The present invention simply shows one embodiment, in other examples, can there was only delay circuit, can also be only
There is peak value to adjust circuit.
As shown in figure 4, giving the generation circuit of the voltage signal of characterization auxiliary switch pipe time of afterflow, including current detecting
Circuit and current source I1, switch S1 and capacitor C2, the current source I1, switch S1 and capacitor C2 are sequentially connected in series the two of power supply
End, the current detection circuit connect the control terminal of the switch S1.When current detection circuit detects that inductive current reaches peak
When being worth electric current, the switch S1 closure, the current source I1 starts to charge to capacitor C2, when current detection circuit detects
When inductor current value is zero, switch S1 is disconnected, and current source I1 stops powering to capacitor C2, and the voltage on capacitor C2 is table at this time
Levy the voltage signal V of auxiliary switch pipe time of afterflowT1。
It includes comparator that the peak value, which adjusts circuit, and one end of the comparator receives the first reference voltage Vref 1, described
The other end of comparator acquires the inductive current of Switching Power Supply, the output end connection logic electricity of the comparator by sampling resistor
Road.When needing that inductive current peak is turned up, the first reference voltage Vref l is turned up, when needing to turn down inductive current peak, adjusts
Low first reference voltage Vref 1.
In addition, in the embodiment shown in Figure 2, auxiliary switch pipe time of afterflow T2 and reference time Tref are converted to voltage
Signal is compared, and in other examples, is also possible to directly carry out the comparison of the time other modes such as relatively, at this
In the protection scope of invention.
The present invention is suitable for the output Isobarically Control of isolated and non-isolated switch, and in isolation type switching power supply,
It does not need auxiliary winding or the complicated peripheral circuits such as optocoupler carries out, can directly carry out the information transmitting on former secondary side, advantage is more
Add obvious.
Although embodiment is separately illustrated and is illustrated above, it is related to the common technology in part, in ordinary skill
Personnel apparently, can be replaced and integrate between the embodiments, be related to one of embodiment and the content recorded is not known, then
It can refer to another embodiment on the books.
Embodiments described above does not constitute the restriction to the technical solution protection scope.It is any in above-mentioned implementation
Made modifications, equivalent substitutions and improvements etc., should be included in the protection model of the technical solution within the spirit and principle of mode
Within enclosing.
Claims (10)
1. a kind of switching power source control circuit, it is characterised in that: after the completion of auxiliary switch pipe afterflow, delay is opened out at the first time
Powered-down source main switch, according to auxiliary switch pipe time of afterflow and reference time, when adjusting inductive current peak or/and adjusting first
Between, so that control switch electric power output voltage is predeterminated voltage.
2. switching power source control circuit according to claim 1, it is characterised in that: inductive current reaches pre- in Switching Power Supply
If after peak value, main switch shutdown, auxiliary switch pipe starts afterflow；Inductive current starts lower than first threshold, and delay is at the first time
Afterwards, Switching Power Supply main switch is connected.
3. switching power source control circuit according to claim 1, it is characterised in that: the reference time and inductive current peak
The difference of value and first threshold is proportional.
4. switching power source control circuit according to claim 1 to 3, it is characterised in that: when continuing for auxiliary switch pipe
When flowing the time less than the reference time, reduce inductive current peak or/and extend at the first time, so that output voltage declines；
When the time of afterflow of auxiliary switch pipe is greater than the reference time, increases inductive current peak or/and shorten at the first time, thus
So that output voltage rises.
5. switching power source control circuit according to claim 4, it is characterised in that: be lower than second threshold when first time
When, by adjusting inductive current peak, so that output voltage maintains predeterminated voltage；
When inductive current peak is lower than third threshold value, by adjusting at the first time, so that output voltage maintains predeterminated voltage.
6. switching power source control circuit according to claim 4, it is characterised in that: the switching power source control circuit includes
Error amplifier and delay circuit, the first input end of the error amplifier receive the voltage of characterization auxiliary switch pipe time of afterflow
Signal, the second input terminal of the error amplifier receive the voltage signal of characterization reference time, the error amplifier it is defeated
The output end of the input terminal of outlet connection delay circuit, the delay circuit passes through logic circuit connection switch power main switch pipe
Control terminal, the delay circuit adjusts at the first time.
7. switching power source control circuit according to claim 6, it is characterised in that: the switching power source control circuit also wraps
It includes peak value and adjusts circuit, the peak value adjusts the output end of the input terminal connection error amplifier of circuit, and the peak value adjusts electricity
The output end on road passes through the control terminal of logic circuit connection switch power main switch pipe, and the peak value adjusts circuit and adjusts inductance electricity
Stream peak value.
8. switching power source control circuit according to claim 4, it is characterised in that: the switching power source control circuit includes
Error amplifier and peak value adjust circuit, and the first input end of the error amplifier receives characterization auxiliary switch pipe time of afterflow
Voltage signal, the second input terminal of the error amplifier receive the voltage signal of characterization reference time, the error amplifier
Output end connects the input terminal that the peak value adjusts circuit, and the output end that the peak value adjusts circuit is opened by logic circuit connection
The control terminal of powered-down source main switch, the peak value adjust circuit and adjust inductive current peak.
9. a kind of Switching Power Supply control method, comprising the following steps:
After the completion of auxiliary switch pipe afterflow, Switching Power Supply main switch is opened in delay at the first time；
According to auxiliary switch pipe time of afterflow and reference time, adjusts inductive current peak or/and adjust at the first time, to control
Switch power source output voltage is predeterminated voltage.
10. Switching Power Supply control method according to claim 9, it is characterised in that: inductive current reaches in Switching Power Supply
After pre-set peak value, main switch shutdown, auxiliary switch pipe starts afterflow, and inductive current starts lower than first threshold, when postponing first
Between after, be connected Switching Power Supply main switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811146178.1A CN109194097A (en) | 2018-09-28 | 2018-09-28 | Switching power source control circuit and method and Switching Power Supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811146178.1A CN109194097A (en) | 2018-09-28 | 2018-09-28 | Switching power source control circuit and method and Switching Power Supply |
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| Publication Number | Publication Date |
|---|---|
| CN109194097A true CN109194097A (en) | 2019-01-11 |
Family
ID=64907040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811146178.1A Pending CN109194097A (en) | 2018-09-28 | 2018-09-28 | Switching power source control circuit and method and Switching Power Supply |
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| Country | Link |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120181999A1 (en) * | 2010-07-22 | 2012-07-19 | Da Feng Weng | High accuracy inductor peak current control scheme for switching power supply |
| CN104578790A (en) * | 2014-12-29 | 2015-04-29 | 东南大学 | Digital signal sampling circuit applied to primary-side feedback flyback converter and control method of digital signal sampling circuit |
| CN107769566A (en) * | 2017-03-28 | 2018-03-06 | 杰华特微电子（杭州）有限公司 | Isolated on-off circuit and its control method |
| CN208971373U (en) * | 2018-09-28 | 2019-06-11 | 杰华特微电子（杭州）有限公司 | Switching power source control circuit and Switching Power Supply |
-
2018
- 2018-09-28 CN CN201811146178.1A patent/CN109194097A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120181999A1 (en) * | 2010-07-22 | 2012-07-19 | Da Feng Weng | High accuracy inductor peak current control scheme for switching power supply |
| CN104578790A (en) * | 2014-12-29 | 2015-04-29 | 东南大学 | Digital signal sampling circuit applied to primary-side feedback flyback converter and control method of digital signal sampling circuit |
| CN107769566A (en) * | 2017-03-28 | 2018-03-06 | 杰华特微电子（杭州）有限公司 | Isolated on-off circuit and its control method |
| CN208971373U (en) * | 2018-09-28 | 2019-06-11 | 杰华特微电子（杭州）有限公司 | Switching power source control circuit and Switching Power Supply |
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Address after: Room 901-23, 9 / F, west 4 building, Xigang development center, 298 Zhenhua Road, Sandun Town, Xihu District, Hangzhou City, Zhejiang Province, 310030 Applicant after: Jiehuate Microelectronics Co.,Ltd. Address before: Room 424, building 1, 1500 Wenyi West Road, Cangqian street, Yuhang District, Hangzhou City, Zhejiang Province Applicant before: JOULWATT TECHNOLOGY Inc.,Ltd. |
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| CB02 | Change of applicant information |