CN209120051U - A kind of switching power source control circuit and Switching Power Supply - Google Patents
A kind of switching power source control circuit and Switching Power Supply Download PDFInfo
- Publication number
- CN209120051U CN209120051U CN201821595751.2U CN201821595751U CN209120051U CN 209120051 U CN209120051 U CN 209120051U CN 201821595751 U CN201821595751 U CN 201821595751U CN 209120051 U CN209120051 U CN 209120051U
- Authority
- CN
- China
- Prior art keywords
- circuit
- switching power
- service time
- adjusts
- power source
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The utility model discloses a kind of switching power source control circuit and Switching Power Supplies, switching power source control circuit is according to the service time of main switch and the time of afterflow of auxiliary switch pipe, the first ratio is obtained, first ratio is to detect the service time of main switch than the sum of the service time of main switch and time of afterflow of auxiliary switch pipe；According to the first ratio and corresponding reference value, the output electric current of regulating switch power supply, so that control switch electric power output voltage is predeterminated voltage.The utility model 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 utility model relates to a kind of power electronics field, in particular to a kind of switching power source control circuit and switch
Power supply.
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, Lai Shixian 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 sampling switch power supply in integrated circuits
The problems such as output voltage, short circuit, poor contact can occur for FB pin, so that effect is not achieved in Isobarically Control, and if not needing to adopt
Collect output voltage, it can FB pin is saved, to reduce cost.
Utility model content
The flexible Switching Power Supply control of less and output voltage setting the purpose of the utility model is to provide a kind of peripheral components
Circuit processed and Switching Power Supply, the setting for solving output voltage of the existing technology is not flexible, needs more peripheral components, electricity
Road is complex and the technical issues of needing sampling and outputting voltage.
To achieve the above object, the utility model provides a kind of switching power source control circuit, according to opening for main switch
The time of afterflow of logical time and auxiliary switch pipe, obtain the first ratio, and first ratio is to detect the service time of main switch
Than the sum of the service time of main switch and time of afterflow of auxiliary switch pipe；
According to the first ratio and corresponding reference value, the output electric current of regulating switch power supply, so that control switch power supply exports
Voltage is predeterminated voltage.
Optionally, the input voltage for detecting the Switching Power Supply, according to input voltage and predeterminated voltage setting
Reference value, the reference value reduce with the increase of input voltage.
Optionally, under discontinuous conduct mode, by adjust inductive current peak or main switch service time or/and
Adjust the output electric current of the Switching Power Supply at the first time, the first time is main switch and when auxiliary switch pipe is turned off
Between.
Optionally, under continuous current mode, by adjust inductive current peak or main switch service time or/and
Inductive current valley adjusts the output electric current of the Switching Power Supply.
Optionally, when the first ratio is greater than reference value, reduce inductive current peak or shorten when opening of main switch
Between or/and extend at the first time so that output voltage decline；
When the first ratio be less than reference value when, increase inductive current peak or extend main switch service time or/and
Shorten at the first time, so that output voltage rises.
Optionally, when the first ratio is greater than reference value, reduce inductive current peak or shorten when opening of main switch
Between or/and reduce inductive current valley so that output voltage decline；
When the first ratio be less than reference value when, increase inductive current peak or extend main switch service time or/and
Increase the valley of inductive current, so that output voltage rises.
Optionally, the switching power source control circuit includes error amplifier and delay circuit, the error amplifier
First input end receives the voltage signal of the first ratio of characterization, and the second input terminal of the error amplifier receives characterization reference value
Voltage signal, the input terminal of the output end connection delay circuit of the error amplifier, the output end of the delay circuit is logical
The control terminal of logic circuit connection switch power main switch pipe is crossed, the delay circuit is adjusted at the first time.
Optionally, the switching power source control circuit further includes that peak value adjusts circuit or service time adjusting circuit, described
Peak value adjusts the output end of the input terminal connection error amplifier of circuit or service time adjusting circuit, and the peak value adjusts circuit
Or the output end of service time adjusting circuit passes through the control terminal of logic circuit connection switch power main switch pipe, the peak value tune
Economize on electricity road adjusting inductive current peak, and the service time adjusts the service time that circuit adjusts main switch.
Optionally, the switching power source control circuit includes error amplifier and peak value adjusts circuit or service time is adjusted
Circuit, the first input end of the error amplifier receive the voltage signal of the first ratio of characterization, and the of the error amplifier
Two input terminals receive the voltage signal of characterization reference value, and the error amplifier output connects the peak value and adjusts circuit or open
The input terminal of logical time adjustment circuit, the peak value adjusts circuit or the output end of service time adjusting circuit passes through logic circuit
The control terminal of connection switch power main switch pipe, the peak value adjust circuit and adjust inductive current peak, the service time tune
Economize on electricity road adjusts the service time of main switch.
Optionally, the switching power source control circuit further includes that valley adjusts circuit, and the valley adjusts the input of circuit
The output end of end connection error amplifier, the output end that the valley adjusts circuit are opened by logic circuit connection switch power supply master
The control terminal of pipe is closed, the valley adjusts circuit and adjusts inductive current valley.
Optionally, the switching power source control circuit includes error amplifier and valley adjusts circuit, the error amplification
The first input end of device receives the voltage signal of the first ratio of characterization, and the second input terminal of the error amplifier receives characterization ginseng
The voltage signal of value is examined, the output end connection valley of the error amplifier adjusts the input terminal of circuit, and the valley adjusts electricity
The output end on road passes through the control terminal of logic circuit connection switch power main switch pipe, and the valley adjusts circuit and adjusts inductance electricity
Flow valley.
The utility model also provides a kind of Switching Power Supply, including a kind of switching power source control circuit of any of the above and power electricity
Road.
Compared with prior art, the technical solution of the utility model has the advantage that the utility model according to the first ratio
Example and corresponding reference value, the output electric current of regulating switch power supply, and then switch power source output voltage is had adjusted, thus control switch
Electric power output voltage is predeterminated voltage.The Switching Power Supply control method of the utility model is constant in control switch electric power output voltage
While, circuit is simple, peripheral components are less, do not need sampling and outputting voltage and output voltage setting is flexible.The utility model
Suitable for isolated and non-isolated Switching Power Supply, especially there is biggish advantage in isolation type switching power supply, do not need optocoupler
The information transmission on the former secondary side of isolation type switching power supply can be realized in equal peripheral circuits.
Detailed description of the invention
Fig. 1 is the circuit diagram of prior art switching power source control circuit；
Fig. 2 is working principle diagram of the utility model switching power source control circuit under discontinuous mode；
Fig. 3 is the working principle diagram of the utility model switching power source control circuit in a continuous mode；
Fig. 4 is the schematic diagram of the utility model switching power source control circuit embodiment.
Specific embodiment
It is described in detail below in conjunction with preferred embodiment of the attached drawing to the utility model, but the utility model is not merely
It is limited to these embodiments.The utility model covers any substitution made in the spirit and scope of the utility model, modification, equivalent
Method and scheme.
In order to make the public have thorough understanding to the utility model, in following the preferred embodiment in the utility model specifically
Concrete details is illustrated, and that this can also be understood completely is practical new for description without these details for a person skilled in the art
Type.
The utility model is more specifically described by way of example referring to attached drawing in the following passage.It should be noted that attached drawing
It is all made of more simplified form and uses non-accurate ratio, only to facilitate, lucidly aid in illustrating the utility model
The purpose of embodiment.
The utility model provides a kind of switching power source control circuit, according to the service time of main switch and auxiliary switch pipe
Time of afterflow, obtain the first ratio K, the first ratio K be detect main switch service time opening than main switch
Logical the sum of time and the time of afterflow of auxiliary switch pipe；
According to the first ratio K and corresponding reference value Kref, the output electric current of regulating switch power supply, thus control switch power supply
Output voltage is predeterminated voltage V1.
The input voltage vin for detecting the Switching Power Supply sets institute according to input voltage vin and the predeterminated voltage V1
Reference value Kref is stated, the reference value Kref reduces with the increase of input voltage.
The reference value Kref is output voltage corresponding first ratio K when being predeterminated voltage V1, it is electric to detect the switch
The input voltage vin in source, in different Switching Power Supplies or different topologys, the reference value is different, for buck circuit,
Kref=V1/Vin, for boost circuit 1/ (1-Kref)=V1/Vin, for Kref/ (1- in buck-boost circuit
Kref)=V1/Vin, therefore the reference value Kref is related to input voltage vin, reduces with the increase of input voltage vin.
Vout is switch power source output voltage, and Vin is the input voltage of Switching Power Supply, for buck circuit, Vout=K*
Vin, Vout=(1/ (1-K)) the * Vin in boost circuit, Vout=(K/ (1-K)) the * Vin in buck-boost circuit,
Therefore when input voltage vin is constant, K increases, and Vout increases, therefore can be by adjusting inductive current peak Ipeak or main switch
The service time T3 or/and adjusting first time T1 of pipe, adjust the value of K, so that switch power source output voltage is default electricity
Press V1.
As shown in Fig. 2, working principle diagram of the utility model switching power source control circuit under discontinuous mode is provided,
After inductive current reaches pre-set peak value Ipeak in Switching Power Supply, main switch shutdown, auxiliary switch pipe starts afterflow；Inductive current
Start lower than first threshold, after postponing first time T1, Switching Power Supply main switch is connected.The first threshold theoretically can be with
For the arbitrary value lower than pre-set peak value Ipeak, in the embodiments of the present invention, first threshold zero.Wherein iLFor switch
The inductive current of power supply, T3 are the service time of main switch, the time of afterflow of switching tube supplemented by T2, T1 be main switch and
The time that auxiliary switch pipe is turned off.
According to the time of afterflow T2 of the service time T3 of main switch and auxiliary switch pipe, the first ratio K is obtained, described
One ratio K is to detect the service time T3 of main switch than the service time T3 of main switch and the time of afterflow of auxiliary switch pipe
The sum of T2, i.e. K=T3/ (T2+T3)).
At discontinuous mode (DCM), by adjust inductive current peak Ipeak or main switch service time T3 or/
The output electric current of the Switching Power Supply is adjusted with first time T1, the first time T1 is main switch and auxiliary switch Guan Jun
The time of shutdown.
When output voltage Vout is higher than predeterminated voltage V1, the first ratio K is greater than reference value Kref, reduces inductive current peak
Ipeak shortens the service time T3 of main switch or/and extends first time T1, so that output voltage Vout declines；
When output voltage Vout is lower than predeterminated voltage V1, the first ratio K is less than reference value Kref, increases inductive current peak
Ipeak extends the service time T3 of main switch or/and shortens first time T1, so that output voltage Vout rises.
Above-mentioned switching power source control circuit only can adjust inductive current peak or only by adjusting at the first time or only
The service time of adjusting main switch stabilizes the output voltage, can also be by adjusting first time and inductive current peak simultaneously
Or stabilized the output voltage at the first time with the service time of main switch, it can also be in different times under section or different conditions
Select one of regulative mode described above respectively to reach pressure stabilizing purpose.Such as in a kind of preferably embodiment, output power
When excessive, it is lower than second threshold at the first time, then by adjusting the service time of inductive current peak or main switch, so that defeated
Voltage maintains predeterminated voltage out；When output power is too small, the service time of inductive current peak or main switch is lower than corresponding
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 utility model to its occurrence not
It is limited.
As shown in Fig. 2, working principle diagram of the utility model switching power source control circuit under discontinuous mode is provided,
Middle iLFor the inductive current of Switching Power Supply, T3 is the service time of main switch, the time of afterflow of switching tube supplemented by T2.
According to the time of afterflow T2 of the service time T3 of main switch and auxiliary switch pipe, the first ratio K is obtained, described
One ratio K is to detect the service time T3 of main switch than the service time T3 of main switch and the time of afterflow of auxiliary switch pipe
The sum of T2, i.e. K=T3/ (T2+T3)).
As shown in figure 3, the working principle diagram of the utility model switching power source control circuit in a continuous mode is provided,
Under continuous current mode (CCM), by the service time T3 or/and inductance that adjust inductive current peak Ipeak or main switch
Electric current valley Ivalley adjusts the output electric current of the Switching Power Supply.
When output voltage Vout is higher than predeterminated voltage V1, the first ratio is greater than reference value, reduces inductive current peak Ipeak
Or shorten the service time T3 of main switch or/and reduce the valley Ivalley of inductive current, so that under output voltage
Drop；
When output voltage Vout is lower than predeterminated voltage V1, the first ratio is less than reference value, increases inductive current peak Ipeak
Or extend the service time T3 of main switch or/and increase the valley Ivalley of inductive current, so that on output voltage
It rises.
Above-mentioned switching power source control circuit can be only by adjusting the only valley of adjusting inductive current or only adjusting inductance
Current peak or the only service time of adjusting main switch stabilize the output voltage, can also be by adjusting inductive current simultaneously
The service time of the valley and main switch of valley and inductive current peak or inductive current stabilizes the output voltage, can also be
One of regulative mode described above is selected to reach pressure stabilizing purpose under the different periods or different conditions respectively.
As shown in figure 4, 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, and the first input end of the error amplifier U1 receives the voltage of the first ratio K of characterization
Signal VK, the voltage signal Vref of the second input terminal reception characterization reference value Kref of the error amplifier U1, the error
Amplifier U1 exports thermal compensation signal and adjusts circuit to delay circuit and peak value, and the delay circuit and the peak value adjust circuit
The output end of control terminal of the output end through logic circuit connection switch power main switch pipe, the error amplifier connects capacitor C1
One end, the other end ground connection of capacitor C1, the voltage on capacitor C1 is Vcom.
According to the voltage signal V of the first ratio K of characterizationKWith the voltage signal Vref of characterization reference value Kref, inductance is adjusted
Current peak Vpeak or/and adjusting first time T1, so that control switch electric power output voltage is predeterminated voltage V1.
Specific adjustment process is as follows:
1) when switch power source output voltage Vout is higher than predeterminated voltage V1, the first ratio K is greater than reference value Kref, then table
Levy the voltage signal V of the first ratio KKGreater than the voltage signal Vref, i.e. V of characterization reference value KrefKGreater than Vref, then error is put
The output voltage of big device U1 becomes larger, i.e., Vcom becomes larger, and reduces inductive current peak Ipeak or/and extends first time T1, thus
So that output voltage Vout declines；
2) when switch power source output voltage Vout is lower than setting voltage V1, the first ratio K is less than reference value Kref, then table
Levy the voltage signal V of the first ratio KKLess than the voltage signal Vref, i.e. V of characterization reference value KrefKLess than Vref, then error is put
The output voltage of big device U1 becomes smaller, i.e., Vcom becomes smaller, and increases inductive current peak Ipeak or/and shortens first time T1, thus
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 was lower than second threshold, by adjusting inductive current peak, so that output voltage maintains predeterminated voltage；Work as output power
When too small, inductive current peak is lower than third threshold value, by adjusting at the first time, so that output voltage maintains predeterminated voltage.
The utility model simply shows one embodiment, in other examples, can there was only delay circuit, can also
To only have peak value to adjust circuit.
Above-mentioned one embodiment for simply showing DCM mode under DCM mode, can only have in other examples
Peak value adjusts circuit or only delay circuit or only service time adjusts circuit, or have peak value adjust circuit and delay circuit or
There is service time to adjust circuit and delay circuit.Under CCM mode, can only have peak value to adjust circuit or only service time adjusting
Circuit or only valley adjust circuit, or have peak value to adjust circuit and valley adjusting circuit or have service time to adjust circuit and paddy
Value adjusts circuit.Its connection is similar to the above embodiments, and the utility model is herein without repeating.
It includes comparator that the peak value, which adjusts circuit, and one end of the comparator receives the first reference voltage Vref 1, institute
The other end for stating comparator acquires the inductive current of Switching Power Supply by sampling resistor, and the output end of the comparator connects logic
Circuit.When needing that inductive current peak is turned up, the first reference voltage Vref 1 is turned up, when needing to turn down inductive current peak,
Turn down the first reference voltage Vref 1.
In addition, in the embodiment shown in Figure 2, the first ratio T2 and reference value Kref being converted to voltage signal and compared
Compared in other examples, being also possible to directly carry out the comparison of the time other modes such as relatively, in the utility model
In protection scope.
The utility model is suitable for the output Isobarically Control of isolated and non-isolated switch, and in isolation type switching power supply
In, 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
It is more 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 (12)
1. a kind of switching power source control circuit, it is characterised in that: according to the afterflow of the service time of main switch and auxiliary switch pipe
Time, obtain the first ratio, first ratio be detect the service time of service time of main switch than main switch and
The sum of the time of afterflow of auxiliary switch pipe；
According to the first ratio and corresponding reference value, the output electric current of regulating switch power supply, thus control switch electric power output voltage
For predeterminated voltage.
2. switching power source control circuit according to claim 1, it is characterised in that: detect the input electricity of the Switching Power Supply
Pressure sets the reference value according to input voltage and the predeterminated voltage, and the reference value subtracts with the increase of input voltage
It is small.
3. switching power source control circuit according to claim 2, it is characterised in that: under discontinuous conduct mode, pass through tune
The service time or/and first time of section inductive current peak or main switch adjust the output electric current of the Switching Power Supply, institute
State the time being turned off at the first time for main switch and auxiliary switch pipe.
4. switching power source control circuit according to claim 2, it is characterised in that: under continuous current mode, pass through tune
The service time or/and inductive current valley of section inductive current peak or main switch adjust the output electricity of the Switching Power Supply
Stream.
5. switching power source control circuit according to claim 3, it is characterised in that:
When the first ratio is greater than reference value, reduces inductive current peak or shorten service time or/and the extension of main switch
At the first time, so that output voltage declines；
When the first ratio is less than reference value, increases inductive current peak or extend service time or/and the shortening of main switch
At the first time, so that output voltage rises.
6. switching power source control circuit according to claim 4, it is characterised in that:
When the first ratio is greater than reference value, reduces inductive current peak or shorten service time or/and the reduction of main switch
The valley of inductive current, so that output voltage declines；
When the first ratio is less than reference value, increases inductive current peak or extend service time or/and the increase of main switch
The valley of inductive current, so that output voltage rises.
7. switching power source control circuit according to claim 5, 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 signal of the first ratio of characterization, institute
The second input terminal for stating error amplifier receives the voltage signal of characterization reference value, and the output end connection of the error amplifier is prolonged
The input terminal of slow circuit, the output end of the delay circuit pass through the control terminal of logic circuit connection switch power main switch pipe,
The delay circuit is adjusted at the first time.
8. switching power source control circuit according to claim 7, it is characterised in that: the switching power source control circuit also wraps
It includes peak value and adjusts circuit or service time adjusting circuit, the peak value adjusts circuit or service time adjusts the input terminal company of circuit
The output end of error amplifier is connect, the peak value adjusts circuit or the output end of service time adjusting circuit passes through logic circuit company
The control terminal of Switching Power Supply main switch is connect, the peak value adjusts circuit and adjusts inductive current peak, and the service time is adjusted
The service time of circuit adjusting main switch.
9. switching power source control circuit according to claim 5 or 6, it is characterised in that: the switching power source control circuit
Circuit is adjusted including error amplifier and peak value or service time adjusts circuit, and the first input end of the error amplifier receives
The voltage signal of the first ratio is characterized, the second input terminal of the error amplifier receives the voltage signal of characterization reference value, institute
It states error amplifier output and connects the input terminal that the peak value adjusts circuit or service time adjusts circuit, the peak value is adjusted
The output end that circuit or service time adjust circuit passes through the control terminal of logic circuit connection switch power main switch pipe, the peak
Value adjusts circuit and adjusts inductive current peak, and the service time adjusts the service time that circuit adjusts main switch.
10. switching power source control circuit according to claim 9, it is characterised in that: the switching power source control circuit is also
Circuit is adjusted including valley, the valley adjusts the output end of the input terminal connection error amplifier of circuit, and the valley is adjusted
The output end of circuit passes through the control terminal of logic circuit connection switch power main switch pipe, and the valley adjusts circuit and adjusts inductance
Electric current valley.
11. switching power source control circuit according to claim 6, it is characterised in that: the switching power source control circuit packet
It includes error amplifier and valley adjusts circuit, the first input end of the error amplifier receives the voltage letter of the first ratio of characterization
Number, the second input terminal of the error amplifier receives the voltage signal of characterization reference value, the output end of the error amplifier
The input terminal that valley adjusts circuit is connected, the output end that the valley adjusts circuit is opened by logic circuit connection switch power supply master
The control terminal of pipe is closed, the valley adjusts circuit and adjusts inductive current valley.
12. a kind of Switching Power Supply, which is characterized in that including any one switching power source control circuit of claim 1-11 and power
Circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821595751.2U CN209120051U (en) | 2018-09-28 | 2018-09-28 | A kind of switching power source control circuit and Switching Power Supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821595751.2U CN209120051U (en) | 2018-09-28 | 2018-09-28 | A kind of switching power source control circuit and Switching Power Supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209120051U true CN209120051U (en) | 2019-07-16 |
Family
ID=67199834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821595751.2U Active CN209120051U (en) | 2018-09-28 | 2018-09-28 | A kind of switching power source control circuit and Switching Power Supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209120051U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109120139A (en) * | 2018-09-28 | 2019-01-01 | 杰华特微电子（杭州）有限公司 | A kind of switching power source control circuit and method and Switching Power Supply |
-
2018
- 2018-09-28 CN CN201821595751.2U patent/CN209120051U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109120139A (en) * | 2018-09-28 | 2019-01-01 | 杰华特微电子（杭州）有限公司 | A kind of switching power source control circuit and method and Switching Power Supply |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103154843B (en) | There is the power converter of voltage boosting-reducing-buck configuration | |
| CN204068695U (en) | Power conversion system | |
| CN109152158B (en) | Constant voltage-to-constant current driving circuit capable of automatically adapting to input and output changes | |
| DE102009037859B4 (en) | Input circuit for an electrical device, use of an input circuit and electrical device | |
| CN103166464A (en) | Power converter and power conversion method | |
| CN107742983B (en) | Constant-current constant-voltage control module, voltage reducing circuit and compensation method for sharing compensation | |
| KR20150044501A (en) | Pfc control circuit, active pfc circuit and method for controlling pfc | |
| CN101060753B (en) | A drive circuit for adjusting backlight brightness | |
| CN202711109U (en) | Compensation circuit for remote-end voltage stabilization by using feedback loop | |
| CN109120139A (en) | A kind of switching power source control circuit and method and Switching Power Supply | |
| CN106685193B (en) | High pressure LDO circuit based on charge pump | |
| CN209120051U (en) | A kind of switching power source control circuit and Switching Power Supply | |
| CN209375983U (en) | A kind of constant pressure that can adapt to output and input variation automatically turns constant-current drive circuit | |
| CN110247563A (en) | AC-DC conversion circuit and method and charger | |
| CN114340077A (en) | LED dimming circuit, dimming LED lamp and LED dimming method based on LED dimming circuit | |
| CN208971373U (en) | Switching power source control circuit and Switching Power Supply | |
| CN106954307B (en) | A kind of PWM light adjusting circuits for High Power Factor primary side feedback LED drive power | |
| CN105958825B (en) | A kind of primary current control driving circuit | |
| CN104253956A (en) | Low-power-consumption stable voltage backlight control circuit and television | |
| CN215453343U (en) | Dimming circuit capable of stabilizing output voltage | |
| CN104253955A (en) | Low-power-consumption constant current and stable voltage control circuit and television | |
| CN216391470U (en) | Voltage-regulating type multi-output dimming power supply conforming to American standard CLASS2 | |
| CN113329543A (en) | Dimming circuit capable of stabilizing output voltage | |
| CN110719073B (en) | Hybrid envelope modulation method and circuit applied to radio frequency power amplifier | |
| CN107769524A (en) | power supply circuit and switching power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
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 Patentee after: Jiehuate Microelectronics Co.,Ltd. Address before: Room 424, building 1, 1500 Wenyi West Road, Cangqian street, Yuhang District, Hangzhou City, Zhejiang Province Patentee before: JOULWATT TECHNOLOGY (HANGZHOU) Co.,Ltd. |