CN209435105U - A kind of soft starting circuit and electronic equipment - Google Patents
A kind of soft starting circuit and electronic equipment Download PDFInfo
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- CN209435105U CN209435105U CN201920216706.XU CN201920216706U CN209435105U CN 209435105 U CN209435105 U CN 209435105U CN 201920216706 U CN201920216706 U CN 201920216706U CN 209435105 U CN209435105 U CN 209435105U
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Abstract
The utility model discloses a kind of soft starting circuit and electronic equipments, and by the way that soft-start module to be connected to the soft start pin of IC chip, power module connects the control pin of IC chip；Soft-start module is used to adjust the control voltage for the soft start pin for being applied to IC chip, so that working condition of the IC chip according to control voltage setting power module during soft start.The technical solution of the present embodiment makes initial baseline voltage with regard to sufficiently high, and it exports electric current slowly to rise, solve the too long of the rising duration design of start-up course in the prior art, caused Switching Power Supply work has the case where interval, and the case where rising duration design of start-up course is too short, and capacitor electrolysis transient voltage is caused to run out of, and backlight flashes, realize the control of the climbing speed of soft start voltage and the initial position of oblique wave so that soft starting circuit using more flexible.
Description
Technical field
The utility model embodiment is related to power supply control technology field more particularly to a kind of soft starting circuit and electronics is set
It is standby.
Background technique
With the fast development of integrated circuit (integrated circuit, IC), IC chip is in power supply control field
Use scope is more and more extensive.IC chip is reasonably used, the trouble of power supply design, debugging aspect can be saved, can also be mentioned
The reliability of high system shortens the R&D cycle of product.
Wherein, the IC chip for control switch power supply usually has soft start function.In the prior art, mainly pass through IC
The soft start pin of chip realizes soft start function.For example, when 12 pins of IC chip are soft start pin, the IC chip
12 pins are generally grounded by external capacitor, have the function of the setting of soft start, so that being exported during booting to negative
The electric current of load does not reach maximum value not instead of at once, slowly rises, and can adjust by adjusting the capacitance of external capacitor
The rise time of start-up course.
However, there are the following problems for discovery: if the rising of start-up course during inventor states scheme in realization
Time is designed too long, causes the current reference initially loaded very low, is easy to be interfered so that Switching Power Supply work occur has
The case where interval.If the rise time of start-up course is designed too short, when low temperature booting, opens moment and draw load very
Fastly, capacitor is caused to be electrolysed the case where transient voltage is in short supply, and backlight flashes.
Utility model content
In view of this, the present invention provides a kind of soft starting circuit and electronic equipments, to solve existing soft starting circuit
Middle external capacitor setting is improper, and caused Switching Power Supply has working clearance or backlight flicker.
In a first aspect, the utility model embodiment provides a kind of soft starting circuit, comprising: power module, integrated circuit
IC chip and soft-start module, the soft-start module connect the soft start pin of the IC chip, the power module connection
The control pin of the IC chip；Wherein, the soft-start module, for adjusting the soft start pin for being applied to the IC chip
Control voltage so that IC chip sets work shape of power module during soft start according to the control voltage
State.
Further, the soft-start module includes the first soft start submodule and the second soft start submodule, and described the
The soft start of the first end of one soft start submodule and the first end of the second soft start submodule with the IC chip draws
The second end of foot connection, the second end of the first soft start submodule and the second soft start submodule is grounded.
Preferably, the soft-start module includes: first resistor and first capacitor；Wherein, the first of the first resistor
End connects the soft start pin of the IC chip, and second end connects the first end of the first capacitor, and the of the first capacitor
Two ends ground connection.
Preferably, the soft-start module includes: second resistance and the second capacitor；Wherein, the first of second capacitor
End connects the soft start pin of the IC chip, and second end connects the first end of the second resistance, and the of second capacitor
Two ends ground connection.
Further, the first resistor is used to adjust the initial baseline voltage of the power module, the initial baseline
Voltage is the output voltage when movement of the power module starts；The first capacitor is used to adjust the rising of soft start-up process
Duration.
Further, the second resistance is used to adjust the initial baseline voltage of the power module, the initial baseline
Voltage is the output voltage when movement of the power module starts；Second capacitor is used to adjust the rising of soft start-up process
Duration.
Further, the power module includes switch element, the control pin and the switch element of the IC chip
Connection；The IC chip, for setting connection and pass of the switch element during soft start according to the control voltage
The disconnected time.
It further, include power supply unit, first comparator and transistor in the IC chip；The soft-start module is logical
Cross the soft start pin of IC chip, respectively with the power supply unit, the end in the same direction of the first comparator and the transistor
First end connection；The backward end of the first comparator inputs the first predeterminated voltage.
Further, when the movement of the power module starts, the power supply subelement is drawn by the soft start of IC chip
Foot charges to the soft-start module；It is described soft to open when the voltage of the soft start pin is more than the first predeterminated voltage
Dynamic circuit terminates soft start.
Second aspect, the utility model embodiment additionally provide a kind of electronic equipment, and the electronic equipment includes as above-mentioned
Any soft starting circuit in first aspect.
A kind of soft starting circuit and electronic equipment that above-mentioned utility model embodiment provides, by connecting soft-start module
The soft start pin of IC chip, power module connect the control pin of IC chip；Soft-start module is applied to IC core for adjusting
The control voltage of the soft start pin of piece, so that work of the IC chip according to control voltage setting power module during soft start
Make state.As it can be seen that the utility model can be by adjusting the control voltage being applied on the soft start pin of IC chip, so that IC core
Piece is according to working condition of control voltage setting power module during soft start, so that initial baseline voltage is with regard to sufficiently high,
Avoid current reference in the prior art it is low be easy to appear Switching Power Supply work have the case where interval, that is, solve in the prior art
Switching Power Supply work caused by the rise time design of start-up course is too long has the problem of interval；And the output electricity of power module
Stream slowly rises, and so as to the problem for avoiding large-scale (Bulk) capacitor electrolysis transient voltage in short supply, that is, solves existing skill
Bulk capacitor electrolysis transient voltage caused by the rise time design of start-up course is too short in art is run out of, what flashing occurred in backlight
Problem realizes the control of the climbing speed of soft start voltage and the initial position of oblique wave, so that the application of soft starting circuit is more
Add flexibly.
Detailed description of the invention
Fig. 1 is the functional block diagram of one of the utility model embodiment soft starting circuit；
Fig. 2 is the structural schematic diagram of one of the utility model alternative embodiment soft starting circuit；
Fig. 3 is the structural schematic diagram of one of the utility model alternative embodiment IC chip internal circuit；
Fig. 4 is the variation schematic diagram of soft start pin voltage before one of the utility model embodiment is not optimised；
Fig. 5 is the variation schematic diagram of soft start pin voltage after the optimization of one of the utility model embodiment；
Fig. 6 is the structural schematic diagram of one of the utility model alternative embodiment soft starting circuit；
Fig. 7 is the structural schematic diagram of one of the utility model alternative embodiment soft starting circuit.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples.It is understood that herein
Described specific embodiment is used only for explaining the utility model, rather than the restriction to the utility model.It further needs exist for
It is bright, part relevant to the utility model is illustrated only for ease of description, in attached drawing rather than entire infrastructure.
Fig. 1 is the functional block diagram of one of the utility model embodiment soft starting circuit；The present embodiment is applicable to out
The case where closing soft start, which is arranged in the control circuit of electronic equipment, connect with IC chip.
Specifically, as shown in Figure 1, soft starting circuit provided in this embodiment includes, power module 110, Integrated circuit IC
Chip 120 and soft-start module 130, soft-start module 130 connect the soft start pin of IC chip 120, and power module 110 connects
The control pin of IC chip 120；Wherein, soft-start module 130, for adjusting the soft start pin for being applied to IC chip 120
Voltage is controlled, so that working condition of the IC chip 120 according to control voltage setting power module 110 during soft start.
In the present embodiment, soft start, which refers to, slowly expands when power module 110 starts for driving switch element
Export the control of the turn-on time of pulse.Further, soft start pin is connect with peripheral circuit, according to the time of peripheral circuit
Constant sets the duration during soft start.Specifically, stabilized power source is connected in the inside of soft start pin, it is constant according to this
The value of power supply and the capacitance of peripheral hardware capacitor, determine the charge constant of capacitor, so determine during soft start when
It is long.When power module 110 has just started movement, power module 110 and IC chip 120 enter soft start stage, control switch
The pulse width of element is slowly increased, and the turn-on time of switch element slowly rises during soft start, the output of power module 110
Voltage or output electric current slowly rise, and the surge current so as to avoid the moment opened from occurring is burnt in power module 110
Element or load situation.Further, the time span during soft start can be set according to the power of load
Meter.Preferably, the time span during soft start is 20 milliseconds of (Millisecond, ms)~30ms.
In the present embodiment, IC chip 120 be by a large amount of microelectronic component, such as: transistor, resistance, capacitor etc.,
The integrated circuit of formation is placed on one piece of modeling base, is made into chip piece.In the present embodiment, IC chip 120 preferably has soft
Start pin, can be realized the IC chip of soft start function.In the present embodiment, only IC chip is illustrated, and it is non-limiting.?
In practical application, the IC chip with soft start pin can be selected according to the actual conditions of Switching Power Supply.Illustratively, this reality
The model for applying IC chip in example can be BD9412F.
Further, the upper control electricity of the adjustable soft start pin for being applied to IC chip 120 of soft-start module 130
Pressure, so that the initial baseline voltage of power module 110 is sufficiently high, avoids the section for being easy to be disturbed, avoids Switching Power Supply
Work has the case where gap.Specifically, the present embodiment adjusts the soft start for being applied to IC chip 120 by soft-start module 130
The upper control voltage of pin, so that the voltage value of power module 110 output to load is not started from scratch, but from fixed
Voltage value starts to increase, to avoid the section for being easy to be disturbed, avoiding Switching Power Supply work has the case where gap.Into one
Step, soft-start module 130 can also adjust the time span during soft start, so that the output voltage of power module 110 can
Slowly to rise, the moment for avoiding power module 110 from opening draws load too fast, and Bulk capacitor electrolysis transient voltage is caused to supply
On not, the problem of backlight flashes.
It should be noted that only soft-start module 130 is illustrated in the present embodiment, and it is non-limiting, it can basis
The actual application environment and design requirement of soft starting circuit design the circuit structure of soft-start module 130.
A kind of soft starting circuit provided by the embodiment of the utility model, by opening soft-start module connection the soft of IC chip
Dynamic pin, power module connect the control pin of IC chip；Soft-start module is applied to the soft start of IC chip and draws for adjusting
The control voltage of foot, so that working condition of the IC chip according to control voltage setting power module during soft start.As it can be seen that
The utility model can be by adjusting the control voltage being applied on the soft start pin of IC chip, so that IC chip is according to control electricity
Working condition of pressure setting power module during soft start avoids existing skill so that initial baseline voltage is just sufficiently high
Current reference is low in art is easy to appear Switching Power Supply work and has the case where interval, that is, solves the upper of start-up course in the prior art
Rising the too long caused Switching Power Supply work of time design has the problem of interval.In addition, in the utility model power module output
Electric current slowly rises, and so as to the problem for avoiding large-scale (Bulk) capacitor electrolysis transient voltage in short supply, that is, solves existing
The too short caused Bulk capacitor electrolysis transient voltage of the rise time design of start-up course is run out of in technology, and backlight flashes
The problem of, the control of the climbing speed of soft start voltage and the initial position of oblique wave is realized, so that the application of soft starting circuit
It is more flexible.
Fig. 2 is the structural schematic diagram of one of the utility model alternative embodiment soft starting circuit；As shown in Fig. 2,
In the present embodiment, preferably the SS pin of IC chip 120 is soft start pin.Further, soft-start module 130 includes: first
Resistance R1 and first capacitor C1；Wherein, the soft start pin SS of the first end connection IC chip 120 of first resistor R1, second end
Connect the first end of first capacitor C1, the second end ground connection of first capacitor C1.It should be noted that the SS pin of IC chip 120 is
Soft start pin is only a preferred embodiment, is not defined to the pin of IC chip, according to the function and type of different IC chips
Number, IC chip has soft start pin.
In the present embodiment, first resistor R1 is used to adjust the initial baseline voltage of power module 110, initial baseline voltage
It is the output voltage when movement of power module 120 starts；First capacitor C1 is used to adjust the rising duration of soft start-up process.
Further, different initial baseline voltage is arranged in the resistance value that can be adjusted according to the needs first resistor R1, meets
Different types of circuit requirements.The capacitance of first capacitor C1 can also be adjusted, the charge constant of first capacitor C1 is increased,
Rise duration to extend soft start, the output voltage of power module 110 is allowed slowly to increase, avoids to Bulk capacitor electricity
Solution forms excessive impact.
Further, power module 110 includes switch element, and the control pin of IC chip 120 is connect with switch element；IC
Chip 120, for turning on and off the time during soft start according to control voltage configuration switch element.
Specifically, Fig. 3 is the structural schematic diagram of one of the utility model alternative embodiment IC chip internal circuit；Such as
It include power supply subelement Iss, first comparator 301 and transistor Q1 in IC chip shown in Fig. 3；Soft-start module 130 passes through IC
The soft start pin SS of chip, respectively with the first of power supply subelement Iss, the end in the same direction of first comparator 301 and transistor Q1
End connection；The backward end of first comparator 301 inputs the first predeterminated voltage.
In the present embodiment, power supply subelement Iss, which refers to, can provide the circuit of power supply for soft-start module 130, at this
In embodiment, power supply subelement Iss is preferably current source circuit.In the present embodiment, only power supply subelement Iss is illustrated,
And it is non-limiting, it can according to need and design other kinds of power supply unit Iss with actual conditions.First predeterminated voltage can be by steady
Constant voltage source provides, and can also acquire the voltage value in power module 110, in the present embodiment, not to providing the first predeterminated voltage
Circuit be defined.Further, when the voltage of soft start pin SS is more than the first predeterminated voltage, circuit terminates soft open
It is dynamic, into steady operational status.Preferably, the first predeterminated voltage is 2.5V.
In the present embodiment, when the movement of power module starts, power supply subelement Iss is opened by the soft of IC chip 120
Dynamic pin SS charges to soft-start module 130.When the voltage of soft start pin SS is more than the first predeterminated voltage, soft start
Circuit terminates soft start, power module 110 and IC chip 120 and its periphery connection circuit enters steady operational status.
In the present embodiment, during soft starting circuit enters soft start and power module 110 and IC chip 120 and its
During periphery connection circuit enters stable operation, transistor Q1 is disconnected.When power module 110 stops working, i.e., no longer to load
When power supply, a conductivity control signal is generated, for controlling transistor Q1 conducting, first capacitor C1 is allowed to pass through transistor
Q1 ground connection, forming circuit discharge the quantity of electric charge in first capacitor C1, i.e. first capacitor C1 is discharged over the ground by transistor Q1.This
Sample, when the circuit start next time that can make, the quantity of electric charge of first capacitor C1 is 0, can preferably enter the soft start stage.Into
One step, transistor Q1 can be triode, field-effect tube, insulated gate bipolar transistor etc., not to crystal in the present embodiment
The type of pipe Q1 is defined.
In the present embodiment, before soft starting circuit is not optimized, power supply subelement Iss passes through IC chip 120
Soft start pin SS charges to capacitor, at this point, the voltage of soft start pin SS is Vss1=Iss × t1/C, wherein Vss1
For the voltage of soft start pin SS before being not optimised, Iss is the constant current value that power supply subelement Iss is provided, and t1 is to be not optimised
The time constant of circuit before, C are the capacitance of soft start pin SS ground capacity before being not optimised.
Fig. 4 is the variation schematic diagram of soft start pin voltage before one of the utility model embodiment is not optimised；Such as
Shown in Fig. 4, the variation tendency of the voltage Vss1 of soft start pin SS is as shown in line segment 401 before being not optimized, i.e. soft start
The voltage Vss1 of pin SS is begun to ramp up from 0.In this way, make load initial baseline voltage it is very low, be easy to be interfered so that
Switching Power Supply work occur the case where interval.
In the present embodiment, after soft starting circuit optimizes, power supply subelement Iss is soft by IC chip 120
Starting pin SS charge to soft-start module 130, i.e. power supply subelement Iss provide electric current not only to first capacitor C1 into
Row charging, meanwhile, flow through ground connection after first resistor R1.In this way, the voltage of soft start pin SS is Vss2=Iss × t2/C1,
Wherein, Vss2 is the voltage of soft start pin SS after optimization, and Iss is the constant current value that power supply subelement Iss is provided, and t2 is
After optimization, the time constant of circuit, C1 is the capacitance of soft start pin SS ground capacity after optimization.
Specifically, Fig. 5 is the variation signal of soft start pin voltage after the optimization of one of the utility model embodiment
Figure；As shown in figure 5, the variation tendency of the voltage Vss2 of soft start pin SS is as shown in line segment 501, i.e., soft to open after optimizing
The voltage Vss2 of dynamic pin SS is begun to ramp up from voltage V1.In this way, making the initial baseline voltage of load sufficiently high, appearance is avoided
Vulnerable to the section of interference, avoiding Switching Power Supply work has the case where gap.Further, it can be adjusted according to the needs the first electricity
The resistance value for hindering R1, is arranged different initial baseline voltage, meets different types of current needs.
Further, the capacitance of adjustable first capacitor C1 increases the charge constant of first capacitor C1, increases
Time span during soft start rises the output voltage of power module 110 slowly, avoids to Bulk capacitor electricity
Solution forms excessive impact.
It further, further include the second comparator 302 inside IC chip, the end in the same direction of the second comparator 302 is opened by soft
Dynamic pin SS is connect with soft-start module 130, and the backward end of the second comparator 302 exports the second predeterminated voltage.In the present embodiment
In, the second predeterminated voltage is 2.0V.Further, when the movement of power module starts, power supply subelement Iss passes through IC chip
120 soft start pin SS charges to soft-start module 130, when the voltage of soft start pin SS is less than 2.0V, IC core
The built-in protection circuits of piece and the periphery protection circuit connecting with IC chip are without work.When the voltage of soft start pin SS
When greater than 2.0V, built-in protection circuit and the periphery protection circuit connecting with IC chip carry out working condition in IC chip.
This way it is possible to avoid protection misoperation occurs, the stability and reliability of enhancing power module operation.
Further, Fig. 6 is the structural schematic diagram of one of the utility model alternative embodiment soft starting circuit；Such as figure
Shown in 6, soft-start module 130 includes: second resistance R2 and the second capacitor C2；Wherein, the first end of the second capacitor C2 connects IC
The soft start pin of chip 120, second end connect the first end of second resistance R2, the second end ground connection of second resistance R2.
Further, second resistance R2 is used to adjust the initial baseline voltage of power module 110, and initial baseline voltage is electricity
The output voltage when movement of source module 110 starts；Second capacitor C2 is used for the rising duration of soft start-up process.The present embodiment
In, only the order of connection of resistance and capacitor is adjusted, working principle does not change.
Further, Fig. 7 is the structural schematic diagram of one of the utility model alternative embodiment soft starting circuit；Such as figure
Shown in 7, soft-start module 130 includes the first soft start submodule 1301 and the second soft start submodule 1302, the first soft start
The first end of submodule 1301 and the first end of the second soft start submodule 1302 connect with the soft start pin of IC chip 120
It connects, the second end of the second end of the first soft start submodule 1301 and the second soft start submodule 1302 is grounded.
Further, the situation of two soft start submodule parallel connections is merely provided in the present embodiment, but in the reality of circuit
In the application process of border, n soft start submodule parallel connection can be designed, the present embodiment is not specifically limited this.Wherein, n is big
In 1 integer.
Further, as shown in fig. 7, each soft start submodule includes a resistance and a capacitor.Illustratively,
First soft start submodule 1301 includes 3rd resistor R3 and third capacitor C3, and the second soft start submodule 1302 includes the 4th electricity
R4 and the 4th capacitor C4 is hindered, the n-th soft start submodule 1303 includes the 5th resistance R5 and the 5th capacitor C5.Each soft start submodule
The capacity of the resistance value of resistance and capacitor can be chosen as needed in block.
The scheme of multiple soft start submodule parallel connections provided in this embodiment is suitable for the soft start-up process of complicated circuit, or
The soft start-up process of person's complexity can select soft start submodule according to the usage scenario and concrete condition of soft starting circuit
Number, the present embodiment are not specifically limited this.
The utility model embodiment additionally provides a kind of electronic equipment, and the electronic equipment includes as mentioned in above-described embodiment
Any soft starting circuit supplied.
Soft starting circuit provided by the utility model any embodiment can be performed in above-mentioned electronic equipment, and it is above-mentioned to have execution
The corresponding functional module of soft starting circuit and beneficial effect.
Note that above are only the preferred embodiment and institute's application technology principle of the utility model.Those skilled in the art's meeting
Understand, the utility model is not limited to specific embodiment described here, is able to carry out for a person skilled in the art various bright
Aobvious variation, readjustment and substitution is without departing from the protection scope of the utility model.Therefore, although passing through above embodiments
The utility model is described in further detail, but the utility model is not limited only to above embodiments, is not departing from
It can also include more other equivalent embodiments in the case that the utility model is conceived, and the scope of the utility model is by appended
Scope of the claims determine.
Claims (10)
1. a kind of soft starting circuit characterized by comprising power module, IC chip and soft-start module, it is described
Soft-start module connects the soft start pin of the IC chip, and the power module connects the control pin of the IC chip；
Wherein, the soft-start module, for adjusting the control voltage for being applied to the soft start pin of the IC chip, so that IC
Chip sets working condition of power module during soft start according to the control voltage.
2. soft starting circuit according to claim 1, which is characterized in that the soft-start module includes the first soft start
The of module and the second soft start submodule, the first end of the first soft start submodule and the second soft start submodule
One end is connect with the soft start pin of the IC chip, and the second end of the first soft start submodule and described second soft opens
The second end of mover module is grounded.
3. soft starting circuit according to claim 1, which is characterized in that the soft-start module include: first resistor and
First capacitor；
Wherein, the first end of the first resistor connects the soft start pin of the IC chip, second end connection first electricity
The first end of appearance, the second end ground connection of the first capacitor.
4. soft starting circuit according to claim 1, which is characterized in that the soft-start module include: second resistance and
Second capacitor；
Wherein, the first end of second capacitor connects the soft start pin of the IC chip, second end connection second electricity
The first end of resistance, the second end ground connection of the second resistance.
5. soft starting circuit according to claim 3, which is characterized in that
The first resistor is used to adjust the initial baseline voltage of the power module, and the initial baseline voltage is the power supply
The output voltage when movement of module starts；
The first capacitor is used to adjust the rising duration of soft start-up process.
6. soft starting circuit according to claim 4, which is characterized in that the second resistance is for adjusting the power supply mould
The initial baseline voltage of block, the initial baseline voltage are the output voltages when movement of the power module starts；
Second capacitor is used to adjust the rising duration of soft start-up process.
7. soft starting circuit according to claim 1, which is characterized in that the power module includes switch element, described
The control pin of IC chip is connect with the switch element；
The IC chip, for setting the switch element turning on and off during soft start according to the control voltage
Time.
8. soft starting circuit according to claim 1, which is characterized in that include power supply unit, first in the IC chip
Comparator and transistor；
The soft-start module by the soft start pin of IC chip, respectively with the power supply unit, the first comparator
End is connected with the first end of the transistor in the same direction；The backward end of the first comparator inputs the first predeterminated voltage.
9. soft starting circuit according to claim 8, which is characterized in that
When the movement of the power module starts, the power supply unit gives the soft start mould by the soft start pin of IC chip
Block charges；
When the voltage of the soft start pin is more than the first predeterminated voltage, the soft starting circuit terminates soft start.
10. a kind of electronic equipment, which is characterized in that the electronic equipment includes soft start as described in any one of claim 1 to 9
Circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201920216706.XU CN209435105U (en) | 2019-02-20 | 2019-02-20 | A kind of soft starting circuit and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920216706.XU CN209435105U (en) | 2019-02-20 | 2019-02-20 | A kind of soft starting circuit and electronic equipment |
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| CN209435105U true CN209435105U (en) | 2019-09-24 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111725985A (en) * | 2020-07-11 | 2020-09-29 | 青岛鼎信通讯股份有限公司 | Soft start control circuit applied to electric power product |
| CN113922654A (en) * | 2021-09-13 | 2022-01-11 | 深圳市创芯微微电子有限公司 | Soft start circuit, switching power supply device, and electronic device |
| CN114336887A (en) * | 2022-01-10 | 2022-04-12 | 苏州贝克微电子股份有限公司 | Power supply circuit with low cost and high reliability |
| CN116106600A (en) * | 2023-04-10 | 2023-05-12 | 上海灵动微电子股份有限公司 | System, circuit, method and equipment for controlling electric waveform on DUT (device under test) |
-
2019
- 2019-02-20 CN CN201920216706.XU patent/CN209435105U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111725985A (en) * | 2020-07-11 | 2020-09-29 | 青岛鼎信通讯股份有限公司 | Soft start control circuit applied to electric power product |
| CN113922654A (en) * | 2021-09-13 | 2022-01-11 | 深圳市创芯微微电子有限公司 | Soft start circuit, switching power supply device, and electronic device |
| CN113922654B (en) * | 2021-09-13 | 2023-09-22 | 深圳市创芯微微电子股份有限公司 | Soft start circuit, switching power supply device, and electronic device |
| CN114336887A (en) * | 2022-01-10 | 2022-04-12 | 苏州贝克微电子股份有限公司 | Power supply circuit with low cost and high reliability |
| CN116106600A (en) * | 2023-04-10 | 2023-05-12 | 上海灵动微电子股份有限公司 | System, circuit, method and equipment for controlling electric waveform on DUT (device under test) |
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