CN106207976A - Overcurrent protection chip and overcurrent protection circuit of power supply - Google Patents
Overcurrent protection chip and overcurrent protection circuit of power supply Download PDFInfo
- Publication number
- CN106207976A CN106207976A CN201510220733.0A CN201510220733A CN106207976A CN 106207976 A CN106207976 A CN 106207976A CN 201510220733 A CN201510220733 A CN 201510220733A CN 106207976 A CN106207976 A CN 106207976A
- Authority
- CN
- China
- Prior art keywords
- memory module
- overcurrent protection
- order
- correction data
- current
- 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.)
- Granted
Links
- 238000012937 correction Methods 0.000 claims abstract description 146
- 230000005611 electricity Effects 0.000 claims description 14
- 239000008186 active pharmaceutical agent Substances 0.000 description 27
- 238000010586 diagram Methods 0.000 description 8
- 230000007246 mechanism Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 241001269238 Data Species 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000006399 behavior Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Semiconductor Integrated Circuits (AREA)
Abstract
The invention provides an overcurrent protection chip and an overcurrent protection circuit of a power supply. The overcurrent protection chip comprises three input ends, a first memory module, a second memory module and a switching selection circuit. The three input terminals are respectively used for receiving the correction data, the first current load potential and the second current load potential. The switching selection circuit is used for comparing the correction data with the first current load potential and comparing the correction data with the second current load potential. Wherein the correction data is stored in one of the memory cells of the first memory module when the correction data corresponds to the first current load potential. When the correction data coincides with the second current load, the correction data is stored in one memory cell of the second memory module.
Description
Technical field
The present invention relates to overcurrent protection chip and the circuit overcurrent protection of a kind of power supply unit, especially
Relate to overcurrent protection chip and the overcurrent of a kind of power supply unit setting many group overcurrent protection values
Protection circuit.
Background technology
Power supply unit is used for supplying power supply to electronic installation, in order to avoid the load of electronic installation excessive and
Exceeding the safe bearing load scope of power supply unit, power supply unit would generally arrange an overcurrent protection (over
current protection；OCP) circuit, is used for detecting load current, and in load current higher than load
An overcurrent protection signal is exported during the upper limit, to notify that power supply unit carries out corresponding protective measure,
Such as shut down.
Refer to the circuit overcurrent protection 10 that Fig. 1, Fig. 1 are known power source supply be coupled to correct work
Schematic diagram when tool and load machine 120.Circuit overcurrent protection 10 is arranged in power supply unit, is used for
The overcurrent protection of power supply unit is provided.Overcurrent protection chip 100 is then provided for over current protection
Protect value 140, to set the circuit overcurrent protection 10 current value in time starting over current protection protection mechanism.When
The electric current that power supply unit is exported exceedes set overcurrent protection when being worth 140, overcurrent protection electricity
Road 10 i.e. can start its over current protection protection mechanism.For the overcurrent protection in response to different power supply units
Needing, overcurrent protection chip 100 is designed to be corrected its overcurrent protection value 140.When
Carry out the timing of overcurrent protection value 140, overcurrent protection chip 100 can with aligning tool 110 and
Load machine 120 couples, so that overcurrent protection chip 100 is entered by aligning tool 110 and load machine 120
Row correction, and make overcurrent protection chip 100 produce correction data 130 in completing timing.Correction
Can be stored in the middle of overcurrent protection chip 100 according to 130, and when overcurrent protection chip 100 dispatches from the factory
And after being arranged at power supply unit, overcurrent protection chip 100 can be according to the correction data stored
130 immediately produce overcurrent protection value 140, to set circuit overcurrent protection 10 in starting overcurrent
Current value during protection mechanism.
But, because, after overcurrent protection chip 100 dispatches from the factory, being stored in overcurrent protection chip 100
In correction data 130 i.e. cannot change again, and cause when power supply unit factory in produce its power supply supply
When must change its specification, design after device, overcurrent protection chip 100 in power supply unit also cannot be again
Again it is corrected to reclaim use.Furthermore, when power supply unit needs the overcurrent protection setting of many groups
Time, because overcurrent protection chip 100 can only provide one group of overcurrent protection value 140, and have and do not apply use
Situation.If additionally, power supply unit has many group overcurrent protection values 140 to need timing, load machine
The 120 correction orders that must coordinate multiple overcurrent protection chip 100, and cannot optionally change its school
Positive order, and lack flexibility.
Summary of the invention
The present invention provides the overcurrent protection chip of a kind of power supply unit.Overcurrent protection chip comprises
One input, the second input, the 3rd input, first memory module, second memory module with
And switching selecting circuit.First input end is in order to receive correction data.Second input is in order to receive first
Current loading current potential.3rd input is in order to receive the second current loading current potential.First memory module and
Second memory module respectively comprises at least one memory cell, and each memory cell is in order to record a mistake
Current protection value.Switching selecting circuit is coupled to first input end, the second input and the 3rd input,
In order to compare correction data and the first current loading current potential, and compare correction data and the second current loading electricity
Position.Wherein when correction data is consistent with the first current loading current potential, correction data is stored in first and deposits
In one memory cell of memory modules.When correction data is consistent with the second current loading current potential, school
Correction data is stored in a memory cell of second memory module.
The present invention also provides for the circuit overcurrent protection of a kind of power supply unit.Circuit overcurrent protection comprises
Multiple overcurrent protection chips, each of which overcurrent protection chip comprises first input end, second defeated
Enter end, the 3rd input, first memory module, second memory module, switching selecting circuit, groove
Position comparing unit, the first selection switch and second select switch.First input end is in order to receive correction
According to.Second input is in order to receive the first current loading current potential.3rd input is in order to receive the second electric current
Loaded level.First memory module and second memory module respectively comprise at least one memory cell, and
Each memory cell is in order to record an overcurrent protection value.Switching selecting circuit be coupled to first input end,
Second input and the 3rd input, in order to compare correction data and the first current loading current potential, and compare
Correction data and the second current loading current potential.Wherein when correction data is consistent with the first current loading current potential,
Correction data is stored in a memory cell of first memory module.When correction data and second
When current loading current potential is consistent, correction data is stored in a memory cell of second memory module
In.Groove position comparing unit is in order to the comparison order of comparison groove position and position, groove position, to export enable signal and to determine
Determine the current potential of enable signal.First selects switch in order to control first input end to switching according to enable signal
Electric connection between selection circuit and first memory module.Second selects switch in order to believe according to enable
Number control first input end to the electric connection between switching selecting circuit and second memory module.Wherein
The groove position comparing unit of above-mentioned multiple overcurrent protection chip is coupled to each other, and receiving slit position comparison respectively
Order and position, groove position.
Accompanying drawing explanation
Fig. 1 is that the circuit overcurrent protection of known power source supply is when being coupled to aligning tool and load machine
Schematic diagram.
Fig. 2 is that the circuit overcurrent protection of the power supply unit of one embodiment of the invention is coupled to aligning tool
And schematic diagram during load machine.
Fig. 3 is the schematic diagram of the switching selecting circuit of the overcurrent protection chip of one embodiment of the invention.
Fig. 4 is that the circuit overcurrent protection of the power supply unit of another embodiment of the present invention is coupled to correct work
Schematic diagram when tool and load machine.
Fig. 5 is flow chart when being corrected of the overcurrent protection chip to Fig. 2.
Fig. 6 is flow charts when being corrected of the multiple overcurrent protection chips to Fig. 4.
Fig. 7 be the power supply unit to the overcurrent protection chip being provided with Fig. 2 by calibration setup to dispatching from the factory
Flow chart.
[symbol description]
10,20,30 circuit overcurrent protection
110 aligning tools
120 load machines
130、130A、130B、130C、130D、DSCorrection data
140,240A, 240B, 240C, 240D overcurrent protection value
100,200,200_1,200_2 overcurrent protection chip
210 switching selecting circuits
212A, 212B load comparing unit
214 correction group selectores
216 comparators
217 current potential adjustment units
218 decoders
220 groove position comparing units
224A first memory module
224B second memory module
230A, 230B heavy industry selector
A1 to AX, B1 to BX memory cell
EN1、EN2Enable signal
IA1Load current
IA2Electric current
Iv1 to Ivn current source
P1 to P3 input
VA1First current loading current potential
VA2First correcting current induced potential
VB1Second current loading current potential
VB2Second correcting current induced potential
VC13rd current loading current potential
VC23rd correcting current induced potential
VD14th current loading current potential
VD24th correcting current induced potential
VS1First output level
VS2Second output level
Vcs voltage input end
V1 to Vn switch controlling signal
RA1、RA2、RB2、RC2、RD2Resistance
Position, S1, S2 groove position
SCOMThe comparison order of groove position
SW1、SW2Select switch
SW、SWA、SWBSwitch
S410 to S460, S510 to S550, S610 to S670 step
T1 to T3 input
Detailed description of the invention
Refer to Fig. 2.Fig. 2 is the circuit overcurrent protection 20 of the power supply unit of one embodiment of the invention
It is coupled to schematic diagram when aligning tool 110 and load machine 120.Circuit overcurrent protection 20 is arranged at electricity
In the supply of source, for providing the overcurrent protection value of many groups of power supply unit.In the present embodiment, mistake
Current protecting circuit 20 has an overcurrent protection chip 200, and overcurrent protection chip 200 can carry
Overcurrent protection value 240A of power supply source supply two groups and 240B.But, the present invention not as
Limit, each overcurrent protection chip 200 may be designed as providing three groups or the overcurrent protection of more groups
Value.
By two groups of overcurrent protection values 240A provided and 240B, overcurrent protection chip 200 is i.e.
The circuit overcurrent protection 20 two groups of current values in time starting over current protection protection mechanism can be set.When power supply supplies
The two groups of power supplys answering device export its output electric current has arbitrary group to exceed set overcurrent protection value 240A
Or during 240B, circuit overcurrent protection 20 i.e. can start its over current protection protection mechanism.Similarly, for because of
The specification of the overcurrent protection of power supply unit that should be different needs, and overcurrent protection chip 200 is designed
Its overcurrent protection value 240A and 240B can be corrected by one-tenth respectively.When carrying out overcurrent protection value
The timing of 240A and 240B, overcurrent protection chip 200 can be with aligning tool 110 and load machine 120
Couple, so that overcurrent protection chip 200 is corrected by aligning tool 110 and load machine 120, and
Overcurrent protection chip 200 is made to produce correction data 130A and 130B in completing timing.Correction data
130A and 130B can be stored in first memory module 224A of overcurrent protection chip 200 respectively
And in second memory module 224B, and supply when overcurrent protection chip 200 dispatches from the factory and is arranged at power supply
After answering device, overcurrent protection chip 200 can be according to first memory module 224A and second memory
Correction data 130A and 130B that module 224B is stored immediately produce overcurrent protection value 240A
And 240B, to set the circuit overcurrent protection 20 two groups of current values in time starting over current protection protection mechanism.
In the present embodiment, overcurrent protection chip 200 comprises three input P1 to P3, first deposits
Memory modules 224A, second memory module 224B and switching selecting circuit 210.Three inputs
P1 to P3 is respectively in order to receive correction data D from aligning tool 110S, and receive from load machine 120
One current loading current potential VA1And the second current loading current potential VB1.Switching selecting circuit 210 couples overcurrent
Three input P1 to P3 of protection chip 200, in order to compare correction data DSAnd first current loading
Current potential VA1, and compare correction data DSAnd the second current loading current potential VB1.In the present embodiment,
One memory module 224A and second memory module 224B respectively comprise multiple memory cell A1 to AX
And B1 to BX, and each memory cell is in order to record an overcurrent protection value.Wherein, the first storage
The number of the memory cell that device module 224A and second memory module 224B are comprised can optionally be adjusted
Whole, such as first memory module 224A and second memory module 224B can the most only have one and deposit
Storage unit.
Additionally, the overcurrent protection school of overcurrent protection chip 200 is exactly based on switching selecting circuit 210
To correction data DS, the first current loading current potential VA1And the second current loading current potential VB1Compare
Mode is reached.In detail, in the process that overcurrent protection chip 200 is carried out overcurrent protection correction
In, before not yet completing the correction of current protection chip 200, aligning tool 110 can export constantly
Different correction datas DS, and when correction data DSWith the first current loading current potential VA1When being consistent, i.e.
Complete the correction of overcurrent protection value 240A；And when correction data DSWith the second current loading current potential VB1
When being consistent, i.e. complete the correction of overcurrent protection value 240B.As to how judge correction data DSWhether
The current loading current potential provided with load machine 120 is (such as VA1And/or VB1) be consistent, then refer to applicant
In No. 101139698 patent application case that on October 26th, 2012 is proposed, or later referring to right
Explanation in Fig. 3.Additionally, when correction data DSWith the first current loading current potential VA1When being consistent (such as:
Correction data D nowSFor correction data 130A), correction data DSFirst memory can be stored in
A memory cell in the memory cell A1 to AX of module 224A；And when correction data DS
With the second current loading current potential VB1When being consistent (such as: correction data D nowSFor correction data 130B),
Correction data DSCan be stored in the memory cell B1 to BX of second memory module 224B
One memory cell.Afterwards, overcurrent protection chip 200 can be according to being stored respectively in the first storage
Device module 224A and the correction data of second memory module 224B, export two groups of overcurrent protection values
240A and 240B.Due to overcurrent protection chip 200 can provide two groups current protection value 240A and
240B, therefore one group of overcurrent protection can only be provided compared to the overcurrent protection chip 100 in known technology
Value 140, overcurrent protection chip 200 is particularly suited for providing many group electric power to export (as organized difference more
Voltage) power supply unit.Additionally, due to first that load machine 120 is provided can be set severally
Current loading current potential VA1And the second current loading current potential VB1, and when correction data DSBear with the first electric current
Carry current potential VA1Or the second current loading current potential VB1When being consistent, i.e. complete overcurrent protection value 240A or
The correction of 240B, therefore overcurrent protection chip 200 current protection value 240A to be corrected and 240B
Sequencing can be different according to practical situation, and do not limited by specific correction order.Specifically
It, the correction that can first complete current protection value 240A completes the correction of current protection value 240B, also again
Or the correction first completing current protection value 240B completes the correction of current protection value 240A again.It addition,
If the first current loading current potential VA1It is configured to and the second current loading current potential VB1If Yi Yang, then
The setting of current protection value 240A and 240B can be completed simultaneously.
In an embodiment of the present invention, switching selecting circuit 210 comprises two load comparing unit 212A
And 212B, correction group selector 214 and two switch SWAAnd SWB.Load comparing unit 212A
And 212B is respectively by resistance RA2And RB2It is coupled to voltage input end Vcs.Load comparing unit 212A
Can be according to correction data DSAdjust the first correcting current induced potential V of load comparing unit 212AA2。
Similarly, load comparing unit 212B can be according to correction data DSAdjust load comparing unit 212B's
Second correcting current induced potential VB2.As for load comparing unit 212A and 212B how according to correction
Data DSAdjust the first correcting current induced potential V respectivelyA2And the second correcting current induced potential VB2,
Further instruction will be had below.Additionally, switch SWADeposit with first in order to control aligning tool 110
Electric connection between memory modules 224A, and switch SWBIn order to control aligning tool 110 and second
Electric connection between memory module 224B.Correction group selector 214 is coupled to two load comparing units
The outfan of 212A and 212B.Wherein as the first correcting current induced potential VA2Bear equal to the first electric current
Carry current potential VA1Time, SW opened by correction group selector 214A, so that correction data DSIt is stored in first
In one memory cell of memory module 224A.Similarly, when the second correcting current induced potential
VB2Equal to the second current loading current potential VB1Time, SW opened by correction group selector 214B, so that correction
According to DSIt is stored in a memory cell of second memory module 224B.
Hereinafter put up with and how to judge correction data DSThe current loading current potential whether provided with load machine 120
(such as VA1And/or VB1) being consistent is further described.Refer to Fig. 3, Fig. 3 is one embodiment of the invention
The schematic diagram of switching selecting circuit 212A of overcurrent protection chip.Load comparing unit 212A couples
In resistance RA1And RA2, and comprise three input T1 to T3, comparator 216, current potential adjustment unit
217 and decoder 218.Wherein, three input T1 to T3 are respectively coupled to overcurrent protection core
The input P2 of sheet 200, voltage input end Vcs and input P1, to receive the first current loading respectively
Current potential VA1, system voltage and correction data DS.Resistance RA1First end of (current sense resistor) couples
To voltage input end Vcs, and resistance RA1The second end be coupled to load machine 120.Resistance RA2First
End is coupled to voltage input end Vcs.The first current loading current potential V that input T1 is receivedA1Also it is electricity
Resistance RA1The voltage signal of the second end.Due to load current IA1Resistance R can be flowed throughA1, therefore resistance RA1
The first end and the second end between voltage drop can be proportional to load current IA1Size, so resistance RA1
Voltage signal (the i.e. first current loading current potential V of the second endA1) can be as load current detection signal.Defeated
Enter to hold T2 then in order to receive the first correcting current induced potential VA2, that is resistance RA2The electricity of the second end
Pressure signal.First correcting current induced potential VA2Size determined by current potential adjustment unit 217.Ratio
The relatively first input end of device 216 is coupled to input T1, and the second input of comparator 216 is coupled to defeated
Entering and hold T2, comparator 216 is in order to compare the first current loading current potential VA1And the first correcting current faradism
Position VA2To export the first output level V at its outfanS1.In the present embodiment, when the first current loading
Current potential VA1Less than the first correcting current induced potential VA2Time, the first output level VS1From low voltage level
It is raised to high-voltage level, that is exports an overcurrent protection signal at outfan, to notify power supply unit
Carry out corresponding protective measure, such as shutdown or other operations etc..
Current potential adjustment unit 217 is coupled to input T2, in the present embodiment, current potential adjustment unit 217
Comprise multiple current source Iv1 to Ivn and multiple switch SW.Multiple switch SW are respectively coupled to multiple
Between current source Iv1 to Ivn and earth terminal, in order to open according to switch controlling signal V1 to Vn
With closedown, flow through resistance R with controlA2Electric current IA2Size, and then adjust first correcting current sensing
Current potential VA2.Decoder 218 is in order to according to correction data D receivedSExport multiple switch controlling signal
V1 to Vn to multiple switch SW, to control the open and close of multiple switch SW.For example,
In the overcurrent protection setting state of power supply unit of the present invention, aligning tool 110 can provide one to make a reservation for
Load, makes by resistance RA1Load current IA1For upper loading limit.Aligning tool 110 can be via input
End T3 transmits correction data DSTo decoder 218.Correction data DSComprise multiple setting value, Mei Geshe
Definite value can be decoded as multiple switch controlling signal V1 to Vn by decoder 218, to control multiple switch SW
Open and close, and and then control flow through resistance RA2Electric current IA2Size (that is control the first school
Positive current induced potential VA2).Current potential adjustment unit 217 gradually adjusts the first correction according to multiple setting values
Electric current induced potential VA2, until the first output level V that comparator 216 is exportedS1During transition (such as
It is raised to high-voltage level from low voltage level, or drops to low voltage level from high-voltage level), this interval scale
First correcting current induced potential VA2Equal to or voltage level during fairly close upper loading limit, first is defeated
Go out level VS1Aligning tool 110 can be fed back to so that aligning tool 110 can learn the first output level VS1
Transition opportunity, and by corresponding correction data DSWrite and be stored in first memory module 224A
In, and become correction data 130A.The second output level V as load comparing unit 212BS2's
Transition mode, because of the first output level V with load comparing unit 212AS1Transition mode be similar to, therefore
Repeat no more.
In an embodiment of the present invention, overcurrent protection chip 200 can also comprise two heavy industry selectores
230A and 230B.Heavy industry selector 230A is in order to from multiple memorizeies of first memory module 224A
Unit A1 to AX selects the nearest correction data that first memory module 224A is stored, and
Heavy industry selector 230B is then in order to from multiple memory cell B1 to BX of second memory module 224B
In select the nearest correction data that second memory module 224B is stored.In other words, heavy industry choosing
Selecting device 230A and 230B only can be respectively from first memory module 224A and second memory module 224B
Select the correction data of state-of-the-art record, and other old correction datas can't be selected.When heavy industry selects
After device 230A and 230B selects the correction data of state-of-the-art record respectively, circuit overcurrent protection 20
Two groups of above-mentioned overcurrent protection values 240A and 240B are produced according to selected correction data.Additionally,
It is interesting to note that heavy industry selector 230A and 230B be respectively in response to first memory module 224A and
Second memory module 224B has multiple memory cell A1 to AX and B1 to BX to arrange.
In other words, in other embodiments of the present invention, if first memory module 224A and second stores
Device module 224B respectively only has if a memory cell, then need not arrange heavy industry selector 230A and
230B。
Although additionally, current protection chip 200 in the present embodiment is designed to provide the overcurrent of two groups
Protection value 240A and 240B.But, the present invention is not limited thereto, each overcurrent protection chip
200 may be designed as providing the overcurrent protection value of three groups or more groups.Wherein, often increase by one group the most electric
Stream protection value, only need to be reconfigured at a load comparing unit and memory module, and make load machine 120 again
The load comparing unit of another current loading current potential so far additional configuration is provided, then completes the wiring of correspondence
(such as: on-off control, signal transmit ... etc.).In detail, if in an embodiment of the present invention, electricity
If stream protection chip is designed to provide three groups of current protection values, then current protection chip is except above-mentioned
Three input P1 to P3 outside, can the most separately increase newly an input with receive load machine 120 carried
3rd current loading current potential of confession.Additionally, switching selecting circuit 210 can comprise another duty factor relatively again
Unit, in order to compare correction data Ds and the 3rd above-mentioned current loading current potential, and when correction data Ds
When being consistent with the 3rd above-mentioned current loading current potential, correction data Ds is i.e. stored in above-mentioned institute additional configuration
Memory module a memory cell in.Single overcurrent protection chip provide four groups or four groups with
On overcurrent protection value circuit arrange can also be by that analogy.
In an embodiment of the present invention, overcurrent protection chip 200 can also comprise groove position comparing unit 220
And two selection switch SW1And SW2.It is the most electric that groove position comparing unit 220 is primarily used to other
Stream protection chip 200 also connects, and to expand the group number of power supply unit correctable electric power output, below will
Explain with Fig. 4.Refer to the mistake of the power supply unit that Fig. 4, Fig. 4 are another embodiment of the present invention
Current protecting circuit 30 is coupled to schematic diagram when aligning tool 110 and load machine 120.Overcurrent protection
Circuit 30 comprises two overcurrent protection chip 200_1 and 200_2.Overcurrent protection chip 200_1 and
The circuit structure of the overcurrent protection chip 200 in 200_2 Yu Fig. 2 is the same.Wherein, overcurrent
Protection chip 200_1 is in order to according to correction data DS, the first current loading current potential VA1And second electric current bear
Carry current potential VB1Produce two groups of overcurrent protection values 240A and 240B, and overcurrent protection chip 200_2
It is then in order to according to correction data DS, the 3rd current loading current potential VC1And the 4th current loading current potential VD1
Produce two groups of overcurrent protection values 240C and 240D.Substantially, the behaviour of overcurrent protection chip 200_1
Mode of making is as the mode of operation of the overcurrent protection chip 200 in Fig. 2.As for overcurrent protection core
Its mode of operation of sheet 200_2 is also similar to, and what simply overcurrent protection chip 200_2 was inputted is the 3rd electricity
Current load current potential VC1And the 4th current loading current potential VD1, and produce correction data 130C and 130D and
Export overcurrent protection value 240C and the 240D of other two groups accordingly.Additionally, overcurrent protection chip
Load comparing unit 212A and 212B of 200_2 is the most respectively by resistance RC2And RD2It is coupled to voltage
Input Vcs.The load comparing unit 212A of overcurrent protection chip 200_2 can be according to correction data
DSAdjust the 3rd correcting current induced potential VC2, and the duty factor of overcurrent protection chip 200_2 is more single
Unit 212B can be according to correction data DSAdjust the 4th correcting current induced potential VD2.Due to over current protection
The mode of operation protecting chip 200_1 and 200_2 is similar with overcurrent protection chip 200, therefore for the most electric
The mode of operation of stream protection chip 200_1 and 200_2, in the following description will be only to groove position comparing unit
220 and two selection switch SW1And SW2Part explain, and the mode of operation of other elements will not
Repeat again.
Overcurrent protection chip 200_1 and 200_2 can receiving slit position comparison order SCOMAnd position, groove position
S1 and S2, and compare groove position comparison order SCOMAnd groove position position S1 and S2, to export enable respectively
Signal EN1And EN2, and determine enable signal EN1And EN2Current potential.In an embodiment of the present invention,
Can be by multiple pins of the groove position comparing unit 220 to overcurrent protection chip 200_1 and 200_2
State (such as: whether ground connection or be coupled to specific voltage) be configured, with position, setting slot position respectively
Put S1 and S2.Additionally, when receiving groove position comparison order SCOMTime consistent with groove position position S1, enable is believed
Number EN1Can be the first current potential, to open the selection switch SW of overcurrent protection chip 200_11And SW2。
When receiving groove position comparison order SCOMTime inconsistent with groove position position S1, enable signal EN1It it is then the second electricity
Position, to close the selection switch SW of overcurrent protection chip 200_11And SW2.Similarly, when receiving groove
Position comparison order SCOMTime consistent with groove position position S2, enable signal EN2Can be the first current potential, to open
Open the selection switch SW of overcurrent protection chip 200_21And SW2.When receiving groove position comparison order SCOM
Time inconsistent with groove position position S2, enable signal EN2It is then the second current potential, to close overcurrent protection core
The selection switch SW of sheet 200_21And SW2.Therefore, the selection switch of overcurrent protection chip 200_1
SW1Can be according to enable signal EN1Control aligning tool 110 to switching selecting circuit 210 and the first storage
Electric connection between device module 224A, and the selection of overcurrent protection chip 200_1 switch SW2Meeting
According to enable signal EN1Control aligning tool 110 to switching selecting circuit 210 and second memory module
Electric connection between 224B.Similarly, the selection switch SW of overcurrent protection chip 200_21Can depend on
According to enable signal EN2Control the switching selecting circuit of aligning tool 110 to overcurrent protection chip 200_2
Electric connection between 210 and first memory module 224A, and the choosing of overcurrent protection chip 200_1
Select switch SW2Can be according to enable signal EN2Control aligning tool 110 to overcurrent protection chip 200_2
Switching selecting circuit 210 and second memory module 224B between electric connection.Therefore, by upper
Stating the mode concatenating multiple overcurrent protection chips, the correctable electric power of the most amplifiable power supply unit exports
Group number.Though additionally, in Fig. 4 in the way of two overcurrent protection chip 200_1 and 200_2 of concatenation
Explain, but the present invention is not limited thereto.In other words, groove position comparison order S is compared by above-mentionedCOM
And the mode of the position, groove position of multiple current protection chip, the present invention can separately be applied to concatenate three or more
In the power supply unit of overcurrent protection chip.
Refer to Fig. 5, Fig. 5 is flow chart when being corrected of the overcurrent protection chip 200 to Fig. 2.
In step S410, set correction target group by aligning tool 110, after determining load machine 120
Continuous output is to the current loading current potential correcting target.In the step s 420, school is given by load machine 120
Positive goal current loading current potential.In step S430, should correct by switching selecting circuit 210 judgement
Group, to determine subsequent correction data DSShould store to memory module 224A and 224B which
One memory module.In step S440, by load comparing unit 212A or 212B correspondence school
Positive group is corrected.In step S450, by aligning tool 110, it may be judged whether also have other
Group needs correction.If also having other groups to need correction, then return to step S410；Otherwise, then complete
The correction (step S460) of overcurrent protection chip 200.
Refer to Fig. 6, Fig. 6 is that multiple overcurrent protection chip 200_1 and 200_2 to Fig. 4 are carried out
The flow chart of timing.In step S510, by the groove position comparing unit of each overcurrent protection chip
220 connect multiple overcurrent protection chips.In step S520, aligning tool 110 sends the comparison of groove position
Order SCOMGroove position comparing unit 220 to each overcurrent protection chip.In step S530, each groove
Position comparing unit 220 comparison groove position comparison order SCOMWith groove position position S1 and S2.In step S540
In, each groove position comparing unit 220 judges groove position comparison order SCOMWith groove position position S1 or S2 whether
Join.If coupling, then perform step S550, to carry out the correction program such as Fig. 5.Otherwise, if not mating,
Then return to step S520.
Refer to Fig. 7, Fig. 7 is the power supply unit to the overcurrent protection chip 200 being provided with Fig. 2
By calibration setup to the flow chart dispatched from the factory.In step S610, it is corrected rule by aligning tool 110
The setting of lattice.In step S620, proceed by such as Fig. 5 by aligning tool 110 and load machine 120
Correction program.In step S630, correction data 130A determined after correction and 130B are divided
It is not stored in a memory cell of first memory module 224A and second memory module 224B
In.In step S640, by heavy industry selector 230A and 230B respectively from first memory module
224A and second memory module 224B select the correction data of state-of-the-art record.In step S650, depend on
According to the correction data of selected state-of-the-art record, power supply unit is tested.In step S660,
Judge that test result is the most up to specification.If up to specification, then carry out the shipment program of step S670.Instead
It, if falling short of specifications, then return to step S610, to re-start correction.
In sum, by overcurrent protection chip and the circuit overcurrent protection of the present invention, can be very convenient
The overcurrent protection that power supply unit is carried out organizing by ground more sets.Furthermore, often organize the output of correctable electric power
Can arrange in pairs or groups a memory module comprising multiple memory cell, with facilitate power supply unit maker in
When producing after its power supply unit as its specification, design must be changed, can reclaim easily power supply unit and
By updating the correction data that memory module is stored, complete the setting of the overcurrent correction of new spec.
Additionally, by groove position comparing unit multiple groove positions comparing unit can concatenate, and make power supply unit can
The group number of correction electric power output is expanded easily, and is not necessary to still further design new overcurrent protection core
Sheet, therefore on using, there is high elasticity.
The foregoing is only the preferred embodiments of the present invention, all equalizations done according to claims of the present invention
Change and modification, all should belong to the covering scope of the present invention.
Claims (9)
1. an overcurrent protection chip for power supply unit, comprises:
First input end, in order to receive correction data；
Second input, in order to receive the first current loading current potential；
3rd input, in order to receive the second current loading current potential；
First memory module, comprises at least one memory cell, and each of this first memory module deposits
Storage unit is in order to record overcurrent protection value；
Second memory module, comprises at least one memory cell, and each of this second memory module deposits
Storage unit is in order to record overcurrent protection value；And
Switching selecting circuit, is coupled to this first input end, this second input and the 3rd input,
In order to compare this correction data and this first current loading current potential, and compare this correction data and this second electricity
Current load current potential；
Wherein when this correction data is consistent with this first current loading current potential, this correction data is stored in
In one memory cell of this first memory module；
Wherein when this correction data is consistent with this second current loading current potential, this correction data is stored in
In one memory cell of this second memory module.
2. overcurrent protection chip as claimed in claim 1, also comprises:
Four-input terminal, in order to receive the 3rd current loading current potential；And
3rd memory module, comprises at least one memory cell, and the 3rd each of memory module deposits
Storage unit is in order to record an overcurrent protection value；
Wherein this switching selecting circuit is further coupled to this four-input terminal, and another in order to compare this correction data
And the 3rd current loading current potential, and when this correction data is consistent with the 3rd current loading current potential, should
Correction data is stored in a memory cell of the 3rd memory module.
3. overcurrent protection chip as claimed in claim 1, wherein this switching selecting circuit comprises:
First load comparing unit, in order to adjust the of this first load comparing unit according to this correction data
One correcting current induced potential；
Second load comparing unit, in order to adjust the of this second load comparing unit according to this correction data
Two correcting current induced potentials；
Correction group selector, is coupled to this first load outfan of comparing unit and this second duty factor relatively
The outfan of unit；
First switch, is coupled to this first input end, this correction group selector and this first memory module,
In order to control the electric connection between this first input end and this first memory module；And
Second switch, is coupled to this first input end, this correction group selector and this second memory module,
In order to control the electric connection between this second input and this second memory module；
Wherein select equal to this first current loading current potential, this correction group when this first correcting current induced potential
Select device and open this first switch, so that this correction data be stored in this first memory module one deposits
In storage unit；
Wherein select equal to this second current loading current potential, this correction group when this second correcting current induced potential
Select device and open this second switch, so that this correction data be stored in this second memory module one deposits
In storage unit.
4. overcurrent protection chip as claimed in claim 1, wherein this first memory module and this
Two memory modules respectively comprise multiple memory cell, and this overcurrent protection chip also comprises:
First heavy industry selector, in order to select this from multiple memory cells of this first memory module
The nearest correction data that first memory module is stored；And
Second heavy industry selector, in order to select this from multiple memory cells of this second memory module
The nearest correction data that second memory module is stored.
5. overcurrent protection chip as claimed in claim 1, also comprises:
Groove position comparing unit, in order to the comparison order of comparison one groove position and a position, groove position, to export an enable
Signal；
First selects switch, selects electricity in order to control this first input end according to this enable signal to this switching
Electric connection between road and this first memory module；And
Second selects switch, selects electricity in order to control this first input end according to this enable signal to this switching
Electric connection between road and this second memory module.
6. a circuit overcurrent protection for power supply unit, comprises multiple overcurrent protection chip, wherein
Each overcurrent protection chip comprises:
First input end, in order to receive a correction data；
Second input, in order to receive the first current loading current potential；
3rd input, in order to receive one second current loading current potential；
First memory module, comprises at least one memory cell, and each of this first memory module deposits
Storage unit is in order to record an overcurrent protection value；
Second memory module, comprises at least one memory cell, and each of this second memory module deposits
Storage unit is in order to record overcurrent protection value；
Switching selecting circuit, is coupled to this first input end, this second input and the 3rd input,
In order to compare this correction data and this first current loading current potential, and compare this correction data and this second electricity
Current load current potential, wherein when this correction data is consistent with this first current loading current potential, this correction data
Be stored in a memory cell of this first memory module, and when this correction data with this second
When current loading current potential is consistent, this correction data is stored in a memorizer of this second memory module
In unit；
Groove position comparing unit, in order to the comparison order of comparison groove position and position, groove position, to export enable signal also
Determine the current potential of this enable signal；
First selects switch, selects electricity in order to control this first input end according to this enable signal to this switching
Electric connection between road and this first memory module；And
Second selects switch, selects electricity in order to control this first input end according to this enable signal to this switching
Electric connection between road and this second memory module；
Wherein this groove position comparing unit of these overcurrent protection chips is coupled to each other, and receives this respectively
The comparison order of groove position and this position, groove position.
7. circuit overcurrent protection as claimed in claim 6, each of which overcurrent protection chip is also
Comprise:
Four-input terminal, in order to receive the 3rd current loading current potential；And
3rd memory module, comprises at least one memory cell, and the 3rd each of memory module deposits
Storage unit is in order to record overcurrent protection value；
Wherein this switching selecting circuit is further coupled to this four-input terminal, and another in order to compare this correction data
And the 3rd current loading current potential, and when this correction data is consistent with the 3rd current loading current potential, should
Correction data is stored in a memory cell of the 3rd memory module.
8. circuit overcurrent protection as claimed in claim 6, each of which overcurrent protection chip
This switching selecting circuit comprises:
First load comparing unit, in order to adjust the of this first load comparing unit according to this correction data
One correcting current induced potential；
Second load comparing unit, in order to adjust the of this second load comparing unit according to this correction data
Two correcting current induced potentials；
Correction group selector, is coupled to this first load outfan of comparing unit and this second duty factor relatively
The outfan of unit；
First switch, is coupled to this first input end, this correction group selector and this first memory module,
In order to control the electric connection between this first input end and this first memory module；And
Second switch, is coupled to this first input end, this correction group selector and this second memory module,
In order to control the electric connection between this second input and this second memory module；
Wherein select equal to this first current loading current potential, this correction group when this first correcting current induced potential
Select device and open this first switch, so that this correction data be stored in this first memory module one deposits
In storage unit；
Wherein select equal to this second current loading current potential, this correction group when this second correcting current induced potential
Select device and open this second switch, so that this correction data be stored in this second memory module one deposits
In storage unit.
9. circuit overcurrent protection as claimed in claim 6, each of which overcurrent protection chip
This first memory module and this second memory module respectively comprise multiple memory cell, and each mistake
Current protection chip also comprises:
First heavy industry selector, in order to select this from multiple memory cells of this first memory module
The nearest correction data that first memory module is stored；And
Second heavy industry selector, in order to select this from multiple memory cells of this second memory module
The nearest correction data that second memory module is stored.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW104111143A TWI548981B (en) | 2015-04-07 | 2015-04-07 | Over current protection (ocp) chip and ocp circuit of power supply |
| TW104111143 | 2015-04-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106207976A true CN106207976A (en) | 2016-12-07 |
| CN106207976B CN106207976B (en) | 2018-09-04 |
Family
ID=57445019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510220733.0A Active CN106207976B (en) | 2015-04-07 | 2015-05-04 | Overcurrent protection chip and overcurrent protection circuit of power supply |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106207976B (en) |
| TW (1) | TWI548981B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111856310A (en) * | 2019-04-03 | 2020-10-30 | 深圳富桂精密工业有限公司 | Power distribution unit monitoring system |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11170675B2 (en) * | 2020-03-19 | 2021-11-09 | Himax Technologies Limited | Method for performing hybrid over-current protection detection in a display module, and associated timing controller |
| TWI801220B (en) * | 2022-04-26 | 2023-05-01 | 宏碁股份有限公司 | Power supply device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006178539A (en) * | 2004-12-20 | 2006-07-06 | Freescale Semiconductor Inc | Overcurrent protection circuit and dc power supply device |
| WO2010126491A1 (en) * | 2009-04-28 | 2010-11-04 | Semiconductor Components Industries, Llc | Method for providing over current protection and circuit |
| TW201239600A (en) * | 2011-03-25 | 2012-10-01 | Delta Electronics Inc | Power supply |
| TWI455469B (en) * | 2011-08-04 | 2014-10-01 | Richtek Technology Corp | Power supply with over current protection and control circuit thereof and method of over current protection |
| TWI566492B (en) * | 2012-10-26 | 2017-01-11 | 偉詮電子股份有限公司 | Over current protection chip of power supply and configuration method thereof |
-
2015
- 2015-04-07 TW TW104111143A patent/TWI548981B/en active
- 2015-05-04 CN CN201510220733.0A patent/CN106207976B/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111856310A (en) * | 2019-04-03 | 2020-10-30 | 深圳富桂精密工业有限公司 | Power distribution unit monitoring system |
| CN111856310B (en) * | 2019-04-03 | 2023-08-29 | 深圳富联富桂精密工业有限公司 | Power Distribution Unit Monitoring System |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201636767A (en) | 2016-10-16 |
| CN106207976B (en) | 2018-09-04 |
| TWI548981B (en) | 2016-09-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2899556B1 (en) | Semiconductor device and battery voltage monitoring device | |
| CN104821886B (en) | For the method and system via four lines in Ethernet cable to supply electric power | |
| KR101149270B1 (en) | Systems and methods for testing integrated circuit devices | |
| US20140019111A1 (en) | Method and apparatus for performing battery cell control with aid of virtual battery mechanism | |
| CN104133185B (en) | More piece managing electric quantity IC multichannel calibration calibration equipment and method | |
| CN106207976A (en) | Overcurrent protection chip and overcurrent protection circuit of power supply | |
| CN103326577A (en) | Regulating equipment for output voltage of switching power supply, regulating method and integrated chip | |
| CN102760493A (en) | Nonvolatile memory apparatus and verification method thereof | |
| CN102164010A (en) | Automatic calibration circuit | |
| CN108089106A (en) | A kind of dichotomy test method of voltage dip tolerance | |
| CN103837782A (en) | Detection device of data line | |
| CN103248370A (en) | Key setting method | |
| CN103792984B (en) | Overcurrent protection chip of power supply and setting method thereof | |
| US11221605B2 (en) | Intelligent fan control system with interface compatibility | |
| CN110120241A (en) | Semiconductor devices | |
| US20160077143A1 (en) | Power up detecting system | |
| CN105321541A (en) | Data receiving chip | |
| CN105445604A (en) | USB 3.1 C type cable automatic test method | |
| CN105304110A (en) | Control method for data receiving chip | |
| US7742890B2 (en) | Cold junction compensation method for temperature controlling console | |
| US9092018B2 (en) | Positioner | |
| CN103376345A (en) | Minimum load current testing device | |
| CN206726080U (en) | Mu balanced circuit and power supply circuit, remote control with the mu balanced circuit | |
| CN105469817A (en) | Data receiving chip | |
| CN102163461A (en) | Method for improving yield and reading reliability of electrically erasable programmable read-only memory (EEPROM) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |