CN110176757A - Self compensation reverse protection device, chip and method - Google Patents
Self compensation reverse protection device, chip and method Download PDFInfo
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- CN110176757A CN110176757A CN201910587210.8A CN201910587210A CN110176757A CN 110176757 A CN110176757 A CN 110176757A CN 201910587210 A CN201910587210 A CN 201910587210A CN 110176757 A CN110176757 A CN 110176757A
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- 238000010586 diagram Methods 0.000 description 6
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- 238000004590 computer program Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
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- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 2
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- 235000013399 edible fruits Nutrition 0.000 description 2
- 235000008434 ginseng Nutrition 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
- H02H11/002—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of inverted polarity or connection; with switching for obtaining correct connection
Abstract
The present invention provides self compensation reverse protection device, chip and method, which is set in chip, and above-mentioned apparatus includes: comparing unit and controlled switch；Comparing unit is connected with controlled switch, and constitutes feedback control loop；Wherein, comparing unit is used to obtain the predetermined reference voltage of chip and the inside ground voltage of chip, and predetermined reference voltage is compared with internal ground voltage, exports comparison result；Controlled switch is used to adjust internal ground voltage according to comparison result, so that the internally power pins current potential of voltage follow chip, protects the chip functions module of chip interior.When the connection of the external power supply forward direction of chip, guarantee that the power pins current potential of internal ground voltage and chip has constant pressure difference；When the external power supply Opposite direction connection of chip, guarantee the pin output signal level of chip near the power pins current potential of chip, so that effective protection chip is not damaged, and protection chip periphery device.
Description
Technical field
The present invention relates to chip protection technique fields, more particularly, to self compensation reverse protection device, chip and method.
Background technique
At present for protection chip itself and chip periphery device requirement, high reliability application scenarios (such as automobile with
Industrial application) demand of tolerance power supply and ground pin reversal connection can be proposed to chip, and do not allow chip in reversal connection other draw
Foot exports high pressure to protect the device for being with electric connecting relation outside.Common reverse connection prevention protection circuit can all have side effect: i.e.
The ground potential of chip internal circuits is influenced, and this influences to be distributed with temperature, environment and chip manufacture process corner and generates drift.
This side effect has a significant impact to the high-precision applications of chip, so portion generates the reliable of energy automotive resistance drift in the chip
Ground potential is meaningful.
Summary of the invention
In view of this, the purpose of the present invention is to provide self compensation reverse protection device, chip and method, when outside chip
When portion's power supply forward direction connects, guarantee that the power pins current potential of internal ground voltage and chip has constant pressure difference；When the outside of chip
When reversal of power connects, guarantee the pin output signal electricity of the internally power pins current potential of voltage follow chip and chip
It puts down near the power pins current potential of chip, is not damaged so as to effective protection chip, and protection chip periphery device.
In a first aspect, the embodiment of the invention provides a kind of self compensation reverse protection device, the self compensation reverse connecting protection
Device is set in chip, and described device includes: comparing unit and controlled switch；
The comparing unit is connected with the controlled switch；
The comparing unit, for obtaining the predetermined reference voltage of the chip and the inside ground voltage of the chip, and
The predetermined reference voltage is compared with the internal ground voltage, exports comparison result；
The controlled switch, for adjusting the internal ground voltage according to the comparison result, so that described internally electric
Pressure follows the power pins current potential of the chip, protects to the chip functions module of the chip interior.
With reference to first aspect, the embodiment of the invention provides the first possible embodiments of first aspect, wherein institute
Stating comparing unit includes input terminal and output end, and the input terminal is for obtaining the predetermined reference voltage and the internally electricity
Pressure, the output end are connect with the controlled switch；
The controlled switch includes controlled end and control terminal, and the controlled end is connect with the output end of the comparing unit,
The control terminal is connect with the input terminal of the comparing unit and the chip.
The possible embodiment of with reference to first aspect the first, the embodiment of the invention provides second of first aspect
Possible embodiment, wherein the comparing unit includes comparator chip, and the input terminal includes first terminal and second end
Son is respectively used to obtain the predetermined reference voltage and the internal ground voltage.
The possible embodiment of second with reference to first aspect, the embodiment of the invention provides the third of first aspect
Possible embodiment, wherein the comparator chip is continuous time amplifier chip, and the first terminal is anti-phase input
End, the Second terminal are non-inverting input terminal, and the inverting input terminal is described with mutually defeated for obtaining the predetermined reference voltage
Enter end for obtaining the internal ground voltage.
The third possible embodiment with reference to first aspect, the embodiment of the invention provides the 4th kind of first aspect
Possible embodiment, wherein the controlled switch is active controlled device.
The 4th kind of possible embodiment with reference to first aspect, the embodiment of the invention provides the 5th kind of first aspect
Possible embodiment, wherein the active controlled device is one of following device: field-effect tube, bipolar transistor.
The 5th kind of possible embodiment with reference to first aspect, the embodiment of the invention provides the 6th kind of first aspect
Possible embodiment, wherein when the active controlled device is N-type field-effect tube, the controlled end of the controlled switch is
One end where the grid of the N-type field-effect tube；The control terminal of the controlled switch be the N-type field-effect tube source electrode and
One end where draining；And the source electrode of the N-type field-effect tube is connect with the Second terminal of the comparator chip, institute
The drain electrode for stating N-type field-effect tube is connect with the grounding pin of the chip.
Second aspect, the embodiment of the present invention also provide a kind of chip, including self compensation reverse connecting protection described in first aspect
Device further includes chip functions module；
One end of the chip functions module is connected with the power pins of the chip, the chip functions module it is another
One end is connect with the comparing unit of the self compensation reverse protection device, and the controlled switch of the self compensation reverse protection device is also
It is connect with the grounding pin of the chip.
In conjunction with second aspect, the embodiment of the invention provides the first possible embodiments of second aspect, wherein institute
Stating chip further includes functional pin, and the functional pin is connect with the chip functions module.
The third aspect, the embodiment of the present invention also provide a kind of self compensation reverse connecting protection method, and the method is applied to first
Self compensation reverse protection device described in aspect, which comprises
The comparing unit obtains the predetermined reference voltage of the chip and the inside ground voltage of the chip, and will be described
Predetermined reference voltage is compared with the internal ground voltage, exports comparison result；
The controlled switch adjusts the internal ground voltage according to the comparison result, so that the internally voltage follow
The power pins current potential of the chip protects the chip functions module of the chip interior.
The embodiment of the invention provides self compensation reverse protection device, chip and method, the self compensation reverse protection devices
It is set in chip, above-mentioned apparatus includes: comparing unit and controlled switch；Comparing unit is connected with controlled switch, and is constituted anti-
Present loop；Wherein, comparing unit is used to obtain the predetermined reference voltage of chip and the inside ground voltage of chip, and by preset reference
Voltage is compared with internal ground voltage, exports comparison result；Controlled switch is used to adjust internal ground voltage according to comparison result,
So that the internally power pins current potential of voltage follow chip, protects the chip functions module of chip interior.Work as chip
The connection of external power supply forward direction when, guarantee that the power pins current potential of internal ground voltage and chip has constant pressure difference；When chip
When external power supply Opposite direction connection, guarantee the internally pin of the power pins current potential of voltage follow chip and chip output letter
Number level is near the power pins current potential of chip, so that effective protection chip is not damaged, and protection chip periphery device.
Other features and advantages of the present invention will illustrate in the following description, also, partly become from specification
It obtains it is clear that understand through the implementation of the invention.The objectives and other advantages of the invention are in specification and attached drawing
Specifically noted structure is achieved and obtained.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended attached drawing, is described in detail below.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is self compensation reverse protection device schematic diagram provided in an embodiment of the present invention；
Fig. 2 is another self compensation reverse protection device schematic diagram provided in an embodiment of the present invention；
Fig. 3 is that chip provided in an embodiment of the present invention works normally schematic diagram；
Fig. 4 is chip reverse connecting protection schematic diagram provided in an embodiment of the present invention；
Fig. 5 is self compensation reverse connecting protection method flow diagram provided in an embodiment of the present invention.
Icon:
10- comparing unit；20- controlled switch.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with attached drawing to the present invention
Technical solution be clearly and completely described, it is clear that described embodiments are some of the embodiments of the present invention, rather than
Whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, shall fall within the protection scope of the present invention.
To be described in detail to the embodiment of the present invention below convenient for understanding the present embodiment.
There is the side effect for the ground potential for influencing chip internal circuits, this hair in view of currently used reverse connection prevention protection circuit
Bright embodiment proposes a kind of self compensation reverse protection device, chip and method, the available power pins electricity for following chip
The inside ground voltage of position, thus protection chip and chip periphery device in chip reversal connection.
Embodiment one:
The embodiment of the present invention proposes a kind of self compensation reverse protection device, which is set to core
In piece, protection chip and chip periphery device in chip reversal connection.Fig. 1 is that self compensation provided in an embodiment of the present invention reversal connection is protected
Protection unit schematic diagram, referring to Fig.1, the self compensation reverse protection device include: comparing unit 10 and controlled switch 20；Comparing unit
10 and controlled switch 20 connect, and constitute feedback control loop；Wherein, comparing unit 10 be used for obtain chip predetermined reference voltage and
The inside ground voltage of chip, and above-mentioned predetermined reference voltage is compared with internal ground voltage, export comparison result；It is controlled to open
20 are closed for adjusting internal ground voltage according to above-mentioned comparison result, so that the internally power pins current potential of voltage follow chip,
The chip functions module of chip interior is protected.
Further, comparing unit 10 includes input terminal and output end, wherein input terminal is for obtaining predetermined reference voltage
With internal ground voltage, output end is then connect with controlled switch 20.Controlled switch 20 then include controlled end and control terminal, controlled end with
The output end of comparing unit 10 connects, and control terminal is connect with the input terminal of comparing unit 10 and chip, to constitute feedback control loop.
Specifically, the input terminal of comparing unit 10 is for obtaining predetermined reference voltage and internal ground voltage, wherein default ginseng
Examining voltage is that user is configured according to the external ground voltage of chip, and predetermined reference voltage meets and the power pins of chip electricity
The pressure difference of position is steady state value；Above-mentioned predetermined reference voltage is compared by comparing unit 10 with internal ground voltage, obtains comparing knot
Fruit, and the comparison result is sent to by output end the controlled end of controlled switch 20.The controlled end of controlled switch 20 receives
After the comparison result that above-mentioned comparing unit 10 is sent, since comparing unit 10 and controlled switch 20 constitute feedback control loop, thus real
The control terminal of existing controlled switch 20 adjusts internal ground voltage according to the comparison result.
Different from most of reverse-connection protection circuit, the comparing unit 10 in the embodiment of the present invention includes comparator chip, and
The comparator chip is continuous time amplifier chip, and inoperative is in the comparator of relatively state, and above-mentioned comparator chip is defeated
Entering end includes first terminal and Second terminal, is respectively used to obtain predetermined reference voltage and internal ground voltage, and by preset reference
The differential voltage of voltage and internal ground voltage amplifies, output control voltage.Controlled switch 20 is then active controlled device, on
The control voltage for stating the output of comparing unit 10 controls the equivalent resistance of the active controlled device, to guarantee the internally electric of chip
Pressure be equal to predetermined reference voltage, in order to realize active controlled device in normal operating conditions equivalent resistance by comparing unit 10
Output voltage control, the active controlled device are one of following device: field-effect tube, MOS (Metal Oxide
Semiconductor, metal-oxide-semiconductor field effect transistor) pipe, bipolar transistor.
Specifically, comparator chip is continuous time amplifier chip, and first terminal is inverting input terminal, and Second terminal is
Non-inverting input terminal, wherein inverting input terminal is used to obtain internal ground voltage for obtaining predetermined reference voltage, non-inverting input terminal,
And predetermined reference voltage is compared with internal ground voltage, i.e., by the differential voltage of predetermined reference voltage and internal ground voltage into
Row amplification, obtains comparison result, comparison result is sent to the controlled end of controlled switch 20 by output end.Wherein, above-mentioned relatively to tie
Fruit is control voltage, and the controlled end of controlled switch 20 is connect with the output end of comparing unit 10, and therefore, which can control
It is formed with the equivalent resistance of source controlled device, to guarantee that the inside ground voltage of chip is equal to predetermined reference voltage.
In order to make it easy to understand, being illustrated here by N-type field-effect tube of active controlled device.When active controlled device is
When N-type field-effect tube, the controlled end of controlled switch is one end where the grid of N-type field-effect tube；The control of controlled switch 20
End is one end where the source electrode and drain electrode of N-type field-effect tube；And the of the source electrode of the N-type field-effect tube and comparator chip
Two-terminal connection, the drain electrode of N-type field-effect tube and the grounding pin of chip connect.When chip works normally, as shown in Fig. 2,
Comparing unit 10 amplifies the differential voltage of predetermined reference voltage and internal ground voltage, obtains comparison result, and according to than
Relatively result generates continuous time control signal, i.e. control voltage, the equivalent electricity which passes through the active controlled device of control
Resistance, to guarantee that the inside ground voltage of chip is equal to predetermined reference voltage.Due to the power pins of predetermined reference voltage and chip
Current potential has constant pressure difference, and therefore, when the connection of the external power supply forward direction of chip, controlled switch 20 is according to above-mentioned comparison result tune
Internal ground voltage is saved, internally voltage follow predetermined reference voltage is made, due to the power pins of predetermined reference voltage and chip electricity
Position has constant pressure difference, and therefore, controlled switch 20 finally makes the power pins current potential of internally voltage follow chip, i.e., internally
The power pins current potential of voltage and chip has constant pressure difference；When the external power supply Opposite direction connection of chip, i.e. the power supply of chip
When the grounding pin of pin and chip is reversely connected, there is no electric current, i.e. N-type field-effect in controlled switch 20 between source electrode and drain electrode at this time
Pipe is in an off state, not continuous duty, and leading to the voltage difference of self compensation reverse protection device is 0, to guarantee core
The power pins current potential of the internally voltage follow chip of piece guarantees that the pin output signal level of chip draws in the power supply of chip
It near foot current potential, and then can not be damaged with effective protection chip, and protection chip periphery device.
Further, the embodiment of the invention also provides a kind of chip, which includes above-mentioned self compensation reverse connecting protection
Device further includes chip functions module；Wherein, one end of chip functions module is connected with the power pins of chip, chip function
The other end of energy module is connect with the comparing unit 10 of self compensation reverse protection device, and the controlled of self compensation reverse protection device is opened
20 are closed also to connect with the grounding pin of chip.In addition, the chip further includes functional pin, the functional pin and chip functions module
Connection.
Specifically, in normal work, self compensation reverse protection device can guarantee the internally electric of the chip to the chip
Pressure and the power pins current potential of chip have constant pressure difference, when the reversal connection of the grounding pin of the power pins of chip and chip, on
State self compensation reverse protection device can guarantee the pin output signal level of the chip near the power pins current potential of chip,
Output HIGH voltage is prevented, to protect chip not to be damaged, and the peripheral components of protection chip.In order to make it easy to understand, here
For example, working as chip in normal work, as shown in figure 3, at this point, the inside ground voltage of chip is 0.01V, the power supply of chip
Pin current potential is 25V, and therefore, the inside ground voltage of chip and the power pins current potential of chip have constant pressure difference, when chip
When power pins current potential difference, the inside ground voltage of chip is also changed correspondingly, and self compensation reverse protection device guarantees the chip
The power pins current potential of internal ground voltage and chip has constant pressure difference.When the power pins of chip and the grounding pin of chip are anti-
When connecing, as shown in figure 4, at this time chip inside ground voltage guarantee be less than 0.1V, guarantee chip functions module voltage meet 0~
0.1V, so that when guaranteeing chip reversal connection the pin output signal level of chip prevents near the power pins current potential of chip
Output HIGH voltage, to protect chip not to be damaged, and the peripheral components of protection chip.
Embodiment two:
On the basis of the above embodiments, the embodiment of the invention also provides a kind of self compensation reverse connecting protection method, such as Fig. 5
Shown in a kind of flow chart of self compensation reverse connecting protection method.
Referring to Fig. 5, method includes the following steps:
Step S101, comparing unit obtain the predetermined reference voltage of chip and the inside ground voltage of chip, and by default ginseng
It examines voltage to be compared with internal ground voltage, exports comparison result；
Step S102, controlled switch adjust internal ground voltage according to comparison result, so that internally voltage follow chip
Power pins current potential protects the chip functions module of chip interior.
The embodiment of the invention provides self compensation reverse protection device, chip and method, the self compensation reverse protection devices
It is set in chip, above-mentioned apparatus includes: comparing unit and controlled switch；Comparing unit is connected with controlled switch, and is constituted anti-
Present loop；Wherein, comparing unit is used to obtain the predetermined reference voltage of chip and the inside ground voltage of chip, and by preset reference
Voltage is compared with internal ground voltage, exports comparison result；Controlled switch is used to adjust internal ground voltage according to comparison result,
So that the internally power pins current potential of voltage follow chip, protects the chip functions module of chip interior.Work as chip
The connection of external power supply forward direction when, guarantee that the power pins current potential of internal ground voltage and chip has constant pressure difference；When chip
When external power supply Opposite direction connection, guarantee the internally pin of the power pins current potential of voltage follow chip and chip output letter
Number level is not damaged near the power pins current potential of chip so as to effective protection chip, and protection chip periphery
Device.
The embodiment of the present invention also provides a kind of electronic equipment, including memory, processor and storage are on a memory and can
The computer program run on a processor, processor realize that self compensation provided by the above embodiment is anti-when executing computer program
The step of connecing guard method.
The embodiment of the present invention also provides a kind of computer readable storage medium, and meter is stored on computer readable storage medium
Calculation machine program, the step of self compensation reverse connecting protection method of above-described embodiment is executed when computer program is run by processor.
Computer program product provided by the embodiment of the present invention, the computer-readable storage including storing program code
Medium, the instruction that said program code includes can be used for executing previous methods method as described in the examples, and specific implementation can be joined
See embodiment of the method, details are not described herein.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description
Specific work process, can refer to corresponding processes in the foregoing method embodiment, details are not described herein.
In addition, in the description of the embodiment of the present invention unless specifically defined or limited otherwise, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
It, can be with if the function is realized in the form of SFU software functional unit and when sold or used as an independent product
It is stored in the executable non-volatile computer-readable storage medium of a processor.Based on this understanding, of the invention
Technical solution substantially the part of the part that contributes to existing technology or the technical solution can be with software in other words
The form of product embodies, which is stored in a storage medium, including some instructions use so that
One computer equipment (can be personal computer, server or the network equipment etc.) executes each embodiment institute of the present invention
State all or part of the steps of method.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-
Only Memory), random access memory (RAM, Random Access Memory), magnetic or disk etc. are various can be with
Store the medium of program code.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
Finally, it should be noted that embodiment described above, only a specific embodiment of the invention, to illustrate the present invention
Technical solution, rather than its limitations, scope of protection of the present invention is not limited thereto, although with reference to the foregoing embodiments to this hair
It is bright to be described in detail, those skilled in the art should understand that: anyone skilled in the art
In the technical scope disclosed by the present invention, it can still modify to technical solution documented by previous embodiment or can be light
It is readily conceivable that variation or equivalent replacement of some of the technical features；And these modifications, variation or replacement, do not make
The essence of corresponding technical solution is detached from the spirit and scope of technical solution of the embodiment of the present invention, should all cover in protection of the invention
Within the scope of.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. a kind of self compensation reverse protection device, which is characterized in that the self compensation reverse protection device is set in chip, institute
Stating device includes: comparing unit and controlled switch；
The comparing unit is connected with the controlled switch；
The comparing unit, for obtaining the predetermined reference voltage of the chip and the inside ground voltage of the chip, and by institute
It states predetermined reference voltage to be compared with the internal ground voltage, exports comparison result；
The controlled switch, for adjusting the internal ground voltage according to the comparison result so that the internal ground voltage with
With the power pins current potential of the chip, the chip functions module of the chip interior is protected.
2. the apparatus according to claim 1, which is characterized in that the comparing unit includes input terminal and output end, described
Input terminal is connect for obtaining the predetermined reference voltage and the internal ground voltage, the output end with the controlled switch；
The controlled switch includes controlled end and control terminal, and the controlled end is connect with the output end of the comparing unit, described
Control terminal is connect with the input terminal of the comparing unit and the chip.
3. the apparatus of claim 2, which is characterized in that the comparing unit includes comparator chip, the input
End includes first terminal and Second terminal, is respectively used to obtain the predetermined reference voltage and the internal ground voltage.
4. device according to claim 3, which is characterized in that the comparator chip is continuous time amplifier chip,
The first terminal is inverting input terminal, and the Second terminal is non-inverting input terminal, and the inverting input terminal is described for obtaining
Predetermined reference voltage, the non-inverting input terminal is for obtaining the internal ground voltage.
5. device according to claim 4, which is characterized in that the controlled switch is active controlled device.
6. device according to claim 5, which is characterized in that the active controlled device is one of following device:
Field-effect tube, bipolar transistor.
7. device according to claim 6, which is characterized in that when the active controlled device is N-type field-effect tube, institute
The controlled end of controlled switch is stated as one end where the grid of the N-type field-effect tube；The control terminal of the controlled switch is institute
State one end where the source electrode and drain electrode of N-type field-effect tube；And the source electrode of the N-type field-effect tube and the comparator chip
Second terminal connection, the drain electrode of the N-type field-effect tube connect with the grounding pin of the chip.
8. a kind of chip, which is characterized in that including the described in any item self compensation reverse protection devices of claim 1-7, also wrap
Include chip functions module；
One end of the chip functions module is connected with the power pins of the chip, the other end of the chip functions module
Connect with the comparing unit of the self compensation reverse protection device, the controlled switch of the self compensation reverse protection device also with institute
State the grounding pin connection of chip.
9. chip according to claim 8, which is characterized in that the chip further includes functional pin, the functional pin
It is connect with the chip functions module.
10. a kind of self compensation reverse connecting protection method, which is characterized in that the method is applied to described in any one of claim 1-7
Self compensation reverse protection device, which comprises
The comparing unit obtains the predetermined reference voltage of the chip and the inside ground voltage of the chip, and will be described default
Reference voltage is compared with the internal ground voltage, exports comparison result；
The controlled switch adjusts the internal ground voltage according to the comparison result, so that described in the internally voltage follow
The power pins current potential of chip protects the chip functions module of the chip interior.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910587210.8A CN110176757A (en) | 2019-07-01 | 2019-07-01 | Self compensation reverse protection device, chip and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910587210.8A CN110176757A (en) | 2019-07-01 | 2019-07-01 | Self compensation reverse protection device, chip and method |
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2019
- 2019-07-01 CN CN201910587210.8A patent/CN110176757A/en active Pending
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| WO2011155006A1 (en) * | 2010-06-09 | 2011-12-15 | パナソニック株式会社 | Power supply reverse-connection protection circuit |
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| US20170155214A1 (en) * | 2015-11-26 | 2017-06-01 | International Green Chip (Tianjin) Co., Ltd. | Method of and device for protecting usb type-c interface chip when cc pins thereof being at high voltage |
| CN106099842A (en) * | 2016-08-17 | 2016-11-09 | 青海绿草地新能源科技有限公司 | A kind of reversal connection or short-circuit protection circuit |
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| CN210053211U (en) * | 2019-07-01 | 2020-02-11 | 南京英锐创电子科技有限公司 | Self-compensation reverse connection protection device and chip |
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