CN109873398A - Chip under-voltage protecting circuit and chip circuit - Google Patents
Chip under-voltage protecting circuit and chip circuit Download PDFInfo
- Publication number
- CN109873398A CN109873398A CN201910129916.XA CN201910129916A CN109873398A CN 109873398 A CN109873398 A CN 109873398A CN 201910129916 A CN201910129916 A CN 201910129916A CN 109873398 A CN109873398 A CN 109873398A
- Authority
- CN
- China
- Prior art keywords
- voltage
- chip
- module
- protecting circuit
- triode
- 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.)
- Pending
Links
Abstract
The present invention relates to a kind of chip under-voltage protecting circuit and chip circuits, by the supply voltage of voltage acquisition module acquisition chip, to obtain detection voltage.Wherein, when the corresponding supply voltage of detection voltage is under-voltage, switch control module is used for the detection voltage according to voltage acquisition module, and one end and the other end of controlled switch is connected, is grounded the protection pin comp of chip.Further, chip stops working after the grounding in its protection pin comp.Chip is closed in time when the supply voltage of chip is under-voltage based on this, prevents chip because of under-voltage damage.
Description
Technical field
The present invention relates to electronic circuit technology fields, more particularly to chip under-voltage protecting circuit and chip circuit.
Background technique
Chip, also known as integrated circuit refer generally to the silicon wafer for including integrated circuit.Chip at work, generally requires offer
The supply voltage of particular size.
At work, there is voltage in supply voltage and falls in chip, i.e., can be to chip and chip when supply voltage is under-voltage
The load of institute's band affects greatly, and the damage of chip and load is resulted even in when serious.
Summary of the invention
Based on this, it is necessary to for the under-voltage easy work for influencing chip of supply voltage of chip, or even burn chip
Problem provides a kind of chip under-voltage protecting circuit and chip circuit.
A kind of chip under-voltage protecting circuit, including controlled switch, switch control module and voltage acquisition module；
The voltage acquisition module is used for the supply voltage of access chip, to obtain detection voltage；
One end of the controlled switch is used to connect the protection pin of the chip, and the other end is for being grounded；
The switch control module is used for according to the detection voltage, and the one end and the other end for controlling the controlled switch are led
Logical or shutdown.
Voltage acquisition module includes the first division module and the second division module in one of the embodiments,；
The first end of first division module is used to correspond to the supply voltage of acquisition chip, and the second end of the first division module connects
The first end of the second division module is connect, the second end of the second division module is for accessing reference voltage；
The second end connection switch control module of first division module.
The first division module includes the first divider resistance in one of the embodiments, and the second division module includes second
Divider resistance.
Switch control module includes controllable accurate source of stable pressure in one of the embodiments,；
The cathode of the controllable accurate source of stable pressure is for accessing the supply voltage；
The anode of the controllable accurate source of stable pressure is for being grounded；
The controllable end of the controllable accurate source of stable pressure connects the voltage acquisition module, for accessing the detection voltage.
Switch control module further includes current limliting module in one of the embodiments,；
The cathode of the controllable accurate source of stable pressure is used to access the supply voltage by the current limliting module.
Controlled switch includes triode in one of the embodiments,；
The collector of the triode is used to connect the protection pin of the chip；
The emitter of the triode is for being grounded；
The base stage of the triode is for accessing the supply voltage.
It in one of the embodiments, further include third division module and the 4th division module；
The base stage of the triode is used to access the supply voltage by the third division module, and for passing through institute
State the 4th division module ground connection.
It in one of the embodiments, further include isolation module；
The base stage of the triode by the isolation module for being grounded.
The triode includes NPN triode in one of the embodiments,.
A kind of chip circuit, including chip and above-mentioned chip under-voltage protecting circuit；
The chip under-voltage protecting circuit includes controlled switch, switch control module and voltage acquisition module；
The voltage acquisition module is used to access the supply voltage of the chip, to obtain detection voltage；
One end of the controlled switch connects the protection pin of the chip, and the other end is for being grounded；
The switch control module is used for according to the detection voltage, and the one end and the other end for controlling the controlled switch are led
Logical or shutdown.
Above-mentioned chip under-voltage protecting circuit and chip circuit, by the supply voltage of voltage acquisition module acquisition chip,
Voltage is detected to obtain.Wherein, when the corresponding supply voltage of detection voltage is under-voltage, switch control module according to voltage for adopting
The detection voltage for collecting module, is connected one end and the other end of controlled switch, is grounded the protection pin of chip.Further, core
Piece stops working after the grounding in its protection pin.Chip is closed in time when the supply voltage of chip is under-voltage based on this, is prevented
Only chip is because of under-voltage damage.
Detailed description of the invention
Fig. 1 is chip under-voltage protecting circuit function structure chart；
Fig. 2 is the chip under-voltage protecting circuit function structure chart of an embodiment；
Fig. 3 is the chip under-voltage protecting circuit figure of an embodiment；
Fig. 4 is the chip under-voltage protecting circuit function structure chart of another embodiment；
Fig. 5 is the chip under-voltage protecting circuit figure of a further embodiment；
Fig. 6 is chip circuit function structure chart.
Specific embodiment
Purpose, technical solution and technical effect for a better understanding of the present invention, below in conjunction with drawings and examples
Further explaining illustration is carried out to the present invention.State simultaneously, embodiments described below for explaining only the invention, not
For limiting the present invention.
Present invention implementation provides a kind of chip under-voltage protecting circuit:
Fig. 1 is chip under-voltage protecting circuit function structure chart, as shown in Figure 1, chip under-voltage protecting circuit includes controlled opens
Close 100, switch control module 101 and voltage acquisition module 102；
The voltage acquisition module 102 is used for the supply voltage of access chip, to obtain detection voltage；
Wherein, chip can correspond to one or more supply voltages.Generally, the voltage swing between each supply voltage is different.
Voltage acquisition module 102 is used to correspond to the supply voltage of acquisition chip, i.e., voltage acquisition module 102 is corresponding acquires a power supply electricity
Pressure.Wherein, voltage acquisition module 102 carries out default processing to supply voltage, obtains detection electricity after collecting supply voltage
Pressure.In a kind of wherein embodiment, supply voltage size is proportional to detection voltage swing.
Fig. 2 is the chip under-voltage protecting circuit function structure chart of an embodiment, such as Fig. 2 in one of the embodiments,
Shown, voltage acquisition module 102 includes the first division module 200 and the second division module 201；
The first end of first division module 200 is used to correspond to the supply voltage of acquisition chip, and the of the first division module 200
Two ends connect the first end of the second division module, and the second end of the second division module 201 is for being grounded.
The second end connection switch control module 101 of first division module 200.
Wherein, there are potential differences between the supply voltage and ground potential of chip, and the first division module 200 and second divides mould
Block 201 is divided based on the potential difference between the two.According to the partial pressure ratio of the first division module 200 and the second division module,
The second end connection switch control module 101 of first division module 200, the voltage of the second end of the first division module 200 are
Detect voltage.
Fig. 3 is the chip under-voltage protecting circuit figure of an embodiment in one of the embodiments, as shown in figure 3, first
Division module 200 includes the first divider resistance R1, and the second division module 201 includes the second divider resistance R2.
One end of the controlled switch 100 is used to connect the protection pin comp of the chip, and the other end is for being grounded；
The switch control module 101 is used to control according to the detection voltage one end of the controlled switch 100 and another
One end on or off.
Corresponding detection voltage when being used for under-voltage according to the supply voltage of chip of switch control module 101, is connected controlled opens
One end and the other end for closing 100, are grounded the protection pin comp of chip.The corresponding detection when the supply voltage of chip is normal
Voltage, switch control module 101 are then connected according to one end that the detection voltage disconnects controlled switch 100 with the other end.
Fig. 4 is the chip under-voltage protecting circuit figure of another embodiment in one of the embodiments, is opened as shown in Figure 4
Closing control module 101 includes controllable accurate source of stable pressure D1；
The cathode of the controllable accurate source of stable pressure D1 is for accessing the supply voltage；
The anode of the controllable accurate source of stable pressure D1 is for being grounded；
The controllable end of the controllable accurate source of stable pressure D1 connects the voltage acquisition module 102, for accessing the detection
Voltage.
Wherein, the second end of the first division module 200 of controllable end connection of controllable accurate source of stable pressure D1, with access detection electricity
Pressure.When the supply voltage of chip is normal, the controllable end of controllable accurate source of stable pressure D1 receives corresponding detection voltage, makes controllable essence
The cathode of close source of stable pressure D1 is connected with positive interpolar；When the supply voltage of chip is under-voltage, the controllable end of controllable accurate source of stable pressure D1
Corresponding detection voltage is received, the cathode of controllable accurate source of stable pressure D1 and positive interpolar are turned off.
Switch control module 101 further includes current limliting module in one of the embodiments,；
The cathode of the controllable accurate source of stable pressure D1 is used to access the supply voltage by the current limliting module.
Wherein, in controllable accurate source of stable pressure D1, the cathode and anode of controllable accurate source of stable pressure D1 are limited by current limliting module
Between electric current, shield.
In one of the embodiments, as shown in figure 4, current limliting module includes current-limiting resistance Rl.
Fig. 5 is the chip under-voltage protecting circuit figure of a further embodiment in one of the embodiments, as shown in figure 5, by
Controlling switch 100 includes triode Q1；
The collector of the triode Q1 is used to connect the protection pin comp of the chip；
The emitter of the triode Q1 is for being grounded；
The base stage of the triode Q1 is for accessing the supply voltage.
Wherein, as shown in figure 5, when the supply voltage of chip is normal, the collector of triode Q1 is short-circuited, triode Q1
Shutdown.When the supply voltage of chip is under-voltage, the supply voltage of the collector access chip of triode Q1 and be connected, make chip
Protection pin comp access ground potential.
Triode Q1 includes NPN triode in one of the embodiments,.It should be noted that in the present embodiment, NPN
Triode is only a kind of embodiment, does not represent the restriction to triode Q1.
It in one of the embodiments, further include third division module and the 4th division module；
The base stage of the triode Q1 is used to access the supply voltage by the third division module, and for passing through
The 4th division module ground connection.
Wherein, by third division module and the 4th division module, the supply voltage of chip is handled, meets three poles
While the base stage turn-on condition of pipe Q1, the effect of current limliting is also functioned to, to protect triode Q1.
In one of the embodiments, as shown in figure 5, third division module includes third divider resistance R3, the 4th partial pressure
Module includes the 4th divider resistance R4.
Chip under-voltage protecting circuit further includes isolation module in one of the embodiments,；
The collector of the triode Q1 by the isolation module for being grounded.
By isolation module, the job stability of triode Q1 is improved.
In one of the embodiments, as shown in figure 5, isolation module includes isolation capacitance C.
The embodiment of the present invention also provides a kind of chip circuit；
Fig. 6 is chip circuit function structure chart, as shown in fig. 6, chip circuit includes chip 400 and any of the above-described embodiment
Chip under-voltage protecting circuit 401；
The chip under-voltage protecting circuit 401 includes controlled switch 100, switch control module 101 and voltage acquisition mould
Block 102；
The voltage acquisition module 102 is used to access the supply voltage of the chip, to obtain detection voltage；
One end of the controlled switch 100 connects the protection pin comp of the chip, and the other end is for being grounded；
The switch control module 101 is used to control according to the detection voltage one end of the controlled switch 100 and another
One end on or off.
Above-mentioned chip under-voltage protecting circuit and chip circuit pass through the power supply electricity of 102 acquisition chip of voltage acquisition module
Pressure, to obtain detection voltage.Wherein, when the corresponding supply voltage of detection voltage is under-voltage, switch control module 101 is used for basis
The detection voltage of voltage acquisition module 102 is connected one end and the other end of controlled switch 100, makes the protection pin comp of chip
Ground connection.Further, chip stops working after the grounding in its protection pin comp.Based on this, owed in the supply voltage of chip
When pressure, chip is closed in time, prevents chip because of under-voltage damage.
Each technical characteristic of above embodiments can be combined arbitrarily, for simplicity of description, not to above-described embodiment
In each technical characteristic it is all possible combination be all described, as long as however, the combination of these technical characteristics be not present lance
Shield all should be considered as described in this specification.
Only several embodiments of the present invention are expressed for above embodiments, and the description thereof is more specific and detailed, but can not
Therefore it is construed as limiting the scope of the patent.It should be pointed out that for those of ordinary skill in the art,
Under the premise of not departing from present inventive concept, various modifications and improvements can be made, and these are all within the scope of protection of the present invention.
Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of chip under-voltage protecting circuit, which is characterized in that including controlled switch, switch control module and voltage acquisition mould
Block；
The voltage acquisition module is used for the supply voltage of access chip, to obtain detection voltage；
One end of the controlled switch is used to connect the protection pin of the chip, and the other end is for being grounded；
The switch control module be used for according to the detection voltage, the one end for controlling the controlled switch be connected with the other end or
Shutdown.
2. chip under-voltage protecting circuit according to claim 1, which is characterized in that the voltage acquisition module includes first
Division module and the second division module；
The first end of first division module is for accessing the supply voltage, the second end connection of first division module
The first end of second division module, the second end of second division module is for being grounded；
The second end of first division module connects the switch control module, for exporting the detection voltage.
3. chip under-voltage protecting circuit according to claim 2, which is characterized in that first division module includes first
Divider resistance, second division module include the second divider resistance.
4. chip under-voltage protecting circuit according to claim 1, which is characterized in that the switch control module includes controllable
Precision voltage regulator；
The cathode of the controllable accurate source of stable pressure is for accessing the supply voltage；
The anode of the controllable accurate source of stable pressure is for being grounded；
The controllable end of the controllable accurate source of stable pressure connects the voltage acquisition module, for accessing the detection voltage.
5. chip under-voltage protecting circuit according to claim 4, which is characterized in that the switch control module further includes limit
Flow module；
The cathode of the controllable accurate source of stable pressure is used to access the supply voltage by the current limliting module.
6. chip under-voltage protecting circuit according to claim 1, which is characterized in that the controlled switch includes triode；
The collector of the triode is used to connect the protection pin of the chip；
The emitter of the triode is for being grounded；
The base stage of the triode is also used to access the supply voltage.
7. chip under-voltage protecting circuit according to claim 6, which is characterized in that further include third division module and the 4th
Division module；
The base stage of the triode is used to access the supply voltage by the third division module, and for passing through described the
Four division modules ground connection.
8. chip under-voltage protecting circuit according to claim 6, which is characterized in that further include isolation module；
The collector of the triode by the isolation module for being grounded.
9. according to chip under-voltage protecting circuit described in claim 6 to 8 any one, which is characterized in that the triode packet
Include NPN triode.
10. a kind of chip circuit, which is characterized in that under-voltage including chip and chip as claimed in any one of claims 1 to 9
Protect circuit；
The chip under-voltage protecting circuit includes controlled switch, switch control module and voltage acquisition module；
The voltage acquisition module is used to access the supply voltage of the chip, to obtain detection voltage；
One end of the controlled switch connects the protection pin of the chip, and the other end is for being grounded；
The switch control module be used for according to the detection voltage, the one end for controlling the controlled switch be connected with the other end or
Shutdown.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910129916.XA CN109873398A (en) | 2019-02-21 | 2019-02-21 | Chip under-voltage protecting circuit and chip circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910129916.XA CN109873398A (en) | 2019-02-21 | 2019-02-21 | Chip under-voltage protecting circuit and chip circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109873398A true CN109873398A (en) | 2019-06-11 |
Family
ID=66919115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910129916.XA Pending CN109873398A (en) | 2019-02-21 | 2019-02-21 | Chip under-voltage protecting circuit and chip circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109873398A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110112704A (en) * | 2019-06-19 | 2019-08-09 | 欣旺达电子股份有限公司 | Accessory power supply over under-voltage protection circuit |
| CN113359672A (en) * | 2021-06-17 | 2021-09-07 | 南方电网数字电网研究院有限公司 | Electric power system chip protection control circuit board and secondary equipment in electric power system |
| CN116885669A (en) * | 2023-09-08 | 2023-10-13 | 广东东菱电源科技有限公司 | MCU (micro control unit) controlled input voltage overvoltage and undervoltage protection circuit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200976485Y (en) * | 2006-11-30 | 2007-11-14 | 青岛海信电器股份有限公司 | Under-voltage protection circuitry |
| CN103579995A (en) * | 2012-08-01 | 2014-02-12 | 艾默生网络能源有限公司 | Direct-current input switching power source and undervoltage protection circuit thereof |
| CN203553906U (en) * | 2013-10-09 | 2014-04-16 | 珠海格力电器股份有限公司 | Protection circuit for input voltage of switch power supply |
| CN204361658U (en) * | 2014-12-30 | 2015-05-27 | 广州视源电子科技股份有限公司 | A kind of under-voltage protecting circuit |
| CN208046214U (en) * | 2018-03-13 | 2018-11-02 | 广州金升阳科技有限公司 | A kind of power supply module |
-
2019
- 2019-02-21 CN CN201910129916.XA patent/CN109873398A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200976485Y (en) * | 2006-11-30 | 2007-11-14 | 青岛海信电器股份有限公司 | Under-voltage protection circuitry |
| CN103579995A (en) * | 2012-08-01 | 2014-02-12 | 艾默生网络能源有限公司 | Direct-current input switching power source and undervoltage protection circuit thereof |
| CN203553906U (en) * | 2013-10-09 | 2014-04-16 | 珠海格力电器股份有限公司 | Protection circuit for input voltage of switch power supply |
| CN204361658U (en) * | 2014-12-30 | 2015-05-27 | 广州视源电子科技股份有限公司 | A kind of under-voltage protecting circuit |
| CN208046214U (en) * | 2018-03-13 | 2018-11-02 | 广州金升阳科技有限公司 | A kind of power supply module |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110112704A (en) * | 2019-06-19 | 2019-08-09 | 欣旺达电子股份有限公司 | Accessory power supply over under-voltage protection circuit |
| CN113359672A (en) * | 2021-06-17 | 2021-09-07 | 南方电网数字电网研究院有限公司 | Electric power system chip protection control circuit board and secondary equipment in electric power system |
| CN116885669A (en) * | 2023-09-08 | 2023-10-13 | 广东东菱电源科技有限公司 | MCU (micro control unit) controlled input voltage overvoltage and undervoltage protection circuit |
| CN116885669B (en) * | 2023-09-08 | 2024-01-12 | 广东东菱电源科技有限公司 | MCU (micro control unit) controlled input voltage overvoltage and undervoltage protection circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109873398A (en) | Chip under-voltage protecting circuit and chip circuit | |
| CN101957413B (en) | Relay protection device detection circuit | |
| PH12016501485B1 (en) | Electronic device and power adapter | |
| CN206349920U (en) | Power supply device with multi-stage soft start function | |
| CN101673961A (en) | Charge controlling semiconductor integrated circuit | |
| CN107181396B (en) | A kind of paralleling MOS Guan Junliu and short-circuit protection circuit | |
| CN105610129B (en) | Over voltage protects control circuit | |
| CN109245053A (en) | A kind of overload protecting circuit | |
| CN108039695B (en) | Overvoltage crowbar | |
| CN209462021U (en) | A kind of reverse connection preventing over-pressure safety device, earphone and USB charging unit | |
| CN108418186A (en) | A kind of under-voltage and short-circuit protection circuit of output | |
| CN106451391A (en) | Overcurrent protection peripheral circuit and electrical appliance | |
| CN208046210U (en) | A kind of protection circuit against input over-voltage and the Switching Power Supply comprising the circuit | |
| CN106443502A (en) | High-precision power supply ground floating port current detection and protection circuit | |
| CN105005346B (en) | Negative voltage clamp circuit | |
| CN110112703A (en) | Protect circuit | |
| CN104577968A (en) | Three-phase overvoltage, under-voltage and default phase integrated protection circuit | |
| CN218997679U (en) | MEC direct current power supply input protection circuit and MEC | |
| CN109088393A (en) | Under-voltage protecting circuit and electronic equipment | |
| CN106019170A (en) | Power adapter detecting device | |
| CN109066598A (en) | A kind of low level triggering latching circuit | |
| CN110417087A (en) | A kind of charging chip | |
| CN110021916A (en) | A kind of short circuit protecting circuit for switch power and its guard method | |
| CN108270199A (en) | A kind of output overvoltage protection circuit | |
| CN209642308U (en) | A kind of short circuit protecting circuit for switch power |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190611 |
|
| RJ01 | Rejection of invention patent application after publication |