CN209730853U - There is the emergency power supply driving circuit of reverse connecting protection - Google Patents
There is the emergency power supply driving circuit of reverse connecting protection Download PDFInfo
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- CN209730853U CN209730853U CN201920547453.4U CN201920547453U CN209730853U CN 209730853 U CN209730853 U CN 209730853U CN 201920547453 U CN201920547453 U CN 201920547453U CN 209730853 U CN209730853 U CN 209730853U
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Abstract
The utility model relates to a kind of emergency power supply driving circuits for having reverse connecting protection; including power supply, the first esd protection circuit, high-power drive circuit and emergency circuit; it further include reverse connecting protection isolating device; the reverse connecting protection isolating device and the first esd protection circuit and the first reverse connecting protection of electric power generating composition circuit, the high-power drive circuit and power supply constitute emergency driving circuit by emergency circuit.Since reverse connecting protection isolating device can be built in chip interior using the above scheme; and reverse connecting protection isolating device protects the first esd protection circuit; reverse connecting protection isolating device does not have to the entire load of protection; when there is the case where high current; high current does not flow through reverse connecting protection isolating device; to circuit high efficiency, and reverse connecting protection isolating device size is unrestricted, can be made small.
Description
Technical field
The utility model belongs to electronic field more particularly to a kind of emergency power supply driving circuit for having reverse connecting protection.
Background technique
Battery powered product is more and more, and most products do not have reverse connecting protection.And there is generally adopting for reverse connecting protection
Electric power loop is blocked using the one-way conduction characteristic of diode with external diode.The shortcomings that this method, is: 1. power consumptions
Greatly, general diode forward conduction voltage drop is 0.7V, and good conduction voltage drop is also in 0.3V.2. at high cost.3. in low pressure, by
In the influence of forward conduction voltage drop, cause chip effective voltage low, limits the minimum operating voltage of battery.
In number of patent application are as follows: 201621271964.0 utility model titles are as follows: a kind of game paddle battery reverse connecting protection
A kind of reverse battery protection circuit is disclosed in the patent of circuit and game paddle, which is adopted as the mode of external MOS
It is isolated.Although the method for external MOS, which can partially make up external diode design, leads to power consumption problems of too, once
High current is needed to power, the requirement to the conducting resistance of MOS is very harsh.And core must be accomplished for the pipe for being loaded with high current
Outside piece.In addition, then needing to flow through very big electric current since discharge current is big on metal-oxide-semiconductor or diode, causing power consumption big.It makes
At the waste of the energy, while battery cannot make the best use of everything.Limit the minimum operating voltage of battery.Emergency power supply as shown in figure 1 drives
Dynamic scheme carries out lithium ion battery protection due to needing to detect the state of lithium ion battery.It also needs to carry out judgement AC simultaneously
The state of power supply, if AC power supplies is short-circuit or at low-resistivity (< 2Mohm), lights emergency LED particle.Since power supply class drives
Circuit has required high-power electric current and has flowed through driving chip, meanwhile, energy-efficient market demands battery high efficiency as far as possible is badly in need of one
Kind improves the chip method of such simple external protection circuit.
Utility model content
The purpose of this utility model is that propose a kind of emergency power supply driving circuit for having reverse connecting protection, reverse connecting protection isolation
Device can be built in chip interior, and provide reverse connecting protection to the first esd protection circuit.
Implementer's case of the utility model is: having the emergency power supply driving circuit of reverse connecting protection, including power supply, first
Esd protection circuit, high-power drive circuit and emergency circuit further include reverse connecting protection isolating device, the reverse connecting protection isolation
Device and the first esd protection circuit and the first reverse connecting protection of electric power generating composition circuit, the high-power drive circuit and power supply are logical
It crosses the emergency circuit and constitutes emergency driving circuit.
Based on above-mentioned purpose, further improvement of the utility model scheme is: further including battery protection and battery powered
Internal module, the battery protection and battery powered internal module are parallel to the both ends of the first esd protection circuit.
Based on above-mentioned purpose, further improvement of the utility model scheme is: further including the second esd protection circuit, inside
Circuit, over-discharge protection circuit and overcharge protection circuit occur for VDD, and with inside VDD circuit phase occurs for second esd protection circuit
It is in parallel and returned with the reverse connecting protection isolating device, over-discharge protection circuit, overcharge protection circuit, the second reverse connecting protection of electric power generating composition
Road.
Based on above-mentioned purpose, further improvement of the utility model scheme is: it further include voltage-multiplying circuit, the internal VDD
The output that circuit occurs is connected to the input terminal of the voltage-multiplying circuit, and the output of the voltage-multiplying circuit is connected to the high-power drive
The control terminal of dynamic circuit.
Based on above-mentioned purpose, further improvement of the utility model scheme is: the high-power drive circuit includes the 4th N
The drain electrode of channel enhancement insulating gate type field effect tube, the 4th N-channel reinforced insulation grid-type field-effect tube is connected to power supply
Anode, the grid of the 4th N-channel reinforced insulation grid-type field-effect tube are connected to voltage-multiplying circuit output end, the 4th N ditch
The source electrode of road reinforced insulation grid-type field-effect tube is connected to the input terminal of emergency circuit.
Based on above-mentioned purpose, further improvement of the utility model scheme is: it further include substrate selects low potential circuit, it is described
Substrate selects low potential circuit to be in parallel with the high-power drive circuit.
Based on above-mentioned purpose, further improvement of the utility model scheme is: the reverse connecting protection isolating device includes the
The drain electrode of two P-channel enhancement type insulating gate type field effect tubes, the second P-channel enhancement type insulating gate type field effect tube is connected to electricity
The grid of the anode in source, the second P-channel enhancement type insulating gate type field effect tube is connected to power cathode through the first ESD resistance,
The source electrode of the second P-channel enhancement type insulating gate type field effect tube is connected with body electrode and is connected to the first ESD protection electricity
The one end on road, described the another of first esd protection circuit are connected to power cathode.
Based on above-mentioned purpose, further improvement of the utility model scheme is: the reverse connecting protection isolating device includes
First reverse connecting protection isolation circuit and the second reverse connecting protection isolation circuit, first esd protection circuit 104 and the first reversal connection are protected
It protects isolation circuit and battery constitutes the first reverse connecting protection circuit, circuit occurs for second esd protection circuit mutually simultaneously with inside VDD
Join and constitutes the second reverse connecting protection with the second reverse connecting protection isolation circuit, overcharge protection circuit, over-discharge protection circuit, battery and return
Road, the first reverse connecting protection isolation circuit include the 6th N-channel reinforced insulation grid-type field-effect tube, the first ESD protection electricity
One end on road is connected to anode, and the another of first esd protection circuit is connected to the 6th N-channel reinforced insulation grid-type field
The grid of the drain electrode of effect pipe, the 6th N-channel reinforced insulation grid-type field-effect tube is connected to anode through the 3rd ESD resistance,
The source electrode of 6th N-channel reinforced insulation grid-type field-effect tube is connected with body electrode and is connected to the cathode of battery；Second reversal connection is protected
Protecting isolation circuit includes the 7th N-channel reinforced insulation grid-type field-effect tube, and an end of the second esd protection circuit is being connected to battery just
Pole, another drain electrode for being connected to the 7th N-channel reinforced insulation grid-type field-effect tube, the 7th N-channel reinforced insulation grid-type field
The grid of effect pipe is connected to anode through the 4th ESD resistance, and the source electrode of the 7th N-channel reinforced insulation grid-type field-effect tube connects
To electrically and with overcharge protection circuit one end being connected, the another of overcharge protection circuit is connected to over-discharge protection circuit one end, mistake
The another of discharge protection circuit is connected to battery cathode.
Based on above-mentioned purpose, further improvement of the utility model scheme is: the reverse connecting protection isolating device includes
First reverse connecting protection isolation circuit and the second reverse connecting protection isolation circuit, first esd protection circuit 104 and the first reversal connection are protected
It protects isolation circuit and battery constitutes the first reverse connecting protection circuit, circuit occurs for second esd protection circuit mutually simultaneously with inside VDD
Join and constitutes the second reverse connecting protection with the second reverse connecting protection isolation circuit, overcharge protection circuit, over-discharge protection circuit, battery and return
Road, the first reverse connecting protection isolation circuit include the 6th N-channel reinforced insulation grid-type field-effect tube, the first ESD protection electricity
One end on road is connected to anode, and the another of first esd protection circuit is connected to the 6th N-channel reinforced insulation grid-type field
The grid of the drain electrode of effect pipe, the 6th N-channel reinforced insulation grid-type field-effect tube is connected to anode through the 3rd ESD resistance,
The source electrode of 6th N-channel reinforced insulation grid-type field-effect tube is connected with body electrode and is connected to the cathode of battery；Described second
Reverse connecting protection isolation circuit includes the 8th P-channel enhancement type insulating gate type field effect tube Q8, the 8th P-channel enhancement type insulated-gate type
The drain electrode of field-effect tube Q8 is connected with body electrode and is connected to the anode of battery, the 8th P-channel enhancement type insulating gate type field effect tube
The source electrode of Q8 is connected to the second esd protection circuit, and the grid of the 8th P-channel enhancement type insulating gate type field effect tube Q8 is through the 5th ESD
Resistance is connected to electrically.
Beneficial effect
The utility model is reversely connected and protects since reverse connecting protection isolating device using the above scheme can be built in chip interior
It protects isolating device and protects the first esd protection circuit, reverse connecting protection isolating device does not have to the entire load of protection, when the feelings for having high current
Condition, high current do not flow through reverse connecting protection isolating device, thus circuit high efficiency, and reverse connecting protection isolating device size is unrestricted
System, can be made small.
Detailed description of the invention:
Fig. 1 is prior art circuits schematic diagram；
Fig. 2 is the circuit block diagram of one reverse-connection protection circuit of the utility model embodiment；
Fig. 3 is that one reverse-connection protection circuit of the utility model embodiment refines circuit block diagram；
Fig. 4 is the circuit block diagram of two reverse-connection protection circuit of the utility model embodiment；
Fig. 5 is that two reverse-connection protection circuit of the utility model embodiment refines circuit block diagram；
Fig. 6 is the emergency power supply driving circuit circuit block diagram that the utility model has reverse connecting protection；
Fig. 7 is the emergency power supply driving circuit equivalent circuit diagram for having reverse connecting protection when the utility model battery is reversely connected；
Fig. 8 is the emergency power supply driving circuit block diagram that the utility model embodiment four has reverse connecting protection；
Fig. 9 is the emergency power supply driving circuit block diagram that the utility model embodiment five has reverse connecting protection.
Specific embodiment:
In order to be more clear principle and the advantage of the purpose of this utility model, technical solution, below in conjunction with attached drawing and tool
Body embodiment, the present invention will be further described in detail.In the present embodiment, described specific embodiment
It is only used to explain the utility model, is not used to limit the utility model.
Embodiment one
As shown in Fig. 2, Fig. 3 and Fig. 6, there are the emergency power supply driving circuit of reverse connecting protection, including power supply, the first ESD protection
Circuit 104, high-power drive circuit and emergency circuit, the power supply are battery, further include reverse connecting protection isolating device, the electricity
The anode in pond 101 is connected to reverse connecting protection isolating device, and reverse connecting protection isolating device is connected to the first esd protection circuit 104, and first
Esd protection circuit 104 is connected to power cathode 115, the reverse connecting protection isolating device and the first esd protection circuit 104 and battery
101 constitute the first reverse connecting protection circuit, and the high-power drive circuit and battery 101 constitute emergency driving by emergency circuit
Circuit.The reverse connecting protection isolating device is the second P-channel enhancement type insulating gate type field effect tube Q2, and second P-channel increases
The drain electrode of strong type insulating gate type field effect tube Q2 is connected to the anode of battery 101, the second P-channel enhancement type insulating gate type field effect tube
The grid of Q2 is connected to power cathode 115, the source of the second P-channel enhancement type insulating gate type field effect tube Q2 through the first ESD resistance 103
Pole is connected with body electrode and as internal electric source output end and is connected to one end of the first esd protection circuit 104, the first ESD protection
The another of circuit 104 is connected to power cathode 115.
Embodiment two
As shown in Fig. 4 to Fig. 5, there is an emergency power supply driving circuit of reverse connecting protection, including battery, the first esd protection circuit,
High-power drive circuit and emergency circuit, further include reverse connecting protection isolating device, and the anode of the battery is connected to the first ESD protection
Circuit on one side, the first esd protection circuit is another to be connected to reverse connecting protection isolating device one end, reverse connecting protection isolating device it is another
It is connected to battery cathode, first esd protection circuit, reverse connecting protection isolating device and battery constitute the first reverse connecting protection and return
Road, the high-power drive circuit and battery constitute emergency driving circuit by emergency circuit.The reverse connecting protection isolation dress
It sets including the 5th N-channel reinforced insulation grid-type field-effect tube Q5, the grid of the 5th N-channel reinforced insulation grid-type field-effect tube Q5
The 2nd ESD resistance of pole is connected to anode, and the drain electrode of the 5th N-channel reinforced insulation grid-type field-effect tube Q5 is connected to first
The other end of esd protection circuit, the source electrode and body electrode of the 5th N-channel reinforced insulation grid-type field-effect tube Q5 are connected to battery
Cathode.
Embodiment three
As shown in fig. 6, there is the emergency power supply driving circuit of reverse connecting protection, including battery, reverse connecting protection isolating device 102,
First esd protection circuit 104, battery protection and battery powered internal module 105, the second esd protection circuit 106, inside VDD
Circuit 107, over-discharge protection circuit 112 and overcharge protection circuit 113, voltage-multiplying circuit 109, high-power drive circuit 110, lining occurs
Low potential circuit 111 and emergency circuit 114 are selected in bottom, and the anode of the battery 101 is connected to reverse connecting protection isolating device 102, reversal connection
Protective separation device 102 is connected to the first esd protection circuit 104, and the first esd protection circuit 104 is connected to power cathode 115, described
Reverse connecting protection isolating device 102 and the first esd protection circuit 10 and battery 101 constitute the first reverse connecting protection circuit, and described is big
Power driving circuit and battery 101 pass through emergency circuit composition emergency driving circuit.The reverse connecting protection isolating device 102 is the
Two P-channel enhancement type insulating gate type field effect tube Q2, the drain electrode of the second P-channel enhancement type insulating gate type field effect tube Q2 connect
To the anode of battery 101, the grid of the second P-channel enhancement type insulating gate type field effect tube Q2 is connected to electricity through the first ESD resistance 103
The source electrode of source cathode 115, the second P-channel enhancement type insulating gate type field effect tube Q2 is connected and as internal electric source with body electrode
Another power supply that is connected to of 108 output ends and the one end for being connected to the first esd protection circuit 104, the first esd protection circuit 104 is born
Pole 115.The battery protection and battery powered internal module 105 are parallel to the both ends of the first esd protection circuit 104.It is described
Second esd protection circuit 106 be in parallel with inside VDD generation circuit 107 and with reverse connecting protection isolating device 102, overcharge protection
Circuit 113, over-discharge protection circuit 112, battery 101 constitute the second reverse connecting protection circuit., the second P-channel enhancement type insulated-gate type
The source electrode and body electrode of field-effect tube Q2 is connected and is connected to the second esd protection circuit 106 and be connected with inside VDD generation circuit 107
Circuit 1074 occur for one end, the second esd protection circuit 106 and inside VDD are connected another to be connected to 113 one end of overcharge protection circuit
And be connected with electrically 116, overcharge protection circuit 113 is another to be connected to 112 one end of over-discharge protection circuit, over-discharge protection circuit
112 another are connected to battery cathode 115.The output that circuit 107 occurs for internal VDD is connected to the input terminal of voltage-multiplying circuit 109, times
The output of volt circuit 109 is connected to the control terminal of high-power drive circuit 110, and the substrate selects low potential circuit 111 and big function
Rate driving circuit 110 is in parallel.The high-power drive circuit includes the 4th N-channel reinforced insulation grid-type field-effect tube Q4,
The drain electrode of the 4th N-channel reinforced insulation grid-type field-effect tube Q4 is connected to positive pole, the 4th N-channel reinforced insulation grid
The grid of type field-effect tube is connected to voltage-multiplying circuit output end, and the source electrode of the 4th N-channel reinforced insulation grid-type field-effect tube Q4 connects
To the input terminal of emergency circuit 114.
Example IV
As shown in figure 8, with embodiment three the difference is that: the reverse connecting protection isolating device include first reversal connection protect
Protect isolation circuit and the second reverse connecting protection isolation circuit, first esd protection circuit 104 and the first reverse connecting protection isolation circuit
The first reverse connecting protection circuit is constituted with battery 101,107 phase of circuit occurs for second esd protection circuit 106 simultaneously with inside VDD
Join and constitutes second instead with the second reverse connecting protection isolation circuit, overcharge protection circuit 113, over-discharge protection circuit 112, battery 101
Connect protective loop.First reverse connecting protection isolation circuit includes the 6th N-channel reinforced insulation grid-type field-effect tube Q6, and described first
One end of esd protection circuit 104 is connected to anode, and the another of first esd protection circuit 104 is connected to the 6th N-channel
The drain electrode of reinforced insulation grid-type field-effect tube Q6, the grid of the 6th N-channel reinforced insulation grid-type field-effect tube Q6 is through third
ESD resistance 1031 is connected to anode, the source electrode of the 6th N-channel reinforced insulation grid-type field-effect tube Q6 be connected with body electrode and
It is connected to the cathode of battery 101.Second reverse connecting protection isolation circuit includes the 7th N-channel reinforced insulation grid-type field-effect tube Q7,
One end of the second esd protection circuit 106 is connected to anode, another to be connected to the 7th N-channel reinforced insulation grid-type field-effect
The grid of the drain electrode of pipe Q7, the 7th N-channel reinforced insulation grid-type field-effect tube Q7 is connected to anode through the 4th ESD resistance,
The source electrode of 7th N-channel reinforced insulation grid-type field-effect tube Q7 be connected to electrically 116 and with 113 one end phase of overcharge protection circuit
Even, the another of overcharge protection circuit 113 is connected to 112 one end of over-discharge protection circuit, and the another of over-discharge protection circuit 112 is connected to
Battery cathode 115.
Embodiment five
As shown in figure 9, the difference is that, the second reverse connecting protection isolation circuit includes the 8th P with example IV
Channel enhancement insulating gate type field effect tube Q8, the drain electrode of the 8th P-channel enhancement type insulating gate type field effect tube Q8 and body electrode
It is connected and is connected to the anode of battery, the source electrode of the 8th P-channel enhancement type insulating gate type field effect tube Q8 is connected to the 2nd ESD protection electricity
Circuit 107 occurs for road 106 and inside VDD, and the grid of the 8th P-channel enhancement type insulating gate type field effect tube Q8 is through the 5th ESD electricity
Resistance is connected to electrically.
The target application of the design is the driving circuit of emergency LED, and the utility model only connects protection portion with regard to its cell anti-reverse
Divide and is illustrated.
116 pairs by 101 positive terminal of battery and electrically battery chargings of external power supply, overcharge, over-discharge protection circuit protection
Battery, and battery charging and discharging is managed.
102 are reversely connected voltage clamping pipe for battery control section, and 103 be the first ESD resistance, and the first esd protection circuit 104 is
Battery protection and the ESD protection of battery powered internal module part protect battery protection and battery powered internal module
105,105 be battery protection and battery powered internal module.112 be over-discharge protection circuit, and 113 be overcharge protection circuit, 112
And 113 be serially connected between battery cathode end 115 and electrically 116.115 be the negative pole end of battery, while being also the first ESD protection
Circuit 104 and battery protection and battery powered internal module 105 are electrically.Electrically 116 be the second esd protection circuit
106, the electricity that circuit 107, voltage-multiplying circuit 109, high-power drive circuit 110, substrate select low potential circuit 111 occurs for inside VDD
Learn ground.Second esd protection circuit 106 is the ESD protection being connected across between internal electric source 108 and electrically 116, and protection is internal
VDD occurs circuit 107, voltage-multiplying circuit 109, high-power drive circuit 110 and substrate and low potential circuit 111 is selected not broken by electrostatic
It is bad.107 be internal VDD generation circuit, and the voltage of high pressure is converted to low pressure workable for chip interior.This voltage is supplied to again
Volt circuit 109 generates the voltage for being higher than one times of 114 voltage of load, for driving high-power drive circuit 110.Due to load 114
Current potential in system application process may external other driving, and generate the positive terminal for being higher than high-power drive circuit 110
Current potential, therefore low potential selection circuit, that is, substrate is added and selects low potential circuit 111, it is ensured that the substrate diode of metal-oxide-semiconductor will not be different
Often conducting.
As shown in fig. 7, for when battery is reversely connected generation, with reference to equivalent circuit diagram, from Fig. 7, it can be seen that battery 101
It is reversely connected in reversal connection battery 201, but the second P-channel enhancement type insulating gate type field effect tube 102 is equivalent to the in Fig. 7
One diode 202, by the current path flowed out from reversal connection 201 lithium ion cell positive end of battery.Over-discharge protection circuit 112
It is equivalent to the first equivalent switch 207 and the second equivalent switch 208 respectively with overcharge protection circuit 113, due to lithium ion battery pipe
Reason is partially due to the reversal connection of lithium ion battery causes first esd protection circuit of partial circuit 104 and battery protection and battery to supply
Electricity internal module 105 be equivalent to the second diode and third diode 203, i.e., at this time approximation circuit floating in lithium ion battery
Positive point on, although therefore 112 switching tube of over-discharge protection circuit close, the conducting of body knot is equivalent to first and equivalent opens
Close 207.113 is in the conductive state at this moment, is equivalent to the second equivalent switch 208.Light-emitting LED pipe is loaded due to reversely by work
201 anode of battery is reversely connected to the access between cathode with having blocked.No matter the third equivalent of high-power drive circuit 110 is opened at this time
Close whether 205 be connected, the access of lithium ion cell positive to the cathode of reversal connection is blocked.
Use above specific case is illustrated the utility model, is merely used to help understand the utility model, and
Not to limit the utility model.Think of for those skilled in the art of the present invention, according to the utility model
Think, several simple deductions, deformation or replacement can also be made.
Claims (9)
1. there is the emergency power supply driving circuit of reverse connecting protection, including power supply, the first esd protection circuit, high-power drive circuit and
Emergency circuit, it is characterised in that: further include reverse connecting protection isolating device, the reverse connecting protection isolating device and the first ESD are protected
Circuit and the first reverse connecting protection of electric power generating composition circuit, the high-power drive circuit are made up of with power supply the emergency circuit
Emergency driving circuit.
2. the emergency power supply driving circuit according to claim 1 for having reverse connecting protection, it is characterised in that: further include that battery is protected
Shield and battery powered internal module, the battery protection and battery powered internal module are parallel to the first esd protection circuit
Both ends.
3. the emergency power supply driving circuit according to claim 2 for having reverse connecting protection, it is characterised in that: further include second
Circuit, over-discharge protection circuit and overcharge protection circuit occur for esd protection circuit, inside VDD, second esd protection circuit with
Internal VDD occur circuit be in parallel and with the reverse connecting protection isolating device, over-discharge protection circuit, overcharge protection circuit, power supply
Constitute the second reverse connecting protection circuit.
4. the emergency power supply driving circuit according to claim 3 for having reverse connecting protection, it is characterised in that: further include a times piezoelectricity
Road, the output that circuit occurs for the internal VDD are connected to the input terminal of the voltage-multiplying circuit, the output termination of the voltage-multiplying circuit
To the control terminal of the high-power drive circuit.
5. the emergency power supply driving circuit according to claim 4 for having reverse connecting protection, it is characterised in that: the high-power drive
Dynamic circuit includes the 4th N-channel reinforced insulation grid-type field-effect tube, the 4th N-channel reinforced insulation grid-type field-effect tube
Drain electrode be connected to positive pole, the grid of the 4th N-channel reinforced insulation grid-type field-effect tube is connected to voltage-multiplying circuit output
End, the source electrode of the 4th N-channel reinforced insulation grid-type field-effect tube are connected to the input terminal of emergency circuit.
6. the emergency power supply driving circuit according to claim 5 for having reverse connecting protection, it is characterised in that: further include substrate choosing
Low potential circuit, the substrate select low potential circuit to be in parallel with the high-power drive circuit.
7. according to claim 1 to the emergency power supply driving circuit for having reverse connecting protection described in any one of 6 claims,
Be characterized in that: the reverse connecting protection isolating device includes the second P-channel enhancement type insulating gate type field effect tube, the 2nd P ditch
The drain electrode of road reinforced insulation grid-type field-effect tube is connected to the anode of power supply, the second P-channel enhancement type insulated-gate type field effect
Should the grid of pipe be connected to power cathode, the source electrode of the second P-channel enhancement type insulating gate type field effect tube through the first ESD resistance
It is connected and is connected to one end of first esd protection circuit with body electrode, described the another of first esd protection circuit is connected to electricity
Source cathode.
8. the emergency power supply driving circuit according to claim 3 for having reverse connecting protection, it is characterised in that: the reversal connection is protected
Protecting isolating device includes the first reverse connecting protection isolation circuit and the second reverse connecting protection isolation circuit, first esd protection circuit
The first reverse connecting protection circuit, second esd protection circuit and inside VDD are constituted with the first reverse connecting protection isolation circuit and battery
Circuit occurs to be in parallel and constitute second with the second reverse connecting protection isolation circuit, overcharge protection circuit, over-discharge protection circuit, battery
Reverse connecting protection circuit, the first reverse connecting protection isolation circuit include the 6th N-channel reinforced insulation grid-type field-effect tube, described first
One end of esd protection circuit is connected to anode, and to be connected to the 6th N-channel enhanced by first esd protection circuit another
The grid of the drain electrode of insulating gate type field effect tube, the 6th N-channel reinforced insulation grid-type field-effect tube is connected to through the 3rd ESD resistance
The source electrode of anode, the 6th N-channel reinforced insulation grid-type field-effect tube is connected with body electrode and is connected to the cathode of battery；The
Two reverse connecting protection isolation circuits include the 7th N-channel reinforced insulation grid-type field-effect tube, a termination of the second esd protection circuit
To anode, another drain electrode for being connected to the 7th N-channel reinforced insulation grid-type field-effect tube, the 7th N-channel it is enhanced absolutely
The grid of edge grid-type field-effect tube is connected to anode, the 7th N-channel reinforced insulation grid-type field-effect tube through the 4th ESD resistance
Source electrode be connected to electrically and be connected with overcharge protection circuit one end, the another of overcharge protection circuit is connected to over-discharge protection circuit
One end, the another of over-discharge protection circuit are connected to battery cathode.
9. the emergency power supply driving circuit according to claim 3 for having reverse connecting protection, it is characterised in that: the reversal connection is protected
Protecting isolating device includes the first reverse connecting protection isolation circuit and the second reverse connecting protection isolation circuit, first esd protection circuit
The first reverse connecting protection circuit, second esd protection circuit and inside VDD are constituted with the first reverse connecting protection isolation circuit and battery
Circuit occurs to be in parallel and constitute second with the second reverse connecting protection isolation circuit, overcharge protection circuit, over-discharge protection circuit, battery
Reverse connecting protection circuit, the first reverse connecting protection isolation circuit include the 6th N-channel reinforced insulation grid-type field-effect tube, described first
One end of esd protection circuit is connected to anode, and to be connected to the 6th N-channel enhanced by first esd protection circuit another
The grid of the drain electrode of insulating gate type field effect tube, the 6th N-channel reinforced insulation grid-type field-effect tube is connected to through the 3rd ESD resistance
The source electrode of anode, the 6th N-channel reinforced insulation grid-type field-effect tube is connected with body electrode and is connected to the cathode of battery；Institute
The the second reverse connecting protection isolation circuit stated includes the 8th P-channel enhancement type insulating gate type field effect tube Q8, the 8th P-channel enhancement type
The drain electrode of insulating gate type field effect tube Q8 is connected with body electrode and is connected to the anode of battery, the 8th P-channel enhancement type insulated-gate type
The source electrode of field-effect tube Q8 is connected to the second esd protection circuit, the grid warp of the 8th P-channel enhancement type insulating gate type field effect tube Q8
5th ESD resistance is connected to electrically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920547453.4U CN209730853U (en) | 2019-04-22 | 2019-04-22 | There is the emergency power supply driving circuit of reverse connecting protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920547453.4U CN209730853U (en) | 2019-04-22 | 2019-04-22 | There is the emergency power supply driving circuit of reverse connecting protection |
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| Publication Number | Publication Date |
|---|---|
| CN209730853U true CN209730853U (en) | 2019-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920547453.4U Active CN209730853U (en) | 2019-04-22 | 2019-04-22 | There is the emergency power supply driving circuit of reverse connecting protection |
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| Country | Link |
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| CN (1) | CN209730853U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110048478A (en) * | 2019-04-22 | 2019-07-23 | 上海芯荃微电子科技有限公司 | There is the emergency power supply driving circuit of reverse connecting protection |
-
2019
- 2019-04-22 CN CN201920547453.4U patent/CN209730853U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110048478A (en) * | 2019-04-22 | 2019-07-23 | 上海芯荃微电子科技有限公司 | There is the emergency power supply driving circuit of reverse connecting protection |
| CN110048478B (en) * | 2019-04-22 | 2024-05-17 | 上海芯荃微电子科技有限公司 | Emergency power supply driving circuit with reverse connection protection |
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