CN206671932U - Wide input voltage range voltage adjustment chip provided with reverse-connection protection circuit - Google Patents
Wide input voltage range voltage adjustment chip provided with reverse-connection protection circuit Download PDFInfo
- Publication number
- CN206671932U CN206671932U CN201720322108.1U CN201720322108U CN206671932U CN 206671932 U CN206671932 U CN 206671932U CN 201720322108 U CN201720322108 U CN 201720322108U CN 206671932 U CN206671932 U CN 206671932U
- Authority
- CN
- China
- Prior art keywords
- pmos
- voltage
- reverse
- nmos tube
- drain electrode
- 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.)
- Active
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
Technical field of integrated circuits is the utility model is related to, specifically, is related to a kind of wide input voltage range voltage adjustment chip provided with reverse-connection protection circuit.It includes voltage stabilizing branch road, first order discharge circuit and second level discharge circuit, voltage stabilizing branch road includes first resistor and Zener diode, first order discharge circuit includes the first NMOS tube, second resistance, the second NMOS tube and 3rd resistor, and second level discharge circuit includes the first PMOS, the second PMOS and the 3rd PMOS；The utility model preferably can be operated in the case of wide input voltage.
Description
Technical field
Technical field of integrated circuits is the utility model is related to, specifically, is related to a kind of width provided with reverse-connection protection circuit
Input voltage range voltage adjusts chip.
Background technology
The chip product for being largely used to the fields such as Industry Control, automotive electronics, small household appliances is generally required in very wide power supply
Work in voltage range, for example high voltage is likely to be breached 35V, low-voltage may only have 2V, existing chip product be difficult compared with
Meet the job requirement of wide input voltage range in the case of low manufacturing cost.
On the other hand, such chip is in actual use, it may appear that power supply and the situation of ground reversal connection, now can be in chip
Portion forms a larger electric current (especially chip is in high-pressure work), so as to likely result in burning for chip.
Utility model content
Content of the present utility model is to provide a kind of wide input voltage range voltage adjustment core provided with reverse-connection protection circuit
Piece, it can overcome certain or some defects of prior art.
Chip is adjusted according to the wide input voltage range voltage of the present utility model provided with reverse-connection protection circuit, it is included surely
Pressure branch road, first order discharge circuit and second level discharge circuit, voltage stabilizing branch road include first resistor and Zener diode, the first order
Discharge circuit includes the first PMOS, the second PMOS, the first NMOS tube, the second NMOS tube and second resistance, second level amplifier
Circuit includes the 3rd PMOS and 3rd resistor；
First resistor and Zener diode are sequentially connected between chip power supply end and common ground end and Zener diode
It is oppositely arranged, reference voltage end is formed between first resistor and Zener diode；
The source electrode of reference voltage end the first NMOS tube grid of access, the first NMOS tube and the second NMOS tube passes through the second electricity
Resistance access common ground end, 3rd resistor is between the grid of the second NMOS tube and common ground end；
By forming common electrical source after a reverse-connection protection circuit, the source electrode access of the first PMOS is public at chip power supply end
The drain electrode of power end, drain electrode the first NMOS tube of access, the source electrode access common electrical source of the second PMOS, drain electrode access second
The drain electrode of NMOS tube, the first PMOS and the second PMOS grid access the drain electrode of the second PMOS；The source of 3rd PMOS
Common electrical source is accessed in pole, and the grid of the 3rd PMOS accesses the drain electrode of the first PMOS, the drain electrode output of the 3rd PMOS
To adjust voltage end, adjustment voltage end accesses the grid of the second NMOS tube.
The utility model has following working condition in normal work：
1st, when the voltage at chip power supply end is more than the voltage of voltage regulation of Zener diode, Zener diode, which is operated in, reversely to be hit
Wear state, so when reference voltage end at can produce a magnitude of voltage being basically stable at Zener diode voltage of voltage regulation；
2nd, when the voltage at chip power supply end is less than the voltage of voltage regulation of Zener diode, it is insufficient to allow Zener diode to enter
Reverse breakdown state, therefore Zener diode can be operated in high-impedance state, the electric current now flowed through at first resistor also can be very small,
So when reference voltage end voltage can be approximately equal to the voltage at chip power supply end.
In two kinds of above-mentioned working conditions, when the voltage of feeder ear is in more than 2V, electricity that reference voltage end is provided
Pressure can open the first NMOS tube, and this will drag down the grid voltage of the 3rd PMOS, so as to cause opening for the 3rd PMOS
Open and so that the 3rd PMOS is operated in depth linear zone or saturation region, so that whole chip enters normal operating conditions.
In addition, when the voltage at chip power supply end is more than the voltage of voltage regulation of Zener diode, in first order discharge circuit and
In the presence of the discharge circuit of the second level, adjustment voltage end can export a basicly stable voltage, and, adjust the defeated of voltage end
Go out the voltage that voltage can be approximately equal at reference voltage end；When the voltage at chip power supply end is less than the voltage of voltage regulation of Zener diode
When, the voltage that adjustment voltage end can preferably be stablized at chip power supply end is subtracted at reverse-connection protection circuit and the 3rd PMOS
Value after the loss of voltage.
On the other hand, the utility model is in reversal connection, due to the presence of reverse-connection protection circuit, so as to the first order be caused to transport
Other circuits that electric discharge road, second level discharge circuit and adjustment voltage end are powered do not have reverse current and flowed through, so as to
Reversed protection preferably is carried out to it.In addition, though can exist in the voltage stabilizing branch road being made up of first resistor and Zener diode
Certain electric current, but because the resistance of first resistor is generally large, therefore the electric current is also smaller, and chip will not be caused in itself
Influence.
To sum up, after the utility model will preferably can be adjusted to wide input voltage, exported relatively stablely.
And the design of reverse-connection protection circuit, it also can preferably ensure that the safety of chip internal circuits or device.
Preferably, reverse-connection protection circuit includes a reverse connecting protection pipe, reverse connecting protection pipe uses PMOS；Reverse connecting protection pipe
Between chip power supply end and common electrical source, the grid of reverse connecting protection pipe accesses the drain electrode of the first PMOS.
In the utility model, when chip is in normal operating conditions, reverse connecting protection pipe can because of dragging down for grid voltage and
Open and be operated in depth linear zone and then preferably ensure that the normal operation of whole circuit；Reversal connection state is in chip
When, reverse connecting protection pipe can turn off, and then can preferably avoid flowing through for larger reverse current, so as to preferably serve reversal connection
Defencive function.Further, since the grid of reverse connecting protection pipe is directly accessed the drain electrode of the first PMOS, thus will not be to the face of chip
Product or manufacturing cost cause too big lifting.
Preferably, the voltage of voltage regulation of Zener diode is 6V.
Brief description of the drawings
Fig. 1 is that a kind of wide input voltage range voltage provided with reverse-connection protection circuit in embodiment 1 adjusts showing for chip
It is intended to；
Fig. 2 is that a kind of wide input voltage range voltage provided with reverse-connection protection circuit in embodiment 1 adjusts the interior of chip
Portion's circuit diagram.
Embodiment
To further appreciate that content of the present utility model, the utility model is described in detail in conjunction with the accompanying drawings and embodiments.
It should be appreciated that embodiment be only the utility model is explained and and it is non-limiting.
Embodiment 1
As shown in figure 1, present embodiments provide a kind of wide input voltage range voltage adjustment provided with reverse-connection protection circuit
Chip, it includes voltage stabilizing branch road, first order discharge circuit and second level discharge circuit, and voltage stabilizing branch road is including first resistor R1 and together
Receive diode D1, first order discharge circuit includes the first PMOS Tp1, the second PMOS Tp2, the first NMOS tube Tn1, second
NMOS tube Tn2 and second resistance R2, second level discharge circuit include the 3rd PMOS Tp4 and 3rd resistor R3；
First resistor R1 and Zener diode D1 be sequentially connected between chip power supply end VDD and common ground end VSS and
Zener diode D1 is oppositely arranged, and reference voltage end Vref is formed between first resistor R1 and Zener diode D1；
Reference voltage end Vref accesses the source of the first NMOS tube Tn1 grids, the first NMOS tube Tn1 and the second NMOS tube Tn2
Extremely common ground end VSS, 3rd resistor R3 is accessed by second resistance R2 to connect with public located at the second NMOS tube Tn2 grid
Between ground terminal VSS；
Chip power supply end VDD is by forming common electrical source Vcom, the first PMOS Tp1 source after a reverse-connection protection circuit
Pole access common electrical source Vcom, the first NMOS tube Tn1 of drain electrode access drain electrode, the second PMOS Tp2 source electrode access are public
Power end Vcom, the second NMOS tube Tn2 of drain electrode access drain electrode, the first PMOS Tp1 and the second PMOS Tp2 grids access
Second PMOS Tp2 drain electrode；3rd PMOS Tp4 source electrode access common electrical source Vcom, the 3rd PMOS Tp4 grid
The first PMOS Tp1 drain electrode is accessed, the 3rd PMOS Tp4 drain electrode output is adjustment voltage end Vreg, adjusts voltage end
Vreg accesses the second NMOS tube Tn2 grid.
As shown in Fig. 2 reverse-connection protection circuit includes a reverse connecting protection pipe Tp3, reverse connecting protection pipe Tp3 uses PMOS；Instead
Meet protection pipe Tp3 to be located between chip power supply end VDD and common electrical source Vcom, reverse connecting protection pipe Tp3 grid access first
PMOS Tp1 drain electrode.
In the present embodiment, Zener diode D1 voltage of voltage regulation is 6V.
In the present embodiment, during voltage VDD ＞ 6V at the VDD of chip power supply end, Vreg ≈ Vref, Vreg are adjustment voltage
The output voltage at Vreg is held, Vref is reference voltage end Vref voltage；As chip power supply end VDD≤6V, Vreg ≈
(VDD-0.2) V, 0.2V herein is the source-drain voltage loss at reverse connecting protection pipe Tp3 and the 3rd PMOS Tp4.
Schematically the utility model and embodiments thereof are described above, this describes no restricted, accompanying drawing
Shown in be also one of embodiment of the present utility model, actual structure is not limited thereto.So if this area
Those of ordinary skill enlightened by it, do not depart from the utility model create objective in the case of, without creativeness design
The frame mode similar to the technical scheme and embodiment, the scope of protection of the utility model all should be belonged to.
Claims (3)
1. the wide input voltage range voltage adjustment chip provided with reverse-connection protection circuit, it is characterised in that：Including voltage stabilizing branch road,
One-level discharge circuit and second level discharge circuit, voltage stabilizing branch road include first resistor (R1) and Zener diode (D1), the first order
Discharge circuit include the first PMOS (Tp1), the second PMOS (Tp2), the first NMOS tube (Tn1), the second NMOS tube (Tn2) and
Second resistance (R2), second level discharge circuit include the 3rd PMOS (Tp4) and 3rd resistor (R3)；
First resistor (R1) and Zener diode (D1) be sequentially connected to chip power supply end (VDD) and common ground end (VSS) it
Between and Zener diode (D1) it is oppositely arranged, form reference voltage end between first resistor (R1) and Zener diode (D1)
(Vref)；
Reference voltage end (Vref) accesses the first NMOS tube (Tn1) grid, the first NMOS tube (Tn1) and the second NMOS tube (Tn2)
Source electrode common ground end (VSS) is accessed by second resistance (R2), 3rd resistor (R3) is located at the second NMOS tube (Tn2)
Between grid and common ground end (VSS)；
Chip power supply end (VDD) by after a reverse-connection protection circuit formed common electrical source (Vcom), the first PMOS (Tp1)
The drain electrode of source electrode access common electrical source (Vcom), drain electrode the first NMOS tube of access (Tn1), the source electrode of the second PMOS (Tp2)
Access the drain electrode of common electrical source (Vcom), drain electrode the second NMOS tube of access (Tn2), the first PMOS (Tp1) and the 2nd PMOS
Pipe (Tp2) grid accesses the second PMOS (Tp2) drain electrode；The source electrode access common electrical source of 3rd PMOS (Tp4)
(Vcom), the grid of the 3rd PMOS (Tp4) accesses the drain electrode of the first PMOS (Tp1), the drain electrode of the 3rd PMOS (Tp4)
Export and access the grid of the second NMOS tube (Tn2) for adjustment voltage end (Vreg), adjustment voltage end (Vreg).
2. the wide input voltage range voltage adjustment chip according to claim 1 provided with reverse-connection protection circuit, its feature
It is：Reverse-connection protection circuit includes a reverse connecting protection pipe (Tp3), and reverse connecting protection pipe (Tp3) uses PMOS；Reverse connecting protection pipe
(Tp3) it is located between chip power supply end (VDD) and common electrical source (Vcom), the grid access first of reverse connecting protection pipe (Tp3)
The drain electrode of PMOS (Tp1).
3. the wide input voltage range voltage adjustment chip according to claim 1 provided with reverse-connection protection circuit, its feature
It is：The voltage of voltage regulation of Zener diode (D1) is 6V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720322108.1U CN206671932U (en) | 2017-03-30 | 2017-03-30 | Wide input voltage range voltage adjustment chip provided with reverse-connection protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720322108.1U CN206671932U (en) | 2017-03-30 | 2017-03-30 | Wide input voltage range voltage adjustment chip provided with reverse-connection protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206671932U true CN206671932U (en) | 2017-11-24 |
Family
ID=60373589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720322108.1U Active CN206671932U (en) | 2017-03-30 | 2017-03-30 | Wide input voltage range voltage adjustment chip provided with reverse-connection protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206671932U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110311668A (en) * | 2019-07-05 | 2019-10-08 | 上海趣致网络科技股份有限公司 | A kind of chip output pin forward direction over-voltage and reverse voltage protection circuit and method |
| CN116736924A (en) * | 2023-08-11 | 2023-09-12 | 荣湃半导体（上海）有限公司 | Voltage stabilizing source circuit with wide input range and low power consumption and electronic equipment |
-
2017
- 2017-03-30 CN CN201720322108.1U patent/CN206671932U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110311668A (en) * | 2019-07-05 | 2019-10-08 | 上海趣致网络科技股份有限公司 | A kind of chip output pin forward direction over-voltage and reverse voltage protection circuit and method |
| CN110311668B (en) * | 2019-07-05 | 2022-11-04 | 上海趣致网络科技有限公司 | Chip output pin forward overvoltage and reverse voltage protection circuit and method |
| CN116736924A (en) * | 2023-08-11 | 2023-09-12 | 荣湃半导体（上海）有限公司 | Voltage stabilizing source circuit with wide input range and low power consumption and electronic equipment |
| CN116736924B (en) * | 2023-08-11 | 2023-11-03 | 荣湃半导体（上海）有限公司 | Voltage stabilizing source circuit with wide input range and low power consumption and electronic equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI493318B (en) | Internal supply voltage generation circuit | |
| CN102790516B (en) | Feedback clamping power metal oxide semiconductor (MOS) pipe drive circuit for power supply management | |
| CN107134991B (en) | Drive circuit for driving power transistor | |
| CN102082430A (en) | Surge suppression circuit | |
| CN105938815A (en) | Electrostatic protection circuit | |
| CN107179800B (en) | A kind of internal electric source generation circuit with clamper function | |
| CN103401229A (en) | Voltage triggering static discharge clamping circuit with feedback strengthening effect | |
| CN103941798A (en) | Low dropout regulator | |
| CN106959721A (en) | Low pressure difference linear voltage regulator | |
| CN206671932U (en) | Wide input voltage range voltage adjustment chip provided with reverse-connection protection circuit | |
| CN102231518A (en) | Surging suppression circuit | |
| CN106656148A (en) | Two-way IO circuit for preventing current from flowing backwards | |
| CN105388954B (en) | Linear voltage regulator circuit | |
| CN106160419B (en) | Low voltage difference voltage-stabilized power supply circuit structure | |
| CN104635824A (en) | Low dropout regulator and related method | |
| CN111193506B (en) | Low-power consumption PMOS pipe substrate switching circuit with voltage isolation | |
| CN103631303B (en) | For the soft starting circuit of stabilized voltage supply chip | |
| CN103217615B (en) | Output short-circuit detection circuit | |
| CN103376423A (en) | Power supply detection device | |
| CN105676929B (en) | A kind of anti-output rushes LDO start-up circuit | |
| CN105322789B (en) | Adjuster circuit | |
| CN107919653A (en) | Reverse-current protection circuit for on-off circuit | |
| CN105929886A (en) | Reference Voltage Circuit And Electronic Device | |
| CN106330172B (en) | The transmission gate of high voltage threshold device and its subsequent pull-down circuit structure | |
| CN208241310U (en) | A kind of current foldback circuit and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Room 1210-11, 198 Wudong Road, Yangpu District, Shanghai 200082 Patentee after: Shanghai Xinyan Microelectronics Co., Ltd. Address before: Room 1210-11, 198 Wudong Road, Yangpu District, Shanghai 200082 Patentee before: GOCHIP ELECTRONICS TECHNOLOGY CO.,LTD. |