CN207884273U - A kind of IP phone power supply protection circuit - Google Patents
A kind of IP phone power supply protection circuit Download PDFInfo
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- CN207884273U CN207884273U CN201721923545.5U CN201721923545U CN207884273U CN 207884273 U CN207884273 U CN 207884273U CN 201721923545 U CN201721923545 U CN 201721923545U CN 207884273 U CN207884273 U CN 207884273U
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Abstract
The utility model discloses a kind of IP phone power supply protection circuits; it is used to control the voltage that power supply adaptor is provided to IP phone comprising resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, zener diode Z1, P-channel metal-oxide-semiconductor Q1, PNP type triode Q2 and NPN type triode Q3.The utility model controls the break-make of P-channel metal-oxide-semiconductor Q1 to realize over-voltage protecting function by the stabilizing voltage characteristic of zener diode Z1 by controlling PNP type triode Q2 break-makes, the bleeder circuit that the utility model is also made up of resistance R3 and resistance R4 is come the break-make of control P-channel metal-oxide-semiconductor Q1 control the break-make of NPN type triode Q3 by realize under-voltage protection function；Therefore the utility model can prevent from damaging IP phone due to IP phone wrong plug adapter, and the circuit structure of the utility model is simple, at low cost.
Description
Technical field
The utility model is related to electronic circuit fields, particularly relate to a kind of IP circuits power supply protection circuit.
Background technology
IP phone（Abbreviation VoIP is originated from English Voice over Internet Protocol；Also known as wideband telephony or net
Network phone）, it is a kind of through internet or other use IP technologies network, to realize novel telephonic communication, in Internet
The upper application by ICP/IP protocol real-time delivery of voice information.
In the prior art, for the ease of the deployment of IP phone, IP phone is provided with portable power supply adapters, and in order to
Versatility considers that the socket that the plug of power supply source adapter is inserted on IP phone is all generic encapsulation, this there is IP phone and inserts
The case where entering unmatched power supply adaptor and leading to IP phone operation irregularity.When the power adapter voltage mistake that IP phone is inserted into
Height can cause power supply IP phone to burn；And the power adapter voltage for working as IP phone insertion is too low, and IP phone work can be caused different
Often.Therefore IP phone needs a kind of power supply protection phone.
Utility model content
The purpose of this utility model is to provide a kind of IP phone power supply protection circuit, is used to control power supply adaptor to IP
The voltage that phone provides, has overvoltage protection and under-voltage protection function, prevents due to IP phone wrong plug adapter and to IP electricity
Damage caused by words.
In order to achieve the above objectives, the solution of the utility model is：
A kind of IP phone power supply protection circuit is used to control the voltage that power supply adaptor is provided to IP phone comprising
Resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, zener diode Z1, P-channel metal-oxide-semiconductor Q1, three pole of positive-negative-positive
Pipe Q2, NPN type triode Q3 and the input terminal for being connected with power supply adaptor and the power end for IP phone are connected
Output end；The input terminal, one end of resistance R3, positive-negative-positive of one end of the resistance R1 and the IP phone power supply protection circuit
The source electrode of the emitter of triode Q2, one end of resistance R5 and P-channel metal-oxide-semiconductor Q1 is connected, the other end of resistance R1 and voltage stabilizing
The cathode of diode Z1 and one end of resistance R2 are connected, the plus earth of zener diode Z1, the other end and PNP of resistance R2
The base stage of type triode Q2 is connected, the collector of PNP type triode Q2 and the other end of resistance R5, one end of resistance R6 and P
The grid of channel MOS tube Q1 is connected；The output end phase of the drain electrode and the IP phone power supply protection circuit of P-channel metal-oxide-semiconductor Q1
Even；The other end of resistance R3 is connected with the base stage of one end of resistance R4 and NPN type triode Q3；Another termination of resistance R4
The collector on ground, NPN type triode Q3 is connected with the other end of resistance R6, the emitter ground connection of NPN type triode Q3.
The burning voltage of the zener diode Z1 is more than the conducting voltage of the PNP type triode Q2.
The IP phone power supply protection circuit further includes capacitance C1, the both ends of capacitance C1 respectively with the both ends phase of resistance R5
Even.
After adopting the above scheme, the utility model controls PNP type triode by the stabilizing voltage characteristic of zener diode Z1
Q2 break-makes control the break-make of P-channel metal-oxide-semiconductor Q1 to be higher than the maximum functional of IP phone in the input voltage of power supply adaptor in turn
Cut off the power when voltage adapter to the power supply of IP phone to realize that over-voltage protecting function, the utility model also pass through resistance R3
The bleeder circuit constituted with resistance R4 come control the break-make of NPN type triode Q3 so that control the break-make of P-channel metal-oxide-semiconductor Q1 with
The input voltage of power supply adaptor cut off the power when being less than the minimum operating voltage of IP phone adapter to the power supply of IP phone from
And realize under-voltage protection function；Therefore the utility model can prevent from causing to damage to IP phone due to IP phone wrong plug adapter
It is bad, and the circuit structure of the utility model is simple, at low cost.
Description of the drawings
Fig. 1 is the circuit diagram of the utility model.
Specific implementation mode
In order to which the technical solution of the utility model is explained further, below by specific embodiment come to the utility model into
Row elaborates.
As shown in Figure 1, a kind of IP phone power supply protection circuit of the utility model, is used to control power supply adaptor to IP electricity
Talk about the voltage provided comprising resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, zener diode Z1, P ditch
Road metal-oxide-semiconductor Q1, PNP type triode Q2, NPN type triode Q3 and input terminal for being connected with power supply adaptor and for
The connected output end of the power end of IP phone.
Specifically, one end of the input terminal of one end of the resistance R1 and the IP phone power supply protection circuit, resistance R3,
The source electrode of the emitter of PNP type triode Q2, one end of resistance R5 and P-channel metal-oxide-semiconductor Q1 is connected, the other end of resistance R1 with
The cathode of zener diode Z1 and one end of resistance R2 are connected, the plus earth of zener diode Z1, the other end of resistance R2
It is connected with the base stage of PNP type triode Q2, one end of the collector of PNP type triode Q2 and the other end of resistance R5, resistance R6
And the grid of P-channel metal-oxide-semiconductor Q1 is connected；The output of the drain electrode and the IP phone power supply protection circuit of P-channel metal-oxide-semiconductor Q1
End is connected；The other end of resistance R3 is connected with the base stage of one end of resistance R4 and NPN type triode Q3；The other end of resistance R4
Ground connection, the collector of NPN type triode Q3 are connected with the other end of resistance R6, the emitter ground connection of NPN type triode Q3.Wherein
The burning voltage of the zener diode Z1 is more than the conducting voltage of the PNP type triode Q2, so that at zener diode Z1
When voltage stabilizing state, PNP type triode Q2 can be connected.
The utility model is when the input voltage of power supply adaptor is higher than the burning voltage of zener diode Z1, two pole of voltage stabilizing
Pipe Z1 is in the voltage stabilizing state of Zener breakdown, and the voltage at the both ends zener diode Z1 is the burning voltage of zener diode Z1,
The conducting of PNP type triode Q2 at this time, then the source electrode of P-channel metal-oxide-semiconductor Q1 and the voltage difference of grid are zero, P-channel metal-oxide-semiconductor Q1
Cut-off, the utility model does not export at this time, therefore the burning voltage of zener diode Z1 can be set as to the maximum of IP phone
Operating voltage, adapter pair of cutting off the power in this way when the input voltage of power supply adaptor is higher than the maximum working voltage of IP phone
The power supply of IP phone is to realize over-voltage protecting function.
The utility model is when the input voltage of power supply adaptor is less than the burning voltage of zener diode Z1, two pole of voltage stabilizing
Pipe Z1 reversely ends, PNP type triode Q2 cut-offs, if the input voltage of power supply adaptor is via resistance R3 and resistance R4 structures at this time
At bleeder circuit partial pressure after voltage be less than the conducting voltage of NPN type triode Q3 when, NPN type triode Q3 cut-off, P at this time
The source electrode of channel MOS tube Q1 and the voltage difference of grid are zero, and the Q1 cut-offs of P-channel metal-oxide-semiconductor, the utility model does not export at this time,
Therefore can according to the minimum operating voltage of corresponding IP phone and the conducting voltage of NPN type triode Q3 setting resistance R3 and
The resistance value ratio of resistance R4 ensures adaptation of cutting off the power when the input voltage of power supply adaptor is less than the minimum operating voltage of IP phone
Device realizes under-voltage protection function to the power supply of IP phone.
Further, make in IP phone to avoid IP telephone access power supply adaptor moment from generating prodigious surge current
The circuit in portion damages, and the IP phone power supply protection circuit further includes capacitance C1, and the both ends of capacitance C1 are respectively with resistance R5's
Both ends are connected, and such power supply adaptor is inserted into the moment of IP phone, due to the effect of capacitance C1, the grid of P-channel metal-oxide-semiconductor Q1 and
The voltage of source electrode is zero, with the charging of capacitance C1 so that the source voltage of P-channel metal-oxide-semiconductor Q1 is gradually increasing so that P-channel
Metal-oxide-semiconductor Q1 is slowly connected, to effectively reduce the surge current that power supply adaptor accesses moment.
To sum up, the utility model has the following advantages：
1, the utility model is controlled by the stabilizing voltage characteristic of zener diode Z1 by controlling PNP type triode Q2 break-makes
The break-make of P-channel metal-oxide-semiconductor Q1 in maximum working voltage of the input voltage of power supply adaptor higher than IP phone to cut off the power
Adapter realizes over-voltage protecting function to the power supply of IP phone, what the utility model was also made up of resistance R3 and resistance R4
Bleeder circuit controls the break-make of P-channel metal-oxide-semiconductor Q1 in the defeated of power supply adaptor in turn to control the break-make of NPN type triode Q3
Enter adapter of cutting off the power when voltage is less than the minimum operating voltage of IP phone to the power supply of IP phone to realize under-voltage protection
Function；Therefore the utility model can be prevented due to IP phone wrong plug adapter and the damage caused by IP phone.
2, the utility model delays the conducting of P-channel metal-oxide-semiconductor Q1 by capacitance C1, suitable to effectively reduce power supply
Orchestration accesses the surge current of moment.
3, the circuit structure of the utility model is simple, at low cost.
The product form and style of above-described embodiment and schema and non-limiting the utility model, any technical field
The appropriate changes or modifications that those of ordinary skill does it all should be regarded as the patent category for not departing from the utility model.
Claims (3)
1. a kind of IP phone power supply protection circuit, is used to control the voltage that power supply adaptor is provided to IP phone, feature exists
In：Including resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, zener diode Z1, P-channel metal-oxide-semiconductor Q1,
PNP type triode Q2, NPN type triode Q3 and input terminal for being connected with power supply adaptor and for the electricity with IP phone
The connected output end of source；
One end of the resistance R1 and the input terminal of the IP phone power supply protection circuit, one end of resistance R3, PNP type triode
The source electrode of the emitter of Q2, one end of resistance R5 and P-channel metal-oxide-semiconductor Q1 is connected, the other end and zener diode of resistance R1
The cathode of Z1 and one end of resistance R2 are connected, the plus earth of zener diode Z1, the other end and three pole of positive-negative-positive of resistance R2
The base stage of pipe Q2 is connected, the collector of PNP type triode Q2 and the other end of resistance R5, one end of resistance R6 and P-channel MOS
The grid of pipe Q1 is connected；The drain electrode of P-channel metal-oxide-semiconductor Q1 is connected with the output end of the IP phone power supply protection circuit；Resistance
The other end of R3 is connected with the base stage of one end of resistance R4 and NPN type triode Q3；The other end of resistance R4 is grounded, NPN type
The collector of triode Q3 is connected with the other end of resistance R6, the emitter ground connection of NPN type triode Q3.
2. IP phone power supply protection circuit as described in claim 1, it is characterised in that：The zener diode Z1's stablizes electricity
Conducting voltage of the pressure more than the PNP type triode Q2.
3. IP phone power supply protection circuit as claimed in claim 1 or 2, it is characterised in that：Further include capacitance C1, capacitance C1's
Both ends are connected with the both ends of resistance R5 respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721923545.5U CN207884273U8 (en) | 2017-09-22 | 2017-12-29 | A kind of IP phone power supply protection circuit |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721226757 | 2017-09-22 | ||
| CN2017212267578 | 2017-09-22 | ||
| CN201721923545.5U CN207884273U8 (en) | 2017-09-22 | 2017-12-29 | A kind of IP phone power supply protection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN207884273U true CN207884273U (en) | 2018-09-18 |
| CN207884273U8 CN207884273U8 (en) | 2019-01-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721923545.5U Active CN207884273U8 (en) | 2017-09-22 | 2017-12-29 | A kind of IP phone power supply protection circuit |
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| CN (1) | CN207884273U8 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110212488A (en) * | 2019-06-28 | 2019-09-06 | 上海鼎充新能源技术有限公司 | A kind of simple direct current anti-overvoltage circuit |
| CN110224373A (en) * | 2019-07-15 | 2019-09-10 | 合肥惠科金扬科技有限公司 | A kind of overvoltage crowbar and over-pressure safety device |
-
2017
- 2017-12-29 CN CN201721923545.5U patent/CN207884273U8/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110212488A (en) * | 2019-06-28 | 2019-09-06 | 上海鼎充新能源技术有限公司 | A kind of simple direct current anti-overvoltage circuit |
| CN110224373A (en) * | 2019-07-15 | 2019-09-10 | 合肥惠科金扬科技有限公司 | A kind of overvoltage crowbar and over-pressure safety device |
| CN110224373B (en) * | 2019-07-15 | 2021-09-28 | 重庆惠科金扬科技有限公司 | Overvoltage protection circuit and overvoltage protection device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN207884273U8 (en) | 2019-01-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CU01 | Correction of utility model | ||
| CU01 | Correction of utility model |
Correction item: National priority Correct: 201721226757.8 2017.09.22 CN Number: 38-01 Page: The title page Volume: 34 Correction item: National priority Correct: 201721226757.8 2017.09.22 CN Number: 38-01 Volume: 34 |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230625 Address after: Room 208-7, Hengye Building, No. 100 Xiangxing Road, Xiang'an Industrial Zone, Torch High tech Zone, Xiamen City, Fujian Province, 361101 Patentee after: Xiamen Yilian Communication Technology Co.,Ltd. Address before: 361009 unit 402-502, No.63, erwanghailu, software park, Xiamen City, Fujian Province Patentee before: YEALINK (XIAMEN) NETWORK TECHNOLOGY Co.,Ltd. |