CN107612534A - On-off circuit and terminal device - Google Patents
On-off circuit and terminal device Download PDFInfo
- Publication number
- CN107612534A CN107612534A CN201710843146.6A CN201710843146A CN107612534A CN 107612534 A CN107612534 A CN 107612534A CN 201710843146 A CN201710843146 A CN 201710843146A CN 107612534 A CN107612534 A CN 107612534A
- Authority
- CN
- China
- Prior art keywords
- fet
- circuit
- connects
- filter capacitor
- 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
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/567—Circuits characterised by the use of more than one type of semiconductor device, e.g. BIMOS, composite devices such as IGBT
Landscapes
- Electronic Switches (AREA)
Abstract
Present invention is disclosed a kind of on-off circuit and terminal device, the on-off circuit includes power input, power output end, Enable Pin, FET, triode and bleeder circuit, the source electrode of the FET connects power path by the power input, and drain electrode passes through power output end connection load；The base stage of the triode connects the control pin of master control by the Enable Pin, and colelctor electrode connects the source electrode and grid of the FET, grounded emitter by the bleeder circuit.The on-off circuit of the embodiment of the present invention, circuit structure is simple, and cost is relatively low, and can realize separation control, cost-effective, improves flexibility and practicality.
Description
Technical field
The present invention relates to electronic technology field, especially relates to a kind of on-off circuit and terminal device.
Background technology
The reasonable control of power supply, plays a key effect to system power dissipation and life of product.At present, electricity is controlled in terminal device
The on-off circuit of road path, mainly by the way of integrated chip, but this mode cost is higher, and belongs to centralized Control,
Flexibility is poor.
Therefore, the cost of on-off circuit how is reduced, improves flexibility, is the current technical problem for being badly in need of solving.
The content of the invention
The main object of the present invention is a kind of on-off circuit of offer and terminal device, it is intended to the cost of on-off circuit is reduced,
Improve flexibility.
To achieve these objectives, the embodiment of the present invention proposes a kind of on-off circuit, the on-off circuit include power input,
Power output end, Enable Pin, FET, triode and bleeder circuit, the source electrode of the FET are defeated by the power supply
Enter end connection power path, drain electrode passes through power output end connection load；The base stage of the triode passes through described enabled
The control pin of end connection master control, colelctor electrode connect the source electrode and grid of the FET, emitter stage by the bleeder circuit
Ground connection.
Alternatively, the on-off circuit also includes the first filter capacitor, and described first filter capacitor one end connects the field
The source electrode of effect pipe, other end ground connection.
Alternatively, the on-off circuit also includes the second filter capacitor, and described second filter capacitor one end connects the field
The drain electrode of effect pipe, other end ground connection.
Alternatively, the on-off circuit also includes the first filter capacitor and the second filter capacitor, first filter capacitor
One end connects the source electrode of the FET, other end ground connection；Described second filter capacitor one end connects the FET
Drain electrode, other end ground connection.
Alternatively, the bleeder circuit includes first resistor and second resistance, and described first resistor one end connects the field
The source electrode of effect pipe, the other end connect the grid of the FET；Described second resistance one end connects the collection of the triode
Electrode, the other end connect one end that the first resistor connects the grid of the FET.
Alternatively, the bleeder circuit includes first resistor and second resistance, and described first resistor one end connects the field
The source electrode of effect pipe, the other end connect the grid of the FET；Described second resistance one end connects the collection of the triode
Electrode, the other end connect one end that the first resistor connects the grid of the FET；And first filter capacitor connects
The tie point for connecing the FET is connected the source electrode of the FET between the power input with the first resistor
Tie point between.
It is alternatively, described that to control pin be GPIO pin.
Alternatively, the FET is P-channel field-effect transistor (PEFT) pipe.
Alternatively, the triode is NPN triode.
The embodiment of the present invention proposes a kind of terminal device simultaneously, and the terminal device includes on-off circuit, the switch electricity
Road includes power input, power output end, Enable Pin, FET, triode and bleeder circuit, the source of the FET
Pole connects power path by the power input, and drain electrode passes through power output end connection load；The triode
Base stage connects the control pin of master control by the Enable Pin, and colelctor electrode connects the source of the FET by the bleeder circuit
Pole and grid, grounded emitter.
A kind of on-off circuit that the embodiment of the present invention is provided, formed using FET and triode, circuit structure letter
Single, cost is relatively low, and can realize separation control, cost-effective, improves flexibility and practicality.
Brief description of the drawings
Fig. 1 is the circuit connection diagram of the on-off circuit first embodiment of the present invention；
Fig. 2 is the circuit connection diagram of the on-off circuit second embodiment of the present invention.
The realization, functional characteristics and advantage of the object of the invention will be described further referring to the drawings in conjunction with the embodiments.
Embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not construed as limiting the claims.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singulative " one " used herein, " one
It is individual ", " described " and "the" may also comprise plural form.It is to be further understood that what is used in the specification of the present invention arranges
Diction " comprising " refer to the feature, integer, step, operation, element and/or component be present, but it is not excluded that in the presence of or addition
One or more other features, integer, step, operation, element, component and/or their groups.It should be understood that when we claim member
Part is " connected " or during " coupled " to another element, and it can be directly connected or coupled to other elements, or there may also be
Intermediary element.In addition, " connection " used herein or " coupling " can include wireless connection or wireless coupling.It is used herein to arrange
Taking leave "and/or" includes whole or any cell and all combinations of one or more associated list items.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technology art
Language and scientific terminology), there is the general understanding identical meaning with the those of ordinary skill in art of the present invention.Should also
Understand, those terms defined in such as general dictionary, it should be understood that have with the context of prior art
The consistent meaning of meaning, and unless by specific definitions as here, idealization or the implication of overly formal otherwise will not be used
To explain.
Those skilled in the art of the present technique are appreciated that " terminal " used herein above, " terminal device " both include wireless communication
The equipment of number receiver, it only possesses the equipment of the wireless signal receiver of non-emissive ability, includes receiving again and transmitting hardware
Equipment, its have on bidirectional communication link, can perform two-way communication reception and launch hardware equipment.This equipment
It can include：Honeycomb or other communication equipments, it has single line display or multi-line display or shown without multi-line
The honeycomb of device or other communication equipments；PCS (Personal Communications Service, PCS Personal Communications System), it can
With combine voice, data processing, fax and/or its communication ability；PDA (Personal Digital Assistant, it is personal
Digital assistants), it can include radio frequency receiver, pager, the Internet/intranet access, web browser, notepad, day
Go through and/or GPS (Global Positioning System, global positioning system) receiver；Conventional laptop and/or palm
Type computer or other equipment, its have and/or the conventional laptop including radio frequency receiver and/or palmtop computer or its
His equipment." terminal " used herein above, " terminal device " they can be portable, can transport, installed in the vehicles (aviation,
Sea-freight and/or land) in, or be suitable for and/or be configured in local runtime, and/or with distribution form, operate in the earth
And/or any other position operation in space." terminal " used herein above, " terminal device " can also be communication terminal, on
Network termination, music/video playback terminal, such as can be PDA, MID (Mobile Internet Device, mobile Internet
Equipment) and/or mobile phone or the equipment such as intelligent television, set top box with music/video playing function.
Reference picture 1, proposes the on-off circuit first embodiment of the present invention, and the on-off circuit includes power input
POWER_IN, power output end POWER_OUT, Enable Pin EN, FET (Metal Oxide Semiconductor, MOS)
Q02, triode Q01 and bleeder circuit.FET Q02 source S by power input POWER_IN connection power paths,
Drain D is loaded by power output end POWER_OUT connections；The control that triode Q01 base stage B passes through Enable Pin EN connection master controls
Pin processed, colelctor electrode C connect FET Q02 source S and grid G, emitter E ground connection GND by bleeder circuit.
In the embodiment of the present invention, bleeder circuit includes first resistor R01 and second resistance R02.First resistor R01 one end connects
Connect FET Q02 source S, other end connection FET Q02 grid G；Second resistance R02 one end connecting triode
Q01 colelctor electrode C, one end of other end connection first resistor R01 connection FETs Q02 grid G.
In the embodiment of the present invention, the preferred P-channel field-effect transistor (PEFT) pipe of FET (positive channel Metal Oxide
Semiconductor, PMOS) so that the supply voltage passed through is bigger, expand the scope of application.Triode is preferably the poles of NPN tri-
Pipe, i.e., the triode being made up of 2 pieces of N-type semiconductor sandwich, 1 piece of P-type semiconductor so that circuit structure is simpler, drop
Low cost.The control pin of master control is preferably universal input/output (General Purpose Input Output, GPIO) pin,
That is the GPIO pin that triode Q01 base stage B passes through Enable Pin EN connection master controls.
The operation principle of the on-off circuit of the embodiment of the present invention is as follows：
The power path for needing to be independently controlled is accessed into power input POWER_IN, load connection power output end
The GPIO pin (can have the switching of low and high level two states) of POWER_OUT, Enable Pin EN connection master control；
When Enable Pin EN inputs are low level, it is added in triode Q01 base stage B and the voltage of emitter E is less than base stage
Saturation voltage drop Vbe (sat), is insufficient to allow Q01 to open between emitter stage, i.e. the colelctor electrode C of triode and generating pole E are in and opened
Line state, so that cut-in voltage Vgs (th) of the terminal voltage at first resistor R01 both ends less than FET Q02 is absolute
Value, is unsatisfactory for FET Q02 opening condition, and power supply can not be supplied to load (rear class equipment), realize the pass of power path
Close；
Conversely, when Enable Pin EN inputs are high level, it is added in triode Q01 base stage B and the voltage of emitter E is more than
Vbe (sat), triode Q01 are turned on, and there is voltage drop at first resistor R01 both ends at once, as long as ensureing first resistor R01 and the
Two resistance R02 resistance distribution it is proper, allow first resistor R01 voltage drop more than FET Q02 Vgs (th) it is absolute
Value, you can open FET Q02 so that power supply can pass through FET Q02 supply loads (rear class equipment), realize
The unlatching of power path.
The embodiment of the present invention constitutes a kind of simple and flexibly real by using a FET and a triode
Power switch circuit.
Further, as shown in Fig. 2 in the on-off circuit second embodiment of the present invention, the on-off circuit also includes the
One filter capacitor C01 and the second filter capacitor C02.First filter capacitor C01 one end connection FET Q01 source S, it is another
End ground connection GND；Second filter capacitor C02 one end connection FET Q02 drain D, other end ground connection GND.Preferably, this
In inventive embodiments, the first filter capacitor C01 connection FETs Q02 tie point is between power input POWER_IN and
Between the tie point of one resistance R01 connection FETs Q02 source S.
The on-off circuit of the embodiment of the present invention is by adding filter capacitor so that voltage is more stable, reduces ripple, carries
The high stability of power supply.
In other embodiments, the first filter capacitor C01 or the second filter capacitor C02 can also be only added, equally can be with
Play the effect of certain burning voltage.
The on-off circuit of the embodiment of the present invention, formed using FET and triode, circuit structure is simple, cost compared with
It is low, and separation control can be realized, it is cost-effective, improve flexibility and practicality.
The present invention proposes a kind of terminal device simultaneously, and the terminal device includes on-off circuit, and the on-off circuit includes power supply
Input, power output end, Enable Pin, FET, triode and bleeder circuit, the source electrode of FET pass through power input
End connection power path, drain electrode are connected by power output end and loaded；The base stage of triode connects the control of master control by Enable Pin
Pin processed, colelctor electrode connect the source electrode and grid of FET, grounded emitter by bleeder circuit.Described in the present embodiment
On-off circuit is the on-off circuit involved by above-described embodiment in the present invention, be will not be repeated here.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the scope of the invention, every utilization
The equivalent structure or equivalent flow conversion that description of the invention and accompanying drawing content are made, or directly or indirectly it is used in other correlations
Technical field, be included within the scope of the present invention.
Claims (10)
1. a kind of on-off circuit, it is characterised in that including power input, power output end, Enable Pin, FET, three poles
Pipe and bleeder circuit, the source electrode of the FET connect power path by the power input, and drain electrode passes through the electricity
Source output terminal connection load；The base stage of the triode connects the control pin of master control by the Enable Pin, and colelctor electrode passes through institute
State source electrode and grid that bleeder circuit connects the FET, grounded emitter.
2. on-off circuit according to claim 1, it is characterised in that the on-off circuit also includes the first filter capacitor,
Described first filter capacitor one end connects the source electrode of the FET, other end ground connection.
3. on-off circuit according to claim 1, it is characterised in that the on-off circuit also includes the second filter capacitor,
Described second filter capacitor one end connects the drain electrode of the FET, other end ground connection.
4. on-off circuit according to claim 1, it is characterised in that the on-off circuit also include the first filter capacitor and
Second filter capacitor, described first filter capacitor one end connect the source electrode of the FET, other end ground connection；Second filter
Ripple electric capacity one end connects the drain electrode of the FET, other end ground connection.
5. according to the on-off circuit described in claim any one of 1-4, it is characterised in that the bleeder circuit includes first resistor
And second resistance, described first resistor one end connect the source electrode of the FET, the other end connects the grid of the FET
Pole；Described second resistance one end connects the colelctor electrode of the triode, and the other end connects the first resistor and connects the field effect
Should pipe grid one end.
6. the on-off circuit according to claim 2 or 4, it is characterised in that the bleeder circuit includes first resistor and the
Two resistance, described first resistor one end connect the source electrode of the FET, and the other end connects the grid of the FET；Institute
The colelctor electrode that second resistance one end connects the triode is stated, the other end connects the first resistor and connects the FET
One end of grid；And first filter capacitor connect the tie point of the FET between the power input with it is described
First resistor is connected between the tie point of the source electrode of the FET.
7. according to the on-off circuit described in claim any one of 1-4, it is characterised in that described to control pin be GPIO pin.
8. according to the on-off circuit described in claim any one of 1-4, it is characterised in that the FET is imitated for P-channel field
Ying Guan.
9. according to the on-off circuit described in claim any one of 1-4, it is characterised in that the triode is NPN triode.
10. a kind of terminal device, it is characterised in that including the on-off circuit as described in claim any one of 1-9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710843146.6A CN107612534A (en) | 2017-09-18 | 2017-09-18 | On-off circuit and terminal device |
| PCT/CN2017/111402 WO2019051994A1 (en) | 2017-09-18 | 2017-11-16 | Switch circuit and terminal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710843146.6A CN107612534A (en) | 2017-09-18 | 2017-09-18 | On-off circuit and terminal device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107612534A true CN107612534A (en) | 2018-01-19 |
Family
ID=61061001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710843146.6A Pending CN107612534A (en) | 2017-09-18 | 2017-09-18 | On-off circuit and terminal device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107612534A (en) |
| WO (1) | WO2019051994A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109901689A (en) * | 2019-01-29 | 2019-06-18 | 珠海市杰理科技股份有限公司 | Hardware switch circuit |
| CN111048036A (en) * | 2018-10-15 | 2020-04-21 | 青岛海信电器股份有限公司 | OLED display device |
| WO2020077976A1 (en) * | 2018-10-15 | 2020-04-23 | 青岛海信电器股份有限公司 | Oled display device, oled television, and power supplying method therefor |
| CN111223462A (en) * | 2020-02-21 | 2020-06-02 | 湖北亿咖通科技有限公司 | Liquid crystal display screen drive circuit |
| CN112737085A (en) * | 2019-10-14 | 2021-04-30 | 海信视像科技股份有限公司 | Display device |
| CN113529349A (en) * | 2021-07-30 | 2021-10-22 | 珠海格力电器股份有限公司 | Washing machine, control method and control device of washing machine and washing system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101425797A (en) * | 2007-11-01 | 2009-05-06 | 深圳迈瑞生物医疗电子股份有限公司 | Slow opening fast shutting electronic switch circuit and control method thereof |
| CN202145638U (en) * | 2011-08-12 | 2012-02-15 | 赵恩海 | High voltage simulation switch circuit |
| CN103178816A (en) * | 2011-12-26 | 2013-06-26 | 海洋王照明科技股份有限公司 | Single-key switch control circuit and lighting |
| CN204013456U (en) * | 2014-08-08 | 2014-12-10 | 台达电子电源(东莞)有限公司 | Switching circuit |
| CN204928783U (en) * | 2015-07-30 | 2015-12-30 | 成都亿盟恒信科技有限公司 | Switch control circuit |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2824469Y (en) * | 2005-09-26 | 2006-10-04 | 海信集团有限公司 | Television with power consumption control circuit |
| JP5446529B2 (en) * | 2009-07-14 | 2014-03-19 | 株式会社リコー | Low pass filter circuit, constant voltage circuit using the low pass filter circuit, and semiconductor device |
| CN202455260U (en) * | 2011-12-08 | 2012-09-26 | 深圳市同洲电子股份有限公司 | Power supply circuit compatible with 5V and 3.3V voltage and electronic equipment |
| CN203850832U (en) * | 2014-05-12 | 2014-09-24 | 深圳恒隆电子有限公司 | Anti-reversal connection and low-power shutdown circuit for MID (Mobile Internet Device) battery |
| CN203951594U (en) * | 2014-05-16 | 2014-11-19 | 成都三零凯天通信实业有限公司 | A kind of Set Top Box of supporting Anti-surging and switching on and shutting down protection |
-
2017
- 2017-09-18 CN CN201710843146.6A patent/CN107612534A/en active Pending
- 2017-11-16 WO PCT/CN2017/111402 patent/WO2019051994A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101425797A (en) * | 2007-11-01 | 2009-05-06 | 深圳迈瑞生物医疗电子股份有限公司 | Slow opening fast shutting electronic switch circuit and control method thereof |
| CN202145638U (en) * | 2011-08-12 | 2012-02-15 | 赵恩海 | High voltage simulation switch circuit |
| CN103178816A (en) * | 2011-12-26 | 2013-06-26 | 海洋王照明科技股份有限公司 | Single-key switch control circuit and lighting |
| CN204013456U (en) * | 2014-08-08 | 2014-12-10 | 台达电子电源(东莞)有限公司 | Switching circuit |
| CN204928783U (en) * | 2015-07-30 | 2015-12-30 | 成都亿盟恒信科技有限公司 | Switch control circuit |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111048036A (en) * | 2018-10-15 | 2020-04-21 | 青岛海信电器股份有限公司 | OLED display device |
| WO2020077976A1 (en) * | 2018-10-15 | 2020-04-23 | 青岛海信电器股份有限公司 | Oled display device, oled television, and power supplying method therefor |
| CN109901689A (en) * | 2019-01-29 | 2019-06-18 | 珠海市杰理科技股份有限公司 | Hardware switch circuit |
| CN109901689B (en) * | 2019-01-29 | 2021-10-12 | 珠海市杰理科技股份有限公司 | Hardware switch circuit |
| CN112737085A (en) * | 2019-10-14 | 2021-04-30 | 海信视像科技股份有限公司 | Display device |
| CN112737085B (en) * | 2019-10-14 | 2023-10-27 | 海信视像科技股份有限公司 | display device |
| CN111223462A (en) * | 2020-02-21 | 2020-06-02 | 湖北亿咖通科技有限公司 | Liquid crystal display screen drive circuit |
| CN113529349A (en) * | 2021-07-30 | 2021-10-22 | 珠海格力电器股份有限公司 | Washing machine, control method and control device of washing machine and washing system |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019051994A1 (en) | 2019-03-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107612534A (en) | On-off circuit and terminal device | |
| KR101320468B1 (en) | An apparatus, a wireless device and a method for cascode amplifier with protection circuitry | |
| US6686772B2 (en) | Voltage mode differential driver and method | |
| US7876157B1 (en) | Power amplifier bias circuit having controllable current profile | |
| CN111522389A (en) | Wide-input low-dropout linear voltage stabilizing circuit | |
| US7804357B2 (en) | Distributed amplifier | |
| JPH0983264A (en) | Amplifier circuit and semiconductor integrated circuit device for portable telephone system | |
| CN211878488U (en) | Wide-input low-dropout linear voltage stabilizing circuit | |
| US6005439A (en) | Unity gain signal amplifier | |
| CN113672016A (en) | Power supply suppression circuit, chip and communication terminal | |
| US20200228070A1 (en) | Active Wilkinson Combiner | |
| US8324966B2 (en) | Apparatus and methods for electronic amplification | |
| EP4220953A1 (en) | Driving amplifier stage with low output impedance | |
| US7868601B1 (en) | System and method for controlling a regulator circuit for radio frequency power amplifier biases | |
| KR101616597B1 (en) | High frequency switch | |
| CN216981894U (en) | Switch circuit, multichannel sampling control circuit, analog-to-digital conversion circuit and chip | |
| CN106656056B (en) | Dynamic current source circuit, chip and communication terminal for operational amplifier | |
| US6683505B2 (en) | High speed voltage controlled oscillator | |
| US7161395B2 (en) | Static frequency divider with low power supply | |
| US20150002209A1 (en) | Circuits for semiconductor device leakage cancellation | |
| Lian et al. | A dual-band LNA with 0.18-μm CMOS switches | |
| US6333673B2 (en) | Electronic circuit | |
| US20030058045A1 (en) | Power control in RF amplifiers | |
| Chen et al. | A 10-GHz bias modulated class-E power amplifier in 90-nm CMOS | |
| US11949388B2 (en) | Power amplifier and power amplifying method |
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: 20180119 |
|
| RJ01 | Rejection of invention patent application after publication |