CN205793164U

CN205793164U - ON-OFF control circuit and bluetooth earphone for bluetooth earphone

Info

Publication number: CN205793164U
Application number: CN201620490331.2U
Authority: CN
Inventors: 葛祥军
Original assignee: Beijing Pico Technology Co Ltd
Current assignee: Beijing Pico Technology Co Ltd
Priority date: 2016-05-26
Filing date: 2016-05-26
Publication date: 2016-12-07
Anticipated expiration: 2026-05-26

Abstract

The utility model discloses a kind of ON-OFF control circuit for bluetooth earphone and bluetooth earphone, this bluetooth earphone has controller, Bluetooth chip and battery, controller definition has switch control pin, ON-OFF control circuit includes the first switching device, this first switching device is connected to be provided in the first line of running voltage by battery, the control pole of the first switching device is connected with switch control pin, ON-OFF control circuit is arranged to the voltage signal according to first line output and forms the level signal inputting the power supply enable pin to Bluetooth chip, wherein, whether the magnitude of voltage of voltage signal turns on according to the first switching device changes, level signal carries out height according to the change of voltage signal, low level switching.This utility model circuit props up held controller and automatically controls, according to the use state of bluetooth earphone, the design whether Bluetooth chip works, and then realizes extending the purpose of stand-by time.

Description

ON-OFF control circuit and bluetooth earphone for bluetooth earphone

Technical field

This utility model relates to bluetooth earphone technical field, more specifically, this utility model relates to one For the ON-OFF control circuit of bluetooth earphone and be provided with the bluetooth earphone of this kind of ON-OFF control circuit.

Background technology

Conventional bluetooth earphone uses single chip architecture substantially, and its on-off control is real by mechanical switch Existing, particularly as follows: connect between power supply enable pin and the power output terminal of battery of Bluetooth chip Connect mechanical switch, and then allow users to be controlled by this mechanical switch the connecting and disconnecting of power supply, Realize the purpose of switch earphone.

But along with being continuously increased of bluetooth earphone function, single chip architecture can not meet design requirement, Need the controller increasing e.g. MCU e.g. to show, calendar scheduling processes.Due to bluetooth ear Machine is battery-powered, increases controller and energy consumption certainly will be caused to increase, and this will affect treating of bluetooth earphone The machine time, therefore, be highly desirable to for this kind of structure provide a kind of support according to bluetooth earphone make The ON-OFF control circuit of the design whether Bluetooth chip works is automatically controlled by state.

Utility model content

A purpose of the present utility model is to provide a kind of use state supported according to bluetooth earphone certainly The dynamic new technical scheme controlling the design whether Bluetooth chip works.

According to first aspect of the present utility model, it is provided that a kind of on-off control electricity for bluetooth earphone Road, described bluetooth earphone has controller, Bluetooth chip and battery, and an input of described controller is defeated Going out pin and be defined as switch control pin, described ON-OFF control circuit includes the first switching device, institute State the first switching device to be connected to be provided in the first line of running voltage by described battery, described first The control pole of switching device is connected with described switch control pin, and described ON-OFF control circuit is arranged to The voltage signal exported according to described first line forms the power supply enable of input extremely described Bluetooth chip and draws The level signal of foot, wherein, according to described first switching device whether the magnitude of voltage of described voltage signal Conducting changes, and described level signal carries out high and low level according to the change of described voltage signal Switching.

Optionally, described first switching device is N-channel MOS pipe, described first switching device Grid is connected with described switch control pin as described control pole；Described first switching device and first Resistant series is connected in described first line, and the grounded emitter of described first switching device；Institute State ON-OFF control circuit and be arranged by the colelctor electrode output described voltage letter of described first switching device Number.

Optionally, described ON-OFF control circuit also includes second switch device, described second switch device Part is the current collection that P links up metal-oxide-semiconductor, the grid of described second switch device and described first switching device Pole connects, and the emitter stage of described second switch device is applied in described running voltage, described second switch The colelctor electrode of device enables pin with described power supply and is connected, and described ON-OFF control circuit is arranged by Described voltage signal controls whether described second switch device turns on the described level signal of formation.

Optionally, the resistance of described first resistance be more than or equal to 0.5 megaohm, less than or etc. In 1.5 megaohms.

Optionally, described power supply enables pin via voltage-regulation resistance eutral grounding.

Optionally, the grid of described first switching device is also via the second resistance eutral grounding.

Optionally, the resistance of described second resistance be more than or equal to 0.5 megaohm, less than or etc. In 1.5 megaohms.

Optionally, described ON-OFF control circuit also includes second switch device, described second switch device Part is connected to be provided on the second circuit of running voltage by described battery, the control of described second switch device Pole processed receives described voltage signal, and it is defeated that described ON-OFF control circuit is arranged by described second circuit Go out described level signal.

According to this utility model second aspect, it is provided that a kind of bluetooth earphone, have and be arranged in housing Circuit board and the battery that is arranged in housing, described circuit board is provided with controller and Bluetooth chip, It is additionally provided with on described circuit board according to the ON-OFF control circuit described in this utility model first aspect.

One of the present utility model has the beneficial effects that, by arranging on-off control of the present utility model electricity Road, the level value that can realize being exported by the switch control pin of change controller is carried out Bluetooth chip and opens Close the design controlled, therefore, on the basis of this utility model ON-OFF control circuit, it is possible to realize control Device processed automatically controls, according to the use state of bluetooth earphone, the function whether Bluetooth chip works, and then obtains The effect of bluetooth earphone stand-by time must be extended.

Accompanying drawing explanation

Combined in the description and the accompanying drawing of the part that constitutes description shows this utility model Embodiment, and be used for explaining principle of the present utility model together with its explanation.

Fig. 1 is a kind of frame principle figure implementing structure according to this utility model ON-OFF control circuit；

Fig. 2 is the another kind of frame principle figure implementing structure according to this utility model ON-OFF control circuit；

Fig. 3 is the circuit theory diagrams of a kind of specific embodiment of ON-OFF control circuit shown in Fig. 2.

Description of reference numerals:

U1-controller；U2-Bluetooth chip；

KC-ON-OFF control circuit；Q1-the first switching device；

Q2-second switch device；R1-the first resistance；

R2-the second resistance；R3-voltage-regulation resistance；

P10-switch control pin；P20-power supply enables pin；

L1-first line；L2-the second circuit.

Detailed description of the invention

Various exemplary embodiment of the present utility model is described in detail now with reference to accompanying drawing.It should be noted that Arrive: unless specifically stated otherwise, the relative cloth of the parts illustrated the most in these embodiments and step Put, numerical expression and numerical value are not intended to scope of the present utility model.

Description only actually at least one exemplary embodiment is illustrative below, never makees For to this utility model and application thereof or any restriction of use.

May not beg in detail for technology, method and apparatus known to person of ordinary skill in the relevant Opinion, but in the appropriate case, described technology, method and apparatus should be considered a part for description.

Shown here with in all examples discussed, any occurrence should be construed as merely example Property rather than as limit.Therefore, other example of exemplary embodiment can have different Value.

It should also be noted that similar label and letter represent similar terms, therefore, one in following accompanying drawing A certain Xiang Yi the accompanying drawing of denier is defined, then need not it is carried out further in accompanying drawing subsequently Discuss.

Energy consumption is there is in this utility model for the bluetooth earphone solving to be provided with controller (such as MCU) Higher, and then cause the shorter problem of stand-by time, it is provided that a kind of held controller is according to bluetooth ear The use state of machine controls the ON-OFF control circuit of the design whether Bluetooth chip works, and specifically, is somebody's turn to do ON-OFF control circuit is by arranging at least one semiconductor switch device realizes whether working Bluetooth chip Automatically control, this semiconductor switch device e.g. transistor, metal-oxide-semiconductor etc., to this end, definition control One input and output pin (i.e. I/O pin) of device processed as switch control pin to ON-OFF control circuit Output switch control signal, to control the level letter of ON-OFF control circuit output by switch controlling signal Number level height, this level signal be export to Bluetooth chip power supply enable pin signal, Its low and high level should meet the requirement of Bluetooth chip, such as, meet Transistor-Transistor Logic level or CMOS level Requirement, and then when level signal is low level, controls Bluetooth chip and is in off working state, and When level signal is high level, control Bluetooth chip in running order.

Fig. 1 is a kind of frame principle figure implementing structure of this kind of ON-OFF control circuit.According to Fig. 1 institute Showing, this ON-OFF control circuit KC has the first switching device Q1, and this first switching device Q1 is connected to Thered is provided in first line L1 of running voltage VBAT by battery, the control pole of this first switching device Q1 It is connected with switch control pin P10, with exported via switch control pin P10 by controller U1 Switch controlling signal controls whether the first switching device Q1 turns on, and this ON-OFF control circuit is arranged to root Form, according to the voltage signal of first line L1 output, the power supply inputted to Bluetooth chip U2 and enable pin P20 Level signal, wherein, the magnitude of voltage of this voltage signal requires whether lead according to the first switching device Q1 Logical changing, the then change according to voltage signal of this level signal carries out the switching of high and low level, And then realize automatically controlling, by switch controlling signal, the purpose whether Bluetooth chip U2 works.

Above-mentioned first switching device Q1 can be that NPN transistor, PNP transistor, N link up MOS Pipe or P-channel metal-oxide-semiconductor etc., according to the concrete type selecting resistance of the first switching device Q1 and/ Or other switching devices can be formed and meet the level signal that Bluetooth chip U2 requires, wherein, select Metal-oxide-semiconductor advantageously reduces the power consumption of ON-OFF control circuit KC.

As a example by the first switching device Q1 links up metal-oxide-semiconductor for N, its grid is as controlling pole and switch Control pin P10 to connect；First switching device Q1 and the first resistance R1 (seeing Fig. 3) is connected in series In first line L1, and the grounded emitter of the first switching device Q1, the i.e. first resistance R1 connects Between colelctor electrode and the positive pole of battery of the first switching device Q1；ON-OFF control circuit KC is set For exporting above-mentioned voltage signal by the colelctor electrode of the first switching device Q1.So, draw at on-off control When the switch controlling signal of foot P10 output is high level, the first switching device Q1 will turn on, this voltage The magnitude of voltage of signal is the conducting voltage of the first switching device Q1；And export in switch control pin P10 Switch controlling signal when being low level, the first switching device Q1 will end, the voltage of this voltage signal Running voltage VBAT provided for battery is provided.

If the voltage signal of first line L1 output meets the level demand of Bluetooth chip U2, then may be used This voltage signal is enabled pin P20 directly as the input of above-mentioned level signal to power supply, if first The voltage signal of circuit L1 output is unsatisfactory for the level demand of Bluetooth chip U2, then can pass through dividing potential drop Resistance produces above-mentioned level signal, or produces above-mentioned level signal by connecting other switching device.

The square frame of the enforcement structure that Fig. 2 is two switching devices of employing of this kind of ON-OFF control circuit is former Reason figure.According to Fig. 2, this ON-OFF control circuit KC is except the first switching device Q1 in Fig. 1 Outward, also including second switch device Q2, this second switch device Q2 is connected to be provided work by battery On the second circuit L2 of voltage VBAT, the control pole of second switch device Q2 receives first line L1 The voltage signal of output, to control whether second switch device Q2 turns on by this voltage signal, switch Control circuit KC is arranged by this second circuit L2 output and meets the level that Bluetooth chip BT requires Signal, i.e. level signal by whether turning on carry out the switching of low and high level according to second switch device Q2.

Here, this second switch device Q2 and the first switching device Q1 can need to select according to design Identical switchtype or select different switchtypes.

For producing essentially identical level signal, two switching devices are used relatively to use a switch Device is obtained in that lower energy expenditure, particularly in the case of switching device uses metal-oxide-semiconductor.

Fig. 3 is based on the alternative specific embodiment of the one implementing structure shown in Fig. 2, real at this Executing in example, the first switching device Q1 uses N to link up metal-oxide-semiconductor, and second switch device Q2 uses P ditch Logical metal-oxide-semiconductor.

According to Fig. 3, the grid of the first switching device Q1 is as controlling pole and switch control pin P10 connects；First switching device Q1 and the first resistance R1 is connected in series in first line L1, and The grounded emitter of the first switching device Q1；ON-OFF control circuit KC is arranged by the first switch The colelctor electrode of device Q1 exports above-mentioned voltage signal.

The grid of second switch device Q2 and the colelctor electrode of the first switching device Q1 connect, with by above-mentioned Voltage signal is as controlling the control signal whether second switch device Q2 turns on, second switch device The emitter stage of Q2 is connected with the positive source of battery, i.e. provides to the emitter stage of second switch device Q2 Running voltage VBAT, the colelctor electrode of second switch device Q2 enables pin P20, on-off control with power supply Circuit KC is arranged by voltage signal and controls whether second switch device Q2 turns on formation voltage letter Number.

The operation principle of embodiment illustrated in fig. 3 is: when switch control pin P10 output high level makes the During one switching device Q1 conducting, it is applied to the pressure between grid and the emitter stage of second switch device Q2 Difference will less than its cut-in voltage (cut-in voltage is negative value), and then second switch device Q2 conducting, work Make voltage VBAT and act on the corresponding power enable within Bluetooth chip U2 via second switch device Q2 On the pull down resistor of pin P20, and then the level signal of generation high level, Bluetooth chip U2 now work Make.When switch control pin P10 output low level makes the first switching device Q1 cut-off, it is applied to the Pressure reduction between grid and the emitter stage of two switching device Q2 is equal to 0, more than its cut-in voltage, and then Second switch device Q2 ends, and it is right that running voltage VBAT cannot act on via second switch device Q2 Answer power supply to enable on the pull down resistor of pin P20, and then produce low level level signal, bluetooth core Sheet U2 does not works.

In order to reduce the power consumption of ON-OFF control circuit KC further, can select that resistance is bigger first Resistance R1, such as resistance are more than or equal to 0.5 megaohm, less than or equal to 1.5 megaohms, at this In embodiment, the resistance of the first resistance R1 is all chosen as 1 megaohm.

Owing to metal-oxide-semiconductor endophyte has electric capacity, therefore, if not having correspondence inside controller U1 The pull down resistor of switch control pin P10, then need between grid and the ground of the first switching device Q1 Connecting a resistance, the electric discharge transferred to during cut-off state by conducting state to form the first switching device Q1 is returned Road.

In order to enable the adaptive various controller U1 of this utility model ON-OFF control circuit KC, such as Fig. 3 Shown in, the grid of the first switching device Q1 can be set via the second resistance R2 ground connection, at least can Above-mentioned discharge loop is formed by this second resistance R2.

Also for reducing the power consumption of ON-OFF control circuit KC, can select that resistance is bigger second Resistance R2, such as resistance are more than or equal to 0.5 megaohm, less than or equal to 1.5 megaohms, at this In embodiment, the resistance of the second resistance R2 is all chosen as 1 megaohm.

In order to enable the Bluetooth chip of the adaptive various level demand of ON-OFF control circuit shown in Fig. 3, can The colelctor electrode of second switch device Q2 is set via voltage-regulation resistance R3 ground connection, to be closed by selection The voltage-regulation resistance R3 of suitable resistance meets Bluetooth chip U2 wanting the high and low level of level signal Ask.

This voltage-regulation resistance R3 can be such as slide rheostat.

It addition, this utility model ON-OFF control circuit can also use, and a P is linked up metal-oxide-semiconductor and Individual N-channel MOS pipe is connected in series in is provided the structure in the first line of running voltage by battery, right In this structure, the grid of two metal-oxide-semiconductors links together and receives opening of switch control pin P10 output Close control signal, and export above-mentioned voltage signal via the colelctor electrode of N-channel MOS pipe.Here, can According to the requirement of Bluetooth chip U2, this voltage signal is enabled as input to power supply the electricity of pin P20 Ordinary mail number, or make this voltage signal form this level signal, again through the dividing potential drop effect of divider resistance Or form final level signal etc. in conjunction with the second circuit L2 shown in Fig. 2 and Fig. 3.

This utility model additionally provides a kind of bluetooth earphone, its have the circuit board being arranged in housing and The battery being arranged in housing, except being provided with controller and the bluetooth of e.g. MCU on this circuit board Outside chip, it is additionally provided with above-mentioned ON-OFF control circuit KC, to realize controller according to bluetooth earphone Use state switchs the purpose of Bluetooth chip automatically, and then obtains the effect extending bluetooth earphone stand-by time Really.

The various embodiments described above primary focus describes and the difference of other embodiments, but art technology Personnel are it should be understood that, the various embodiments described above can be used alone as required or be combined with each other makes With.

Although specific embodiments more of the present utility model being described in detail by example, But it should be appreciated by those skilled in the art, example above is merely to illustrate rather than be Restriction scope of the present utility model.It should be appreciated by those skilled in the art, can be without departing from this reality In the case of novel scope and spirit, above example is modified.Model of the present utility model Enclose and be defined by the following claims.

Claims

1. for the ON-OFF control circuit of bluetooth earphone, described bluetooth earphone have controller (U1), Bluetooth chip (U2) and battery, it is characterised in that input and output of described controller (U1) are drawn Foot is defined as switch control pin (P10), and described ON-OFF control circuit (KC) includes the first switch Device (Q1), described first switching device (Q1) is connected to be provided running voltage (VBAT) by described battery First line (L1) on, the control pole of described first switching device (Q1) and described on-off control Pin (P10) connects, and described ON-OFF control circuit (KC) is arranged to according to described first line (L1) The voltage signal of output forms the power supply of input extremely described Bluetooth chip (U2) and enables pin (P20) Level signal, wherein, the magnitude of voltage of described voltage signal according to described first switching device (Q1) is No conducting changes, and described level signal carries out high and low level according to the change of described voltage signal Switching.

ON-OFF control circuit the most according to claim 1, it is characterised in that described first opens Closing device (Q1) is N-channel MOS pipe, and the grid of described first switching device (Q1) is as described Control pole to be connected with described switch control pin (P10)；Described first switching device (Q1) and first Resistance (R1) is connected in series in described first line (L1), and described first switching device (Q1) Grounded emitter；Described ON-OFF control circuit (KC) is arranged by described first switching device (Q1) colelctor electrode exports described voltage signal.

ON-OFF control circuit the most according to claim 2, it is characterised in that described switch control Circuit processed (KC) also includes that second switch device (Q2), described second switch device are that P links up MOS The colelctor electrode of pipe, the grid of described second switch device (Q2) and described first switching device (Q1) Connecting, the emitter stage of described second switch device (Q2) is applied in described running voltage (VBAT), The colelctor electrode of described second switch device (Q2) enables pin (P20) with described power supply and is connected, described ON-OFF control circuit (KC) is arranged by described voltage signal and controls described second switch device (Q2) Whether conducting forms described level signal.

ON-OFF control circuit the most according to claim 3, it is characterised in that described power supply makes Energy pin (P20) is via voltage-regulation resistance (R3) ground connection.

ON-OFF control circuit the most according to claim 2, it is characterised in that described first electricity The resistance of resistance (R1) is more than or equal to 0.5 megaohm, less than or equal to 1.5 megaohms.

6. according to the ON-OFF control circuit according to any one of claim 2 to 5, it is characterised in that The grid of described first switching device (Q1) is also via the second resistance (R2) ground connection.

ON-OFF control circuit the most according to claim 6, it is characterised in that described second electricity The resistance of resistance (R2) is more than or equal to 0.5 megaohm, less than or equal to 1.5 megaohms.

ON-OFF control circuit the most according to claim 1, it is characterised in that described switch control Circuit processed (KC) also includes second switch device (Q2), and described second switch device (Q2) connects On the second circuit that running voltage (VBAT) is provided by described battery, described second switch device (Q2) Control pole receive described voltage signal, described ON-OFF control circuit (KC) is arranged by described Second circuit (L2) exports described level signal.

9. a bluetooth earphone, has the circuit board being arranged in housing and the electricity being arranged in housing Pond, described circuit board is provided with controller (U1) and Bluetooth chip (U2), it is characterised in that The ON-OFF control circuit (KC) according to any one of claim 1 to 8 it is additionally provided with on described circuit board.