CN105872931B - Improved open machine examination slowdown monitoring circuit and system - Google Patents
Improved open machine examination slowdown monitoring circuit and system Download PDFInfo
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- CN105872931B CN105872931B CN201610225316.XA CN201610225316A CN105872931B CN 105872931 B CN105872931 B CN 105872931B CN 201610225316 A CN201610225316 A CN 201610225316A CN 105872931 B CN105872931 B CN 105872931B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R29/00—Monitoring arrangements; Testing arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
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- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Tests Of Electronic Circuits (AREA)
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Abstract
The present invention provides a kind of improved open machine examination slowdown monitoring circuit and system, wherein, improved open machine examination slowdown monitoring circuit includes chip and starting key, chip includes the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, starting-up signal detection circuit, power circuit and circuit system, first connecting pin of the first metal-oxide-semiconductor is connected with battery power supply interface, its second connection end is connected with detection node, and control terminal is connected with its first connecting pin；First connecting pin of the second metal-oxide-semiconductor is connected with external power charging interface, and second connection end is connected with detection node, and control terminal is connected with its first connecting pin.One end of starting key is connected with detection node, and other end ground connection, the input terminal of starting-up signal detection circuit is connected with detection node, and output end is connected with power circuit and circuit system.Compared with prior art, the booting detection circuit in the present invention can integrate in same chip, to reduce system cost, and save the area of printed circuit board.
Description
[technical field]
The present invention relates to boot-strap circuit field, in particular to a kind of improved open machine examination slowdown monitoring circuit and system.
[background technique]
Power button is required in the systems such as bluetooth headset, Baffle Box of Bluetooth to carry out activation system and close system, this system one
As there are two power inputs: battery supply and light source of charger.
It please refers to shown in Fig. 1, for a kind of circuit diagram of (key) detection circuit that is switched in the prior art, Fig. 1
Shown in booting detection circuit include two diodes D1, D2 being set to outside chip 100, starting key Key；It is integrated in chip
Pull down resistor Rp and PWR detection circuit (i.e. starting-up signal detection circuit) 110 in 100；The external power being connected with chip 100 fills
Electrical interface (or light source of charger end) VCHG and battery power supply interface (or battery supply end) VBAT.It is opened the following are shown in FIG. 1
The course of work of machine examination slowdown monitoring circuit.
When not pressing starting key Key (i.e. starting key Key disconnection), node B pulls down to ground potential by resistance Rp,
PWR detection circuit 110 detects low level, and system maintains current state, and (i.e. if being currently open state, system maintains booting
State；If being currently off-mode, system maintains off-mode).
When charger is inserted into external power charging interface VCHG, general light source of charger voltage high-tension battery supply voltage,
When i.e. charger is inserted into, the voltage of external power charging interface VCHG is higher than the voltage of battery power supply interface VBAT, and diode D2 is just
Reversely end to conducting, diode D1, the voltage of node A is equal to dispatch from foreign news agency by the voltage high of external power charging interface VCHG
The voltage of source charging interface VCHG.When starting key Key is pressed (i.e. starting key Key unlatching), PWR detection circuit 110
High level is detected, if system is in off-mode, if PWR detection circuit 110 detects that starting key Key is persistently pressed
Time be more than predetermined time (such as 3 seconds), then be judged as boot action, be then judged as boot action, activation system；If system
In open state, if PWR detection circuit 110 detects that the time that starting key Key is persistently pressed is more than the predetermined time
(such as 3 seconds) are then judged as that shutdown acts, close system.
When charger is not inserted into external power charging interface VCHG, the voltage of external power charging interface VCHG is zero, two poles
Pipe D1 forward conduction, diode D2 reversely end, and the voltage of node A is equal to by the voltage high of battery power supply interface VBAT
The voltage of battery power supply interface VBAT, when starting key Key is pressed, PWR detection circuit 110 also will test high level,
If system is in off-mode, if the time that PWR detection circuit 110 detects that starting key Key is persistently pressed is more than
Predetermined time (such as 3 seconds), then it is judged as boot action, activation system；If system is in off-mode, if PWR detection electricity
Road 110 detects that the time that starting key Key is persistently pressed is more than predetermined time (such as 3 seconds), then is judged as that shutdown acts,
Closing system.
Booting detection circuit shown in FIG. 1, the reason of needing to be arranged diode D1, D2, are, it is desirable in outer power source charges
When any one of interface VCHG and battery power supply interface VBAT have normal voltage, can activation system work, and diode D1, D2
Counter to be poured into another interface (power end) when can prevent any interface (or power end) from having electricity, anti-fill may cause electric leakage.
The shortcomings that implementation shown in FIG. 1 is, needed in system chip 100 it is external increase peripheral components D1,
D2 to increase system cost, and increases the area of printed circuit board, is unfavorable for portable system miniaturization.
Therefore, it is necessary to be improved to existing booting detection circuit and system.
[summary of the invention]
The purpose of the present invention is to provide a kind of improved open machine examination slowdown monitoring circuit and system, which can collect
At in same chip, to reduce system cost, and the area of printed circuit board is saved.
To solve the above-mentioned problems, according to an aspect of the present invention, the present invention provides a kind of improved open machine testing electricity
Road comprising chip and starting key, the chip include the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, starting-up signal detection circuit, power supply
Circuit and circuit system, wherein the first connecting pin of the first metal-oxide-semiconductor is connected with battery power supply interface, and the second of the first metal-oxide-semiconductor connects
It connects end to be connected with detection node, the control terminal of the first metal-oxide-semiconductor is connected with the first connecting pin of the first metal-oxide-semiconductor；The of second metal-oxide-semiconductor
One connecting pin is connected with external power charging interface, and the second connection end of the second metal-oxide-semiconductor is connected with the detection node, the 2nd MOS
The control terminal of pipe is connected with the first connecting pin of the second metal-oxide-semiconductor.One end of starting key is connected with the detection node, another
End ground connection, the input terminal of the starting-up signal detection circuit is connected with the detection node, output end and power circuit and is
Circuit of uniting is connected, and on/off state and system of the starting-up signal detection circuit based on the starting key detected are current
State exports corresponding control signal by its output end, with off/on power circuit and circuit system, or maintains power supply
The current state of circuit and circuit system.
Further, the chip further includes first resistor and second resistance, wherein first resistor is connected to battery power supply
Between interface and the first connecting pin of the first metal-oxide-semiconductor；Second resistance is connected to the first of external power charging interface and the second metal-oxide-semiconductor
Between connecting pin.
Further, when starting key is opened, the starting-up signal detection circuit detects that the detection node is low
Level, if system current state is open state, the output end of the starting-up signal detection circuit exports first control signal,
The first control signal closes power circuit and circuit system；When starting key is opened, the starting-up signal detection circuit inspection
Measure the detection node be low level, if system current state be off-mode, the starting-up signal detection circuit it is defeated
Outlet exports second control signal, the second control signal startup power supply circuit and circuit system；When starting key shutdown, institute
It states starting-up signal detection circuit and detects that the detection node is high level, then the starting-up signal detection circuit keeps output to work as
Preceding control signal, so that power circuit and circuit system maintain current state.
Further, the starting-up signal detection circuit further includes timing module, when the starting-up signal detection circuit is examined
Measure the detection node be low level when, the timing module starts timing, if the timing module record low voltage level
Duration be more than the predetermined time, and system current state be off-mode, then the output of the starting-up signal detection circuit
End output second control signal；If the duration of the low voltage level of timing module record is more than the predetermined time, and system
Current state is open state, then the output end of the starting-up signal detection circuit exports first control signal.
Further, first metal-oxide-semiconductor and the second metal-oxide-semiconductor are NMOS transistor, and the first of first metal-oxide-semiconductor connects
Connect the drain electrode, source electrode and grid that end, second connection end and control terminal are respectively the first metal-oxide-semiconductor, the liner body end of first metal-oxide-semiconductor
Ground connection；The first connecting pin, second connection end and the control terminal of second metal-oxide-semiconductor be respectively the drain electrode of the second metal-oxide-semiconductor, source electrode and
Grid, the liner body pipe ground connection of second metal-oxide-semiconductor.
Further, the starting-up signal detection circuit includes Schmidt trigger；Or the starting-up signal detection circuit
Including Schmidt trigger and logic circuit.
According to another aspect of the present invention, the present invention provides a kind of circuit system comprising booting detection circuit, it is described
Boot-strap circuit includes chip and starting key, the chip include the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, starting-up signal detection circuit,
Power circuit and circuit system, wherein the first connecting pin of the first metal-oxide-semiconductor is connected with battery power supply interface, and the of the first metal-oxide-semiconductor
Two connecting pins are connected with detection node, and the control terminal of the first metal-oxide-semiconductor is connected with the first connecting pin of the first metal-oxide-semiconductor；Second metal-oxide-semiconductor
The first connecting pin be connected with external power charging interface, the second connection end of the second metal-oxide-semiconductor is connected with the detection node, second
The control terminal of metal-oxide-semiconductor is connected with the first connecting pin of the second metal-oxide-semiconductor.One end of starting key is connected with the detection node,
Other end ground connection, the input terminal of the starting-up signal detection circuit are connected with the detection node, output end and power circuit
And circuit system is connected, on/off state and system of the starting-up signal detection circuit based on the starting key detected
Current state exports corresponding control signal by its output end, with off/on power circuit and circuit system, or maintains
The current state of power circuit and circuit system.
Further, the circuit system is bluetooth headset or Baffle Box of Bluetooth.
Compared with prior art, the booting detection circuit in the present invention can integrate in same chip, to reduce and be
System cost, and save the area of printed circuit board.
[Detailed description of the invention]
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill of field, without any creative labor, it can also be obtained according to these attached drawings other
Attached drawing.Wherein:
Fig. 1 is a kind of circuit diagram of detection circuit that is switched in the prior art；
Fig. 2 is the circuit diagram of the booting detection circuit of the present invention in one embodiment.
[specific embodiment]
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
" one embodiment " or " embodiment " referred to herein, which refers to, may be included at least one implementation of the invention
A particular feature, structure, or characteristic." in one embodiment " that different places occur in the present specification not refers both to same
A embodiment, nor the individual or selective embodiment mutually exclusive with other embodiments.Unless stated otherwise, herein
In connection, be connected, connect expression be electrically connected word indicate directly or indirectly to be electrical connected.
It please refers to shown in Fig. 2, for the circuit diagram of the booting detection circuit of the present invention in one embodiment.Fig. 2
Shown in booting detection circuit include chip 200 and starting key Key.The chip 200 includes first resistor R1, second resistance
R2, the first metal-oxide-semiconductor MN1, the second metal-oxide-semiconductor MN2, PWR detection circuit (i.e. starting-up signal detection circuit) 210 and are at power circuit
System circuit 220.
Wherein, one end of first resistor R1 is connected with battery power supply interface VBAT, the other end of first resistor R1 and first
The first connecting pin of metal-oxide-semiconductor MN1 is connected, and the second connection end of the first metal-oxide-semiconductor MN1 is connected with detection node PWR, the first metal-oxide-semiconductor
The control terminal of MN1 is connected with the first connecting pin of the first metal-oxide-semiconductor MN1, the liner body ground connection of the first metal-oxide-semiconductor MN1；Second resistance R2's
One end is connected with external power charging interface VCHG, the first connecting pin phase of the other end of second resistance R2 and the second metal-oxide-semiconductor MN2
Even, the second connection end of the second metal-oxide-semiconductor MN2 is connected with detection node PWR, the control terminal and the second metal-oxide-semiconductor of the second metal-oxide-semiconductor MN2
The first connecting pin of MN2 is connected, the liner body ground connection of the second metal-oxide-semiconductor MN2.In the embodiment illustrated in fig. 1, first metal-oxide-semiconductor
MN1 and the second metal-oxide-semiconductor MN2 is NMOS transistor, the first connecting pin, second connection end and the control of the first metal-oxide-semiconductor MN1
End is respectively drain electrode, source electrode and the grid of the first metal-oxide-semiconductor MN1；The first connecting pin of the second metal-oxide-semiconductor MN2, second connection end
It is respectively drain electrode, source electrode and the grid of the second metal-oxide-semiconductor MN2 with control terminal.
One end of starting key Key is connected with detection node PWR, other end ground connection.The PWR detection circuit 210
Input terminal is connected with detection node PWR, and output end is connected with power circuit and circuit system 220, the PWR detection circuit
210 on/off states and system current state based on the starting key Key detected, are answered by its output end output phase
Control signal, with off/on power circuit and circuit system 220, or maintain the current of power circuit and circuit system 220
State, the PWR detection circuit 210 generally comprise Schmidt trigger；Or Schmidt trigger and logic circuit.Specifically,
When starting key Key is opened, the PWR detection circuit 210 detects that detection node PWR is low level, if the current shape of system
State is open state, then the output end of the PWR detection circuit 210 exports first control signal, which closes
Power circuit and circuit system 220；When starting key Key is opened, the PWR detection circuit 210 detects detection node PWR
For low level, if system current state is off-mode, the second control of output end output of the PWR detection circuit 210 is believed
Number, the second control signal startup power supply circuit and circuit system 220；When starting key Key shutdown, the PWR detection electricity
Road 210 detects that detection node PWR is high level, then the PWR detection circuit 210 keeps exporting current control signal, with
Make power circuit and circuit system 220 that current state be maintained to make electricity that is, if current control signal is first control signal
Source circuit and circuit system 220 remain off state, so that system maintains off-mode, if current control signal is second
Signal is controlled, then power circuit and circuit system 220 is made to maintain starting state, so that system maintains open state.Wherein, described
First control signal and second control signal can be two kinds of logic states of a signal, for example, the first control signal
For low level, the second control signal is high level.
In the embodiment shown in Figure 2, the PWR detection circuit 210 further includes timing module (not shown), when described
When PWR detection circuit 210 detects that the detection node PWR is low level, the timing module starts timing, if the timing
The duration of the low voltage level of module record is more than the predetermined time, and system current state is open state, then the PWR inspection
The output end of slowdown monitoring circuit 210 exports first control signal；If the duration of the low voltage level of the timing module record is more than
Predetermined time, and system current state is off-mode, then the second control of output end output of the PWR detection circuit 210 is believed
Number.
To facilitate the understanding of the present invention, the course of work of booting detection circuit shown in Fig. 2 is introduced in detail below.
When not pressing starting key Key (i.e. starting key Key shutdown), and external power charging interface VCHG is inserted into charger
When (i.e. external power charging interface VCHG has electricity), (i.e. charger is inserted into general light source of charger voltage high-tension battery supply voltage
When, the voltage of external power charging interface VCHG is higher than the voltage of battery power supply interface VBAT), detection node PWR is by second resistance
R2 and the second metal-oxide-semiconductor MN2 be pulled upward to high potential (its voltage subtracts Vthn2 equal to the voltage of external power charging interface VCHG,
In, Vthn2 is the threshold voltage of the second metal-oxide-semiconductor MN2), PWR detection circuit 210 detects that detection node PWR is high level, institute
PWR detection circuit 210 is stated to keep exporting current control signal, so that power circuit and circuit system 220 maintain current state,
I.e. if current control signal is first control signal, power circuit and circuit system 220 is made to remain off state, so that
System maintains off-mode, if current control signal is second control signal, ties up power circuit and circuit system 220
Starting state is held, so that system maintains open state.
When not pressing starting key Key, and external power charging interface VCHG is not inserted into charger (i.e. external power charging interface
VCHG is without electricity), and when battery power supply interface VBAT has electricity, detection node PWR is pulled up by first resistor R2 and the first metal-oxide-semiconductor MN1
To high potential, (voltage of its voltage equal to battery power supply interface VBAT subtracts Vthn1, wherein Vthn1 is the first metal-oxide-semiconductor MN1
Threshold voltage), PWR detection circuit 210 detects that detection node PWR is high level, and the PWR detection circuit 210 keeps defeated
Current control signal out specifically refers to retouching for the last period so that power circuit and circuit system 220 maintain current state
It states, details are not described herein.
When pressing starting key Key (i.e. starting key Key unlatching), detection node PWR pulled down to ground level, PWR
Detection circuit 210 detects that detection node PWR is low level and the low level duration is more than predetermined time (i.e. starting key
The duration that Key is pressed is more than the predetermined time, for example, 3 seconds), if system current state is open state, it is judged as pass
Motor-driven work, then the output end of the PWR detection circuit 210 exports first control signal, which closes power supply electricity
Road and circuit system 220, so that system be made to enter off-mode；When pressing starting key Key (i.e. starting key Key unlatching)
When, detection node PWR pulled down to ground level, and PWR detection circuit 210 detects that detection node PWR is low level and the low electricity
The flat duration is more than predetermined time (i.e. the duration that starting key Key is pressed is more than the predetermined time, for example, 3 seconds), if
System current state is off-mode, then is judged as boot action, then the output end output second of the PWR detection circuit 210
Signal, the second control signal startup power supply circuit and circuit system 220 are controlled, so that system be made to enter open state.
Wherein, the connection type of the first metal-oxide-semiconductor MN1 can prevent battery power supply interface VBAT without electricity and external power charging
When mouth VCHG has electricity, on from the anti-sink current of external power charging interface VCHG to battery power supply interface VBAT；The connection of second metal-oxide-semiconductor
When mode can prevent battery power supply interface VBAT from having electric and external power charging interface VCHG without electricity, from battery power supply interface VBAT
In anti-sink current to external power charging interface VCHG.There are two functions by first resistor R1: one, pressing when detection node PWR is switched on
When key Key is drawn to ground level, the electric current that battery power supply interface VBAT flows to ground level by the first metal-oxide-semiconductor MN1 can be limited, is adopted
With biggish resistance, it can also can reduce and power from battery to avoid the first metal-oxide-semiconductor MN1 is more than its current limit and is damaged
The electric current of interface VBAT consumption, saves power consumption；Two, first resistor R1 plays the antistatic protection to the first metal-oxide-semiconductor MN1, avoids
When electrostatic occurs in battery power supply interface VBAT, the first metal-oxide-semiconductor MN1 is damaged.Second resistance R2 is similar with the function of first resistor R1,
Second resistance R2 can limit the electric current that ground level is flowed to from external power charging interface VCHG, save power consumption, and protect the 2nd MOS
Pipe MN2 plays electrostatic protection function to the second metal-oxide-semiconductor MN2 to avoid its overcurrent.
Booting detection circuit in the present invention is particularly suitable in the systems such as bluetooth headset, Baffle Box of Bluetooth.
In conclusion the booting detection circuit in the present invention includes first resistor R1, second resistance R2, the first metal-oxide-semiconductor
MN1, the second metal-oxide-semiconductor MN2, PWR detection circuit 210, power circuit and circuit system 220 and starting key Key.Due to the first electricity
Hinder R1, second resistance R2, the first metal-oxide-semiconductor MN1, the second metal-oxide-semiconductor MN2, PWR detection circuit 210, power circuit and circuit system
220 can integrate in chip 200, and therefore, booting detection circuit of the invention can reduce system cost, and save printing electricity
The area of road plate.
In the present invention, the word that the expressions such as " connection ", connected, " company ", " connecing " are electrical connected, unless otherwise instructed, then
Indicate direct or indirect electric connection.
It should be pointed out that any change that one skilled in the art does a specific embodiment of the invention
All without departing from the range of claims of the present invention.Correspondingly, the scope of the claims of the invention is also not merely limited to
In previous embodiment.
Claims (7)
1. a kind of improved open machine examination slowdown monitoring circuit, which is characterized in that it includes chip and starting key,
The chip includes the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, starting-up signal detection circuit, power circuit and circuit system, wherein
First connecting pin of the first metal-oxide-semiconductor is connected with battery power supply interface, and the second connection end of the first metal-oxide-semiconductor is connected with detection node,
The control terminal of first metal-oxide-semiconductor is connected with the first connecting pin of the first metal-oxide-semiconductor；The first connecting pin and the external power of second metal-oxide-semiconductor fill
Electrical interface is connected, and the second connection end of the second metal-oxide-semiconductor is connected with the detection node, the control terminal of the second metal-oxide-semiconductor and the 2nd MOS
First connecting pin of pipe is connected,
One end of starting key is connected with the detection node, other end ground connection,
The input terminal of the starting-up signal detection circuit is connected with the detection node, output end and power circuit and system electricity
Road is connected, on/off state and system current state of the starting-up signal detection circuit based on the starting key detected,
Export corresponding control signal by its output end, with off/on power circuit and circuit system, or maintain power circuit and
The current state of circuit system,
When starting key is opened, the starting-up signal detection circuit detects that the detection node is low level, if system is worked as
Preceding state is open state, then the output end of the starting-up signal detection circuit exports first control signal, the first control letter
Number closing power circuit and circuit system；
When starting key is opened, the starting-up signal detection circuit detects that the detection node is low level, if system is worked as
Preceding state is off-mode, then the output end of the starting-up signal detection circuit exports second control signal, the second control letter
Number startup power supply circuit and circuit system；
When starting key shutdown, the starting-up signal detection circuit detects that the detection node is high level, then described to open
Machine signal deteching circuit keeps exporting current control signal, so that power circuit and circuit system maintain current state.
2. booting detection circuit according to claim 1, which is characterized in that the chip further includes first resistor and second
Resistance,
Wherein, first resistor is connected between battery power supply interface and the first connecting pin of the first metal-oxide-semiconductor；Second resistance is connected to
Between external power charging interface and the first connecting pin of the second metal-oxide-semiconductor.
3. booting detection circuit according to claim 1, which is characterized in that the starting-up signal detection circuit further includes meter
When module, when the starting-up signal detection circuit detect the detection node be low level when, the timing module starts to count
When, if the duration of the low voltage level of timing module record is more than the predetermined time, and system current state is shutdown shape
State, then the output end of the starting-up signal detection circuit exports second control signal；If the low tension of the timing module record
The flat duration is more than the predetermined time, and system current state is open state, then the starting-up signal detection circuit is defeated
Outlet exports first control signal.
4. booting detection circuit according to claim 1, which is characterized in that
First metal-oxide-semiconductor and the second metal-oxide-semiconductor are NMOS transistor,
The first connecting pin, second connection end and the control terminal of first metal-oxide-semiconductor be respectively the drain electrode of the first metal-oxide-semiconductor, source electrode and
Grid, the liner body end ground connection of first metal-oxide-semiconductor；The first connecting pin, second connection end and the control terminal of second metal-oxide-semiconductor point
Not Wei the second metal-oxide-semiconductor drain electrode, source electrode and grid, second metal-oxide-semiconductor liner body pipe ground connection.
5. booting detection circuit according to claim 4, which is characterized in that
The starting-up signal detection circuit includes Schmidt trigger；Or
The starting-up signal detection circuit includes Schmidt trigger and logic circuit.
6. a kind of circuit system, which is characterized in that it includes booting detection circuit a method as claimed in any one of claims 1 to 5.
7. circuit system according to claim 6, which is characterized in that the circuit system is bluetooth headset or bluetooth sound
Case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610225316.XA CN105872931B (en) | 2016-04-11 | 2016-04-11 | Improved open machine examination slowdown monitoring circuit and system |
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|---|---|---|---|
| CN201610225316.XA CN105872931B (en) | 2016-04-11 | 2016-04-11 | Improved open machine examination slowdown monitoring circuit and system |
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| CN105872931B true CN105872931B (en) | 2019-03-01 |
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| CN109450045B (en) * | 2018-12-21 | 2024-05-17 | 厦门奇力微电子有限公司 | Multi-battery management protection chip and multi-battery management protection system |
| CN115598494A (en) * | 2022-09-08 | 2023-01-13 | 环胜电子（深圳）有限公司（Cn） | Startup state maintaining module |
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| CN102005734A (en) * | 2010-10-20 | 2011-04-06 | 无锡中星微电子有限公司 | Battery protection integrated circuit and system |
| CN202083915U (en) * | 2011-02-28 | 2011-12-21 | 广州视源电子科技有限公司 | Button switch control circuit with zero standby power consumption |
| CN202218208U (en) * | 2011-10-14 | 2012-05-09 | 成都锐奕信息技术有限公司 | Starting-up and shutting-down circuit adopting two metal oxide semiconductor (MOS) tubes |
| CN203537358U (en) * | 2013-10-31 | 2014-04-09 | 河南东陆高科实业有限公司 | One-key switching circuit |
| CN104202029A (en) * | 2014-08-29 | 2014-12-10 | 青岛歌尔声学科技有限公司 | Single-button power-on and power-off circuit and head-wearing display device |
| CN205334124U (en) * | 2016-01-28 | 2016-06-22 | 武汉梦芯科技有限公司 | One -key switching circuit |
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|---|---|
| CN105872931A (en) | 2016-08-17 |
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