CN109861176A - Electric power management circuit and system - Google Patents
Electric power management circuit and system Download PDFInfo
- Publication number
- CN109861176A CN109861176A CN201811567215.6A CN201811567215A CN109861176A CN 109861176 A CN109861176 A CN 109861176A CN 201811567215 A CN201811567215 A CN 201811567215A CN 109861176 A CN109861176 A CN 109861176A
- Authority
- CN
- China
- Prior art keywords
- circuit
- output end
- voltage
- connect
- input
- 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.)
- Granted
Links
Landscapes
- Protection Of Static Devices (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The present invention provides a kind of electric power management circuit and electronic equipment, is related to protection of field of circuit technology.In the electric power management circuit, the input terminal of reverse-connection preventing circuit is connect with power output end, and output end is connect with the first input end of the first input end of overvoltage crowbar, the input terminal of under-voltage protecting circuit and switching circuit respectively；The output end of overvoltage crowbar and the second input terminal of switching circuit connect；The output end of switching circuit is connect with device to be powered；The output end of under-voltage protecting circuit is connect with the first input end of the voltage input end of detection circuit, control chip respectively；The signal input part of detection circuit is for inputting physical signal；The output end of detection circuit is connect with the second input terminal of control chip；The third input terminal of the output end and switching circuit that control chip connects.The range that the present invention solves the output voltage of the output end of power supply is uncontrollable, and the problem of lack throw load defencive function.
Description
Technical field
The present invention relates to protection field of circuit technology, in particular to a kind of electric power management circuit and system.
Background technique
Present electronic equipment, especially in the electronic equipment that function is complicated, number of chips is more, power supply and electronics are set
Electric power management circuit between standby device to be powered is essential circuit.
In the prior art, electric power management circuit generally includes reverse-connection preventing circuit, under-voltage protecting circuit and overvoltage crowbar.
The power output end of electronic equipment is connect with device to be powered by electric power management circuit, treats power supply device and be powered.But
It is that in existing electric power management circuit, the range of the output voltage of electric power management circuit output end is fixed, it is difficult to adapt to more at present
The electronic equipment market of change.
Summary of the invention
It is an object of the present invention in view of the deficiency of the prior art, a kind of electric power management circuit and system are provided,
Range to solve the problem of the output voltage of the output end of power supply is uncontrollable and lacks throw load defencive function.
To achieve the above object, technical solution used in the embodiment of the present invention is as follows:
In a first aspect, including: reverse-connection preventing circuit, overvoltage protection electricity the embodiment of the invention provides a kind of electric power management circuit
Road, under-voltage protecting circuit, switching circuit, detection circuit and control chip circuit；
The input terminal of reverse-connection preventing circuit is connect with power output end, and the output end of reverse-connection preventing circuit is electric with overvoltage protection respectively
First input end, the input terminal of under-voltage protecting circuit on road are connected with the first input end of switching circuit；
The output end of overvoltage crowbar and the second input terminal of switching circuit connect；The output end of switching circuit with wait supply
Electrical part connection；
First input end of the output end of under-voltage protecting circuit respectively with the voltage input end of detection circuit, control chip connects
It connects；
The signal input part of detection circuit is used to control the switch of detection circuit for inputting physical signal, physical signal；
The output end of detection circuit is connect with the second input terminal of control chip；Control the output end and switching circuit of chip
Third input terminal connection；
The output voltage that chip is used for the output end based on under-voltage protecting circuit is controlled, according to the output end of detection circuit
Output signal, the output voltage of the output end of the switch and switching circuit of control switch circuit, and then control electric power management circuit
Switch and electric power management circuit treat the supply voltage of power supply device.
Optionally, electric power management circuit further include: normal power supply circuit；
The input terminal of normal power supply circuit and the output end of reverse-connection preventing circuit connect, the first output end and mistake of normal power supply circuit
The first input end of voltage protection circuit connects, and the second output terminal of normal power supply circuit and the input terminal of under-voltage protecting circuit connect,
The third output end of normal power supply circuit and the first input end of switching circuit connect.
Optionally, overvoltage crowbar includes first comparator, first resistor and second resistance；
One end of first resistor is connect with the first output end of normal power supply circuit, and the other end of first resistor is compared with first
The positive input of device connects, and the negative input of first comparator and one end of second resistance connect, second resistance it is another
End ground connection, the output end of first comparator and the second input terminal of switching circuit connect.
Optionally, switching circuit includes the first triode, the second triode, third transistor and the first metal-oxide-
Semiconductor field effect transistor metal-oxide-semiconductor；
The base stage of first triode is connect with the second output terminal of control chip, the collector of the first triode and the two or three
The base stage of pole pipe connects, the emitter ground connection of the first triode；The collector of second triode respectively with overvoltage crowbar
Output end, normal power supply circuit third output end connected with the base stage of third transistor, the emitter of the second triode ground connection；The
The collector of three triodes is connect with the grid of the first metal-oxide-semiconductor, the emitter ground connection of third transistor；The drain electrode of first metal-oxide-semiconductor
It is connect with the output end of reverse-connection preventing circuit, the source electrode of the first metal-oxide-semiconductor is connect with device to be powered.
Optionally, reverse-connection preventing circuit includes the second metal-oxide-semiconductor, first diode and the second diode；
First diode is connected with the second diode by the cathode of first diode and the cathode of the second diode, and first
The anode of diode is connect with the drain electrode of the second metal-oxide-semiconductor, the grounded-grid of the anode and the second metal-oxide-semiconductor of the second diode, and second
The source electrode of metal-oxide-semiconductor is connect with power output end, the second metal-oxide-semiconductor drain electrode also respectively with the first input end of overvoltage crowbar,
The input terminal of under-voltage protecting circuit is connected with the first input end of switching circuit.
Optionally, under-voltage protecting circuit includes the second comparator, 3rd resistor and the 4th resistance；
One end of 3rd resistor is connect with the second output terminal of normal power supply circuit, and the other end of 3rd resistor is compared with second
The positive input of device connects；One end of 4th resistance is grounded, and the other end of the 4th resistance and the negative sense of the second comparator input
End connection；The output end of comparator is connect with the first input end of the voltage input end of detection circuit and control chip respectively.
Optionally, detection circuit includes the 5th resistance, the 6th resistance, third diode and the 4th triode；
The base stage of 4th triode is connected by the 5th resistance and third diode and the signal input part of detection circuit, the
The collector of four triodes is connect with the second input terminal of the output end of under-voltage protecting circuit and control chip respectively, the four or three pole
The emitter of pipe is grounded.
Optionally, the first metal-oxide-semiconductor and the second metal-oxide-semiconductor are the metal-oxide-semiconductor of enhanced P-channel.
Optionally, the 7th electricity is serially connected between first comparator and the positive input and output end of the second comparator respectively
Resistance and the 8th resistance；
7th resistance and the 8th resistance are respectively used to carry out positive feedback adjusting to first comparator and the second comparator.
Second aspect, the embodiment of the invention also provides a kind of electronic equipment, including power management described in first aspect
Circuit, power supply and device to be powered；
Electric power management circuit is serially connected between power output end and power supply device.
In the embodiment of the present invention, electric power management circuit include: reverse-connection preventing circuit, overvoltage crowbar, under-voltage protecting circuit,
Switching circuit, detection circuit and control chip circuit；The input terminal of reverse-connection preventing circuit is connect with power output end, reverse-connection preventing circuit
Output end it is defeated with the first of the first input end of overvoltage crowbar, the input terminal of under-voltage protecting circuit and switching circuit respectively
Enter end connection, reverse-connection preventing circuit reduces electric power management circuit due to reversal connection, causes voltage excessive, and then causes power management electric
A possibility that path loss bad phenomenon occurs；The output end of overvoltage crowbar and the second input terminal of switching circuit connect, and over-voltage is protected
A possibility that protection circuit reduces device to be powered, occurs due to the excessively high caused device failure phenomenon to be powered of line voltage distribution；
The output end of switching circuit is connect with device to be powered, the switch of the switch control electric power management circuit of switching circuit, and then is controlled
Whether power supply processed gives device to be powered to power；The output end of under-voltage protecting circuit respectively with the voltage input end of detection circuit, control
The first input end of coremaking piece connects, and under-voltage protecting circuit reduces device to be powered, due to line voltage distribution it is too low caused by
The power supply device service life detracts a possibility that phenomenon occurs；The signal input part of detection circuit is for inputting physical signal, detection electricity
The output end on road is connect with the second input terminal of control chip, and physical signal is used to control the switch of detection circuit, detection circuit
The switch of detection circuit can be controlled according to externally input physical signal, to pass through control chip controls electric power management circuit
Switch；The third input terminal of the output end and switching circuit that control chip connects；Chip is controlled to be used for based on under-voltage protection electricity
The output voltage of the output end on road, according to the output signal of the output end of detection circuit, the switch and switch of control switch circuit
The output voltage of the output end of circuit, and then the switch of control electric power management circuit and electric power management circuit treat power supply device
Supply voltage.Chip is controlled according to the voltage rating of device to be powered, controls the resistance value of each resistance in electric power management circuit
Size, and then the voltage range of overvoltage crowbar and under-voltage protecting circuit is controlled, it further reduces because of voltage rating not
Together, the generation of different electric power management circuit phenomenons is needed, is got ready for the generalization of electronic equipment.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is a kind of schematic diagram of electric power management circuit provided in an embodiment of the present invention；
Fig. 2 is the schematic diagram of another electric power management circuit provided in an embodiment of the present invention；
Fig. 3 is a kind of schematic diagram of overvoltage crowbar provided in an embodiment of the present invention；
Fig. 4 is a kind of schematic diagram of switching circuit provided in an embodiment of the present invention；
Fig. 5 is a kind of schematic diagram of reverse-connection preventing circuit provided in an embodiment of the present invention；
Fig. 6 is a kind of schematic diagram of under-voltage protecting circuit provided in an embodiment of the present invention；
Fig. 7 is a kind of schematic diagram of detection circuit provided in an embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.
Fig. 1 is a kind of schematic diagram of electric power management circuit provided in an embodiment of the present invention, as shown in Figure 1, the power management
Circuit includes: reverse-connection preventing circuit, overvoltage crowbar, under-voltage protecting circuit, switching circuit, detection circuit and control chip electricity
Road.
Wherein, the input terminal of reverse-connection preventing circuit is connect with power output end, the output end of reverse-connection preventing circuit respectively with over-voltage
First input end, the input terminal of under-voltage protecting circuit of protection circuit are connected with the first input end of switching circuit.Overvoltage protection
The output end of circuit and the second input terminal of switching circuit connect.The output end of switching circuit is connect with device to be powered.It is under-voltage
The output end of circuit is protected to connect respectively with the first input end of the voltage input end of detection circuit, control chip.Detection circuit
Signal input part for inputting physical signal, physical signal is used to control the switch of detection circuit；The output end of detection circuit
It is connect with the second input terminal of control chip.The third input terminal of the output end and switching circuit that control chip connects.Control core
Piece is used for the output voltage of the output end based on under-voltage protecting circuit, according to the output signal of the output end of detection circuit, control
The output voltage of the output end of the switch and switching circuit of switching circuit, and then control the switch and power supply pipe of electric power management circuit
Reason circuit treats the supply voltage of power supply device.
Since physical signal can control the switch of detection circuit, and then it is defeated to switching circuit to control control chip output
Output signal out, switching circuit can control the switch of electric power management circuit according to the output signal and electric power management circuit is treated
The supply voltage of power supply device, the different voltage ratings with power supply device are different, it is possible to according to the volume with power supply device
Constant voltage adjusts the range of the output voltage of electric power management circuit by control chip, reduces because voltage rating is different, needs
Otherwise the generation of same electric power management circuit phenomenon is got ready for the generalization of electronic equipment.
Wherein, reverse-connection preventing circuit is used to provide the function such as anti-reverse protection, surge protection, power amplification for power input
Energy.
Overvoltage crowbar can make power supply disconnect or make power supply pipe for by when line voltage distribution is more than scheduled maximum value
Manage a kind of protection circuit that the output voltage of circuit reduces.In the present embodiment, overvoltage crowbar is for reducing output voltage.When
So, in practical applications, when line voltage distribution is considerably beyond the voltage rating of device to be powered, for example, when line voltage distribution is wait supply
At 100 times or more of the voltage rating of electrical part, overvoltage crowbar control switch circuit, line disconnection voltage can be passed through.
Under-voltage protecting circuit can export 3.3V voltage or cutting electricity for when the too low influence instrument work of line voltage distribution
The circuit in source, when under-voltage protecting circuit exports 3.3V voltage, under-voltage protecting circuit is used to detection circuit power supply.
Switching circuit can control the switch of electric power management circuit.
Control chip can be used for the output according to detection circuit, control the switch of electric power management circuit, and control core
Piece can control the output voltage of electric power management circuit according to the voltage rating of device to be powered, to adapt to different voltage ratings
Device to be powered power supply.
In the embodiment of the present invention, electric power management circuit include: reverse-connection preventing circuit, overvoltage crowbar, under-voltage protecting circuit,
Switching circuit, detection circuit and control chip circuit；The input terminal of reverse-connection preventing circuit is connect with power output end, reverse-connection preventing circuit
Output end it is defeated with the first of the first input end of overvoltage crowbar, the input terminal of under-voltage protecting circuit and switching circuit respectively
Enter end connection, reverse-connection preventing circuit reduces electric power management circuit due to reversal connection, causes voltage excessive, and then causes power management electric
A possibility that path loss bad phenomenon occurs；The output end of overvoltage crowbar and the second input terminal of switching circuit connect, and over-voltage is protected
A possibility that protection circuit reduces device to be powered, occurs due to the excessively high caused device failure phenomenon to be powered of line voltage distribution；
The output end of switching circuit is connect with device to be powered, the switch of the switch control electric power management circuit of switching circuit, and then is controlled
Whether power supply processed gives device to be powered to power；The output end of under-voltage protecting circuit respectively with the voltage input end of detection circuit, control
The first input end of coremaking piece connects, and under-voltage protecting circuit reduces device to be powered, due to line voltage distribution it is too low caused by
The power supply device service life detracts a possibility that phenomenon occurs；The signal input part of detection circuit is for inputting physical signal, detection electricity
The output end on road is connect with the second input terminal of control chip, and physical signal is used to control the switch of detection circuit, detection circuit
The switch of detection circuit can be controlled according to externally input physical signal, to pass through control chip controls electric power management circuit
Switch；The third input terminal of the output end and switching circuit that control chip connects；Chip is controlled to be used for based on under-voltage protection electricity
The output voltage of the output end on road, according to the output signal of the output end of detection circuit, the switch and switch of control switch circuit
The output voltage of the output end of circuit, and then the switch of control electric power management circuit and electric power management circuit treat power supply device
Supply voltage.Chip is controlled according to the voltage rating of device to be powered, controls the resistance value of each resistance in electric power management circuit
Size, and then the voltage range of overvoltage crowbar and under-voltage protecting circuit is controlled, it further reduces because of voltage rating not
Together, the generation of different electric power management circuit phenomenons is needed, is got ready for the generalization of electronic equipment.
As shown in Fig. 2, optionally, electric power management circuit further include: normal power supply circuit.
The input terminal of normal power supply circuit and the output end of reverse-connection preventing circuit connect, the first output end and mistake of normal power supply circuit
The first input end of voltage protection circuit connects, and the second output terminal of normal power supply circuit and the input terminal of under-voltage protecting circuit connect,
The third output end of normal power supply circuit and the first input end of switching circuit connect.
Resistance, diode, capacitor and the linear voltage regulator of normal power supply circuit can respectively be self-regulated, different to be powered to adapt to
Device needs different supply voltages.In addition, often power supply circuit can also include the effect of carrying out surge protection and power absorption, it can be with
Realize stable voltage input electric power management circuit.
Wherein, normal power supply circuit may include: the 9th resistance, the tenth resistance, eleventh resistor, twelfth resistor, the 4th
Diode, first capacitor, the second capacitor, linear voltage regulator, thirteenth resistor, the 14th resistance, third capacitor and the 4th capacitor,
9th resistance and the tenth resistance series connection, later again with eleventh resistor and the concatenated circuit in parallel of twelfth resistor, the four or two pole
Pipe is connected between the 9th resistance and the tenth resistance and eleventh resistor and twelfth resistor, one end of first capacitor and the tenth electricity
Resistance connected with one end of twelfth resistor, the other end of first capacitor is connect with one end of the second capacitor, the second capacitor it is another
End is connect with the input port of linear voltage regulator and enable port, the output port of linear voltage regulator and one end of thirteenth resistor
Connection, the other end of thirteenth resistor and the dialog box port of linear voltage regulator connect, one end and the 13rd of the 14th resistance
One end of resistance connects, the other end ground connection of the 14th resistance, and one end of third capacitor and the 4th capacitor is connected to linearly
The other end of the output end of voltage-stablizer, third capacitor and the 4th capacitor is grounded respectively.
9th resistance, the tenth resistance, eleventh resistor, twelfth resistor and the 4th diode can form carrying out surge protection and
Power absorption circuit.
Surging protection circuit is to occur exceeding the peak value of stationary value, including surge voltage and surge current to moment, is carried out
It is instantaneous to reduce, to reach the circuit of protection circuit effect.
Power absorption circuit can improve electronic device and turn on and off voltage, the current waveform that the moment is born.
The first capacitor and the second capacitor being serially connected in normal power supply circuit can play the role of stable input voltage.
Linear voltage regulator can be voltage-releasing voltage stabilizer, protect the circuit from the damage of too high voltages.
Third capacitor and the 4th capacitor may be implemented to stablize the effect of output 3.3V voltage.
Normal power supply circuit make the output voltage by reverse-connection preventing circuit protection circuit against input over-voltage, under-voltage protecting circuit and
Switching circuit is maintained at before in relatively stable range, further ensures the protection that electric power management circuit treats power supply device
Effect.
As shown in figure 3, optionally, overvoltage crowbar includes first comparator, first resistor and second resistance；First electricity
One end of resistance is connect with the first output end of normal power supply circuit, the other end of first resistor and the electrode input end of first comparator
Connection, the negative input of first comparator and one end of second resistance connect, and the other end ground connection of second resistance, first compares
The output end of device and the second input terminal of switching circuit connect.
Overvoltage is generated since many reasons may cause line voltage distribution, such as the shutdown of switching device, the conjunction of power switch
Break.Due to the presence of the parasitic inductance in circuit, current break caused by a variety of causes will generate due to voltage spikes, to make
At overvoltage, overvoltage crowbar can reduce device to be powered because of device damage to be powered caused by electric power output voltage is excessively high
The generation of bad phenomenon is broken when overvoltage crowbar detects that electric power output voltage is much larger than the voltage rating of device to be powered
Open circuit or by line voltage distribution be rapidly decreased to less than or equal to device to be powered voltage rating voltage, reduce due to
The generation of device failure phenomenon to be powered caused by output voltage is excessively high.Wherein, two or more data item are compared, with
Determine whether they are equal, or determines size relation between them and put in order and be known as comparing.It can be realized this comparison
The circuit or device of function are known as comparator.Comparator is the electricity that an analog voltage signal compares with a reference voltage
Road.
Two input terminals that first resistor and second resistance are serially connected in first comparator respectively can eliminate bigoted electric current pair
The influence of overvoltage crowbar.
As shown in figure 4, optionally, switching circuit includes the first triode, the second triode, third transistor and the first gold medal
Category-Oxide-Semiconductor Field effect crystal metal-oxide-semiconductor；The base stage of first triode is connect with the second output terminal of control chip, the
The collector of one triode is connect with the base stage of the second triode, the emitter ground connection of the first triode；The collection of second triode
Electrode is connect with the base stage of the output end of overvoltage crowbar, the third output end of normal power supply circuit and third transistor respectively,
The emitter of second triode is grounded；The collector of third transistor is connect with the grid of the first metal-oxide-semiconductor, the hair of third transistor
Emitter grounding；The drain electrode of first metal-oxide-semiconductor and the output end of reverse-connection preventing circuit connect, the source electrode of the first metal-oxide-semiconductor and device to be powered
Connection.
When line voltage distribution is much larger than the voltage rating of device to be powered, overvoltage crowbar is opened, control chip input
The signal of switching circuit, when being high voltage and low-voltage, switching circuit can control electric power management circuit always and be in closing shape
State；When line voltage distribution is in the range of nominal tension of device to be powered, overvoltage crowbar is closed, and controls chip input switch
When circuit is high voltage signal, switching circuit control electric power management circuit is in the open state, controls chip input switching circuit
When for low-voltage, switching circuit control electric power management circuit is in closed state.
Triode is a kind of semiconductor devices for controlling electric current, small-signal can be zoomed into the biggish telecommunications of range value
Number.
Metal-oxide-semiconductor input impedance is high, noise is low, thermal stability is good, and manufacturing process is simple, radiation is strong, can be used for
Amplifying circuit or switching circuit etc..
Wherein, when controlling chip and being used to export the output signal to switching circuit as high voltage signal, the first triode
It opens, so that the second triode of control is closed, and then is controlled third diode and opened, so switching circuit is opened；When control core
Piece be used for export to switching circuit output signal be low voltage signal when, the first triode close, thus control the two or three pole
Pipe is opened, and then is controlled third diode and closed, so switching circuit is closed.
Switching circuit controls the input of external voltage, and switching circuit is opened, then external voltage can input device to be powered,
Switching circuit is closed, then external voltage cannot input device to be powered.
As shown in figure 5, optionally, reverse-connection preventing circuit includes the second metal-oxide-semiconductor, first diode and the second diode；First
The cathode connection of diode and the second diode by the cathode and the second diode of first diode, the anode of first diode
Connect with the drain electrode of the second metal-oxide-semiconductor, anode and the grounded-grid of the second metal-oxide-semiconductor of the second diode, the source electrode of the second metal-oxide-semiconductor with
Power output end connection, the drain electrode of the second metal-oxide-semiconductor also respectively with the first input end of overvoltage crowbar, under-voltage protecting circuit
Input terminal is connected with the first input end of switching circuit.
Due to being likely to occur the electric power management circuit situation reversed in power output end, so as to cause power management electric
Path loss is bad, further may cause device failure to be powered, it is possible to connect reverse-connection preventing circuit in power output end, work as connection
When the electric power management circuit of power output end is reversed, in the first diode of reverse-connection preventing circuit and the effect of the second diode
Under, it ensure that the voltage for inputting device to be powered is forward voltage, reduce the device to be powered as caused by input backward voltage
The generation of part damage phenomenon.
Wherein, diode allows electric current by single direction by (forward bias voltage drop), blocks (reverse bias) when reversed.
Two cathode diodes interconnected can form the bi-directional voltage stabilizing diode of positive and negative characteristics symmetric, in power supply pipe
Circuit is managed when being reversely connected on power supply, reversed voltage can be converted to positive connection.
As shown in fig. 6, optionally, under-voltage protecting circuit includes the second comparator, 3rd resistor and the 4th resistance；Third electricity
One end of resistance is connect with the second output terminal of normal power supply circuit, and the other end of 3rd resistor and the anode of comparator connect；4th
One end of resistance is grounded, and the other end of the 4th resistance and the cathode of comparator connect；The output end of comparator is electric with detection respectively
The voltage input end on road is connected with the first input end of control chip.
When the output voltage of electric power management circuit is too low, too low voltage may result in device to be powered cannot be steady
Normal use can reduce the service life of device to be powered for a long time, it is possible to before voltage input device to be powered, carry out
Under-voltage protection exports 3.3V voltage when line voltage distribution is too low, without reducing too low voltage input device to be powered
The generation for the phenomenon that service life of the device to be powered as caused by line voltage distribution is reduced.
Wherein, comparator and two resistance are separately connected, and the effect of under-voltage protection may be implemented, in addition, two electricity of adjustment
The resistance value of resistance, the protection voltage range of adjustable under-voltage protection.When the voltage rating of device to be powered is more than or less than now
The protection voltage of under-voltage protecting circuit in some electric power management circuits, then adjust the resistance value of resistance, is allowed to adapt to device to be powered
The voltage rating of part.
It should be noted that 3rd resistor and the resistance value of the 4th resistance can be true by the voltage rating of device to be powered
It is fixed.
As shown in fig. 7, optionally, detection circuit includes the 5th resistance, the 6th resistance, third diode and the four or three pole
Pipe；The base stage of 4th triode is connected by the 5th resistance and third diode and the signal input part of detection circuit, and the four or three
The collector of pole pipe is connect with the second input terminal of the output end of under-voltage protecting circuit and control chip respectively, the 4th triode
Emitter ground connection.
Due to the switch of electric power management circuit, being turned on or off to control for external physical signal is needed, it is possible to
By the way that detection circuit is arranged, physical signal is converted into electric signal, electric signal passes through control chip controls power circuit in turn
Switch.
Wherein, the input physical signal of detection circuit can be key switch signal, when key switch is placed in unlatching, object
It manages signal control detection circuit to open, and then passes through the unlatching of control chip controls power circuit；When key switch is placed in closing
When, physical signal controls detection circuit and closes, and then passes through the closing of control chip controls power circuit.
Optionally, the first metal-oxide-semiconductor and the second metal-oxide-semiconductor are the metal-oxide-semiconductor of enhanced P-channel.
It is the simple process of the metal-oxide-semiconductor of enhanced P-channel, cheap, and threshold voltage is high, and operating voltage is also higher,
It is suitble to the power supply of large size instrument.
Wherein, the metal-oxide-semiconductor grid voltage of enhanced P-channel is far below source voltage, and gate source voltage is reverse bias.Separately
Outside, the electric current of the metal-oxide-semiconductor of enhanced P-channel can be flowed to from source electrode and be drained.
Optionally, the 7th electricity is serially connected between first comparator and the electrode input end and output end of the second comparator respectively
Resistance and the 8th resistance；7th resistance and the 8th resistance are respectively used to carry out positive feedback tune to first comparator and the second comparator
Section.
Due to played together with first comparator overvoltage protection first resistor and second resistance and with the second comparator
The adjustable range of the 3rd resistor and the 4th resistance that play under-voltage protection together is limited, cannot function well as and adjust over-voltage and owe
The range of pressure, it is possible to concatenate the 7th respectively between first comparator and the electrode input end and output end of the second comparator
Resistance and the 8th resistance can add positive feedback respectively to first comparator and the second comparator, enhance first comparator and second
The overvoltage protection and under-voltage protection effect of comparator.
The embodiment of the invention also provides a kind of electronic equipment, including electric power management circuit above-mentioned, power supply and to be powered
Device；Electric power management circuit is serially connected between power output end and power supply device.
Power supply can be with the 110V-220V AC power source of dry cell (direct current) and household.
Device to be powered may include the device to be powered of various voltage ratings.
In conclusion the embodiment of the invention provides a kind of electronic equipment, electric power management circuit above-mentioned, power supply and wait supply
Electrical part；Electric power management circuit is serially connected between power output end and power supply device.Wherein, electric power management circuit includes: counnter attack
Connect circuit, overvoltage crowbar, under-voltage protecting circuit, switching circuit, detection circuit and control chip circuit；Reverse-connection preventing circuit
Input terminal is connect with power output end, the output end of reverse-connection preventing circuit respectively with the first input end of overvoltage crowbar, under-voltage
The input terminal of protection circuit is connected with the first input end of switching circuit, and reverse-connection preventing circuit reduces electric power management circuit due to anti-
A possibility that connecing, cause voltage excessive, and then electric power management circuit damage phenomenon is caused to occur；The output end of overvoltage crowbar
It is connect with the second input terminal of switching circuit, overvoltage crowbar reduces device to be powered, causes since line voltage distribution is excessively high
Device failure phenomenon to be powered occur a possibility that；The output end of switching circuit is connect with device to be powered, switching circuit
The switch of switch control electric power management circuit, and then control whether power supply gives device to be powered to power；Under-voltage protecting circuit it is defeated
Outlet respectively with the voltage input end of detection circuit, control chip first input end connect, under-voltage protecting circuit reduce to
Power supply device, a possibility that generation due to the too low caused device lifetime detraction phenomenon to be powered of line voltage distribution；Detection circuit
Signal input part is connect for inputting physical signal, the output end of detection circuit with the second input terminal of control chip, physics letter
Number for controlling the switch of detection circuit, detection circuit can control opening for detection circuit according to externally input physical signal
It closes, to pass through the switch of control chip controls electric power management circuit；The third of the output end and switching circuit that control chip is defeated
Enter end connection；The output voltage that chip is used for the output end based on under-voltage protecting circuit is controlled, according to the output end of detection circuit
Output signal, the output voltage of the output end of the switch and switching circuit of control switch circuit, so control power management electricity
The switch and electric power management circuit on road treat the supply voltage of power supply device.Chip is controlled according to the specified electricity of device to be powered
Pressure controls the resistance value size of each resistance in electric power management circuit, and then controls overvoltage crowbar and under-voltage protecting circuit
Voltage range, further reduce because voltage rating is different, need the generation of different electric power management circuit phenomenons.For electricity
The generalization of sub- equipment is got ready.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of electric power management circuit characterized by comprising reverse-connection preventing circuit, overvoltage crowbar, under-voltage protecting circuit,
Switching circuit, detection circuit and control chip circuit；
The input terminal of the reverse-connection preventing circuit is connect with power output end, the output end of the reverse-connection preventing circuit respectively with the mistake
The first input end of the first input end of voltage protection circuit, the input terminal of the under-voltage protecting circuit and the switching circuit connects
It connects；
The output end of the overvoltage crowbar is connect with the second input terminal of the switching circuit；
The output end of the switching circuit is connect with device to be powered；
The output end of the under-voltage protecting circuit respectively with the voltage input end of the detection circuit, it is described control chip first
Input terminal connection；
The signal input part of the detection circuit is for inputting physical signal, and the physical signal is for controlling the detection circuit
Switch；
The output end of the detection circuit is connect with the second input terminal of the control chip；
The output end of the control chip is connect with the third input terminal of the switching circuit；
The control chip is used for the output voltage of the output end based on the under-voltage protecting circuit, according to the detection circuit
The output signal of output end controls the output voltage of the switch of the switching circuit and the output end of the switching circuit, in turn
Control supply voltage of the switch of the electric power management circuit with the electric power management circuit to the device to be powered.
2. electric power management circuit as described in claim 1, which is characterized in that the electric power management circuit further include: often power supply
Circuit；
The input terminal of the normal power supply circuit is connect with the output end of the reverse-connection preventing circuit, and the first of the normal power supply circuit is defeated
Outlet is connect with the first input end of the overvoltage crowbar, the second output terminal of the normal power supply circuit and the under-voltage guarantor
The input terminal of protection circuit connects, and the third output end of the normal power supply circuit is connect with the first input end of the switching circuit.
3. electric power management circuit as claimed in claim 2, which is characterized in that the overvoltage crowbar compares including first
Device, first resistor and second resistance；
One end of the first resistor is connect with the first output end of the normal power supply circuit, the other end of the first resistor with
The positive input of the first comparator connects, one end of the negative input of the first comparator and the second resistance
Connection, the other end ground connection of the second resistance, the second input of the output end of the first comparator and the switching circuit
End connection.
4. electric power management circuit as claimed in claim 2, which is characterized in that the switching circuit includes the first triode, the
Two triodes, third transistor and the first Metal-oxide-semicondutor field effect transistor metal-oxide-semiconductor；
The base stage of first triode is connect with the second output terminal of the control chip, the collector of first triode
It is connect with the base stage of second triode, the emitter ground connection of first triode；The collector of second triode
Respectively with the base of the output end of the overvoltage crowbar, the third output end of the normal power supply circuit and the third transistor
Pole connection, the emitter ground connection of second triode；The grid of the collector of the third transistor and first metal-oxide-semiconductor
Connection, the emitter ground connection of the third transistor；The drain electrode of first metal-oxide-semiconductor connects with the output end of the reverse-connection preventing circuit
It connects, the source electrode of first metal-oxide-semiconductor is connect with the device to be powered.
5. electric power management circuit as claimed in claim 4, which is characterized in that the reverse-connection preventing circuit includes the second metal-oxide-semiconductor, the
One diode and the second diode；
The first diode and second diode pass through the cathode of the first diode and second diode
The anode of cathode connection, the first diode connect with the drain electrode of second metal-oxide-semiconductor, second diode positive and
The source electrode of the grounded-grid of second metal-oxide-semiconductor, second metal-oxide-semiconductor is connect with the power output end, second metal-oxide-semiconductor
Drain electrode also respectively with the first input end of the first input end of the overvoltage crowbar, the described and described switching circuit connect
It connects.
6. electric power management circuit as claimed in claim 3, which is characterized in that the under-voltage protecting circuit compares including second
Device, 3rd resistor and the 4th resistance；
One end of the 3rd resistor is connect with the second output terminal of the normal power supply circuit, the other end of the 3rd resistor with
The positive input of second comparator connects；One end of 4th resistance is grounded, the other end of the 4th resistance with
The negative input of second comparator connects；The output end of the comparator voltage input with the detection circuit respectively
It holds and is connected with the first input end of the control chip.
7. electric power management circuit as described in claim 1, which is characterized in that the detection circuit includes the 5th resistance, the 6th
Resistance, third diode and the 4th triode；
The base stage of 4th triode is inputted by the 5th resistance and third diode and the signal of the detection circuit
End connection, the collector of the 4th triode respectively with the output end of the under-voltage protecting circuit and the control chip the
The connection of two input terminals, the emitter ground connection of the 4th triode.
8. electric power management circuit as claimed in claim 5, which is characterized in that first metal-oxide-semiconductor and second metal-oxide-semiconductor are equal
For the metal-oxide-semiconductor of enhanced P-channel.
9. such as the described in any item electric power management circuits of claim 6, which is characterized in that the first comparator and described second
It is serially connected with the 7th resistance and the 8th resistance respectively between the positive input and output end of comparator；
7th resistance and the 8th resistance are respectively used to carry out just to the first comparator and second comparator
Feedback regulation.
10. a kind of electronic equipment characterized by comprising such as the described in any item electric power management circuits of claim 1-9, electricity
Source and device to be powered；
The electric power management circuit is serially connected between the power output end and the power supply device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811567215.6A CN109861176B (en) | 2018-12-20 | 2018-12-20 | Power management circuit and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811567215.6A CN109861176B (en) | 2018-12-20 | 2018-12-20 | Power management circuit and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109861176A true CN109861176A (en) | 2019-06-07 |
| CN109861176B CN109861176B (en) | 2020-09-29 |
Family
ID=66891641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811567215.6A Active CN109861176B (en) | 2018-12-20 | 2018-12-20 | Power management circuit and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109861176B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112688276A (en) * | 2020-12-28 | 2021-04-20 | 深圳市安帕尔科技有限公司 | Air station alarm host circuit and air station equipment |
| CN114253191A (en) * | 2021-12-17 | 2022-03-29 | 深圳市莫尼迪科技有限责任公司 | HDMI (high-definition multimedia interface) reverse power supply circuit and power supply method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7164214B2 (en) * | 2002-11-25 | 2007-01-16 | Dean Eisenberger | Uninterruptible DC power supply for equipment associated with a mobile site |
| CN201349121Y (en) * | 2008-12-29 | 2009-11-18 | 深圳市同洲电子股份有限公司 | Direct current input overvoltage and under-voltage protection circuit |
| CN103386934A (en) * | 2012-05-10 | 2013-11-13 | 航天信息股份有限公司 | Power supply device and power supply method of vehicle-mounted electronic device |
| CN204068246U (en) * | 2014-03-14 | 2014-12-31 | 湖南芯丰微电子有限责任公司 | A kind of low pressure drop low-power dissipation power supply protective circuit |
| CN104393558A (en) * | 2014-11-24 | 2015-03-04 | 程信羲 | Thick film low power consumption counter-attack under-voltage protection module |
| CN105305797A (en) * | 2015-10-15 | 2016-02-03 | 中国兵器工业集团第二一四研究所苏州研发中心 | Overvoltage and undervoltage protection circuit for output of DC/DC power supply |
| CN208046212U (en) * | 2018-04-20 | 2018-11-02 | 山西智源通联科技有限公司 | A kind of mining high current intrinsic safety electric source |
-
2018
- 2018-12-20 CN CN201811567215.6A patent/CN109861176B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7164214B2 (en) * | 2002-11-25 | 2007-01-16 | Dean Eisenberger | Uninterruptible DC power supply for equipment associated with a mobile site |
| CN201349121Y (en) * | 2008-12-29 | 2009-11-18 | 深圳市同洲电子股份有限公司 | Direct current input overvoltage and under-voltage protection circuit |
| CN103386934A (en) * | 2012-05-10 | 2013-11-13 | 航天信息股份有限公司 | Power supply device and power supply method of vehicle-mounted electronic device |
| CN204068246U (en) * | 2014-03-14 | 2014-12-31 | 湖南芯丰微电子有限责任公司 | A kind of low pressure drop low-power dissipation power supply protective circuit |
| CN104393558A (en) * | 2014-11-24 | 2015-03-04 | 程信羲 | Thick film low power consumption counter-attack under-voltage protection module |
| CN105305797A (en) * | 2015-10-15 | 2016-02-03 | 中国兵器工业集团第二一四研究所苏州研发中心 | Overvoltage and undervoltage protection circuit for output of DC/DC power supply |
| CN208046212U (en) * | 2018-04-20 | 2018-11-02 | 山西智源通联科技有限公司 | A kind of mining high current intrinsic safety electric source |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112688276A (en) * | 2020-12-28 | 2021-04-20 | 深圳市安帕尔科技有限公司 | Air station alarm host circuit and air station equipment |
| CN114253191A (en) * | 2021-12-17 | 2022-03-29 | 深圳市莫尼迪科技有限责任公司 | HDMI (high-definition multimedia interface) reverse power supply circuit and power supply method |
| CN114253191B (en) * | 2021-12-17 | 2024-03-19 | 深圳市莫尼迪科技有限责任公司 | HDMI interface reverse power supply circuit and power supply method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109861176B (en) | 2020-09-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101567519B (en) | Large-current pulse LD laser driving power supply | |
| CN201256290Y (en) | Protection circuit for suppressing surge current and preventing input voltage reverse connection | |
| CN201887469U (en) | Over-voltage protection circuit for radio frequency power amplifier | |
| CN207542770U (en) | A kind of DC over-voltage protection circuit and the power grid power supply voltage-stabilized power supply circuit for including it | |
| CN103941798A (en) | Low dropout regulator | |
| CN203481783U (en) | Short circuit and overcurrent protection circuit and mass production test equipment | |
| CN109861176A (en) | Electric power management circuit and system | |
| CN105553246A (en) | Power-on/power-off driving circuit and control method therefor | |
| CN103580256A (en) | Charging control circuit of battery | |
| CN109164865A (en) | A kind of overshoot protection circuit, linear voltage regulator and power module | |
| CN116567906B (en) | Ignition circuit structure of plasma system and ignition protection method | |
| CN209709677U (en) | A kind of protection circuit of high efficiency current detecting and current-limiting function | |
| CN213817240U (en) | Reverse connection voltage protection circuit | |
| CN209120062U (en) | The failure isolation circuit of BUCK converter | |
| CN203786597U (en) | Low-dropout linear regulator | |
| CN203774748U (en) | Self-recovery current foldback circuit structure | |
| CN106774589B (en) | Stable-pressure device and guard method, communication bus power supply device | |
| CN105955379B (en) | A kind of high-voltage starting circuit for turning off | |
| US11609590B2 (en) | Power supply for electric utility underground equipment | |
| CN204030941U (en) | A kind of protective circuit and voltage stabilizing circuit | |
| CN207766009U (en) | Direct-current charging post power distributing circuit and charging pile | |
| CN209217706U (en) | Surge current suppression circuit | |
| CN208608720U (en) | Intrinsic safety electric source output protection circuit | |
| CN206650837U (en) | Playback equipment powers off noise reducing circuit and playback equipment | |
| CN107276060B (en) | A kind of surge voltage dynamic suppression circuit |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Power management circuit and system Effective date of registration: 20221214 Granted publication date: 20200929 Pledgee: China Minsheng Banking Corp Shanghai branch Pledgor: SHANGHAI HUAXING DIGITAL TECHNOLOGY Co.,Ltd. Registration number: Y2022310000372 |