CN1787314A - Apparatus and method for protecting electric source - Google Patents
Apparatus and method for protecting electric source Download PDFInfo
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- CN1787314A CN1787314A CN 200510123354 CN200510123354A CN1787314A CN 1787314 A CN1787314 A CN 1787314A CN 200510123354 CN200510123354 CN 200510123354 CN 200510123354 A CN200510123354 A CN 200510123354A CN 1787314 A CN1787314 A CN 1787314A
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Abstract
This invention discloses a supply protection device including at least a protection circuit and its corresponding protection control circuit used in controlling said protection circuit to start or stop the supply protection function. This invention also discloses a supply protection method, which designs a protection circuit corresponding to the protected parameter, when the applied device works normally, said protection circuit protects the supply module, when the device carries out high speed test or high speed stress selection, the hardware or the software forbids the protection circuits to protect the supply module.
Description
Technical field
The present invention relates to power protection, be specifically related to a kind of apparatus for protecting power supply and method.
Background technology
Communication industry develop the development that has greatly promoted communication power supply rapidly.The Switching Power Supply of high frequency smallization and technology thereof have become the main flow of modern communications electric power system.In the communications field, usually rectifier is called primary power source, and DC-to-DC (DC/DC) converter is called secondary power supply.The effect of primary power source is that single-phase or three-phase alternating current net transformation are become nominal value is the DC power supply of 48V.Be all modularizations of primary power source or secondary power supply.The power module inside of communication equipment all has protective circuit usually; as current foldback circuit (OCP), overvoltage crowbar (OVP) and overtemperature protection (OTP) circuit, under-voltage protection, undercurrent protection etc.; these protective circuits are to prevent that relevant parameter surpasses and is lower than set point under some abnormal conditions, power module or system failure occur.With overtemperature protection OTP function is example; the effect of this circuit is to monitor certain some temperature by thermistor or other heat sensitive components; in case monitored some temperature surpasses set point, just forbids the output of power supply, prevents the too high device failure that causes of power supply internal temperature under unusual environment for use.
At present; the modular power supply of communication equipment generally adopts Switching Power Supply; its principle is as shown in Figure 1: power supply is mainly formed the voltage transitions that is input to output that realizes power supply by input filter circuit, variable power circuit, output filter circuit, feedback circuit and PWM (pulse-width modulation) control circuit of primary side; state informations such as version information, the power supply status output of auxiliary monitor circuit monitors power supply is arranged in addition, have protective circuit that power supply is carried out overcurrent protection, overvoltage protection, excess temperature, protection such as under-voltage.
Wherein, the principle of protective circuit is: measure voltage, electric current and the temperature of monitored point, convert monitoring parameter to voltage signal and and set point comparison.Do not set requirement if measured value does not satisfy, then forbid Power Conversion, realize defencive function power supply by pwm control circuit.
Generally when the design protection circuit, can use simple voltage comparator to realize, monitored parameter is converted to voltage signal, and compare, control power supply by result relatively and whether export with set point.Be example with the thermal-shutdown circuit that uses thermistor, its circuit diagram as shown in Figure 2:
This thermal-shutdown circuit is actual to be exactly a voltage comparator; resistance R 2 and R3 form No. one bleeder circuit; the positive pole input of dividing point b and comparator IC1 links to each other; resistance R 1 and RT1 form another road bleeder circuit; input links to each other dividing point a with comparator IC1 negative pole; form a regenerative circuit by resistance R 4, the output of IC1 improves response speed by resistance R 5.
The temperature correlation at RT1 resistance and its place, i.e. a point voltage and temperature correlation.Just produce control signal by relatively a, b two point voltages, this control signal is exported to pwm control circuit, the output of control power supply with forbid.
The effective means of control signal is relevant with thermistor type.With PTC (positive temperature coefficient, the thermistor ambient temperature significantly increases after surpassing certain value) type is example, the resistance value ratio of thermistor RT1 is less during normal use, the RT1 voltage drop is less than the voltage drop of R3, be that a point voltage is lower than the b point voltage, high control signal of comparator output allows power supply output; Otherwise if the control point temperature is too high, it is big that the RT1 resistance value significantly becomes, and then a point voltage is higher than the b point voltage, and low control signal of comparator output is forbidden level output behind the power supply.If use the thermistor of NTC (negative temperature coefficient), then control signal allows power supply output when low, forbids power supply output when high.
The protective circuit design also can select for use special-purpose monitoring components and parts to realize that this device is actual to be exactly modular comparator.According to realization principle relatively, can be divided into simulation and compare and relatively two kinds of numerals.Device for adopting the simulation manner of comparison generally has an internal reference level as set point, by the incoming level of comparison pilot signal and the relativeness of reference level, directly exports a control signal.Device for digital manner of comparison, generally wait other modes the reference value of setting to be solidificated in the non-volatile memory cells of monitoring device inside by programming, convert the A/D analog to digital conversion circuit of signal by inside of monitoring input pin to digital signal, by comparing the relativeness of set point and monitoring input parameter, directly export a control signal then.The monitoring chip of above-mentioned two kinds of manner of comparison is identical from the angle of principle, all is that external input signal and device inside preset reference value compare.With the voltage monitoring is example, its circuit diagram as shown in Figure 3:
The acp chip of this circuit is a voltage monitoring chip, and its built-in reference level is 1.25V, and monitored voltage Vout obtains a point voltage by R2 and R1 dividing potential drop, if a voltage is higher than 1.25V, then the voltage monitoring chip is exported the OVP control signal of high level.
In the power module design at present, power supply excess temperature, overvoltage, overcurrent, under-voltage and undercurrent protection function are not controlled by system.If forbid defencive function, have only power supply is handled, as remove some components and parts in the protection road or adjust some device parameters etc.If the non-open type power supply, the housing that needs to remove power supply could be handled, and operation will cause certain damage to power supply like this.
And many tests are arranged in product development, production process all is that the requirement product is operated in outside the specification temperature; as HALT (Highly Accelerated Life Test) and HASS (highly accelerated stress screen); power supply internal work temperature, output voltage or output current might surpass the short time on the protection point at this moment, make power supply be in guard mode.Therefore, in order to satisfy test request, need turn off the relevant defencive function of power supply, for the power module of general sealing, such inconvenient operation is implemented, and can produce certain damage to power supply.In addition, after protection appears in power supply,, be unfavorable for that also the location specifically is which kind of protection causes the power supply no-output if can not forbid various defencive functions separately.
Summary of the invention
The purpose of this invention is to provide a kind of apparatus for protecting power supply, to overcome in the prior art since the defencive function of power supply, control enabling of the relevant defencive function of power supply easily to the influence of some test event and forbid.
Another object of the present invention provides a kind of power protection method, realizing simply optionally opening or to forbid various defencive functions to power supply, and can damage equipment.
For this reason, the invention provides following technical scheme:
(same claim)
By above technical scheme provided by the invention as can be seen, the present invention is by increasing the protection control circuit corresponding with the various protective circuits of power supply, utilize the mode of hardware or software, realized providing enabling and forbid of defencive function protective circuit by this protection control circuit; And the protection control circuit is corresponding one by one with protective circuit, and each protective circuit can be controlled separately, therefore under some special cases, can cancel one or multinomial defencive function to power supply separately, and can not damage power supply and equipment.Particularly protective circuit is controlled, can be controlled, do not need manual intervention by systematic unity by software.Simplicity of design of the present invention, easy to operate, do not increase power supply and equipment cost basically.
Description of drawings
Fig. 1 is an existing communication device power supply (DPS) theory diagram;
Fig. 2 is thermal-shutdown circuit figure;
Fig. 3 is overvoltage crowbar figure;
Fig. 4 is an apparatus for protecting power supply theory diagram of the present invention;
Fig. 5 is the apparatus for protecting power supply first embodiment circuit diagram of the present invention;
Fig. 6 is the apparatus for protecting power supply second embodiment circuit diagram of the present invention;
Fig. 7 is apparatus for protecting power supply the 3rd an embodiment circuit diagram of the present invention;
Fig. 8 is apparatus for protecting power supply the 4th an embodiment circuit diagram of the present invention;
Fig. 9 is that apparatus of the present invention are applied to the theory diagram in the communication equipment power-supply system;
Figure 10 is that apparatus of the present invention are applied to need the logic diagram in the power-supply system of a plurality of parameter protections;
Figure 11 is the realization flow figure of the inventive method.
Embodiment
Core of the present invention is by protective circuit power module to be carried out safeguard protection, and controls its enabling or forbid function of power protection by the protection control circuit corresponding with this protective circuit.Based on protective circuit is the principle of being made up of comparator and peripheral circuit thereof mostly, adopt hardware mode, such as by wire jumper, toggle switch or other similar devices, the output of control comparator realizes enabling or forbidding of the relevant defencive function of power supply internal control; Perhaps adopt the mode of software,, realize enabling or forbidding of relevant defencive function by the output pin of the CPU in the application of power equipment by control its I/O pin or other logical device.According to the design needs, can adopt the output of different ways control comparator.When the communication equipment operate as normal, enable defencive function by the protection control circuit, make protective circuit carry out safeguard protection to power module; When communication equipment is carried out high accelerated test or highly accelerated stress screen, forbid power module being carried out safeguard protection with its corresponding protective circuit by the protection control circuit.
In order to make those skilled in the art person understand the present invention program better, the present invention is described in further detail below in conjunction with drawings and embodiments.
Reference apparatus for protecting power supply theory diagram of the present invention shown in Figure 4:
This device comprises: protective circuit S1 and protection control circuit S2, and wherein, protective circuit comprises: comparator S13; With the basic parameter acquiring unit S12 that an input of comparator links to each other, be used for importing the fiducial value of protected parameter to comparator, the fiducial value of protected parameter also may be that comparator S13 is built-in; The measurement parameter acquiring unit S11 that links to each other with another input of comparator is used for importing to comparator the measured value of protected parameter; Comparator S13 is output as power supply output control signal.For defencive functions such as overcurrent protection, overvoltage protection or overtemperature protections; under normal operation; when the actual measured value that obtains when the measurement parameter acquiring unit is lower than the fiducial value of basic parameter acquiring unit output; the power supply output control signal of comparator output allows power module out-put supply signal; otherwise, forbid power module out-put supply signal.For defencive functions such as under-voltage protection, undercurrent protections; under normal operation; when the actual measured value that obtains when the measurement parameter acquiring unit is higher than the fiducial value of basic parameter acquiring unit output; the power supply output control signal of comparator output allows power module out-put supply signal; otherwise, forbid power module out-put supply signal.
Protection control circuit S2 links to each other with protective circuit S1, is used for control protection electric circuit S1 enabling or forbid function of power protection.According to concrete application, can adopt multiple connected mode to make protection control circuit S2 be connected in protective circuit S1.Such as, will protect control circuit S2 to be connected in the input of protective circuit S1, the input of control protection electric circuit S1 is with the influence of shielding monitoring parameter; Protection control circuit S2 can also be connected in the output of protective circuit S1, isolate the output of comparator, the influence of shielding output.
Under some special cases; such as; HALT test and HASS screening; some defencive function that need forbid power supply; at this moment; make any measured value can not surpass the fiducial value that protection requires for one of comparator S13 input by protection control circuit S2; thereby make protective circuit always be in non-guard mode; that is to say; make the power supply output control signal of comparator output always allow power module out-put supply signal, the effect of Chan Shenging promptly is equivalent to forbid the defencive function of protective circuit like this.
When specific implementation, according to the practical application needs, the protection control circuit can adopt hardware controls to realize to the control of defencive function, also can adopt software control to realize.
Circuit diagram with reference to apparatus for protecting power supply first embodiment of the present invention shown in Figure 5:
This apparatus for protecting power supply plays the overheat protector effect to power supply.
Comparator IC1 sets a reference voltage (b point voltage) by resistance R 2 and R3 dividing potential drop, the a point voltage changes with the RT1 change in resistance, obtained by resistance R 1 and thermistor RT1 dividing potential drop, form a regenerative circuit by the R4 comparator, the output of IC1 improves response speed by R5.Just produce power supply output control signal by relatively a, b two point voltages, this control signal is exported to power module, the output of control power supply with forbid.
The effective means of control signal is relevant with thermistor type.With PTC (positive temperature coefficient) type is example, and the resistance value ratio of thermistor RT1 is less during normal use, and the RT1 voltage drop is less than the voltage drop of R3, and promptly a point voltage is lower than the b point voltage, and high control signal of comparator output allows power supply output; Otherwise if the control point temperature is too high, it is big that the RT1 resistance value significantly becomes, and then a point voltage is higher than the b point voltage, and low control signal of comparator output is forbidden level output behind the power supply.If use the thermistor of NTC (negative temperature coefficient), then control signal allows power supply output when low, forbids power supply output when high.
In this embodiment, the protection control circuit is realized by the mode of wire jumper.Between input of the negative pole of comparator IC1 and earth signal, increased a 2pin contact pin J1, realized that by on J1, placing a jumper cap hardware forces to forbid overheat protective function.
When RT1 uses the thermistor of PTC; if do not insert jumper cap; then the negative input end of comparator IC1 and earth signal disconnect; the protective circuit operate as normal when needs are forbidden the overheat protective function of power supply, is plugged jumper cap; the negative input end ground connection of comparator IC1; therefore the voltage drop of R3 always is higher than the voltage drop (pressure drop is 0) of RT1, and high-level control signal of comparator output always allows power supply output.
When RT1 uses the thermistor of NTC, J1 can be connected between the negative pole input and power supply signal of comparator IC1, perhaps J1 is connected between the positive pole input and earth signal of comparator IC1, it realizes that principle is similar to the above, does not repeat them here.
Also contact pin J1 can be replaced with a plucking number sign switch, the purpose that can realize forcing to forbid overheat protective function equally.
For the more convenient use that has the power supply of this protective device, can also realize forcing to forbid the defencive function of power supply by software control.
Still use the PTC thermistor to be example, the circuit diagram of reference apparatus for protecting power supply second embodiment of the present invention shown in Figure 6 with above-mentioned power supply overtemperature protection:
Triode Q1 and peripheral resistance R 7 thereof and resistance R 6 are formed a control switch; its control end is connected on I/O (I/O) pin of a central processing unit CPU; by software control this pin output high level or low level, thereby realization is to the control of function of power protection.When CPU was output as high level signal, triode Q1 was operated in the saturation region, and switching circuit is a conducting state, and the protection control signal is forced to link to each other with ground, and the overheat protector function is under an embargo.When CPU was output as low level, Q1 was operated in cut-off region, not conducting of switching circuit, and the overheat protector function is normal.R6 plays metering function in the circuit.Also can realize above-mentioned functions by other devices with switching function.
Certainly, also the control end of control switch can be connected to the output pin of other logic control devices of application of power device interior,, make this pin export high and low level, realize control function of power protection by CPU control.
Usually, CPU is generally at the application of power device interior, and power module is connected by connector with application apparatus, and a protection of definition control signal on this connector realizes that the negative input of IC1 and the I/O pin of CPU link to each other.In this case, also the protection control circuit of first embodiment can be placed on the application apparatus side.
Above-mentioned first, second embodiment is that the mode of taking to shield input is carried out to the control mode of protective circuit; also can consider the circuit diagram of reference apparatus for protecting power supply the 3rd embodiment of the present invention shown in Figure 7 during the protection Circuit Design from the angle of shielding output:
In this embodiment, thermistor type still is PTC, and whether the protection control circuit is still realized by the mode of wire jumper exporting but increased by one two input OR circuit IC2 control power supply.The output connection of comparator IC1 or the input B of door IC2; be resistance R 6 between another input A of IC2 and the earth signal; between the input A of IC2 and power supply is a 2pin contact pin J1, realizes that by place a jumper cap on J1 hardware forces to forbid overheat protective function.
When RT1 uses the thermistor of PTC, do not insert jumper cap, the A input termination low level of IC2, the protective circuit operate as normal, if the OTP protection, comparator IC1 output low level then, IC2 output low level, the output of control power remove; After plugging jumper cap, the A of IC2 input termination high level, through exclusive disjunction, the output Y of IC2 is high-level control signal all the time, promptly always allows power supply output.
Still with reference to Fig. 7, when RT1 uses the thermistor of NTC, IC2 can be replaced with dual input and door, J1 is connected between the input and earth signal of IC2, should import simultaneously and linked to each other with power supply signal by R6, other is constant.It realizes that principle is similar to the above embodiments, does not repeat them here.
According to above-mentioned principle, also contact pin J1 can be replaced with a plucking number sign switch, the purpose that can realize forcing to forbid overheat protective function equally.
According to same principle, can the overvoltage crowbar among Fig. 3 be designed, realize forbidding of control over-voltage protecting function.
For a power module, can have a plurality of protective circuits usually, such as, have overvoltage protection and overheating protection circuit simultaneously, according to aforesaid way, can a protection control circuit corresponding with it be set respectively at each protective circuit.When needs are forbidden a certain defencive function, by the operation of the protection control circuit corresponding, forbid this defencive function, and do not influence other defencive function with it.
Circuit diagram with reference to apparatus for protecting power supply the 4th embodiment of the present invention shown in Figure 8:
Present embodiment comprises the design of overheat protector and overtemperature protection simultaneously, and wherein OTP uses NTC type thermistor.From the angle of single protection, the both takes first embodiment, by a dual input or door IC3 the two is combined.When forbidding the OTP function, on contact pin J1, to place a jumper cap and realize that hardware forces to forbid overheat protective function, OTP protection this moment control signal perseverance is low, and the OTP function is under an embargo; If Vout electric voltage exception; surpass setting voltage (this moment, the c point voltage surpassed 1.25V); this moment, overvoltage protection control signal OVP was high; through exclusive disjunction; power supply output control signal Y is high; turn-off output (the OVP protection is worked), promptly OTP forbids not influencing the OVP protection, and same OVP forbids that also can not influence the OTP function forbids.Realize that hardware forces to forbid OTP, OVP defencive function if all place a jumper cap on J1, the J2, OTP and OVP protection this moment control signal perseverance is low, and through exclusive disjunction, power supply output control signal is low, allows output, thereby forbids all defencive functions.
Apparatus for protecting power supply provided by the invention can be widely used in various communication equipments and reach similarly, needs on other equipment of some special applications.
With reference to Fig. 9, Fig. 9 shows apparatus of the present invention and is applied to theory diagram in the communication equipment power-supply system:
Wherein, power module S3 comprises input filter circuit S31, power conversion circuit S32, output filter circuit S33, feedback circuit S34, pwm control circuit.
Apparatus for protecting power supply comprises: protective circuit S1 and protection control circuit S2; wherein; protective circuit comprises: comparator S13, the basic parameter acquiring unit S12 (also may be positioned at comparator S13 inside) that links to each other with an input of comparator; be used for importing the fiducial value of protected parameter to comparator; the measurement parameter acquiring unit S11 that links to each other with another input of comparator is used for importing to comparator the measured value of protected parameter.Comparator S13 is output as power supply output control signal.For defencive functions such as overcurrent protection, overvoltage protection or overtemperature protections; under normal operation; when the actual measured value that obtains when the measurement parameter acquiring unit is lower than the fiducial value of basic parameter acquiring unit output; the power supply output control signal of comparator output allows power module out-put supply signal; otherwise, forbid power module out-put supply signal.For defencive functions such as under-voltage protection, undercurrent protections; under normal operation; when the actual measured value that obtains when the measurement parameter acquiring unit is higher than the fiducial value of basic parameter acquiring unit output; the power supply output control signal of comparator output allows power module out-put supply signal; otherwise, forbid power module out-put supply signal.
The principle of the control power supply output of protection control circuit is: pwm chip generally has a low input signal that effectively enables, when this signal is the low level input, and the PWM operate as normal, the power change-over circuit is normal, and power supply is normally exported; When this signal was the high level input, PWM quit work, and circuit for power conversion is not worked, the power supply no-output.The protection control circuit produces the control that suitable control signal just can realize power supply output.If the logic level that the protection control circuit produces is improper, can adjust it by reverser.
Protection control circuit S2 is connected in protective circuit S1, is used for control protection electric circuit S1 enabling or forbid function of power protection.
According to concrete application, can adopt multiple connected mode to make protection control circuit S2 be connected in protective circuit S1.Such as, will protect control circuit S2 to be connected in the input of protective circuit S1, the input of control protection electric circuit S1 is with the influence of shielding monitoring parameter; Protection control circuit S2 can also be connected in the output of protective circuit S1, isolate the output of comparator, the influence of shielding output.
Under some special cases; such as; HALT test and HASS screening; some defencive function that need forbid power supply; at this moment; make any measured value can not surpass the fiducial value that protection requires for one of comparator S13 input by protection control circuit S2; thereby make protective circuit always be in non-guard mode; that is to say; make the power supply output control signal of comparator output always allow power module out-put supply signal, the effect of Chan Shenging promptly is equivalent to forbid the defencive function of protective circuit like this.
When specific implementation, according to the practical application needs, the protection control circuit can adopt hardware controls to realize to the control of defencive function, also can adopt software control to realize.
When the power supply design has a plurality of defencive function, can realize the independent controlled function of all defencive functions by logical combination.
When apparatus of the present invention are applied to need in the power-supply system of a plurality of parameter protections, can realize selection control by logic shown in Figure 10 to the protection of power supply different parameters:
Do not specifically describe the internal structure of each protective circuit in this embodiment.
Each independent current source protective device comprises: protection control circuit, its input can be the wire jumpers that links to each other with power supply or ground, and toggle switch or other similar control circuit also can be the output control signals of CPU or other logical device; Protective circuit (comprising input, comparison).The output signal of all protective circuits is as the input of logic control circuit.Logic control circuit is realized the logical combination of all independent protective control signals, realizes the independent control of every kind of protection, and does not influence the enforcement of other defencive functions.The output of logic control circuit is as the output control signal of whole power supply, and whether the control power supply is exported.
Suppose under each protective circuit normal condition it all is to be output as high level, this moment, logic control circuit can be a N road input and gate control.When every road protection control input inhibit should be protected, protective circuit output was permanent high.If the protection of certain road forbids, this moment should protection output high level, with logic in do not influence other defencive functions.
With reference to Figure 11, Figure 11 shows the realization flow figure of the inventive method, may further comprise the steps:
Step 1101: be provided with and the protected parameter corresponding protective circuit of power supply respectively.
Because the environment difference that power supply uses therefore for different application, may need its parameter request of protecting also different.Therefore, can be according to actual needs, power supply is provided with the protective circuit of corresponding one or two or a plurality of corresponding different parameters, to guarantee the safe in utilization of power supply.
Step 1102: when application of power equipment operate as normal, power module is carried out safeguard protection by protective circuit.
When the communication equipment operate as normal, protective circuit detects the parameters index in real time, after surpassing the predetermined parameters index, starts this defencive function to power supply, forbids power module out-put supply signal.
Step 1103: when application of power equipment non-normal working, forbid that by hardware or software one or more protective circuits carry out safeguard protection to power module.Described application of power equipment non-normal working refers to this application of power equipment is carried out high accelerated test or highly accelerated stress screen.
Under some special applications, need forbid a certain or multinomial defencive function of power supply.At this moment; at first to determine the protected parameter of the power supply that to forbid; such as; only need forbid overheat protective function to power supply; be output as steady state value by hardware or software control and the protected parameter corresponding protective circuit of power supply that need forbid then; this value satisfies does not make power supply enter guard mode, but makes its normal output.
Though described the present invention by embodiment, those of ordinary skills know, the present invention has many distortion and variation and do not break away from spirit of the present invention, wish that appended claim comprises these distortion and variation and do not break away from spirit of the present invention.
Claims (10)
1, a kind of apparatus for protecting power supply is used for power module is carried out selective protection, comprises at least one protective circuit, and described device also comprises:
The protection control circuit corresponding with described protective circuit links to each other with its corresponding protective circuit, is used to control described protective circuit enabling or forbid function of power protection.
2, apparatus for protecting power supply according to claim 1 is characterized in that, described protection control circuit is connected in the input of described protective circuit.
3, apparatus for protecting power supply according to claim 1 is characterized in that, described protection control circuit is connected in the output of described protective circuit.
According to claim 2 or 3 described apparatus for protecting power supply, it is characterized in that 4, described protection control circuit is specially: the wire jumper that links to each other with power supply or ground, the perhaps toggle switch that links to each other with power supply or ground.
5, according to claim 2 or 3 described apparatus for protecting power supply; it is characterized in that; described protection control circuit is specially: control switch; its control end links to each other with application of power device interior CPU output pin or with the output pin of other logic control devices of application of power device interior, and output links to each other with described protective circuit.
6, according to claim 2 or 3 described apparatus for protecting power supply; it is characterized in that; described device also comprises: the logic control circuit that links to each other with two or more protective circuit outputs; after being used for the guard signal that a plurality of protective circuits produce carried out logical combination, the output of power supply signal is controlled.
7, a kind of apparatus for protecting power supply places communication equipment, is used for the communication equipment power module is carried out selective protection; comprise at least one protective circuit; described protective circuit comprises: basic parameter input and measurement parameter input is characterized in that described device also comprises:
The protection control circuit corresponding with described protective circuit is specially the wire jumper contact pin or the toggle switch that are connected between input of described protective circuit and power supply or the ground, is used to control described protective circuit enabling or forbid function of power protection;
When the communication equipment operate as normal, disconnect being connected of coupled protective circuit input and power supply or ground by described wire jumper contact pin or toggle switch, described protective circuit is carried out safeguard protection to power module; When communication equipment is carried out high accelerated test or highly accelerated stress screen; by on described wire jumper contact pin, placing jumper cap or connecting being connected of coupled protective circuit input and power supply or ground, forbid that described protective circuit carries out safeguard protection to power module by toggle switch.
8, a kind of apparatus for protecting power supply; place communication equipment; be used for the communication equipment power module is carried out selective protection; comprise the protective circuit that at least one places power supply inside; described protective circuit comprises: basic parameter input and measurement parameter input; it is characterized in that described device also comprises:
The protection control circuit corresponding and be connected in protective circuit and the connector of protection between the control circuit with described protective circuit; Described protection control circuit specifically comprises: the control switch of being made up of triode and peripheral resistance thereof, its control end links to each other with application of power device interior CPU output pin or with the output pin of other logic control devices of application of power device interior, and output links to each other with described connector;
When the communication equipment operate as normal, the output pin output level of described CPU output pin or described other logic control devices disconnects control switch, and described protective circuit is carried out safeguard protection to power module; When communication equipment is carried out high accelerated test or highly accelerated stress screen; the output pin output level of described CPU output pin or described other logic control devices; make the control switch conducting, forbid that described protective circuit carries out safeguard protection to power module.
9, a kind of power protection method is characterized in that, described method comprises:
A, setting and the protected parameter corresponding protective circuit of power supply respectively;
B, when application of power equipment operate as normal, by described protective circuit power module is carried out safeguard protection;
C, when application of power equipment non-normal working, forbid that by hardware or software one or two or a plurality of protective circuit carry out safeguard protection to power module.
10, power protection method according to claim 9 is characterized in that, described step C comprises:
The protected parameter of the power supply that definite needs are forbidden;
The protected parameter corresponding protective circuit of power supply of forbidding by hardware or software control and described needs is output as steady state value,
Described application of power equipment non-normal working refers to this application of power equipment is carried out high accelerated test or highly accelerated stress screen.
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| CN102170103A (en) * | 2011-03-24 | 2011-08-31 | 华为技术有限公司 | Electronic circuit breaker and processing method thereof |
| CN102193609A (en) * | 2010-03-19 | 2011-09-21 | 宏碁股份有限公司 | Setting method for power supply locking and electronic device thereof |
| CN102545139A (en) * | 2010-12-07 | 2012-07-04 | 鸿富锦精密工业（深圳）有限公司 | Overcurrent protection device |
| CN102799257A (en) * | 2011-05-23 | 2012-11-28 | 鸿富锦精密工业（深圳）有限公司 | Power supply protection circuit |
| WO2013017110A1 (en) * | 2011-08-04 | 2013-02-07 | Huawei Technologies Co., Ltd. | High efficiency power regulator and method |
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| CN106786394B (en) * | 2016-11-28 | 2019-05-10 | 珠海恒途电子有限公司 | Interlock protection circuit |
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