CN104020705A - Power monitoring circuit with resetting function - Google Patents
Power monitoring circuit with resetting function Download PDFInfo
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- CN104020705A CN104020705A CN201410281423.5A CN201410281423A CN104020705A CN 104020705 A CN104020705 A CN 104020705A CN 201410281423 A CN201410281423 A CN 201410281423A CN 104020705 A CN104020705 A CN 104020705A
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Abstract
The invention discloses a power monitoring circuit with a resetting function. The power monitoring circuit comprises an SW172x chip and a resetting circuit. A PFI pin of the SW172x chip is connected with the input end of the Schottky protection diode VD. The RST resetting end of the SW172x chip is connected with the RST resetting end of the resetting circuit. The resetting circuit comprises a main power circuit and an auxiliary power circuit. The base electrode of a triode Q1 is connected with a power source VDD. The positive electrode of a diode D1 is connected with a resistor R13. The collector electrode of the triode Q1 is connected with the RST resetting end of the SW172x chip. As the SW172x chip, a power monitoring device and a resetting device are adopted, the functions of power-on resetting, power-down no resetting, hardware watchdog, power failure detection, manual resetting, low-power-consumption resetting state retention and the like can be achieved; the dual-power -supply power-on resetting circuit structure can guarantee reliable resetting of a single-chip microcomputer in the power-on process. Accordingly, the power monitoring circuit has the advantage of protecting electric appliances and users.
Description
Technical field
The present invention relates to a kind of supervisory circuit, specifically a kind of power supply supervisory circuit with reset function.
Background technology
Along with the various electric equipments of scientific and technical development use in electrical network, get more and more, the electric network pollution thereupon bringing is more and more serious, and the running environment of electric energy meter is more and more severe, therefore stable, the reliability service of electric energy meter are had higher requirement; And the electrify restoration circuit of the main MCU of electric energy meter, hardware watchdog circuit, power-fail detection circuit are very one of Key Circuit of electric energy meter reliability service, in electric energy meter design in the past, these circuit all adopt separating component to build, due to the One's name is legion of separating component and self there is certain parameter discrete, therefore this part circuit often exists certain unreliability and uncertainty; And in chip controls circuit, whether reset potential leans on property, be related to the security of intelligent control circuit, if run into power-off midway, when restoring electricity, require reset circuit to reset safely and reliably in time, in order to avoid electrical equipment non-normal working unexpectedly easily causes electrical equipment to damage, even jeopardize user's personal safety; Therefore,, in order to guarantee the use safety of electrical equipment, need to and set the reset circuit of single-chip microcomputer, protective device and user's safety to power supply monitoring.
Summary of the invention
The object of the present invention is to provide a kind of power supply supervisory circuit with reset function, to solve the problem proposing in above-mentioned background technology.
For achieving the above object, the invention provides following technical scheme:
With a power supply supervisory circuit for reset function, comprise SW172x chip, externally fed power supply VCC, base supply VBB, power vd D, the monitored power supply HVCC of front end, Schottky protection diode VD and reset circuit; One end of the STB pin contact resistance R1 of described SW172x chip, and the other end of resistance R 1 connects externally fed power supply VCC, the STB pin of SW172x chip also connects one end of capacitor C 1 and one end of resistance R 2 simultaneously, capacitor C 1 other end ground connection, resistance R 2 other end ground connection; One end of the MR pin contact resistance R3 of described SW172x chip, the other end of resistance R 3 connects base supply VBB; The MR pin of described SW172x chip is simultaneously by resistance R in parallel 4 and capacitor C 2 ground connection; The PFI pin of described SW172x chip connects an input end of Schottky protection diode VD, another input end of Schottky protection diode VD simultaneously contact resistance R5 one end with by being connected resistance R in parallel 6 and capacitor C 3 ground connection; The other end of described resistance R 5 connects the monitored power supply HVCC of front end; The output terminal of described Schottky protection diode VD connects externally fed power supply VCC; The WDI pin of described SW172x chip connects externally fed power supply VCC through resistance R 7; The GND pin ground connection of described SW172x chip, the PFO pin of SW172x chip is through capacitor C 5 ground connection, when the VCC of SW172x chip end connects base supply VBB, through capacitor C 4 ground connection; The RST reset terminal of described SW172x chip, the RST reset terminal of connection reset circuit; Reset circuit comprises the main power circuit being comprised of triode Q1, appearance C11, resistance R 11, resistance R 13 and diode D1 and the auxiliary power circuit being comprised of resistance R 12, diode D2 and capacitor C 12; The base stage of described triode Q1 connects power vd D by resistance R 11, capacitor C 11; Described resistance R 11 is connected with the negative pole of diode D1 with the tie point of capacitor C 11, the anodal contact resistance R13 of diode D1; The base stage of described triode Q1 is by resistance R 13 ground connection, and the collector of triode Q1 connects the RST reset terminal of SW172x chip; Described resistance R 12 is in parallel with diode D2, and it also connects externally fed power supply VCC in one end of joint group, the collector of other end while connecting triode Q1 and the RST reset terminal of SW172x chip; Described capacitor C 12 is connected across between RST reset terminal and ground wire (GND port), the grounded emitter of triode Q1; The input end of the main power circuit of reset circuit connects power vd D, and the input end of auxiliary power circuit connects externally fed power supply VCC.
Further, between described base supply VBB and SW172x chip MR pin, remain the input of MR pin high level;
Further, described triode Q1 is NPN type switch triode.
Further, main power circuit and auxiliary power circuit form duplicate supply electrification reset loop structure compared with prior art, the invention has the beneficial effects as follows: the present invention adopts SW172x chip, SW172x chip is a low-power dissipation power supply monitor data protective energy conservation chip, has wider technical grade working temperature, super wide operating voltage and low-down working current; Power Supply Monitoring setting of the present invention and the setting that resets, can realize the not function such as reset function, hardware watchdog function, detection of power loss function, hand-reset function, the maintenance of low-power consumption reset mode of electrification reset function, power down, for reliable reset, the safe operation of circuit provides powerful guarantee, and the present invention adopts major and minor two-way Power supply, the duplicate supply electrification reset loop structure of formation can guarantee single-chip microcomputer reliable reset when arbitrary power supply electrifying; When auxiliary power normal power supply, primary power powers on and also guarantees single-chip microcomputer reliable reset, has the beneficial effect of protective device and user's safety.
Accompanying drawing explanation
Fig. 1 is the circuit diagram with the power supply supervisory circuit of reset function.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1, in the embodiment of the present invention, a kind of power supply supervisory circuit with reset function, comprises SW172x chip, externally fed power supply VCC, base supply VBB, power vd D, the monitored power supply HVCC of front end, Schottky protection diode VD and reset circuit; One end of the STB pin contact resistance R1 of described SW172x chip, and the other end of resistance R 1 connects externally fed power supply VCC, the STB pin of SW172x chip also connects one end of capacitor C 1 and one end of resistance R 2 simultaneously, capacitor C 1 other end ground connection, resistance R 2 other end ground connection; One end of the MR pin contact resistance R3 of described SW172x chip, the other end of resistance R 3 connects base supply VBB, and between base supply VBB and SW172x chip MR pin, remains the input of MR pin high level; The MR pin of described SW172x chip is simultaneously by resistance R in parallel 4 and capacitor C 2 ground connection; The PFI pin of described SW172x chip connects an input end of Schottky protection diode VD, another input end of Schottky protection diode VD simultaneously contact resistance R5 one end with by being connected resistance R in parallel 6 and capacitor C 3 ground connection; The other end of described resistance R 5 connects the monitored power supply HVCC of front end; The output terminal of described Schottky protection diode VD connects externally fed power supply VCC; The WDI pin of described SW172x chip connects externally fed power supply VCC through resistance R 7; The GND pin ground connection of described SW172x chip, the PFO pin of SW172x chip is through capacitor C 5 ground connection, when the VCC of SW172x chip end connects base supply VBB, through capacitor C 4 ground connection; The RST reset terminal of described SW172x chip, the RST reset terminal of connection reset circuit; Reset circuit comprises the main power circuit being comprised of triode Q1, appearance C11, resistance R 11, resistance R 13 and diode D1 and the auxiliary power circuit being comprised of resistance R 12, diode D2 and capacitor C 12; The base stage of described triode Q1 connects power vd D by resistance R 11, capacitor C 11; Described resistance R 11 is connected with the negative pole of diode D1 with the tie point of capacitor C 11, the anodal contact resistance R13 of diode D1; The base stage of described triode Q1 is by resistance R 13 ground connection, and the collector of triode Q1 connects the RST reset terminal of SW172x chip; Described resistance R 12 is in parallel with diode D2, and it also connects externally fed power supply VCC in one end of joint group, the collector of other end while connecting triode Q1 and the RST reset terminal of SW172x chip; Described capacitor C 12 is connected across between RST reset terminal and ground wire (GND port), the grounded emitter of triode Q1; The input end of the main power circuit of reset circuit connects power vd D, the input end of auxiliary power circuit connects externally fed power supply VCC, the characteristic that main power circuit and auxiliary power circuit utilize electric capacity both end voltage not suddenly change, at the RST of SW172x chip reset terminal, produce reset pulse, form duplicate supply electrification reset loop structure.
Each pin of chip SW172x of the present invention and menu:
Chips SW172x circuit working principle of the present invention:
The power pins VCC of chip SW172x meets battery power supply VBB, guarantees that ammeter (Power supply pattern and low-power consumption mode) chip under normal condition all can normally work; The STB pin of chip SW172x is that low-power consumption mode is selected pin, when the voltage of externally fed voltage VCC is during lower than certain electrical voltage point (need to select divider resistance by design consideration), VCC is by resistance R 1, and resistance R 2, after capacitor C l dividing potential drop, the signal that STB pin is introduced in input is during higher than fixing voltage, produce door controling clock signal, chip operation and normal mode of operation, otherwise chip is in low-power consumption mode, house dog quits work, and RST pin keeps stable high level state; The MR pin of SW172x chip is hand-reset pin, once the incoming level of this pin lower than low level reset signal that on the RST pin of fixed voltage chip, output pulse width is 200MS; In this invention, because ammeter does not need to relate to hand-reset, therefore utilize VBB power supply, resistance R 3, R4 and capacitor C 2 are fixed as height by this pin incoming level, make it be greater than fixed voltage always, and this circuit can not produce reset signal because of this pin; The PF work pin of SW172x chip is detection of power loss signal pins, and when the pin of PF work is during lower than fixed voltage, PFO is low, otherwise is high; When PF work changes from low to high, chip delays is exported the reset signal of 200 milliseconds for 2 seconds afterwards; Utilize in the present invention ammeter front end power detection signal HVCC, resistance R 5, resistance R 6, capacitor C 3, protection diode VD, produce a suitable detection of power loss signal and be input to PF work end, this chip is reflected to PFO end (conventionally connecing the external interrupt input port of MCU) by the state of this pin, thereby makes main MCU real-time response detection of power loss signal, carries out the relevant work such as electric quantity data processing; The house dog feeding-dog signal pin that the WD work of chip SW172x is chip, once this pin level continues not change for 2 seconds, it is the low level reset signal of 200 milliseconds that the reset pin RST of chip just exports width; In the present invention, WD work is received on work 0 pin of main MCU conventionally, is controlled the level state of this pin by MCU, when output frequency is greater than the square-wave signal of certain frequency, chip is carried out to " feeding dog " in real time, thereby guarantees the normal operation of main MCU;
Reset circuit principle of work in the present invention:
1, primary power VDD does not power, when auxiliary power VCC powers on: when on auxiliary power, VCC is electric, charge when VCC rises to burning voltage by 0V by 12 pairs of capacitor C of resistance R 12; Because capacitor C 12 both end voltage can not be suddenlyd change, charging needs the regular hour (this time is depended on the time constant of resistance R 12 and capacitor C 12), forms the low level pulse of a period of time at RST port; When the voltage of capacitor C 12 is charged to VCC voltage, charging process finishes to make RST port to keep high level, thereby has completed the reset operation of single-chip microcomputer when auxiliary power powers on; And the effect of D2 is fast the voltage in capacitor C 12 to be bled off when auxiliary power power down, to guarantee electrification reset process next time;
2, auxiliary power VCC does not power, when primary power VDD powers on: when primary power powers on, the Base-Emitter by resistance R 11 and triode Q1 when VDD rises to burning voltage by 0V charges to capacitor C 11; Because capacitor C 11 both end voltage can not be suddenlyd change, charging needs the regular hour (this time is depended on the time constant of resistance R 11 and capacitor C 11), during charging, because the base stage that has electric current to flow through triode Q1 causes triode Q1 conducting, at RST port, form the low level pulse of a period of time; When the voltage of capacitor C 11 is charged to vdd voltage, charging process finishes triode Q1 cut-off, and makes RST port keep high level, thereby has completed the reset operation of single-chip microcomputer when primary power powers on;
3, auxiliary power power supply, when primary power powers on: when primary power powers on, the Base-Emitter by resistance R 11 and triode Q1 when VDD rises to burning voltage by 0V charges to capacitor C 11.Because capacitor C 11 both end voltage can not be suddenlyd change, charging needs the regular hour (this time is depended on the time constant of resistance R 11 and capacitor C 11), during charging, because the base stage that has electric current to flow through triode Q1 causes triode Q1 conducting, at RST port, form the low level pulse of a period of time; When the voltage of capacitor C 11 is charged to vdd voltage, charging process finishes triode Q1 cut-off, and makes RST port keep high level, thereby has completed the reset operation of single-chip microcomputer when primary power powers on.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and in the situation that not deviating from spirit of the present invention or essential characteristic, can realize the present invention with other concrete form.Therefore, no matter from which point, all should regard embodiment as exemplary, and be nonrestrictive, scope of the present invention is limited by claims rather than above-mentioned explanation, is therefore intended to include in the present invention dropping on the implication that is equal to important document of claim and all changes in scope.Any Reference numeral in claim should be considered as limiting related claim.
In addition, be to be understood that, although this instructions is described according to embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of instructions is only for clarity sake, those skilled in the art should make instructions as a whole, and the technical scheme in each embodiment also can, through appropriately combined, form other embodiments that it will be appreciated by those skilled in the art that.
Claims (4)
1. with a power supply supervisory circuit for reset function, comprise SW172x chip, externally fed power supply VCC, base supply VBB, power vd D, the monitored power supply HVCC of front end, Schottky protection diode VD and reset circuit; It is characterized in that: one end of the STB pin contact resistance R1 of described SW172x chip, and the other end of resistance R 1 connects externally fed power supply VCC, the STB pin of SW172x chip also connects one end of capacitor C 1 and one end of resistance R 2 simultaneously, capacitor C 1 other end ground connection, resistance R 2 other end ground connection; One end of the MR pin contact resistance R3 of described SW172x chip, the other end of resistance R 3 connects base supply VBB; The MR pin of described SW172x chip is simultaneously by resistance R in parallel 4 and capacitor C 2 ground connection; The PFI pin of described SW172x chip connects an input end of Schottky protection diode VD, another input end of Schottky protection diode VD simultaneously contact resistance R5 one end with by being connected resistance R in parallel 6 and capacitor C 3 ground connection; The other end of described resistance R 5 connects the monitored power supply HVCC of front end; The output terminal of described Schottky protection diode VD connects externally fed power supply VCC; The WDI pin of described SW172x chip connects externally fed power supply VCC through resistance R 7; The GND pin ground connection of described SW172x chip, the PFO pin of SW172x chip is through capacitor C 5 ground connection, when the VCC of SW172x chip end connects base supply VBB, through capacitor C 4 ground connection; The RST reset terminal of described SW172x chip, the RST reset terminal of connection reset circuit; Reset circuit comprises the main power circuit being comprised of triode Q1, appearance C11, resistance R 11, resistance R 13 and diode D1 and the auxiliary power circuit being comprised of resistance R 12, diode D2 and capacitor C 12; The base stage of described triode Q1 connects power vd D by resistance R 11, capacitor C 11; Described resistance R 11 is connected with the negative pole of diode D1 with the tie point of capacitor C 11, the anodal contact resistance R13 of diode D1; The base stage of described triode Q1 is by resistance R 13 ground connection, and the collector of triode Q1 connects the RST reset terminal of SW172x chip; Described resistance R 12 is in parallel with diode D2, and it also connects externally fed power supply VCC in one end of joint group, the collector of other end while connecting triode Q1 and the RST reset terminal of SW172x chip; Described capacitor C 12 is connected across between RST reset terminal and ground wire (GND port), the grounded emitter of triode Q1; The input end of the main power circuit of reset circuit connects power vd D, and the input end of auxiliary power circuit connects externally fed power supply VCC.
2. the power supply supervisory circuit with reset function according to claim 1, is characterized in that, remains the input of MR pin high level between described base supply VBB and SW172x chip MR pin.
3. the power supply supervisory circuit with reset function according to claim 1, is characterized in that, described triode Q1 is NPN type switch triode.
4. the power supply supervisory circuit with reset function according to claim 1, is characterized in that, main power circuit and auxiliary power circuit form duplicate supply electrification reset loop structure.
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| CN201410281423.5A CN104020705A (en) | 2014-06-23 | 2014-06-23 | Power monitoring circuit with resetting function |
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| CN201410281423.5A CN104020705A (en) | 2014-06-23 | 2014-06-23 | Power monitoring circuit with resetting function |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105242766A (en) * | 2015-10-22 | 2016-01-13 | 深圳拓邦股份有限公司 | Voltage leap detection circuit, reset circuit and electronic device |
| CN105739657A (en) * | 2016-02-02 | 2016-07-06 | 西安诺瓦电子科技有限公司 | Circuit structure applied to embedded system |
| CN106445057A (en) * | 2016-11-08 | 2017-02-22 | 福建星海通信科技有限公司 | Automatic and fast discharging circuit and method for monitoring power supply power down |
| CN106788361A (en) * | 2017-03-31 | 2017-05-31 | 东莞博力威电池有限公司 | MCU is long to press reset circuit |
| CN106950876A (en) * | 2017-03-20 | 2017-07-14 | 上海理工大学 | Power supply is locked and wake-up circuit and power module |
| CN108466554A (en) * | 2018-04-21 | 2018-08-31 | 浙江合众新能源汽车有限公司 | BMS multifunctional unit electric power management circuits |
| CN108693947A (en) * | 2018-05-21 | 2018-10-23 | 安徽集弘物联科技有限公司 | One kind being used for intelligent power resetting apparatus |
| CN111752176A (en) * | 2019-03-28 | 2020-10-09 | 天津大学 | Micro-pollutant detection equipment's single chip microcomputer system |
| CN112887438A (en) * | 2021-04-29 | 2021-06-01 | 深圳市永联科技股份有限公司 | Energy controller, system image file downloading method and file downloading system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59206901A (en) * | 1983-05-11 | 1984-11-22 | Mitsubishi Electric Corp | Controlling circuit of programmable controller |
| CN101446912A (en) * | 2008-12-05 | 2009-06-03 | 深圳林洋电子科技有限公司 | Monitoring circuit |
| CN101751098A (en) * | 2008-12-02 | 2010-06-23 | 华为技术有限公司 | Method, device and system for realizing reset control |
| CN101980444A (en) * | 2010-08-05 | 2011-02-23 | 上海闻泰电子科技有限公司 | Circuit for forcibly resetting system powered by battery without removing battery |
| CN202737830U (en) * | 2012-06-17 | 2013-02-13 | 珠海中慧微电子有限公司 | Power supply monitoring circuit based on SW172x chip |
-
2014
- 2014-06-23 CN CN201410281423.5A patent/CN104020705A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59206901A (en) * | 1983-05-11 | 1984-11-22 | Mitsubishi Electric Corp | Controlling circuit of programmable controller |
| CN101751098A (en) * | 2008-12-02 | 2010-06-23 | 华为技术有限公司 | Method, device and system for realizing reset control |
| CN101446912A (en) * | 2008-12-05 | 2009-06-03 | 深圳林洋电子科技有限公司 | Monitoring circuit |
| CN101980444A (en) * | 2010-08-05 | 2011-02-23 | 上海闻泰电子科技有限公司 | Circuit for forcibly resetting system powered by battery without removing battery |
| CN202737830U (en) * | 2012-06-17 | 2013-02-13 | 珠海中慧微电子有限公司 | Power supply monitoring circuit based on SW172x chip |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105242766B (en) * | 2015-10-22 | 2017-11-28 | 深圳拓邦股份有限公司 | A kind of voltage jump detection circuit, reset circuit and electronic installation |
| WO2017067306A1 (en) * | 2015-10-22 | 2017-04-27 | 深圳拓邦股份有限公司 | Circuit for detecting abrupt change in voltage, reset circuit and electronic device |
| CN105242766A (en) * | 2015-10-22 | 2016-01-13 | 深圳拓邦股份有限公司 | Voltage leap detection circuit, reset circuit and electronic device |
| CN105739657A (en) * | 2016-02-02 | 2016-07-06 | 西安诺瓦电子科技有限公司 | Circuit structure applied to embedded system |
| CN106445057A (en) * | 2016-11-08 | 2017-02-22 | 福建星海通信科技有限公司 | Automatic and fast discharging circuit and method for monitoring power supply power down |
| CN106950876A (en) * | 2017-03-20 | 2017-07-14 | 上海理工大学 | Power supply is locked and wake-up circuit and power module |
| CN106788361B (en) * | 2017-03-31 | 2023-04-11 | 广东博力威科技股份有限公司 | MCU long-press reset circuit |
| CN106788361A (en) * | 2017-03-31 | 2017-05-31 | 东莞博力威电池有限公司 | MCU is long to press reset circuit |
| CN108466554A (en) * | 2018-04-21 | 2018-08-31 | 浙江合众新能源汽车有限公司 | BMS multifunctional unit electric power management circuits |
| CN108466554B (en) * | 2018-04-21 | 2023-10-24 | 合众新能源汽车股份有限公司 | BMS multifunctional integrated power management circuit |
| CN108693947A (en) * | 2018-05-21 | 2018-10-23 | 安徽集弘物联科技有限公司 | One kind being used for intelligent power resetting apparatus |
| CN108693947B (en) * | 2018-05-21 | 2021-04-06 | 安徽集弘物联科技有限公司 | Be used for intelligent power resetting means |
| CN111752176A (en) * | 2019-03-28 | 2020-10-09 | 天津大学 | Micro-pollutant detection equipment's single chip microcomputer system |
| CN112887438A (en) * | 2021-04-29 | 2021-06-01 | 深圳市永联科技股份有限公司 | Energy controller, system image file downloading method and file downloading system |
| CN112887438B (en) * | 2021-04-29 | 2021-07-13 | 深圳市永联科技股份有限公司 | Energy controller, system image file downloading method and file downloading system |
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Application publication date: 20140903 |