CN108693947B - Be used for intelligent power resetting means - Google Patents
Be used for intelligent power resetting means Download PDFInfo
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- CN108693947B CN108693947B CN201810487490.0A CN201810487490A CN108693947B CN 108693947 B CN108693947 B CN 108693947B CN 201810487490 A CN201810487490 A CN 201810487490A CN 108693947 B CN108693947 B CN 108693947B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/24—Resetting means
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/22—Modifications for ensuring a predetermined initial state when the supply voltage has been applied
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Abstract
The invention discloses an intelligent power supply resetting device which comprises a SW172x chip, a TPS7301 low dropout regulator, a power supply VDD, an external power supply VCC, a front-end monitored power supply HVCC, a base power supply VBB and a resetting circuit, wherein a pin of an STB (base station) of the SW172x chip is grounded with one end of a pin MR, a PFI pin and a PFI pin of the SW172x chip are connected with one end of a capacitor C1, the other end of the capacitor C1 is grounded, and the PFI pin and the WDI pin of the SW172x chip are also connected with the front-end monitored power supply HVCC. The invention comprises the following steps: the power supply of the main power supply and the auxiliary power supply is adopted, the formed double-power-supply power-on reset loop structure can ensure that the single chip microcomputer can be reliably reset when any power supply is powered on, and when the auxiliary power supply is normally powered on, the power supply of the main power supply also ensures that the single chip microcomputer is reliably reset, so that the safety of an electric appliance and a user is effectively protected.
Description
Technical Field
The invention relates to the technical field of power supplies, in particular to an intelligent power supply resetting device.
Background
Along with the development of scientific technology, various electrical equipment are used more and more in a power grid, the pollution of the power grid caused by the development of the scientific technology is more and more serious, and the operation environment of the electric energy meter is more and more severe, so higher requirements are provided for the stable and reliable operation of the electric energy meter, a power-on reset circuit, a hardware watchdog circuit and a power failure detection circuit of a main MCU of the electric energy meter are one of the extremely critical circuits for the reliable operation of the electric energy meter, in the design of the traditional electric energy meter, the circuits are all built by adopting separating components, and because the number of the separating components is large and certain parameter discreteness exists in the circuits, certain unreliability and uncertainty exist in the part of the circuits, in addition, whether the reset potential is reliable or not in a chip control circuit is related to the safety of an intelligent control circuit, if power failure occurs midway, the reset circuit is required to be timely, safely and reliably reset, therefore, in order to ensure the safety of the electric appliance, the power supply needs to be monitored, a reset circuit of the singlechip is arranged, and the safety of the electric appliance and a user is protected.
An effective solution to the problems in the related art has not been proposed yet.
Disclosure of Invention
The present invention provides an intelligent power reset device for solving the above-mentioned problems in the related art.
The technical scheme of the invention is realized as follows:
an intelligent power supply resetting device comprises a SW172x chip, a TPS7301 low dropout regulator, a power supply VDD, an external power supply VCC, a front-end monitored power supply HVCC, a base power supply VBB and a resetting circuit, wherein a SW172x chip STB pin is grounded with one end of an MR pin, a SW172x chip PFI pin and a SW 34 pin are connected with one end of a capacitor C1, the other end of the capacitor C1 is grounded, a SW172x chip PFI pin and a SW pin are also connected with the front-end monitored power supply HVCC, a SW172x chip PFO pin, a RST pin and a VCC pin are connected with one end of a capacitor C2, the other end of the capacitor C2 is grounded, a SW172x chip PFO pin, a RST pin and a VCC pin are also connected with a resistor R2, one end of a resistor R2 is connected with the base power supply VBB, and the other end of the resistor R2 is connected with a resistor R1;
a SENSE pin, a 10UT pin and a 20UT pin of the TPS7301 low dropout regulator are connected with a resistor R5, one end of the resistor R5 is connected with one end of a resistor R6, the other end of the resistor R6 is grounded, one ends of a resistor R5 and a resistor R6 are connected with one end of a capacitor C4, one ends of a gnd pin and an EN pin of the TPS7301 low dropout regulator are grounded, one ends of a capacitor C3 are connected with an IN pin and a 2IN pin of the TPS7301 low dropout regulator 1, the other end of the capacitor C3 is connected with one end of the EN pin, one end of the 2IN pin is connected with one end of a diode D2, the other end of the diode D2 is connected with one end of a resistor R3, the other end of the resistor R3 is connected with the gnd pin, the other end of the resistor R3 is connected with one end of a resistor R4, one end of the diode D1 is connected with one end of the diode D1, the other end of the diode D1 is connected, a GND pin of the SW172x chip and a RESET pin of the TPS7301 low dropout regulator are connected to a triode Q1, one end of the triode Q1 is connected to one end of a resistor R9, the other end of the resistor R9 is connected to the power supply VCC, one end of the resistor R9 is connected to one end of a diode D4, the other end of the diode D4 is connected to one end of a capacitor C5, one end of the triode Q1 is connected to one end of a resistor R7, the other end of the resistor R7 is connected to one end of a resistor R8, one end of the resistor R8 is connected to one end of a diode D3, one end of the diode D3 is connected to one end of a capacitor C6, and the other end of the capacitor C6 is connected to the power supply VDD.
Further, the transistor Q1 is an NPN-type switching transistor.
Further, the voltage of the front-end monitored power source HVCC is 5V.
Further, the voltage of the pole power VBB is 3.3V.
Further, the capacitance value of the capacitor C2 and the capacitance value of the capacitor C4 are 10 uF.
Further, the capacitance value of the capacitor C1 and the capacitance value of the capacitor C3 are 0.1 uF.
Further, the resistance values of the resistor R1, the resistor R2, the resistor R3, the resistor R4, the resistor R5, the resistor R6, the resistor R7, the resistor R8 and the resistor R9 are between 100 Ω -1K Ω.
The invention has the beneficial effects that: the power-on reset function, the power-off non-reset function, the hardware watchdog function, the power-off detection function, the manual reset function, the low-power-consumption reset state keeping function and the like can be realized by adopting the SW172x chip and the TPS7301 low dropout regulator, powerful guarantee is provided for reliable reset and safe operation of a circuit, the SW172x chip is a low-power-consumption power supply monitoring data protection energy-saving chip, the chip has wider industrial-grade working temperature, ultra-wide working voltage and very low working current, power is supplied by adopting a main power supply and an auxiliary power supply, the formed double-power-supply power-on reset loop structure can ensure reliable reset of the single chip when any power supply is powered on, when the auxiliary power supply is normally powered, the main power supply also ensures reliable reset of the single chip, and safety of electric appliances and.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a circuit diagram for an intelligent power reset device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
According to an embodiment of the present invention, there is provided an apparatus for intelligent power reset.
As shown in fig. 1, the intelligent power supply resetting device according to the embodiment of the invention comprises a SW172x chip, a TPS7301 low dropout regulator, a power supply VDD, an external power supply VCC, a front-end monitored power HVCC, a base power supply VBB and a resetting circuit, wherein, the SW172x chip STB pin and one end of the MR pin are grounded, the SW172x chip PFI pin and the WDI pin are connected with one end of a capacitor C1, the other end of the capacitor C1 is grounded, and the PFI pin and the WDI pin of the SW172x chip are also connected to the front-end monitored power HVCC, one end of a capacitor C2 is connected with the PFO pin, the RST pin and the VCC pin of the SW172x chip, the other end of the capacitor C2 is grounded, and the pin PFO, the pin RST and the pin VCC of the SW172x chip are connected with a resistor R2, one end of the resistor R2 is connected with the base power supply VBB, and the other end of the resistor R2 is connected with a resistor R1;
a SENSE pin, a 10UT pin and a 20UT pin of the TPS7301 low dropout regulator are connected with a resistor R5, one end of the resistor R5 is connected with one end of a resistor R6, the other end of the resistor R6 is grounded, one ends of a resistor R5 and a resistor R6 are connected with one end of a capacitor C4, one ends of a gnd pin and an EN pin of the TPS7301 low dropout regulator are grounded, one ends of a capacitor C3 are connected with an IN pin and a 2IN pin of the TPS7301 low dropout regulator 1, the other end of the capacitor C3 is connected with one end of the EN pin, one end of the 2IN pin is connected with one end of a diode D2, the other end of the diode D2 is connected with one end of a resistor R3, the other end of the resistor R3 is connected with the gnd pin, the other end of the resistor R3 is connected with one end of a resistor R4, one end of the diode D1 is connected with one end of the diode D1, the other end of the diode D1 is connected, a GND pin of the SW172x chip and a RESET pin of the TPS7301 low dropout regulator are connected to a triode Q1, one end of the triode Q1 is connected to one end of a resistor R9, the other end of the resistor R9 is connected to the power supply VCC, one end of the resistor R9 is connected to one end of a diode D4, the other end of the diode D4 is connected to one end of a capacitor C5, one end of the triode Q1 is connected to one end of a resistor R7, the other end of the resistor R7 is connected to one end of a resistor R8, one end of the resistor R8 is connected to one end of a diode D3, one end of the diode D3 is connected to one end of a capacitor C6, and the other end of the capacitor C6 is connected to the power supply VDD.
By means of the technical scheme, the power-on reset function, the power-off non-reset function, the hardware watchdog function, the power-off detection function, the manual reset function, the low-power-consumption reset state keeping function and the like can be achieved by the SW172x chip and the TPS7301 low dropout regulator, powerful guarantee is provided for reliable reset and safe operation of a circuit, the SW172x chip is a low-power-consumption power supply monitoring data protection energy-saving chip, the chip has wide industrial-grade working temperature, ultra-wide working voltage and very low working current, power is supplied by the main power supply and the auxiliary power supply, the formed double-power-supply power-on reset loop structure can guarantee reliable reset of the single chip when any power supply is powered on, when the auxiliary power supply is normal, the main power supply also guarantees reliable reset of the single chip when the auxiliary power supply is powered on.
In addition, in one embodiment, the transistor Q1 is an NPN type switching transistor.
Additionally, in one embodiment, the front end monitored power source HVCC is 5V.
In addition, in one embodiment, the voltage of the pole power supply VBB is 3.3V.
In addition, in one embodiment, the capacitance values of the capacitor C2 and the capacitor C4 are 10 uF.
In addition, in one embodiment, the capacitance values of the capacitor C1 and the capacitor C3 are 0.1 uF.
In addition, in one embodiment, the resistance of the resistor R1, the resistor R2, the resistor R3, the resistor R4, the resistor R5, the resistor R6, the resistor R7, the resistor R8 and the resistor R9 is between 100 Ω and 1K Ω.
In summary, by means of the above technical solution of the present invention, the functions of power-on reset, power-off non-reset, hardware watchdog, power-off detection, manual reset, and low-power-consumption reset state maintenance can be realized by using the SW172x chip and the TPS7301 low dropout regulator, so as to provide powerful guarantee for reliable reset and safe operation of the circuit, while the SW172x chip is a low-power-consumption power supply monitoring data protection energy-saving chip, and has a relatively wide industrial-level working temperature, a super-wide working voltage, and a very low working current, and is powered by using the main power supply and the auxiliary power supply, so that the double-power-supply power-on reset loop structure formed by the main power supply and the auxiliary power supply can ensure reliable reset of the single chip when any power supply is powered on, and when the auxiliary power supply is normal, the main power supply also ensures reliable reset of.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. The intelligent power supply resetting device is characterized by comprising a SW172x chip, a TPS7301 low-dropout regulator, a power supply VDD, an external power supply VCC, a front-end monitored power supply HVCC, a base power supply VBB and a resetting circuit, wherein a SW172x chip STB pin is grounded with one end of an MR pin, a SW172x chip PFI pin and a WDI pin are connected with one end of a capacitor C1, the other end of the capacitor C1 is grounded, the SW172x chip PFI pin and the WDI pin are also connected with the front-end monitored power supply HVCC, a SW172x chip PFO pin, a RST pin and a VCC pin are connected with one end of a capacitor C2, the other end of the capacitor C2 is grounded, a SW172x chip PFO pin, a RST pin and a VCC pin are also connected with a resistor R2, one end of a resistor R2 is connected with the base power supply VBB, and the other end of the resistor R2 is connected with a resistor R1;
a SENSE pin, a 10UT pin and a 20UT pin of the TPS7301 low dropout regulator are connected with a resistor R5, one end of the resistor R5 is connected with one end of a resistor R6, the other end of the resistor R6 is grounded, one ends of a resistor R5 and a resistor R6 are connected with one end of a capacitor C4, one ends of a gnd pin and an EN pin of the TPS7301 low dropout regulator are grounded, one ends of a capacitor C3 are connected with an IN pin and a 2IN pin of the TPS7301 low dropout regulator 1, the other end of the capacitor C3 is connected with one end of the EN pin, one end of the 2IN pin is connected with one end of a diode D2, the other end of the diode D2 is connected with one end of a resistor R3, the other end of the resistor R3 is connected with the gnd pin, the other end of the resistor R3 is connected with one end of a resistor R4, one end of the diode D1 is connected with one end of the diode D1, the other end of the diode D1 is connected, a GND pin of the SW172x chip and a RESET pin of the TPS7301 low dropout regulator are connected to a triode Q1, one end of the triode Q1 is connected to one end of a resistor R9, the other end of the resistor R9 is connected to the power supply VCC, one end of the resistor R9 is connected to one end of a diode D4, the other end of the diode D4 is connected to one end of a capacitor C5, one end of the triode Q1 is connected to one end of a resistor R7, the other end of the resistor R7 is connected to one end of a resistor R8, one end of the resistor R8 is connected to one end of a diode D3, one end of the diode D3 is connected to one end of a capacitor C6, and the other end of the capacitor C6 is connected to the power supply VDD.
2. The device according to claim 1, wherein the transistor Q1 is an NPN-type switching transistor.
3. The device according to claim 1, wherein the voltage of the front-end monitored power source HVCC is 5V.
4. The device as claimed in claim 1, wherein the voltage of the base power VBB is 3.3V.
5. The device as claimed in claim 1, wherein the capacitance of the capacitor C2 and the capacitance of the capacitor C4 are 10 uF.
6. The device as claimed in claim 1, wherein the capacitance values of the capacitor C1 and the capacitor C3 are 0.1 uF.
7. The device as claimed in claim 1, wherein the resistance of the resistor R1, the resistor R2, the resistor R3, the resistor R4, the resistor R5, the resistor R6, the resistor R7, the resistor R8 and the resistor R9 is between 100 Ω -1K Ω.
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| CN201810487490.0A CN108693947B (en) | 2018-05-21 | 2018-05-21 | Be used for intelligent power resetting means |
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| CN201810487490.0A CN108693947B (en) | 2018-05-21 | 2018-05-21 | Be used for intelligent power resetting means |
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| CN108693947B true CN108693947B (en) | 2021-04-06 |
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