CN210225052U - Power-down protection circuit for data card - Google Patents
Power-down protection circuit for data card Download PDFInfo
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- CN210225052U CN210225052U CN201921123619.6U CN201921123619U CN210225052U CN 210225052 U CN210225052 U CN 210225052U CN 201921123619 U CN201921123619 U CN 201921123619U CN 210225052 U CN210225052 U CN 210225052U
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Abstract
The utility model provides a data card power-down protection circuit, including the positive end VIN of input power, input power negative terminal GND, main power switch, microcontroller, energy storage module, voltage monitoring module, Bulk/Boost controller, the energy storage module switch tube, the Boost switch tube, the Bulk switch tube, the energy storage inductance, the positive end VOUT of output power, output power negative terminal GND, earlier charge to energy storage module when going up, when taking place the unusual power-down, output power is supplied power by energy storage module, the data card learns the condition of the unusual power-down through PLI and has taken place, the power that utilizes energy storage module to provide does corresponding protection work to data, in order to reach the condition of avoiding data anomaly.
Description
Technical Field
The utility model belongs to the technical field of the avionics, concretely relates to data card power-down protection circuit.
Background
The data card is used for storing user data and has the characteristics of no data loss after power failure and the like. The data card reads and writes data through the operation of the internal read-write control unit on the storage area of the data card.
When the power supply of the data card is abnormally cut off, the operation logic of the internal read-write control unit is abnormal, and further, a small amount of data is stored wrongly.
SUMMERY OF THE UTILITY MODEL
The utility model aims at: in order to solve the problem that present data card data abnormity when the electricity falls, the utility model provides a data card power-down protection circuit.
In order to realize the purpose of the utility model, the utility model provides a following technical scheme:
the utility model provides a data card power-fail protection circuit, includes input power supply positive end VIN, input power supply negative end GND, main power switch, microcontroller, energy storage module, voltage monitoring module, Bulk/Boost controller, energy storage module switch tube, Boost switch tube, Bulk switch tube, energy storage inductance, output power supply positive end VOUT, output power supply negative end GND, wherein:
a Bulk/Boost controller, a Boost switching tube and an energy storage inductor form a Boost DC/DC, an output power supply positive end VOUT12 is used as an input power supply, an energy storage module switching tube is turned on, and energy is stored for an energy storage module through the Boost DC/DC;
the buck DC/DC converter is characterized in that a buck DC/DC is formed by a Bulk/Boost controller, a Bulk switching tube and an energy storage inductor, when abnormal power failure occurs, an energy storage module is used as an input power supply, the energy storage module switching tube is turned on, and the buck DC/DC is used as an output power supply positive end VOUT12 output power supply;
the voltage monitoring module is used for monitoring the voltage of the input power supply positive end VIN and the energy storage module;
the microcontroller is used for controlling the on and off of the main power switch; the microcontroller is also used for controlling the Bulk/Boost controller to send a control signal.
The protection circuit for the data card in abnormal power failure is also provided with a power failure signal output end PLI, and the microcontroller sends a power failure signal to the power failure signal output end PLI.
The utility model discloses earlier charge to energy storage module when going up the electricity, when taking place unusual the electricity down, output power is supplied power by energy storage module, and the data card learns through PLI that the condition of unusual electricity down has taken place, utilizes the power that energy storage module provided to do corresponding protection work to data to reach the condition of avoiding data anomaly.
The utility model discloses the beneficial effect who reaches is: the utility model discloses can realize continuing to provide the power supply of certain time to the data card after the electricity falls unusually to accomplish data protection work, compare the data card of electricity protect function, effectively prevented the unusual emergence of data when the electricity falls unusually, improve the reliability greatly.
Drawings
Fig. 1 is the utility model discloses data card unusual power down protection circuit schematic block diagram.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings, please refer to fig. 1.
The protection circuit for the abnormal power failure of the data card comprises an input power supply positive end VIN01, an input power supply negative end GND02, a main power switch 03, a microcontroller 04, an energy storage module 05, a voltage monitoring module 06, a Bulk/Boost controller 07, an energy storage module switch tube 08, a Boost switch tube 09, a Bulk switch tube 10, an energy storage inductor 11, an output power supply positive end VOUT12 and an output power supply negative end GND13, wherein the energy storage module 05 adopts a capacitive energy storage module, wherein:
a Bulk/Boost controller 07, a Boost switching tube 09 and an energy storage inductor 11 form a Boost DC/DC, an output power supply positive end VOUT12 is used as an input power supply, an energy storage module switching tube 08 is turned on, and energy is stored for a capacitive energy storage module through the Boost DC/DC;
the buck DC/DC converter is characterized in that a Bulk/Boost controller 07, a Bulk switching tube 10 and an energy storage inductor 11 form a buck DC/DC converter, when abnormal power failure occurs, a capacitive energy storage module is used as an input power supply, an energy storage module switching tube 08 is turned on, and the buck DC/DC converter is used as an output power supply positive end VOUT12 to output power supply;
the voltage monitoring module 06 is configured to monitor voltages of the input power positive terminal VIN01 and the capacitive energy storage module;
the microcontroller 04 is used for controlling the on and off of the main power switch 03; the microcontroller 04 is also used to control the Bulk/Boost controller 07 to send a control signal.
The protection circuit for the abnormal power failure of the data card is also provided with a power failure signal output end PLI14, and a microcontroller 04 sends a power failure signal to a power failure signal output end PLI 14.
The working process of the utility model is as follows:
(1) at power-on
After a power supply is electrified, a main power switch 03 is turned on by a microcontroller module, a data card obtains the power supply from an output power supply positive end 12, the microcontroller sends a signal to a Bulk/Boost controller 07, the Bulk/Boost controller 07 turns on an energy storage module switching tube 08 and turns off a Bulk switching tube 10, the Bulk/Boost controller 07, a Boost switching tube 09 and an energy storage inductor 11 form a Boost type DC/DC, the output power supply positive end 12 serves as an input power supply through the Boost type DC/DC to charge a capacitive energy storage module, when a voltage monitoring module 06 detects that the voltage value of the capacitive energy storage module reaches a target value, the signal is sent to the microcontroller 04, and the microcontroller 04 turns off the energy storage module switching tube 08 and the Boost switching tube 09 through the Bulk/Boost controller 07.
(2) In normal operation
When normal work, when the power did not take place unusually promptly, because the switch tube has weak leakage current, consequently capacitanc energy storage module's voltage can reduce gradually, in order to prevent when the unusual power failure takes place, can provide enough long-time energy for the data card, voltage monitoring module 06 can constantly monitor capacitanc energy storage module's voltage, in case the voltage falls to below 90% of target value, the operation when will repeatedly electrifying, for capacitanc energy storage module charges promptly.
(3) In case of abnormal power failure
When the power failure of the positive terminal 01 of the input power supply is abnormal, the voltage monitoring module 06 detects that the condition can send a signal to the microcontroller 04, the microcontroller opens the energy storage module switching tube 08, closes the Boost switching tube 09 and closes the main power supply switch 03 through the Bulk/Boost controller 07, and the step-down DC/DC composed of the Bulk/Boost controller 07, the Bulk switching tube 10 and the energy storage inductor provides power to the positive terminal C12 of the output power supply through the step-down DC/DC by taking the capacitive energy storage module as the input power supply. The microcontroller can also send out a power failure abnormal signal through a power failure signal output end PLI14 immediately after the abnormal power failure occurs, and the data card immediately executes the related work of data protection after receiving the signal.
Claims (3)
1. A kind of data card power down protective circuit, characterized by that: including input power supply positive terminal VIN (01), input power supply negative terminal GND (02), main power switch (03), microcontroller (04), energy storage module (05), voltage monitoring module (06), Bulk/Boost controller (07), energy storage module switch tube (08), Boost switch tube (09), Bulk switch tube (10), energy storage inductance (11), output power supply positive terminal VOUT (12), output power supply negative terminal GND (13), wherein:
a Bulk/Boost controller (07), a Boost switching tube (09) and an energy storage inductor (11) form a Boost DC/DC, an output power supply positive end VOUT (12) is used as an input power supply, an energy storage module switching tube (08) is turned on, and energy is stored in an energy storage module (05) through the Boost DC/DC;
the buck DC/DC converter is characterized in that a buck DC/DC is formed by a Bulk/Boost controller (07), a Bulk switching tube (10) and an energy storage inductor (11), when abnormal power failure occurs, an energy storage module (05) is used as an input power supply, an energy storage module switching tube (08) is turned on, and the buck DC/DC is used as an output power supply positive end VOUT (12) to output power supply;
the voltage monitoring module (06) is used for monitoring the voltages of the input power supply positive terminal VIN (01) and the energy storage module (05);
the microcontroller (04) is used for controlling the opening and closing of the main power switch (03); the microcontroller (04) is also used for controlling the Bulk/Boost controller (07) to send a control signal.
2. The power-down protection circuit for a data card of claim 1, wherein: and a power down signal output end PLI (14) is also arranged, and a microcontroller (04) sends a power down signal to the power down signal output end PLI (14).
3. The power-down protection circuit for a data card of claim 1, wherein: the energy storage module (05) is a capacitive energy storage module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921123619.6U CN210225052U (en) | 2019-07-17 | 2019-07-17 | Power-down protection circuit for data card |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921123619.6U CN210225052U (en) | 2019-07-17 | 2019-07-17 | Power-down protection circuit for data card |
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| Publication Number | Publication Date |
|---|---|
| CN210225052U true CN210225052U (en) | 2020-03-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921123619.6U Active CN210225052U (en) | 2019-07-17 | 2019-07-17 | Power-down protection circuit for data card |
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| CN (1) | CN210225052U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112152312A (en) * | 2020-11-24 | 2020-12-29 | 北京理工大学深圳汽车研究院(电动车辆国家工程实验室深圳研究院) | Power supply delay holding circuit and device |
| CN112152310A (en) * | 2020-08-05 | 2020-12-29 | 杭州中威电子股份有限公司 | Device for reporting and protecting equipment in power failure |
-
2019
- 2019-07-17 CN CN201921123619.6U patent/CN210225052U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112152310A (en) * | 2020-08-05 | 2020-12-29 | 杭州中威电子股份有限公司 | Device for reporting and protecting equipment in power failure |
| CN112152312A (en) * | 2020-11-24 | 2020-12-29 | 北京理工大学深圳汽车研究院(电动车辆国家工程实验室深圳研究院) | Power supply delay holding circuit and device |
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