CN218584971U

CN218584971U - Electric leakage detection circuit of Micro SD card

Info

Publication number: CN218584971U
Application number: CN202222104576.5U
Authority: CN
Inventors: 洪汉辉
Original assignee: Shenzhen Innios Technology Co ltd
Current assignee: Shenzhen Innios Technology Co ltd
Priority date: 2022-08-10
Filing date: 2022-08-10
Publication date: 2023-03-07
Anticipated expiration: 2032-08-10

Abstract

The utility model discloses a leakage detection circuit of Micro SD card, including Micro SD card, SD card control circuit, computer terminal USB seat, current detection circuit and display circuit, micro SD card and SD card control circuit are connected, and SD card control circuit is connected with computer terminal USB seat, and current detection circuit is connected with Micro SD card and SD card control circuit respectively, and display circuit and current detection circuit are connected. The utility model discloses a SD card control circuit through reading the Micro SD card and with the communication of computer terminal, current detection circuit can change at the monitoring current size on the Micro SD card power supply line to give MCU chip U3 with electric current numerical value transmission and handle, MCU chip U3 shows on transmitting the display chip U4 with the electric current numerical value that obtains, thereby judges whether this Micro SD card has the electric leakage problem.

Description

Electric leakage detection circuit of Micro SD card

Technical Field

The utility model relates to a storage card technical field, concretely relates to electric leakage detection circuit of Micro SD card.

Background

The Micro SD card is a very small flash memory card which is mainly used in mobile phones, but has been used in GPS devices, portable music players and some flash memory disks due to its small size and increasing storage capacity. The Micro SD card is the smallest memory card at present, and can be connected into an SD card slot through an SD adapter card for use.

Most of Micro SD cards provided by suppliers in the existing market are sent to an assembly factory to be assembled into a complete machine without detection before shipment, the problem that part of machines have large dormant current is found only when the complete machine is detected in subsequent sampling, and the Micro SD cards are mainly found to have heating phenomena due to more leakage current and even part of the Micro SD cards through machine disassembly inspection, so that the portable small-sized Micro SD card leakage detection circuit is necessary to solve the problem of leakage current of the existing Micro SD cards.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a convenient quick, small-size portable Micro SD card electric leakage detection circuitry aims at improving the product quality in the actual production application, solves the electric leakage problem of Micro SD card.

To achieve the purpose, the utility model adopts the following technical proposal:

the electric leakage detection circuit of the Micro SD card comprises the Micro SD card, an SD card control circuit, a computer terminal USB seat, a current detection circuit and a display circuit, wherein the Micro SD card is connected with the SD card control circuit, the SD card control circuit is connected with the computer terminal USB seat, the current detection circuit is respectively connected with the Micro SD card and the SD card control circuit, and the display circuit is connected with the current detection circuit.

As a preferred scheme of the leakage detection circuit of the Micro SD card, the SD card control circuit comprises a main control chip U1, a resistor R1, a diode D1, a capacitor C1 and a capacitor C2, an external power supply outputs a stable power supply after being filtered by being connected with the capacitor C1 and the capacitor C2 in parallel,

ends

2, 3, 4, 5, 6 and 7 of the main control chip U1 are respectively connected with

ends

8, 7, 5, 3, 2 and 1 of the Micro SD card in a one-to-one correspondence manner, ends 9 of the main control chip U1 are sequentially connected with the resistor R1 and the diode D1, the diode D1 is connected with the 12 end of the main control chip U1, the 10 end of the main control chip U1 is connected with the A4 end and the B9 end of the computer terminal USB seat in parallel, the 15 end of the main control chip U1 is connected with the A6 end and the B6 end of the computer terminal USB seat in parallel, the 16 end of the main control chip U1 is connected with the A7 end and the B7 end of the computer terminal USB seat in parallel, the 9 end and the 13 end of the main control chip U1 are both connected with the stable power supply, and the 1 end and the 14 end of the main control chip U1, the A1 end, the A13 end, the A14 end, the A15 end, the A16 end and the B12 end of the computer terminal USB seat are all grounded.

As a preferred scheme of the leakage detection circuit of the Micro SD card, the current detection circuit comprises a current detection amplifier U2, a resistor R2 and a capacitor C3, wherein the end 3 of the current detection amplifier U2 is connected with the end 4 of the Micro SD card after being connected with the resistor R2 in parallel, the end 4 of the current detection amplifier U2 is connected with the end 8 of the main control chip U1 after being connected with the resistor R2 in parallel, the end 5 of the current detection amplifier U2 is connected with the capacitor C3, the capacitor C3 is connected with the end 6 of the current detection amplifier U2 after being connected with the end B9 of the USB seat of the computer terminal in parallel, and the end 2, the end 5 and the capacitor C3 of the current detection amplifier U2 are all grounded.

As an optimal scheme of the leakage detection circuit of the Micro SD card, the display circuit comprises an MCU chip U3 and a display chip U4, wherein a15 end of the MCU chip U3 is connected with a1 end of the current detection amplifier U2, 18, 19, 20, 21 and 23 ends of the MCU chip U3 are correspondingly connected with 6, 5, 7, 4 and 3 ends of the display chip U4, 7, 9, 10, 12, 17, 24 and 31 ends of the MCU chip U3, and 2 ends of the display chip U4 are all connected with the stable power supply, and the 1 end of the display chip U4 is grounded.

As a preferred scheme of the electric leakage detection circuit of the Micro SD card, the main control chip U1 is GL823K-SSOP16.

As a preferable scheme of the electric leakage detection circuit of the Micro SD card, the current detection amplifier U2 is INA181-SOT23-6.

As a preferable scheme of the leakage detection circuit of the Micro SD card, the MCU chip U3 is AIR101.

As a preferable scheme of the electric leakage detection circuit of the Micro SD card, the display chip U4 is OLED-0.96INCH.

The utility model has the advantages that: the utility model discloses mainly by the Micro SD card, SD card control circuit, computer terminal USB seat, current detection circuit and several parts of display circuit are constituteed, when the Micro SD card inserts, SD card master control chip U1 can read and the carry Micro SD card, and communicate with computer terminal, make computer terminal can read the Micro SD card, this route is through SD mode communication, when SD card master control chip U1 reads and the carry, current detection circuit can change at the on-line monitoring current size of Micro SD card power supply, and handle current value for MCU chip U3 through ADC mouth transmission, MCU chip U3 shows on transmitting the display chip U4 with the current value that obtains, judge whether this Micro SD card has the electric leakage problem through the current size of monitoring Micro SD card when the carry. The utility model has the advantages of simple and practical, small and exquisite portable, long service life can detect Micro SD card fast, and the product quality who has avoided the accessory to lead to is bad, and it is long when having prolonged the product and using.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be obtained from these drawings without inventive effort.

Fig. 1 is a schematic circuit diagram of a leakage detecting circuit of a Micro SD card according to an embodiment of the present invention.

Fig. 2 is a schematic circuit diagram of an SD card control circuit according to an embodiment of the present invention.

Fig. 3 is a schematic circuit diagram of a Micro SD card according to an embodiment of the present invention.

Fig. 4 is a schematic circuit diagram of a USB socket of a computer terminal according to an embodiment of the present invention.

Fig. 5 is a schematic circuit diagram of a current detection circuit according to an embodiment of the present invention.

Fig. 6 is a circuit diagram of a display circuit according to an embodiment of the present invention.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate an orientation or a positional relationship based on the orientation or the positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but not for indicating or implying that the device or the element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore the terms describing the positional relationship in the drawings are only used for illustrative purposes and should not be construed as limitations of the present patent, and specific meanings of the above terms can be understood according to specific situations by those of ordinary skill in the art.

In the description of the present invention, unless otherwise explicitly specified or limited, the term "connected" or the like, if appearing to indicate a connection relationship between components, is to be understood broadly, for example, as being a fixed connection, a detachable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through one or more other components or may be in an interactive relationship with one another. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in FIG. 1, the utility model provides a Micro SD card's electric leakage detection circuit, including Micro SD card, SD card control circuit, computer terminal USB seat, current detection circuit and display circuit, micro SD card and SD card control circuit are connected, and SD card control circuit is connected with computer terminal USB seat, and current detection circuit is connected with Micro SD card and SD card control circuit respectively, and display circuit and current detection circuit are connected.

As shown in fig. 2-4, the SD card control circuit includes a main control chip U1, a resistor R1, a diode D1, a capacitor C1 and a capacitor C2, an external power source outputs a stable power source after being filtered in parallel with the capacitor C1 and the capacitor C2,

ends

2, 3, 4, 5, 6 and 7 of the main control chip U1 are respectively connected with

ends

8, 7, 5, 3, 2 and 1 of the Micro SD card in a one-to-one correspondence manner, end 9 of the main control chip U1 is connected with the resistor R1 and the diode D1 in sequence, the diode D1 is connected with end 12 of the main control chip U1, the end 10 of the main control chip U1 is connected with the end A4 and the end B9 of the computer terminal USB seat in parallel, the end 15 of the main control chip U1 is connected with the end A6 and the end B6 of the computer terminal USB seat in parallel, the end 16 of the main control chip U1 is connected with the end A7 and the end B7 of the computer terminal USB seat in parallel, the end 9 and the end 13 of the main control chip U1 are both connected with a stable power supply, and the end 1 and the end 14 of the main control chip U1, the end A13, the end A14, the end A15, the end A16 and the end B12 of the computer terminal USB seat are all grounded.

As shown in fig. 5, the current detection circuit includes a current detection amplifier U2, a resistor R2 and a capacitor C3, the end 3 of the current detection amplifier U2 is connected to the end 4 of the Micro SD card after being connected in parallel with the resistor R2, the end 4 of the current detection amplifier U2 is connected to the end 8 of the main control chip U1 after being connected in parallel with the resistor R2, the end 5 of the current detection amplifier U2 is connected to the capacitor C3, the capacitor C3 is connected to the end B9 of the USB socket of the computer terminal after being connected in parallel with the end 6 of the current detection amplifier U2, and the end 2, the end 5 and the capacitor C3 of the current detection amplifier U2 are all grounded.

As shown in fig. 6, the display circuit includes an MCU chip U3 and a display chip U4, the 15 terminal of the MCU chip U3 is connected to the 1 terminal of the current detection amplifier U2, the 18 terminal of the MCU chip U3, the 19 terminal, the 20 terminal, the 21 terminal and the 23 terminal are connected to the 6 terminal of the display chip U4, the 5 terminal, the 7 terminal, the 4 terminal and the 3 terminal are connected in a one-to-one correspondence manner, the 7 terminal of the MCU chip U3, the 9 terminal, the 10 terminal, the 12 terminal, the 17 terminal, the 24 terminal and the 31 terminal, the 2 terminals of the display chip U4 are connected to the stable power supply, and the 1 terminal of the display chip U4 is grounded.

Preferably, the main control chip U1 of the present embodiment is GL823K-SSOP16.

Preferably, the current sense amplifier U2 of the present embodiment is INA181-SOT23-6.

Preferably, the MCU chip U3 of this embodiment is AIR101.

Preferably, the display chip U4 of the present embodiment is an OLED-0.96INCH.

Preferably, the resistance values of the resistor R1 and the resistor R2 of the present embodiment are both 1K.

Preferably, the capacitance of the capacitor C1 of the present embodiment is 2.2uF, and the capacitances of the capacitor C2 and the capacitor C3 are both 100nF.

The utility model discloses mainly by the Micro SD card, SD card control circuit, computer terminal USB seat, current detection circuit and several parts of display circuit are constituteed, when the Micro SD card inserts, SD card master control chip U1 can read and the carry Micro SD card, and communicate with computer terminal, make computer terminal can read the Micro SD card, this route is through SD mode communication, when SD card master control chip U1 reads and the carry, current detection circuit can change at the on-line monitoring current size of Micro SD card power supply, and handle current value for MCU chip U3 through ADC mouth transmission, MCU chip U3 shows on transmitting the display chip U4 with the current value that obtains, judge whether this Micro SD card has the electric leakage problem through the current size of monitoring Micro SD card when the carry. The utility model has the advantages of simple and practical, small and exquisite portable, long service life can detect Micro SD card fast, and the product quality who has avoided the accessory to lead to is bad, and it is long when having prolonged the product and using.

It should be understood that the above-described embodiments are merely illustrative of the preferred embodiments of the present invention and the technical principles thereof. It will be understood by those skilled in the art that various modifications, equivalents, changes, and the like can be made to the present invention. However, these modifications are within the scope of the present invention as long as they do not depart from the spirit of the present invention. In addition, certain terms used in the specification and claims of the present application are not limiting, but are used merely for convenience of description.

Claims

1. The electric leakage detection circuit of the Micro SD card is characterized by comprising the Micro SD card, an SD card control circuit, a computer terminal USB seat, a current detection circuit and a display circuit, wherein the Micro SD card is connected with the SD card control circuit, the SD card control circuit is connected with the computer terminal USB seat, the current detection circuit is respectively connected with the Micro SD card and the SD card control circuit, and the display circuit is connected with the current detection circuit.

2. The electric leakage detection circuit of a Micro SD card according to claim 1, wherein the SD card control circuit includes a main control chip U1, a resistor R1, a diode D1, a capacitor C1 and a capacitor C2, an external power source outputs a stable power source after being filtered by being connected in parallel with the capacitor C1 and the capacitor C2, the main control chip U1 is GL823K-SSOP16, and the ends 2, 3, 4, 5, 6 and 7 of the main control chip U1 are respectively connected with the ends 8, 7, 5, 3, 2 and 1 of the Micro SD card in a one-to-one correspondence manner, and the end 9 of the main control chip U1 is sequentially connected with the resistor R1 and the diode D1, diode D1 with main control chip U1's 12 end is connected, main control chip U1's 10 end with the A4 end and the B9 end of computer terminal USB seat are parallelly connected, main control chip U1's 15 end with the A6 end and the B6 end of computer terminal USB seat are parallelly connected, main control chip U1's 16 end with the A7 end and the B7 end of computer terminal USB seat are parallelly connected, main control chip U1's 9 ends and 13 end all with stable power connects, main control chip U1's 1 end and 14 end the A1 end, A13 end, A14 end, A15 end, A16 end and B12 end of computer terminal USB seat all ground connection.

3. The Micro SD card leakage detection circuit according to claim 2, wherein the current detection circuit comprises a current detection amplifier U2, a resistor R2 and a capacitor C3, the current detection amplifier U2 is INA181-SOT23-6, and the 3 ends of the current detection amplifier U2 are connected with the 4 ends of the Micro SD card after being connected in parallel with the resistor R2, the 4 ends of the current detection amplifier U2 are connected with the 8 ends of the main control chip U1 after being connected in parallel with the resistor R2, the 5 ends of the current detection amplifier U2 are connected with the capacitor C3, the capacitor C3 is connected with the B9 end of the computer terminal USB socket after being connected in parallel with the 6 ends of the current detection amplifier U2, and the 2 ends, the 5 ends and the capacitor C3 of the current detection amplifier U2 are all grounded.

4. The Micro SD card leakage detection circuit according to claim 3, wherein the display circuit includes an MCU chip U3 and a display chip U4, the MCU chip U3 is AIR101, the display chip U4 is OLED-0.96INCH, the 15 terminal of the MCU chip U3 is connected with the 1 terminal of the current detection amplifier U2, the 18, 19, 20, 21 and 23 terminals of the MCU chip U3 are connected with the 6, 5, 7, 4 and 3 terminals of the display chip U4 in a one-to-one correspondence manner, the 7, 9, 10, 12, 17, 24 and 31 terminals of the MCU chip U3, the 2 terminal of the display chip U4 are all connected with the stable power supply, and the 1 terminal of the display chip U4 is grounded.