CN109524940B - Electronic overcurrent over-temperature data line protection device - Google Patents

Electronic overcurrent over-temperature data line protection device Download PDF

Info

Publication number
CN109524940B
CN109524940B CN201710872877.3A CN201710872877A CN109524940B CN 109524940 B CN109524940 B CN 109524940B CN 201710872877 A CN201710872877 A CN 201710872877A CN 109524940 B CN109524940 B CN 109524940B
Authority
CN
China
Prior art keywords
resistor
triode
pole
pin
diode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201710872877.3A
Other languages
Chinese (zh)
Other versions
CN109524940A (en
Inventor
翟晓君
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Keter New Materials Co ltd
SHANGHAI SHENWO ELECTRONICS CO Ltd
Original Assignee
SHANGHAI SHENWO ELECTRONICS CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SHANGHAI SHENWO ELECTRONICS CO Ltd filed Critical SHANGHAI SHENWO ELECTRONICS CO Ltd
Priority to CN201710872877.3A priority Critical patent/CN109524940B/en
Publication of CN109524940A publication Critical patent/CN109524940A/en
Application granted granted Critical
Publication of CN109524940B publication Critical patent/CN109524940B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
    • H02H3/081—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current and depending on the direction
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02—Details
    • H02H3/06—Details with automatic reconnection
    • H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
    • H02H3/087—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current for dc applications
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
    • H02H5/041—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature additionally responsive to excess current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
    • H02H5/042—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature using temperature dependent resistors

Abstract

An electronic overcurrent over-temperature data line protection device for protecting data lines of different voltage levels. The protection state of the data line is controlled by detecting the current in the data line in real time and dividing the current into three sections of delay time according to the current, comparing and amplifying current feedback signals, the temperature of the plug of the data line is synchronously monitored, an electric product is protected from being damaged by overcurrent, short circuit and plug overtemperature in the working process, the electric product scrapping and explosion caused by overcurrent, short circuit and plug overtemperature are avoided, the normal function of restoring the data line to be protected by disconnection and reconnection is realized, and the use safety of the electric product is ensured.

Description

Electronic overcurrent overtemperature data line protection device
Technical Field
The invention relates to a safety device for protecting data lines with different voltage levels, in particular to an electronic overcurrent and overtemperature data line protection device which protects an electrical product from being damaged by overcurrent, short circuit and overtemperature in the working process through a data line and realizes the restoration of the normal function by disconnecting and reconnecting the data line after the data line enters the protection.
Background
At present, a USB data line for charging or data transmission of mobile phones, tablet computers, notebook computers and digital products is known, and mainly is a Type-C connection data line. The protection applied to the plug of the Type-C connection data line is mainly PTC, but the PTC is a heat-sensitive material, is greatly influenced by the environmental temperature, is slow in protection action time, has large internal resistance change after multiple actions, and is unstable when the environmental temperature is higher, the holding current of the PTC is reduced, the passing current of the data line is influenced, and the PTC is difficult to achieve a high-voltage and high-current product at present. At present, no data line protection integrated IC device which passes large current, has high voltage resistance, quick action time, is not influenced by environmental temperature, has no change of internal resistance after being used for a plurality of times for a long time and is suitable for different voltage grades exists.
Disclosure of Invention
In order to overcome the defects that the conventional data line internal protection device is influenced by environmental temperature greatly, has slow protection action time, increases internal resistance after multiple actions, reduces the holding current, influences the passing current of a data line, is unstable and is difficult to realize high-voltage and high-current products, the invention provides the electronic overcurrent and overtemperature data line protection device which is not only suitable for charging or data transmission of mobile phones, tablet computers, notebook computers and digital products, replaces a Type-C connection data line internal protection device, but also is not influenced by the environmental temperature, has high action speed, does not change internal resistance, keeps constant through rated current, has stable and reliable temperature protection, has overcurrent, short circuit and overtemperature protection functions, can restore normal functions by disconnection and reconnection after protection, and has the action life of 10 ten thousand times.
The technical scheme adopted by the invention for solving the technical problems is as follows: in the protection device, the current flowing from the terminal 1 to the terminal 2 is called forward current, the current flowing from the terminal 2 to the terminal 1 is called reverse current, the terminal 3 is grounded, the pins 2 and 3 of the comparison amplifier IC3-1 are used for comparing and detecting a section of forward primary overload current, the pins 2 and 3 of the comparison amplifier IC4-1 are used for comparing and detecting a section of reverse primary overload current, the pins 5 and 6 of the comparison amplifier IC3-2 are used for comparing and detecting a section of forward high-level overload current, the pins 5 and 6 of the comparison amplifier IC4-2 are used for comparing and detecting a section of reverse high-level overload current, the pins 9 and 10 of the comparison amplifier IC3-3 are used for comparing and detecting a section of forward short-circuit current, and the pins 9 and 10 of the comparison amplifier IC4-3 are used for comparing and detecting a section of reverse short-circuit current; when detecting primary overload current in forward or reverse direction, the circuit of the comparison amplifier IC3-1 or the comparison amplifier IC4-1 is overturned, pin 1 of the comparison amplifier IC3-1 or the comparison amplifier IC4-1 outputs high potential, the reset of the binary counter IC2 is relieved through the triodes V10, V2 and V1, the binary counter IC2 starts timing, the timing output loop is communicated through the triodes V7 and V4, the timing time is up, the G pole potential of the MOSFET tube Q2 or Q1 is pulled down through the conduction of the triodes V24 and V20 or the triodes V22 and V18, and the MOSFET tube is cut off to cut off the power supply loop; when high-level overload current is detected in the forward direction or the reverse direction, the circuit of the comparison amplifier IC3-2 or the comparison amplifier IC4-2 is turned over, the pin 7 of the comparison amplifier IC3-2 or the comparison amplifier IC4-2 outputs high potential, the reset of the binary counter IC2 is released through the triodes V11, V2 and V1, the binary counter IC2 starts timing, the timing output loop is communicated through the triodes V8 and V5, the timing time is up, the G pole potential of the MOSFET tube Q2 or Q1 is pulled down through the conduction of the triodes V24 and V20 or the triodes V22 and V18, and the MOSFET tube is cut off to cut off the power supply loop; when short-circuit current is detected in the forward direction or the reverse direction, the circuit of the comparison amplifier IC3-3 or the comparison amplifier IC4-3 is turned over, the pin 8 of the comparison amplifier IC3-3 or the comparison amplifier IC4-3 outputs high potential, the binary counter IC2 is released from resetting through the triodes V12, V2 and V1, the binary counter IC2 starts timing, the timing output loop is communicated through the triodes V9 and V6, the timing time is up, the G pole potential of the MOSFET tube Q2 or Q1 is pulled down through the triodes V24 and V20 or the triodes V22 and V18, and the MOSFET tube is cut off to cut off the power supply loop. The time-base circuit IC1 forms a high-frequency oscillator, and forms a voltage doubling circuit through D1, D2, C3 and C4 to supply power to the N-channel MOSFET Q1 and Q2. The phase of the comparison amplifier IC3-4 is judged, the forward current is judged, the 14 feet of the comparison amplifier IC3-4 output high potential, the triodes V13, V16, V21 and V17 are conducted, the b pole of the triode V18 is in high potential, the MOSFET tube Q1 is ensured to be always in a conducting state, and the MOSFET tube Q2 is controlled during the forward current; and (3) outputting a low potential by a pin 14 of the comparison amplifier IC3-4, stopping the triodes V13 and V14, and conducting the triodes V15 and V23 and V19 to ensure that a b pole of the triode V20 is in a high potential, so that the MOSFET Q2 is always in a conducting state, and the MOSFET Q1 is controlled during reverse current. Comparing and detecting the potentials of pins 12 and 13 of the comparison amplifier IC4-4, when the temperature rises, reducing the resistance value of the thermistor Rt, turning over a pin 14 of the comparison amplifier IC4-4 to output high potential, and when forward current flows, conducting the triode V24 and the V20 to pull down the potential of the G electrode of the MOSFET Q2, cutting off the MOSFET Q2, and disconnecting the power supply loop; when the current is reversed, the triode V22 and the triode V18 are conducted, the G pole potential of the MOSFET Q1 is pulled down, the MOSFET Q1 is cut off, and the power supply loop is disconnected.
The invention has the advantages that the electric appliance product is protected from being damaged by overcurrent, short circuit and plug overtemperature in the working process, the electric appliance product scrapping and explosion caused by overcurrent, short circuit and plug overtemperature are avoided, the normal function of the electric appliance product is restored by disconnecting and reconnecting after the data line enters the protection state, and the use safety of the electric appliance product is ensured.
Drawings
The invention is further illustrated by the following examples in conjunction with the drawings.
The attached drawing is a circuit schematic diagram of the invention
The attached drawings are as follows: 1. 2 and 3 terminals, R1-R57 resistors, RP 1-RP9 adjustable resistors, rt thermistors, C1-C6 capacitors, D1-D13 diodes, ZD 1-ZD 3 Zener diodes, V1-V24 triodes, Q1, Q2 MOSFET tubes, IC1 time base circuit, IC2 binary counter, IC 3-1-IC 3-4, IC 4-1-IC 4-4 comparative amplifier.
Detailed Description
In the figure, a terminal 1, a pole C of a triode V18, a pole S of a MOSFET Q1, a pin 1 at the fixed end of an adjustable resistor RP1 are connected with one end of a resistor R32, a pole D of the MOSFET Q1, a cathode of a voltage stabilizing diode ZD1, one end of the resistor R1, a pin 8 of a time-base circuit IC1, a pin 4 of the time-base circuit IC1, an anode of a diode D1, one end of a capacitor C4, an anode of a diode D3, one end of a resistor R42, one end of a resistor R43, one end of a resistor R44, a cathode of a diode D10, one end of a resistor R45, one end of a resistor R46, one end of a resistor R47, and an anode of a voltage stabilizing diode ZD3 are connected with the pole D of a transistor Q2, a pole G of the MOSFET Q1 and a pole e of the triode V18 are connected with one end of a resistor R38, a pole b of the triode V18, one end of the resistor R37, a pole C of the triode V17 and a pole C of a resistor R41, a pole G of the MOSFET Q2, a triode V20 and a triode V20 are connected with one end of a triode R39, the e pole of the triode V19, the other end of the resistor R40, the other end of the resistor R39, the cathode of the voltage-stabilizing diode ZD3, the other end of the resistor R38, the other end of the resistor R37, the e pole of the triode V17 and one end of the resistor R4 are connected, the other end of the resistor R4 and the other end of the capacitor C4 are connected with the cathode of the diode D2, the anode of the diode D2 and the cathode of the diode D1 are connected with one end of the capacitor C3, the other end of the capacitor C3 is connected with the pin 3 of the time-base circuit IC1, the pin 7 of the time-base circuit IC1 and the other end of the resistor R1 are connected with one end of the resistor R2, the other end of the resistor R2, the pin 2 of the time-base circuit IC1 and the pin 6 of the time-base circuit IC1 are connected with one end of the capacitor C1, the other end of the capacitor C1, the anode of the voltage-stabilizing diode 1, the pin 1 of the time-base circuit IC1 and one end of the resistor R3 are connected with one end of the pin 5 of the capacitor C2, the cathode of the diode ZD3 is connected with one end of the resistor R5, the other end of the resistor R5, the negative electrode of the voltage-stabilizing diode ZD2, the e pole of the triode V1, the e pole of the triode V2, the 16 pin of the binary counter IC2, one end of the capacitor C6, one end of the resistor R11, the 4 pin of the comparison amplifier IC3-4, the e pole of the triode V14, the e pole of the triode V15, the e pole of the triode V16, the 4 pin of the comparison amplifier IC4-1, and one end of the resistor R30 are connected with the fixed end 1 pin of the adjustable resistor RP3, the adjustable end 2 pin of the adjustable resistor RP1 and the negative electrode of the diode D4 are connected with the 12 pin of the comparison amplifier IC3-4, the pin 13 of the comparison amplifier IC3-4 is connected with the adjustable end 2 pin of the adjustable resistor RP2, the pin 14 of the comparison amplifier IC3-4 and the positive electrode of the diode D4 are connected with one end of the resistor R24, the other end of the resistor R24 is connected with the b pole of the triode V13, the C pole of the triode V13, one end of the resistor R25 is connected with one end of the resistor R26, and the other end of the resistor R25 is connected with the b pole of the triode V16, the C pole of the triode V16 is connected with one end of a resistor R28, the other end of the resistor R28 is connected with the b pole of the triode V21, the C pole of the triode V21 is connected with one end of a resistor R34, the other end of the resistor R34 is connected with the b pole of the triode V17, the other end of the resistor R26 is connected with the b pole of the triode V14, the C pole of the triode V14 and the b pole of the triode V15 are connected with one end of a resistor R27, the C pole of the triode V15 is connected with one end of a resistor R29, the other end of the resistor R29 is connected with the b pole of the triode V23, the C pole of the triode V23 is connected with one end of a resistor R55, the other end of the resistor R55 is connected with the b pole of the triode V19, the pin 1 at the fixed end of the adjustable resistor RP2, the S pole of the MOSFET Q2, the C pole of the triode V20 and the terminal 2 are connected with one end of a resistor R56, the C pole of the transistor V1 and the pin 12 of the binary counter IC2 are connected with one end of the resistor R6, the b pole of the triode V1, the C pole of the triode V2 is connected with one end of a resistor R7, the pin 11 of the binary counter IC2 is connected with one end of a resistor R8, the other end of the resistor R8, one end of a resistor R9 and one end of a capacitor C5 are connected with the C pole of the triode V3, the b pole of the triode V3 is connected with one end of a resistor R10, the other end of the resistor R10, the C pole of the triode V4, the C pole of the triode V5 and the C pole of the triode V6 are connected with the anode of a diode D5, the other end of the resistor R9 is connected with the pin 10 of the binary counter IC2, the pin 9 of the binary counter IC2 is connected with the other end of the capacitor C5, the pin 3 of the binary counter IC2 is connected with the e pole of the triode V4, the b pole of the triode V4 is connected with one end of a resistor R12, the other end of the resistor R12 is connected with the C pole of the triode V7, the b pole of the triode V7 is connected with one end of a resistor R19, the pin 6 of the binary counter IC2 is connected with the e pole of the triode V5, the b pole of the binary counter V5 is connected with one end of a resistor R13, the other end of the resistor R13 is connected with the C pole of the triode V8, the b pole of the triode V8 is connected with one end of the resistor R21, the pin 7 of the binary counter IC2 is connected with the e pole of the triode V6, the b pole of the triode V6 is connected with one end of the resistor R14, the other end of the resistor R14 is connected with the C pole of the triode V9, the b pole of the triode V9 is connected with one end of the resistor R23, the b pole of the triode V2, the other end of the resistor R11, one end of the resistor R15 and one end of the resistor R16 are connected, the other end of the resistor R15 is connected with the C pole of the triode V10, the b pole of the triode V10 is connected with one end of the resistor R18, the other end of the resistor R16 is connected with the C pole of the triode V11, the b pole of the triode V11 is connected with one end of the resistor R20, the other end of the resistor R17 is connected with the C pole of the triode V12, the b pole of the V12 is connected with one end of the resistor R22, the other end of the resistor R18, the negative pole of the diode D6, the diode D6 and the negative pole of the diode D6, the other end of the resistor R19 is connected with the cathode of a diode D11, the other end of the resistor R20, the cathode of a diode D7 and the other end of the resistor R21 are connected with the cathode of a diode D12, the other end of the resistor R22, the cathode of a diode D8 and the other end of the resistor R23 are connected with the cathode of a diode D13, the anode of a diode D6 is connected with a pin 1 of a comparison amplifier IC4-1, a pin 2 of the comparison amplifier IC4-1, the other end of a resistor R32, a pin 6 of the comparison amplifier IC4-2 and a pin 9 of the comparison amplifier IC4-3 are connected with one end of a resistor R33, a pin 3 of the comparison amplifier IC4-1 is connected with a pin 2 of an adjustable end of an adjustable resistor RP4, the anode of a diode D7 is connected with a pin 7 of the comparison amplifier IC4-2, a pin 5 of the comparison amplifier IC4-2 is connected with a pin 2 of an adjustable end of an adjustable resistor RP5, the anode of a diode D8 is connected with a pin 8 of the comparison amplifier IC4-3, a pin 10 of a comparison amplifier IC4-3 is connected with a pin 2 of an adjustable end RP6, the anode of a diode D11 is connected with a pin 1 of a comparison amplifier IC3-1, a pin 2 of the comparison amplifier IC3-1, the other end of a resistor R56, a pin 6 of the comparison amplifier IC3-2 and a pin 9 of the comparison amplifier IC3-3 are connected with one end of a resistor R57, a pin 3 of the comparison amplifier IC3-1 is connected with a pin 2 of an adjustable end RP7 of the adjustable resistor RP7, the anode of a diode D12 is connected with a pin 7 of the comparison amplifier IC3-2, a pin 5 of the comparison amplifier IC3-2 is connected with a pin 2 of an adjustable end RP8 of the adjustable resistor RP8, the anode of a diode D13 is connected with a pin 8 of the comparison amplifier IC3-3, a pin 10 of the comparison amplifier IC3-3 is connected with a pin 2 of an adjustable end RP9, the cathode of a diode D5, the cathode of a diode D9 and one end of a resistor R35 are connected with one end of a resistor R36, the other end of the resistor R35 is connected with the b pole of the triode V22, the c pole of the triode V22 is connected with the other end of the resistor R41, the other end of the resistor R36 is connected with the b pole of the triode V24, the c pole of the triode V24 is connected with the other end of the resistor R48, the anode of the diode D9 is connected with the 14 pin of the comparison amplifier IC4-4, the 12 pin of the comparison amplifier IC4-4 and the other end of the resistor R30 are connected with one end of the resistor R31, the 13 pin of the comparison amplifier IC4-4, the adjustable end 2 pin of the adjustable resistor RP3 and the fixed end 3 pin of the adjustable resistor RP3 are connected with one end of the thermistor Rt, the other end of the resistor R42 is connected with the fixed end 1 pin of the adjustable resistor RP4, the fixed end 3 pin of the adjustable resistor RP4 is connected with one end of the resistor R53, the other end of the resistor R43 is connected with the fixed end 1 pin of the adjustable resistor RP5, the fixed end 3 pin of the adjustable resistor RP5 is connected with one end of the resistor R49, the other end of the resistor R44 is connected with the fixed end 1 pin of the fixed end of the adjustable resistor RP6, the pin 3 of the fixed end of the adjustable resistor RP6 is connected with one end of the resistor R50, the other end of the resistor R45 is connected with the pin 1 of the fixed end of the adjustable resistor RP9, the pin 3 of the fixed end of the adjustable resistor RP9 is connected with one end of the resistor R51, the other end of the resistor R46 is connected with the pin 1 of the fixed end of the adjustable resistor RP8, the pin 3 of the fixed end of the adjustable resistor RP8 is connected with one end of the resistor R52, the other end of the resistor R47 is connected with the pin 1 of the fixed end of the adjustable resistor RP7, the pin 3 of the fixed end of the adjustable resistor RP7 is connected with one end of the resistor R54, the other end of the resistor R3, the anode of the voltage stabilizing diode ZD2, the pin 3 of the fixed end of the adjustable resistor RP1, the pin 11 of the comparison amplifier IC3-4, the e pole of the triode V13, the other end of the resistor R27, the e pole of the triode V21, the other end of the resistor R49, the other end of the resistor R50, the anode of the diode D10, the other end of the resistor R51, the other end of the resistor R52, the e pole of the triode V23, the triode V pole of the resistor R23, the other end of the resistor R6, the other end of the resistor R7, the e pole of the triode V3, the 8 pin of the binary counter IC2, the other end of the capacitor C6, the e pole of the triode V7, the e pole of the triode V8, the e pole of the triode V10, the e pole of the triode V11, the e pole of the triode V9, the e pole of the triode V12, the 11 pin of the comparison amplifier IC4-4, the other end of the resistor R31, the other end of the thermistor Rt, the other end of the resistor R33, the e pole of the triode V22, the other end of the resistor R53, the terminal 3, the other end of the resistor R54 and the e pole of the triode V24 are connected with the other end of the resistor R57.

Claims (1)

1. An electronic overcurrent over-temperature data line protection device, in the protection device, current flowing from terminal 1 to terminal 2 is called forward current, current flowing from terminal 2 to terminal 1 is called reverse current, terminal 3 is grounded, 2 and 3 pins of comparison amplifier IC3-1 are used for comparing and detecting a section of forward primary overload current, 2 and 3 pins of comparison amplifier IC4-1 are used for comparing and detecting a section of reverse primary overload current, 5 and 6 pins of comparison amplifier IC3-2 are used for comparing and detecting a section of forward high-level overload current, 5 and 6 pins of comparison amplifier IC4-2 are used for comparing and detecting a section of reverse high-level overload current, 9 and 10 pins of comparison amplifier IC3-3 are used for comparing and detecting a section of forward short-circuit current, and 9 and 10 pins of comparison amplifier IC4-3 are used for comparing and detecting a section of reverse short-circuit current, is characterized in that: a terminal 1, a C electrode of a triode V18, an S electrode of a MOSFET Q1, a pin 1 at the fixed end of an adjustable resistor RP1 are connected with one end of a resistor R32, a D electrode of the MOSFET Q1, a cathode of a zener diode ZD1, one end of a resistor R1, 8 pins of a time-base circuit IC1, 4 pins of the time-base circuit IC1, an anode of a diode D1, one end of a capacitor C4, an anode of a diode D3, one end of a resistor R42, one end of a resistor R43, one end of a resistor R44, a cathode of a diode D10, one end of a resistor R45, one end of a resistor R46, one end of a resistor R47, an anode of the zener diode ZD3 are connected with a D electrode of a MOSFET Q2, a G electrode of the MOSFET Q1, an e electrode of a triode V18 are connected with one end of a resistor R38, a b electrode of the triode V18, one end of the resistor R37, a C electrode of a triode V17 are connected with one end of a resistor R41, a G electrode of the MOSFET Q2, an e electrode of the triode V20 is connected with one end of a resistor R39, a b electrode of the triode V20, one end of a resistor R40, a resistor R19, the e pole of the triode V19, the other end of the resistor R40, the other end of the resistor R39, the cathode of the voltage-stabilizing diode ZD3, the other end of the resistor R38, the other end of the resistor R37, the e pole of the triode V17 and one end of the resistor R4 are connected, the other end of the resistor R4 and the other end of the capacitor C4 are connected with the cathode of the diode D2, the anode of the diode D2 and the cathode of the diode D1 are connected with one end of the capacitor C3, the other end of the capacitor C3 is connected with the pin 3 of the time-base circuit IC1, the pin 7 of the time-base circuit IC1 and the other end of the resistor R1 are connected with one end of the resistor R2, the other end of the resistor R2, the pin 2 of the time-base circuit IC1 and the pin 6 of the time-base circuit IC1 are connected with one end of the capacitor C1, the other end of the capacitor C1, the anode of the voltage-stabilizing diode 1, the pin 1 of the time-base circuit IC1 and one end of the resistor R3 are connected with one end of the pin 5 of the capacitor C2, the cathode of the diode ZD3 is connected with one end of the resistor R5, the other end of the resistor R5, the negative electrode of the voltage-stabilizing diode ZD2, the e pole of the triode V1, the e pole of the triode V2, the 16 pin of the binary counter IC2, one end of the capacitor C6, one end of the resistor R11, the 4 pin of the comparison amplifier IC3-4, the e pole of the triode V14, the e pole of the triode V15, the e pole of the triode V16, the 4 pin of the comparison amplifier IC4-1, and one end of the resistor R30 are connected with the fixed end 1 pin of the adjustable resistor RP3, the adjustable end 2 pin of the adjustable resistor RP1 and the negative electrode of the diode D4 are connected with the 12 pin of the comparison amplifier IC3-4, the pin 13 of the comparison amplifier IC3-4 is connected with the adjustable end 2 pin of the adjustable resistor RP2, the pin 14 of the comparison amplifier IC3-4 and the positive electrode of the diode D4 are connected with one end of the resistor R24, the other end of the resistor R24 is connected with the b pole of the triode V13, the C pole of the triode V13, one end of the resistor R25 is connected with one end of the resistor R26, and the other end of the resistor R25 is connected with the b pole of the triode V16, the C pole of the triode V16 is connected with one end of a resistor R28, the other end of the resistor R28 is connected with the b pole of the triode V21, the C pole of the triode V21 is connected with one end of a resistor R34, the other end of the resistor R34 is connected with the b pole of the triode V17, the other end of the resistor R26 is connected with the b pole of the triode V14, the C pole of the triode V14 and the b pole of the triode V15 are connected with one end of a resistor R27, the C pole of the triode V15 is connected with one end of a resistor R29, the other end of the resistor R29 is connected with the b pole of the triode V23, the C pole of the triode V23 is connected with one end of a resistor R55, the other end of the resistor R55 is connected with the b pole of the triode V19, the pin 1 at the fixed end of the adjustable resistor RP2, the S pole of the MOSFET Q2, the C pole of the triode V20 and the terminal 2 are connected with one end of a resistor R56, the C pole of the transistor V1 and the pin 12 of the binary counter IC2 are connected with one end of the resistor R6, the b pole of the triode V1, the C pole of the triode V2 is connected with one end of a resistor R7, the pin 11 of the binary counter IC2 is connected with one end of a resistor R8, the other end of the resistor R8, one end of a resistor R9 and one end of a capacitor C5 are connected with the C pole of the triode V3, the b pole of the triode V3 is connected with one end of a resistor R10, the other end of the resistor R10, the C pole of the triode V4, the C pole of the triode V5 and the C pole of the triode V6 are connected with the anode of a diode D5, the other end of the resistor R9 is connected with the pin 10 of the binary counter IC2, the pin 9 of the binary counter IC2 is connected with the other end of the capacitor C5, the pin 3 of the binary counter IC2 is connected with the e pole of the triode V4, the b pole of the triode V4 is connected with one end of the resistor R12, the other end of the resistor R12 is connected with the C pole of the triode V7, the b pole of the triode V7 is connected with one end of a resistor R19, the pin 6 of the binary counter IC2 is connected with the e pole of the triode V5, the b pole of the resistor R13, the other end of the resistor R13 is connected with the C pole of the triode V8, the b pole of the triode V8 is connected with one end of the resistor R21, the pin 7 of the binary counter IC2 is connected with the e pole of the triode V6, the b pole of the triode V6 is connected with one end of the resistor R14, the other end of the resistor R14 is connected with the C pole of the triode V9, the b pole of the triode V9 is connected with one end of the resistor R23, the b pole of the triode V2, the other end of the resistor R11, one end of the resistor R15 and one end of the resistor R16 are connected with one end of the resistor R17, the other end of the resistor R15 is connected with the C pole of the triode V10, the b pole of the triode V10 is connected with one end of the resistor R18, the other end of the resistor R16 is connected with the C pole of the triode V11, the b pole of the triode V11 is connected with one end of the resistor R20, the other end of the resistor R17 is connected with the C pole of the triode V12, the b pole of the triode V12 is connected with one end of the resistor R22, the other end of the resistor R18, the negative pole of the diode D6, the other end of the resistor R19 is connected with the cathode of a diode D11, the other end of the resistor R20, the cathode of a diode D7 and the other end of the resistor R21 are connected with the cathode of a diode D12, the other end of the resistor R22, the cathode of a diode D8 and the other end of the resistor R23 are connected with the cathode of a diode D13, the anode of a diode D6 is connected with a pin 1 of a comparison amplifier IC4-1, a pin 2 of the comparison amplifier IC4-1, the other end of a resistor R32, a pin 6 of the comparison amplifier IC4-2 and a pin 9 of the comparison amplifier IC4-3 are connected with one end of a resistor R33, a pin 3 of the comparison amplifier IC4-1 is connected with a pin 2 of an adjustable end of an adjustable resistor RP4, the anode of a diode D7 is connected with a pin 7 of the comparison amplifier IC4-2, a pin 5 of the comparison amplifier IC4-2 is connected with a pin 2 of an adjustable end of an adjustable resistor RP5, the anode of a diode D8 is connected with a pin 8 of the comparison amplifier IC4-3, a pin 10 of a comparison amplifier IC4-3 is connected with a pin 2 of an adjustable end RP6, the anode of a diode D11 is connected with a pin 1 of a comparison amplifier IC3-1, a pin 2 of the comparison amplifier IC3-1, the other end of a resistor R56, a pin 6 of the comparison amplifier IC3-2 and a pin 9 of the comparison amplifier IC3-3 are connected with one end of a resistor R57, a pin 3 of the comparison amplifier IC3-1 is connected with a pin 2 of an adjustable end RP7 of the adjustable resistor RP7, the anode of a diode D12 is connected with a pin 7 of the comparison amplifier IC3-2, a pin 5 of the comparison amplifier IC3-2 is connected with a pin 2 of an adjustable end RP8 of the adjustable resistor RP8, the anode of a diode D13 is connected with a pin 8 of the comparison amplifier IC3-3, a pin 10 of the comparison amplifier IC3-3 is connected with a pin 2 of an adjustable end RP9, the cathode of a diode D5, the cathode of a diode D9 and one end of a resistor R35 are connected with one end of a resistor R36, the other end of the resistor R35 is connected with the b pole of the triode V22, the c pole of the triode V22 is connected with the other end of the resistor R41, the other end of the resistor R36 is connected with the b pole of the triode V24, the c pole of the triode V24 is connected with the other end of the resistor R48, the anode of the diode D9 is connected with the 14 pin of the comparison amplifier IC4-4, the 12 pin of the comparison amplifier IC4-4 and the other end of the resistor R30 are connected with one end of the resistor R31, the 13 pin of the comparison amplifier IC4-4, the adjustable end 2 pin of the adjustable resistor RP3 and the fixed end 3 pin of the adjustable resistor RP3 are connected with one end of the thermistor Rt, the other end of the resistor R42 is connected with the fixed end 1 pin of the adjustable resistor RP4, the fixed end 3 pin of the adjustable resistor RP4 is connected with one end of the resistor R53, the other end of the resistor R43 is connected with the fixed end 1 pin of the adjustable resistor RP5, the fixed end 3 pin of the adjustable resistor RP5 is connected with one end of the resistor R49, the other end of the resistor R44 is connected with the fixed end 1 pin of the fixed end of the adjustable resistor RP6, the pin 3 of the fixed end of the adjustable resistor RP6 is connected with one end of the resistor R50, the other end of the resistor R45 is connected with the pin 1 of the fixed end of the adjustable resistor RP9, the pin 3 of the fixed end of the adjustable resistor RP9 is connected with one end of the resistor R51, the other end of the resistor R46 is connected with the pin 1 of the fixed end of the adjustable resistor RP8, the pin 3 of the fixed end of the adjustable resistor RP8 is connected with one end of the resistor R52, the other end of the resistor R47 is connected with the pin 1 of the fixed end of the adjustable resistor RP7, the pin 3 of the fixed end of the adjustable resistor RP7 is connected with one end of the resistor R54, the other end of the resistor R3, the anode of the voltage stabilizing diode ZD2, the pin 3 of the fixed end of the adjustable resistor RP1, the pin 11 of the comparison amplifier IC3-4, the e pole of the triode V13, the other end of the resistor R27, the e pole of the triode V21, the other end of the resistor R49, the other end of the resistor R50, the anode of the diode D10, the other end of the resistor R51, the other end of the resistor R52, the e pole of the triode V23, the triode V pole of the resistor R23, the other end of the resistor R6, the other end of the resistor R7, the e pole of the triode V3, the 8 pin of the binary counter IC2, the other end of the capacitor C6, the e pole of the triode V7, the e pole of the triode V8, the e pole of the triode V10, the e pole of the triode V11, the e pole of the triode V9, the e pole of the triode V12, the 11 pin of the comparison amplifier IC4-4, the other end of the resistor R31, the other end of the thermistor Rt, the other end of the resistor R33, the e pole of the triode V22, the other end of the resistor R53, the terminal 3, the other end of the resistor R54 and the e pole of the triode V24 are connected with the other end of the resistor R57.
CN201710872877.3A 2017-09-18 2017-09-18 Electronic overcurrent over-temperature data line protection device Active CN109524940B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710872877.3A CN109524940B (en) 2017-09-18 2017-09-18 Electronic overcurrent over-temperature data line protection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710872877.3A CN109524940B (en) 2017-09-18 2017-09-18 Electronic overcurrent over-temperature data line protection device

Publications (2)

Publication Number Publication Date
CN109524940A CN109524940A (en) 2019-03-26
CN109524940B true CN109524940B (en) 2022-12-13

Family

ID=65768798

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710872877.3A Active CN109524940B (en) 2017-09-18 2017-09-18 Electronic overcurrent over-temperature data line protection device

Country Status (1)

Country Link
CN (1) CN109524940B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI748731B (en) * 2020-11-05 2021-12-01 新唐科技股份有限公司 Chip over current and over temperature protection method

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2104414U (en) * 1991-02-06 1992-05-13 王接枝 Electronical temp. control unit for refrigerator
US5298851A (en) * 1992-05-12 1994-03-29 Transpo Electronics, Inc. Multiple application voltage regulator system and method
CN1101194A (en) * 1993-03-02 1995-04-05 梁建昌 Multifunction electronic alarming device
JP2009100541A (en) * 2007-10-16 2009-05-07 Nikon Corp Excess current protection circuit
CN201886586U (en) * 2010-06-04 2011-06-29 魏锡秦 Electrical fire monitor protector
CN102237671B (en) * 2011-06-06 2016-10-05 刘圣平 Surpass in reverse spacing counting and timing control circuit extremely out of control comprehensively

Also Published As

Publication number Publication date
CN109524940A (en) 2019-03-26

Similar Documents

Publication Publication Date Title
EP3145043A1 (en) Explosion-proof circuit, charging circuit and charging/discharging protection circuit of battery
CN210041316U (en) Over-temperature protection circuit
WO2017097002A1 (en) Anti-surge switching power supply and anti-surge circuit
JP7028245B2 (en) DC voltage supply circuit
CN109524940B (en) Electronic overcurrent over-temperature data line protection device
TWI405396B (en) Boost type power converting apparatus
CN203399102U (en) Transceiver circuit
US20070096932A1 (en) Overload warning device for electric sockets
TWI225327B (en) Power protection device and the electronic device having the same
US8767365B2 (en) Protection circuit
CN217406185U (en) Power protection circuit and power circuit
CN105518957A (en) Battery protection device
TWI334679B (en) Circuit for restraining surge current and surge voltage
CN107846001B (en) The super temperature protective device of electronics three-stage overcurrent
CN203813418U (en) An over-current overvoltage protection circuit used for a thyristor switch power supply
CN208767775U (en) A kind of runaway electric circuit protection circuit and electronic device
CN208797826U (en) A kind of short-circuit protection of external load
TW201832436A (en) Isolating type capacitors tripping system
CN208656405U (en) A kind of acceleration starting self-recovering type loudspeaker enclosure divider and loudspeaker protect circuit
CN204967221U (en) Protective circuit based on PTC thermistor
CN204376399U (en) Self-recovering type overvoltage crowbar
CN220401419U (en) Current-limiting protection circuit and device
CN214479648U (en) Charging protection circuit and electronic device
CN204089182U (en) Self-recoverage over-voltage over-current protection device
CN213521289U (en) Input surge current suppression device

Legal Events

Date Code Title Description
DD01 Delivery of document by public notice
DD01 Delivery of document by public notice

Addressee: SHANGHAI SHENWO ELECTRONICS CO.,LTD.

Document name: Notification of Passing Preliminary Examination of the Application for Invention

PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20240311

Address after: Block A, Building 1, No. 180 Chengye Road, Sheshan Town, Songjiang District, Shanghai, February 2016

Patentee after: SHANGHAI KETER NEW MATERIALS CO.,LTD.

Country or region after: Zhong Guo

Patentee after: SHANGHAI SHENWO ELECTRONICS CO.,LTD.

Address before: No. 736, Zhuanxing East Road, Minhang District, Shanghai, 201108 (near Lianhua South Road)

Patentee before: SHANGHAI SHENWO ELECTRONICS CO.,LTD.

Country or region before: Zhong Guo

DD01 Delivery of document by public notice
DD01 Delivery of document by public notice

Addressee: Zhai Xiaojun

Document name: Notice of Qualified Procedures