High-side driving circuit

Abstract

The utility model discloses a high-side driving circuit, which belongs to the technical field of electronic circuits and comprises a control module, a Darlington tube module, a relay module, a power supply and a recoverable fuse module. The control module is connected with the Darlington tube module; the Darlington tube module is connected with the relay module; the power supply is connected with the relay module; the relay module is connected with an external load through the resettable fuse module. The high-side driving circuit provided by the utility model can realize high-side driving of the external load.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of electronic circuit, specifically, the utility model relates to a high side drive circuit. BACKGROUND

[0002] With the continuous development of the automobile industry, modern cars are more diversified and safer. Under this background, more drive circuits are needed. Due to the influence of the global chip market environment, high side drive chips will be in short supply at certain times, so more options are needed to meet design needs or production needs.

[0003] A battery protection circuit, a battery protection system and an electronic device are disclosed in patent CN219960142U. The battery protection circuit includes a battery protection chip, a temperature detection circuit and a voltage stabilizing circuit. The first end of the voltage stabilizing circuit is coupled to the positive connection end of the battery protection circuit, the second end of the voltage stabilizing circuit is grounded, and the third end of the voltage stabilizing circuit is connected to the battery protection chip. The first end of the temperature detection circuit is coupled to the connection node between the third end of the voltage stabilizing circuit and the battery protection chip, and the other end of the temperature detection circuit is grounded for detecting the ambient temperature and outputting a temperature detection signal to the battery protection chip.

[0004] However, the technology disclosed in the above patent cannot realize high side drive of external load. UTILITY MODEL CONTENTS

[0005] The technical problem to be solved by the utility model is to provide a high side drive circuit to achieve the purpose of high side drive of external load in view of the deficiencies of the prior art.

[0006] In order to achieve the above purpose, the technical scheme adopted by the utility model is:

[0007] The utility model provides a kind of high side drive circuit, including control module, darlington tube module, relay module, power supply and recoverable fuse module;Control module is connected with darlington tube module;Darlington tube module is connected with relay module;Power supply is connected with relay module;Relay module is connected with external load by recoverable fuse module.

[0008] Further, the darlington tube module includes a first darlington tube and a second darlington tube;The control module is connected with the first darlington tube and the second darlington tube respectively;The relay module is connected with the first darlington tube and the second darlington tube respectively.

[0009] Further, the recoverable fuse module includes a first recoverable fuse and a second recoverable fuse;The relay module is connected with the first recoverable fuse and the second recoverable fuse respectively.

[0010] Further, the control module outputs a control signal to the Darlington tube module; the Darlington tube module amplifies the control signal output by the control module.

[0011] Further, when the control module does not control the relay module to be attracted, the external load is in a closed state.

[0012] Further, when the control module controls the relay module to be attracted, and the current in the high-side drive circuit is not greater than the current allowed to pass through the resettable fuse module, the external load works normally.

[0013] Further, when the control module controls the relay module to be attracted, and the current in the high-side drive circuit is greater than the current allowed to pass through the resettable fuse module, the external load stops working.

[0014] The high-side drive circuit has the following advantages:

[0015] (1) The high-side drive circuit can realize high-side drive of the external load.

[0016] (2) When the high-side drive circuit realizes high-side drive of the external load, the short circuit or overcurrent phenomenon of the external load can be prevented.

[0017] (3) After the high-side drive circuit prevents the short circuit or overcurrent phenomenon of the external load, the protection of the high-side drive circuit can also be realized.

[0018] (4) The high-side drive circuit can also provide another option for designers or producers when the high-side drive chip cannot meet the design needs or production needs.

[0019] (5) The high-side drive circuit adopts the combination of the relay module and the resettable fuse module, and can realize function replacement in the case of shortage of intelligent high-side drive chips. BRIEF DESCRIPTION OF DRAWINGS

[0020] The present specification includes the following drawings, and the shown contents are respectively:

[0021] Figure 1 is a logic structure block diagram of the high-side drive circuit of the utility model;

[0022] Figure 2 is a schematic diagram of the high-side drive circuit of the utility model.

[0023] Explanation of reference signs: 1, control module; 2, darlington tube module; 3, relay module; 4, power supply; 5, recoverable fuse module; 6, external load; 21, first darlington tube; 22, second darlington tube; 51, first recoverable fuse; 52, second recoverable fuse; 61, first external load; 62, second external load. DETAILED DESCRIPTION

[0024] The specific embodiments of the utility model are further explained in detail below by describing the embodiments with reference to the drawings, the purpose being to help the skilled in the art have a more complete, accurate and in-depth understanding of the concept and technical solution of the utility model, and to help them implement it.

[0025] Figure 1 is a logic structure block diagram of a high-side drive circuit of the utility model, comprising a control module 1, a darlington tube module 2, a relay module 3, a power supply 4 and a recoverable fuse module 5; wherein the control module 1 is connected with the darlington tube module 2; the darlington tube module 2 is connected with the relay module 3; the power supply 4 is connected with the relay module 3; the relay module 3 is connected with the external load 6 through the recoverable fuse module 5. In addition, Figure 2 is a schematic diagram of a high-side drive circuit of the utility model, comprising Figure 2 It can be seen that the darlington tube module 2 comprises a first darlington tube 21 and a second darlington tube 22; the control module 1 is connected with the first darlington tube 21 and the second darlington tube 22 respectively; the relay module 3 is connected with the first darlington tube 21 and the second darlington tube 22 respectively; the recoverable fuse module 5 comprises a first recoverable fuse 51 and a second recoverable fuse 52; the relay module 3 is connected with the first recoverable fuse 51 and the second recoverable fuse 52 respectively. The high-side drive circuit of the utility model adopts the form of combination of the relay module 3 and the recoverable fuse module 5, and can perform functional replacement in the case of shortage of intelligent high-side drive chips, that is, when the high-side drive chip cannot meet the needs of design or production, the high-side drive circuit of the utility model can provide another option for designers or producers.

[0026] In the specific embodiments, the relay module 3 adopts a double-pole relay (double-position relay), which can adopt a double-pole relay (double-position relay) with a model number of HFKA-T 12-2ZT, and can also adopt a double-pole relay (double-position relay) with the same function; in addition, the relay module 3 is not limited to adopting a double-pole relay (double-position relay), and can also adopt two separate relays to achieve the same function.

[0027] The specific embodiments of the utility model are further explained in detail below by describing the embodiments with reference to the drawings, the purpose being to help the skilled in the art have a more complete, accurate and in-depth understanding of the concept and technical solution of the utility model, and to help them implement it. Figure 1 and Figure 2The working principle of the utility model is as follows:

[0028] The control module 1 outputs control signals to the Darlington tube module 2, controls the attraction and disconnection of the relay module 3, the Darlington tube module 2 amplifies the control signals output by the control module 1, improves the internal driving force, provides power supply for the external load 6 through the attraction of the relay module 3, drives the external load 6, and the recoverable fuse module 5 is used for protecting the high-side drive circuit and preventing the short circuit and overcurrent of the external load 6; that is, the control module 1 outputs control signals, controls the attraction and disconnection of the relay module 3 through the Darlington tube module 2, and controls the current allowed to pass in the high-side drive circuit by adjusting the specification of the recoverable fuse 5. That is, the high-side drive circuit of the utility model can realize the high-side drive of the external load 6, can also prevent the short circuit or overcurrent of the external load 6, and can further realize the protection of the high-side drive circuit.

[0029] When the control module 1 does not control the attraction of the relay module 3, the external load 6 is in a closed state.

[0030] When the control module 1 controls the relay module 3 to be attracted, and the current in the high-side drive circuit is not greater than the current allowed to pass through by the resettable fuse module 5, the external load 6 works normally; when the control module 1 controls the relay module 3 to be attracted, and the current in the high-side drive circuit is greater than the current allowed to pass through by the resettable fuse module 5, the resettable fuse module 5 enters a high-resistance state, and then the external load 6 stops working, wherein after the resettable fuse module 5 enters the high-resistance state, the working current is rapidly reduced, thereby limiting and protecting the high-side drive circuit, when the resettable fuse module 5 ends the high-resistance state and enters a low-resistance state after the fault is eliminated, the external load 6 resumes normal work. That is, the high-side drive circuit of the utility model can realize high-side drive of the external load 6, and can also prevent the external load 6 from short-circuiting or overcurrent, thereby also realizing protection of the high-side drive circuit, in addition, the high-side drive circuit of the utility model adopts the form of combination of the relay module 3 and the resettable fuse module 5, and can realize functional substitution in the case of shortage of intelligent high-side drive chips, that is, when the high-side drive chip cannot meet the needs of design or production, the high-side drive circuit of the utility model can provide another option for designers or producers.Specifically, when the control module 1 controls the relay module 3 to be attracted to the first Darlington tube 21 and the first recoverable fuse 51, and the current flowing through the first recoverable fuse 51 is not greater than the current allowed to pass through the first recoverable fuse 51, the external load 61 works normally; when the control module 1 controls the relay module 3 to be attracted to the first Darlington tube 21 and the first recoverable fuse 51, and the current flowing through the first recoverable fuse 51 is greater than the current allowed to pass through the first recoverable fuse 51, the first recoverable fuse 51 enters a high resistance state, and the external load 61 stops working, wherein after the first recoverable fuse 51 enters the high resistance state, the working current is rapidly reduced, thereby limiting and protecting the high-side drive circuit, and when the first recoverable fuse 51 ends the high resistance state and enters a low resistance state after the fault is eliminated, the external load 61 resumes normal work; when the control module 1 controls the relay module 3 to be attracted to the second Darlington tube 22 and the second recoverable fuse 52, and the current flowing through the second recoverable fuse 52 is not greater than the current allowed to pass through the second recoverable fuse 52, the external load 62 works normally; when the control module 1 controls the relay module 3 to be attracted to the second Darlington tube 22 and the second recoverable fuse 52, and the current flowing through the second recoverable fuse 52 is greater than the current allowed to pass through the second recoverable fuse 52, the second recoverable fuse 52 enters a high resistance state, and the external load 62 stops working, wherein after the second recoverable fuse 52 enters the high resistance state, the working current is rapidly reduced, thereby limiting and protecting the high-side drive circuit, and when the second recoverable fuse 52 ends the high resistance state and enters a low resistance state after the fault is eliminated, the external load 62 resumes normal work. In addition, the control module 1 can also control the attraction or disconnection of the relay connected to the first Darlington tube 21 and the first recoverable fuse 51 in the relay module 3 and the relay connected to the second Darlington tube 22 and the second recoverable fuse 52 in the relay module 3 at the same time.

[0031] In the specific embodiment, the control module 1 can adopt a microcontroller (MCU), and can also adopt a controller capable of achieving the same function; the first Darlington tube 21 and the second Darlington tube 22 can both adopt a Darlington tube with a model number of ULN2003, and can also adopt a Darlington tube model number capable of achieving the same function; the first recoverable fuse 51 and the second recoverable fuse 52 can both adopt a 2920L series recoverable fuse, and can also adopt a recoverable fuse model capable of achieving the same function, in addition, the first recoverable fuse 51 and the second recoverable fuse 52 need to be selected according to the current and wire diameter of different external loads 6 when selecting the model.

[0032] Effects of the embodiment

[0033] Figure 1 The utility model relates to a kind of logic structure block diagram of high-side drive circuit, including control module 1, darlington tube module 2, relay module 3, power supply 4 and recoverable fuse module 5;Wherein, control module 1 is connected with darlington tube module 2;Darlington tube module 2 is connected with relay module 3;Power supply 4 is connected with relay module 3;Relay module 3 is connected with external load 6 by recoverable fuse module 5.In addition, Figure 2 The utility model relates to a kind of principle diagram of high-side drive circuit, by Figure 2 It can be seen that darlington tube module 2 includes first darlington tube 21 and second darlington tube 22;Control module 1 is connected with first darlington tube 21 and second darlington tube 22 respectively;Relay module 3 is connected with first darlington tube 21 and second darlington tube 22 respectively;Recoverable fuse module 5 includes first recoverable fuse 51 and second recoverable fuse 52;Relay module 3 is connected with first recoverable fuse 51 and second recoverable fuse 52 respectively.In the high-side drive circuit of the utility model, the form of combination of relay module 3 and recoverable fuse module 5 is used, can be functionally replaced in the case where intelligent high-side drive chip is short, i.e. when high-side drive chip cannot meet the needs of design or production demand, the high-side drive circuit of the utility model can provide another choice for designer or producer.

[0034] Control signal is outputted from control module 1 to darlington tube module 2, control the attraction and disconnection of relay module 3, darlington tube module 2 amplifies the control signal outputted by control module 1, improves internal drive inner force, provides power supply for external load 6 by the attraction of relay module 3, drives external load 6, recoverable fuse module 5 is used to protect high-side drive circuit, prevent external load 6 short circuit and overcurrent;That is, control signal is outputted from control module 1, the attraction and disconnection of relay module 3 are controlled by darlington tube module 2, the current allowed to pass in high-side drive circuit is controlled by adjusting the specification of recoverable fuse 5.That is, by the high-side drive circuit of the utility model, high-side drive to external load 6 can be realized, short circuit or overcurrent phenomenon of external load 6 can also be prevented, and then the protection of high-side drive circuit can also be realized.

[0035] When the control module 1 controls the relay module 3 to be attracted, and the current in the high-side drive circuit is not greater than the current allowed to pass through by the resettable fuse module 5, the external load 6 works normally; when the control module 1 controls the relay module 3 to be attracted, and the current in the high-side drive circuit is greater than the current allowed to pass through by the resettable fuse module 5, the resettable fuse module 5 enters a high-resistance state, and then the external load 6 stops working, wherein, after the resettable fuse module 5 enters the high-resistance state, the working current is rapidly reduced, thereby limiting and protecting the high-side drive circuit, when the resettable fuse module 5 ends the high-resistance state and enters a low-resistance state after the fault is eliminated, the external load 6 resumes normal work. That is, the high-side drive circuit of the utility model can realize high-side drive of the external load 6, and can also prevent the external load 6 from short-circuiting or overcurrent, thereby also realizing protection of the high-side drive circuit, in addition, the high-side drive circuit of the utility model adopts the form of combination of the relay module 3 and the resettable fuse module 5, and can realize functional substitution in the case of shortage of intelligent high-side drive chips, that is, when the high-side drive chip cannot meet the needs of design or production, the high-side drive circuit of the utility model can provide another option for designers or producers.

[0036] The utility model has been described above in conjunction with the drawings. Obviously, the specific implementation of the utility model is not limited by the above-mentioned mode. As long as various non-essential improvements are made by adopting the method concept and technical scheme of the utility model, or the above-mentioned concept and technical scheme of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A high-side driver circuit, characterized by: The application relates to a control module, a Darlington tube module, a relay module, a power supply and a recoverable fuse module; the control module is connected with the Darlington tube module; the Darlington tube module is connected with the relay module; the power supply is connected with the relay module; the relay module is connected with an external load through the recoverable fuse module.

2. A high-side driver circuit as claimed in claim 1, characterized in that: The Darlington tube module comprises a first Darlington tube and a second Darlington tube; the control module is connected with the first Darlington tube and the second Darlington tube respectively; the relay module is connected with the first Darlington tube and the second Darlington tube respectively.

3. A high-side driver circuit as claimed in claim 2, characterized in that: The recoverable fuse module comprises a first recoverable fuse and a second recoverable fuse; the relay module is connected with the first recoverable fuse and the second recoverable fuse respectively.

4. A high-side driver circuit as claimed in claim 3, characterized in that: The control module outputs a control signal to the Darlington tube module; the Darlington tube module amplifies the control signal output by the control module.

5. A high-side driver circuit as claimed in claim 4, characterized in that: When the control module does not control the relay module to be attracted, the external load is in a closed state.

6. A high-side driver circuit as claimed in claim 4, characterized in that: When the control module controls the relay module to be attracted, and the current in a high-side drive circuit is not greater than the current allowed to pass through the recoverable fuse module, the external load normally works.

7. A high-side driver circuit as claimed in claim 4, characterized in that: When the control module controls the relay module to be attracted, and the current in a high-side drive circuit is greater than the current allowed to pass through the recoverable fuse module, the external load stops working.

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