KR102237287B1 - High side driver circuit and method for preventing deactivation of load driving - Google Patents

Abstract

The present invention relates to a high-side driver circuit. According to an embodiment of the present invention, the high-side driver circuit comprises: a high-side driver unit having one end connected to a load, and activated or deactivated for driving the load; a first circuit unit having one end connected to the other end of the high-side driver unit, and activating a passive lock function to deactivate the high-side driver unit; a second circuit unit having one end connected to the other end of the first circuit unit and generating a pull-down path to activate the passive lock function of the first circuit unit; and a control unit including a Zener diode, and controlling activation or deactivation of the second circuit unit.

Description

High side driver circuit and load drive deactivation prevention method {HIGH SIDE DRIVER CIRCUIT AND METHOD FOR PREVENTING DEACTIVATION OF LOAD DRIVING}

The present invention relates to a high side driver circuit and a method for preventing deactivation of load driving. In more detail, the present invention relates to a high-side driver circuit capable of preventing deactivation of load driving in an emergency situation and a method of preventing deactivation of load driving.

Load refers to an object that consumes energy from a prime mover, and loads installed on a vehicle are very many related to the safety of people, and an airbag is a representative load.

The airbag is a safety device that can be deployed instantly in case of a vehicle collision and protects everyone in the vehicle.In recent years, not only the front airbag, but also the side airbag or curtain airbag deployed from the side, from the knee direction. Various airbags such as a deployed knee airbag and a belt airbag deployed from a seat belt are being installed together.

These airbags are very effective safety devices because they absorb shocks transmitted to humans instead, but they must be deployed quickly in the event of a vehicle collision, so they can play their original role, preventing the airbag from being deployed even though the vehicle collided. To prevent this, various companies are conducting research and development.

On the other hand, there are various causes of the airbag not being deployed, but one of them is the chassis ground shift. When a chassis ground shift occurs, parasitic components flow inside the airbag system and the passive lock function of the airbag drive circuit is activated, so the airbag may not be deployed. I can.

Accordingly, in the event of an emergency situation including a vehicle collision, a new technology capable of rapidly driving a load of a vehicle including an airbag is required even if a chassis ground shift occurs, and the present invention relates to this.

Republic of Korea Patent Publication No. 10-2010-0066911 (2010.06.18)

The technical problem to be solved by the present invention is a high-side driver circuit capable of quickly driving a load of a vehicle including an airbag even if a chassis ground shift occurs in an emergency situation including a vehicle collision, and a method for preventing deactivation of load driving. Is to provide.

Another technical problem to be solved by the present invention is to provide a method for testing a function of a multi-vehicle controller capable of shortening mass production time and reducing costs consumed for function testing.

In the high-side driver circuit according to an embodiment of the present invention for achieving the above technical problem, one end is connected to a load, a high-side driver unit is activated or deactivated to drive the load, and one end is the other side of the high-side driver unit. The first circuit part is connected to the end and deactivates the high-side driver part by activating a passive lock function, one end is connected to the other end of the first circuit part, and creates a pull-down path. And a second circuit unit and a Zener diode for activating a passive lock function of the first circuit unit, and a control unit for controlling activation or deactivation of the second circuit unit.

According to an embodiment, the control unit may activate or deactivate the second circuit unit by opening or shorting the Zener diode.

According to an embodiment, when the control unit opens the Zener diode, the second circuit unit may be activated to generate the fall-down path.

According to an embodiment, when the control unit shorts the Zener diode, the second circuit unit may be deactivated to block the fall-down path.

According to an embodiment, when the second circuit unit generates a parasitic component fall-down path due to an external error, it is activated to forcibly block the parasitic component fall-down path, and the first circuit unit is passive. It may further include a deactivation preventing unit for deactivating the lock function.

According to an embodiment, when the passive lock function of the first circuit unit is deactivated, the high side driver unit may be activated.

According to an embodiment, the external error may be a chassis ground shift error.

According to an embodiment, the load may be at least one of an engine, a transmission, and an airbag of a vehicle.

In the method for preventing deactivation of load driving according to another embodiment of the present invention for achieving the above technical problem, the control unit detects generation of a parasitic component fall-down path of the second circuit unit due to an external error, and the deactivation prevention unit is activated. Blocking the generated parasitic component fall-down path, deactivating the passive lock function of the first circuit unit by the deactivation preventing unit, and driving the load connected to the first circuit unit by the first circuit unit by activating the first circuit unit Includes.

According to an embodiment, the external error may be a chassis ground shift error.

According to an embodiment, the load may be at least one of an engine, a transmission, and an airbag of a vehicle.

According to the present invention as described above, since the first circuit unit can activate the passive lock function, there is an effect that it is possible to prevent the load from being driven by accidentally being activated in a deactivation section where activation of the load is not required.

In addition, when an external error occurs, the deactivation prevention unit 50 forcibly blocks the parasitic component fall-down path to deactivate the passive lock function of the first circuit unit, so that the load can be quickly and normally operated.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the following description.

1 is a diagram showing an overall configuration included in a high-side driver circuit according to a first embodiment of the present invention.
2 is a diagram illustrating a state in which a high-side driver unit is implemented as an actual circuit.
3 is a diagram illustrating a state in which the first circuit unit is implemented as an actual circuit.
4 is a diagram illustrating a second circuit unit implemented as an actual circuit.
5 is a diagram illustrating a state in which the control unit is implemented as an actual circuit.
6 is a diagram illustrating a state in which the deactivation prevention unit is implemented as an actual circuit.
FIG. 7 is a diagram illustrating an example implementation of a high-side driver circuit 100 according to the first embodiment of the present invention using the actual circuit shown in FIGS. 2 to 6.
FIG. 8 is a diagram illustrating a case in which an external error occurs based on the circuit shown in FIG. 7.
FIG. 9 is a diagram illustrating a state in which an inactivation prevention unit is activated because an external error occurs based on the circuit shown in FIG. 7.
10 is a flow chart showing representative steps of a method for preventing deactivation of a down drive according to a second embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments to be posted below, but may be implemented in various different forms, and only these embodiments make the posting of the present invention complete, and common knowledge in the technical field to which the present invention pertains. It is provided to completely inform the scope of the invention to the possessor, and the invention is only determined by the scope of the claims. The same reference numerals refer to the same elements throughout the specification.

Unless otherwise determined, all terms (including technical and scientific terms) used in the present specification may be used in the sense that can be commonly understood by those of ordinary skill in the art to which the present invention belongs.

Accordingly, the term "load" as used herein refers to all objects that consume energy from the prime mover, more specifically engine, transmission, airbag, audio, air conditioner, lamp, steering, which are components installed in the vehicle and consuming energy. A concept in a broad sense including all of a wheel, a wiper, and various sensors, and for convenience of explanation, an airbag is used as a representative example of a load to continue the description.

In addition, generally used terms determined in advance are not interpreted ideally or excessively unless explicitly specifically determined. The terms used in this specification are for describing exemplary embodiments and are not intended to limit the present invention. In this specification, the singular form also includes the plural form unless specifically stated in the phrase.

As used in the specification, "comprises" and/or "comprising" refers to the presence of one or more other components, steps, actions and/or elements in which the recited component, step, operation and/or element is Or does not preclude additions.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

1 is a diagram showing an overall configuration included in a high-side driver circuit 100 according to a first embodiment of the present invention.

However, this is only a preferred embodiment for achieving the object of the present invention, and some configurations may be added or deleted as necessary, and of course, the role of one configuration may be performed by another configuration.

The high side driver circuit 100 according to the first embodiment of the present invention may include a high side driver unit 10, a first circuit unit 20, a second circuit unit 30, and a control unit 40, and further Further, it may further include a deactivation preventing unit 50.

The high side driver unit 10 has one end connected to the load 5 and is activated or deactivated to drive the load 5.

Here, the load 5 is a concept in a broad sense that includes all of the engine, transmission, airbag, audio, air conditioner, lamp, steering wheel, wiper, various sensors, etc., which are components that are installed in the vehicle and consume energy. Let's continue the explanation by setting as a representative load.

Since the high-side driver unit 10 is activated or deactivated for driving the load 5, when the high-side driver unit 10 is activated, the driving of the load 5 is also activated, and the high-side driver unit 10 is deactivated. In this case, the driving of the load 5 is also deactivated, and whether the driving of the load 5 is activated or deactivated can be viewed as directly corresponding to the activation or deactivation of the high-side driver unit 10.

FIG. 2 is an exemplary diagram illustrating a state in which the high-side driver unit 10 is implemented as an actual circuit, and the high-side driver unit 10 may be implemented as a device that performs a switching function such as a MOSFET.

The first circuit unit 20 has one end connected to the other end of the high side driver unit 10, and deactivates the high side driver unit 10 by activating a passive lock function.

Here, the passive lock function refers to a so-called self-locking function, which is a function for preventing the high-side driver unit 10 from driving a load by being unintentionally activated in an inactive period in which activation is not required.

When the passive lock function of the first circuit unit 20 is activated, the high side driver unit 10 is deactivated so that the drive of the load 5 is also deactivated, and when the passive lock function of the first circuit unit 20 is deactivated, the high side driver unit ( 10) is activated and the drive of the load 5 is also activated, enabling or deactivating the passive lock function, more specifically, activation of the first circuit unit 20 (activation of the passive lock function) or deactivation (deactivation of the passive lock function) May be viewed as directly corresponding to the deactivation or activation of the high side driver unit 10.

Meanwhile, since the first circuit unit 20 is connected to the other end of the high side driver unit 10, it can be seen that it is disposed at the front end of the high side driver unit 10. It can be seen as a circuit part.

FIG. 3 is an exemplary diagram illustrating a first circuit unit 20 implemented as an actual circuit. The first circuit unit 20 is a device that performs a switching function such as a MOSFET, and a constant voltage source function such as a Zener diode. It can be implemented with a device such as a device and a resistor.

The second circuit unit 30 is connected to the other end of the first circuit unit 20 and generates a pull-down path to activate the passive lock function of the first circuit unit 20.

When the second circuit unit 30 generates a fall-down path, the passive lock function of the first circuit unit 20 is activated, and when the second circuit unit 30 blocks the fall-down path, the first circuit unit 20 is passive. Since the lock function is deactivated, activation or deactivation of the second circuit unit 30 can be considered to directly correspond to activation (activation of the passive lock function) or deactivation (deactivation of the passive lock function) of the first circuit unit 20. have.

Meanwhile, since the second circuit unit 30 generates a fall-down path to activate the passive lock function of the first circuit unit 20, the second circuit unit 30 can be regarded as a passive gate pull-down circuit unit.

4 illustrates an example of implementing the second circuit unit 30 as an actual circuit, the second circuit unit 30 may be implemented as a switching device such as a MOSFET and a device such as a resistor.

The control unit 40 includes a Zener diode and controls activation or deactivation of the second circuit unit 30.

Previously, whether the drive of the load 5 is activated or deactivated directly corresponds to the activation or deactivation of the high-side driver unit 10, and activation (activation of the passive lock function) or deactivation (passive lock function) of the first circuit unit 20 Deactivation) corresponds directly to deactivation or activation of the high-side driver unit 10, and activation or deactivation of the second circuit unit 30 is the activation (activation of the passive lock function) or deactivation of the first circuit unit 20 ( The passive lock function is deactivated), and the control unit 40 controls activation or deactivation of the second circuit unit 30, so the high side driver unit 10, the first circuit unit 20, and the second It can be seen that all of the circuit units 30 are substantially controlled. That is, in the high side driver circuit according to the first embodiment of the present invention, the order of control is the control unit 40 → the second circuit unit 30 → the first circuit unit 20 → the high side driver unit 10 → the load 5 ).

FIG. 5 is an exemplary diagram illustrating a state in which the control unit 40 is implemented as an actual circuit. The control unit 40 is a device that functions as a constant voltage source such as a Zener diode, a device that functions as a rectifier such as a diode, and a device such as a switch. It can be implemented as

The control unit 40 can open or short the Zener diode to activate or deactivate the second circuit unit 30, which is possible through a switch, and the control unit 40 opens the Zener diode. In this case, the second circuit unit 30 is activated to generate a fall-down path, and when the control unit 40 shorts the Zener diode, the second circuit unit 30 may be deactivated to block the fall-down path.

The deactivation prevention unit 50 is activated when the second circuit unit 30 generates a parasitic component fall-down path due to occurrence of an external error, and forcibly deactivates the parasitic component fall-down path, and the first circuit unit ( Disable the passive lock function of 20).

This deactivation preventing unit 50 is connected to the other end of the first circuit unit 20 and one end of the control unit 40 excluding the other end to which the second circuit unit 40 is connected, and is not always driven, but a parasitic component due to external error occurrence. When this is detected, it is preferable to drive. Since the deactivation prevention unit 50 deactivates the passive lock function of the first circuit unit 20, it is unintentionally activated in the deactivation section in which the activation of the load 5 is not required. This is to prevent driving the load.

Here, the external error may be a chassis ground shift error, and in addition, any external error that may affect the driving of the high-side driver circuit 100 according to the first embodiment of the present invention can be seen. It is obvious that it is all included in the external error.

On the other hand, when a vehicle crashes, when a chassis ground shift occurs, a parasitic component fall-down path is created, and accordingly, the passive lock function of the first circuit unit 20 is activated, and the airbag, which is the load 5, is not deployed. Therefore, everyone in the vehicle can be greatly shocked, and if the shock is severe, it can lead to death.

However, in the event of a collision of a vehicle in which the chassis ground shift has occurred, such a situation can be prevented by the deactivation prevention unit 50. When the deactivation prevention unit 50 is activated to forcibly block the parasitic component fall-down path, Since the passive lock function of the first circuit unit 20 is also deactivated, the high side driver unit 10 is activated, and as the high side driver unit 10 is activated, the airbag serving as the load 5 can also be quickly deployed. to be.

Meanwhile, since the deactivation preventing unit 50 forcibly blocks the parasitic component fall-down path to deactivate the passive lock function of the first circuit unit 20, the deactivation preventing unit 50 can be regarded as a Parasitic Free Activation circuit unit.

6 illustrates an example of the deactivation prevention unit 50 implemented as an actual circuit, the deactivation prevention unit 50 may be implemented as a device that performs a switching function, such as a MOSFET.

Hereinafter, driving of the high-side driver circuit 100 according to the first embodiment of the present invention when an external error occurs will be described with reference to FIGS. 7 to 9.

7 is a diagram showing an actual circuit of the high-side driver circuit 100 according to the first embodiment of the present invention implemented through the actual circuit shown in FIGS. 2 to 6, and FIG. When an external error occurs based on the circuit, FIG. 9 is a diagram illustrating a state in which the deactivation preventing unit 50 is activated because an external error occurs based on the circuit shown in FIG. 7.

Referring to FIG. 8, even when an external error occurs and the second circuit unit 30 is deactivated (①, OFF), as a parasitic component fall-down path (parasitic current) is generated (②, ON), the first circuit unit ( 20) is activated (③, ON), the passive lock function is also activated, and the high side driver unit 10 is deactivated (④, OFF) to confirm that the airbag, which is the load 5, is not deployed, and the deactivation prevention unit It can be seen that (50) is deactivated (OFF).

However, referring to FIG. 9, the deactivation preventing unit 50 is activated (①, ON) to forcibly block the parasitic component fall-down path (parasitic current) (②, OFF), and the first circuit unit 20 is deactivated. It can be confirmed that the passive lock function is also deactivated (③, OFF), and the high side driver unit 10 is activated (④, ON), so that the airbag, which is the load 5, is deployed.

So far, the high side driver circuit according to the first embodiment of the present invention has been described. According to the present invention, since the first circuit unit 20 can activate the passive lock function, it is possible to prevent the load from being driven by accidentally being activated in the deactivation section where activation of the load 5 is not required, and furthermore When an external error occurs, the deactivation prevention unit 50 forcibly blocks the parasitic component fall-down path and deactivates even the passive lock function of the first circuit unit 20, so that the load 5 can be quickly and normally operated. .

On the other hand, the high-side driver circuit 100 according to the first embodiment of the present invention described above may be implemented as a method for preventing deactivation of load driving according to the second embodiment of the present invention, which includes all the same technical features. In the method for preventing deactivation of load driving according to the second embodiment of the present invention, which is a representative step in, the control unit 40 detects the generation of a parasitic component fall-down path of the second circuit unit 30 due to an external error ( S1010), the step of blocking the parasitic component fall-down path generated by the activation of the deactivation preventing unit 50 (S1020), the step of deactivating the passive lock function of the first circuit unit 20 by the deactivation preventing unit 50 ( S1030) and the first circuit unit 20 is activated to drive the load 5 having one end connected to the first circuit unit 20 (S1040).

In addition, although not described in detail for redundant description, the method for preventing deactivation of load driving according to the second embodiment of the present invention includes all technical features applied to the high-side driver circuit 100 according to the first embodiment of the present invention and accordingly. Of course, you can share the effect.

Embodiments of the present invention have been described above with reference to the accompanying drawings, but those of ordinary skill in the art to which the present invention pertains can be implemented in other specific forms without changing the technical spirit or essential features. You will be able to understand. Therefore, it should be understood that the embodiments described above are illustrative and non-limiting in all respects.

100: high side driver circuit
5: load
10: high side driver unit
20: first circuit unit
30: second circuit unit
40: control unit
50: deactivation prevention unit

Claims (11)

A high-side driver unit having one end connected to the load and activated or deactivated to drive the load;
A first circuit unit having one end connected to the other end of the high side driver unit, and deactivating the high side driver unit by activating a passive lock function;
A second circuit unit having one end connected to the other end of the first circuit unit and generating a pull-down path to activate a passive lock function of the first circuit unit;
A control unit including a Zener diode and controlling activation or deactivation of the second circuit unit; And
When the second circuit unit generates a parasitic component fall-down path due to occurrence of an external error, it is activated to forcibly block the parasitic component fall-down path and deactivate the passive lock function of the first circuit unit. Prevention part;
High side driver circuit comprising a. The method of claim 1,
The control unit,
Opening or shorting the Zener diode to activate or deactivate the second circuit unit,
High side driver circuit. The method of claim 2,
When the control unit opens the Zener diode,
The second circuit portion is activated to generate the fall-down path,
High side driver circuit. The method of claim 2,
When the control unit shorts the Zener diode,
The second circuit unit is deactivated to block the fall-down path,
High side driver circuit. delete The method of claim 1,
When the passive lock function of the first circuit unit is deactivated, the high side driver unit is activated,
High side driver circuit. The method of claim 1,
The external error is,
Chassis Ground Shift error,
High side driver circuit. The method of claim 1,
The load is,
Any one or more of the vehicle's engine, transmission, and airbag,
High side driver circuit. Detecting, by the controller, generation of a parasitic component fall-down path of the second circuit unit due to occurrence of an external error;
Blocking the generated parasitic component fall-down path by activating an inactivation prevention unit;
Deactivating the passive lock function of the first circuit unit by the deactivation preventing unit; And
Driving a load having one end connected to the first circuit part by activating the first circuit part;
Load drive deactivation prevention method comprising a. The method of claim 9,
The external error is,
Chassis Ground Shift error,
How to prevent deactivation of load drive. The method of claim 9,
The load is,
Any one or more of the vehicle's engine, transmission, and airbag,
How to prevent deactivation of load drive.

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