[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

KR101795184B1 - Load driving device - Google Patents

Load driving device Download PDF

Info

Publication number
KR101795184B1
KR101795184B1 KR1020150178574A KR20150178574A KR101795184B1 KR 101795184 B1 KR101795184 B1 KR 101795184B1 KR 1020150178574 A KR1020150178574 A KR 1020150178574A KR 20150178574 A KR20150178574 A KR 20150178574A KR 101795184 B1 KR101795184 B1 KR 101795184B1
Authority
KR
South Korea
Prior art keywords
load
power supply
pull
internal power
load driving
Prior art date
Application number
KR1020150178574A
Other languages
Korean (ko)
Other versions
KR20170070941A (en
Inventor
강선두
박현석
Original Assignee
현대오트론 주식회사
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 현대오트론 주식회사 filed Critical 현대오트론 주식회사
Priority to KR1020150178574A priority Critical patent/KR101795184B1/en
Publication of KR20170070941A publication Critical patent/KR20170070941A/en
Application granted granted Critical
Publication of KR101795184B1 publication Critical patent/KR101795184B1/en

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/005—Electro-mechanical devices, e.g. switched
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
    • G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
    • 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
    • H02H3/16—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 fault current to earth, frame or mass

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electronic Switches (AREA)

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a load driving apparatus, and more particularly, to a vehicular control system configured to support a stable operation of a load through bidirectional leakage current cutoff, And to a load driving apparatus provided with the same.
The present invention provides a load driving apparatus including a control circuit and a drive IC having a FET, the load driving circuit comprising: an internal power supply (VBR); And a pull-up resistance part (R1) having one side connected to the internal power supply part and the other side connected to a drain of the FET, wherein a resistance value of the pull-up resistance part is an impedance value The load driving apparatus can be provided.

Description

[0001] LOAD DRIVING DEVICE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a load driving apparatus, and more particularly, to a vehicular control system configured to support a stable operation of a load through bidirectional leakage current cutoff, And to a load driving apparatus provided with the same.

The driving device for controlling the load of the vehicle must have a diagnosis function and a protection function for failure of the load or disconnection or short circuit of the external connection.

For this diagnostic function, a method of measuring the potential level between the semiconductor electrodes by using the diagnostic current in the drive IC (Drive IC) is generally used. At this time, the malfunction of the load due to the diagnosis current should not occur.

On the other hand, a power supply is required for the operation of the load and the driving circuit, and each power supply is often supplied independently.

When the independent power source is used as described above, the state and potential of each power source may be different from each other. If the leakage occurs, the performance of the component may be deteriorated or a malfunction of the load may occur.

Fig. 1 is an explanatory diagram showing a circuit configuration of a load driving apparatus according to the prior art.

Referring to FIG. 1, it can be seen that the load driving apparatus according to the related art includes a control unit 110 and a drive circuit (Drive IC, 120).

That is, in the case of the load driving apparatus according to the prior art as shown in FIG. 1, when performing the diagnosis / protection function for the load 130 by utilizing the diagnosis current, the selective application considering the characteristics of the individual load 130 .

In other words, if a malfunction of the load 130 due to the diagnostic current occurs or is expected to occur, the discrete elements corresponding to the load 130 are used instead of the drive circuit 120 to load 130) separate diagnostic / protection functions had to be implemented separately.

As a result, the versatility of the load driving apparatus is deteriorated and the kinds of parts for implementing the load driving apparatus are inevitably increased, which causes a problem such as an increase in manufacturing cost.

Further, even if the malfunction of the load 130 due to the diagnostic current does not occur, the path of the diagnostic current always passes through the load, and therefore there is a problem that the characteristics of the load are changed.

Korean Patent Laid-Open Publication No. 10-2013-0037853 (entitled INPUT INTERFACE CIRCUIT DEVICE OF ENGINE CONTROL UNIT) Korean Patent Registration No. 10-0843366 (entitled "Load Drive Device")

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a vehicle control system configured to provide a stable operation of a load through bidirectional leakage current interruption, And it is an object of the present invention to provide a load driving apparatus.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention which are not mentioned can be understood by the following description and more clearly understood by the embodiments of the present invention. It will also be readily apparent that the objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.

According to an aspect of the present invention, there is provided a load driving apparatus including a controller and a drive IC having a FET, the load driving apparatus comprising: an internal power supply unit; And a pull-up resistance part (R1) having one side connected to the internal power supply part and the other side connected to a drain of the FET, wherein a resistance value of the pull-up resistance part is an impedance value The load driving apparatus can be provided.

The switching unit may further include a switching unit for selectively flowing the diagnostic current of the control unit through the pull-up resistor unit when the FET is in a turn-off state. It may be preferable that a base is constituted by an output terminal of the control unit, an emitter is the pull-up resistor unit and a transistor is a transistor T1 whose collector is connected to the internal power supply unit.

The leakage current cutoff unit may further include a leakage current cutoff unit for cutting off a leakage current generated by a potential difference between an external power supply and an internal power supply supplied from the internal power supply unit. And a diode element disposed between the other side of the pull-up resistor and the external load.

According to the present invention as described above, since the pull-up resistor is connected to the drain of the FET included in the driving circuit, the replacement for the diagnostic current supplied through the drive IC It is possible to secure a route.

Further, in the present invention, when the FET of the driving circuit is turned off through the output terminal of the control unit and the switching element connected to the pull-up resistor, the diagnostic current supplied from the control unit is supplied to the switching element and the pull- The influence of the diagnostic current on the external load can be excluded.

In addition, there is an advantage that it is possible to improve the internal and external consistency of the load driving device by providing the leakage current cut-off portion constituted by a diode element or the like in order to cut off the leakage current caused by the potential difference between the internal power supply and the external power supply .

As a result, it is possible to block the occurrence of side effects due to the diagnostic current, so that a separate circuit configuration according to the load characteristic is not required, and the consistency of the load driving apparatus can be maintained regardless of the impedance characteristics of the external load , Reduction in manufacturing cost due to improvement in versatility of the load driving device, and the like.

1 is an explanatory view showing a circuit configuration of a load driving apparatus according to the prior art.
2 is an explanatory view showing a circuit configuration of a load driving apparatus according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.

It is to be understood that the following specific structure or functional description is illustrative only for the purpose of describing an embodiment in accordance with the concepts of the present invention and that embodiments in accordance with the concepts of the present invention may be embodied in various forms, It should not be construed as limited to the embodiments.

The embodiments according to the concept of the present invention can make various changes and have various forms, so that specific embodiments are illustrated in the drawings and described in detail in this specification or application. However, it should be understood that the embodiments according to the concept of the present invention are not intended to limit the present invention to specific modes of operation, but include all changes, equivalents and alternatives included in the spirit and scope of the present invention.

The terms first and / or second etc. may be used to describe various components, but the components are not limited to these terms. The terms may be named for the purpose of distinguishing one element from another, for example, without departing from the scope of the right according to the concept of the present invention, the first element being referred to as the second element, The second component may also be referred to as a first component.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when it is mentioned that an element is "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between. Other expressions for describing the relationship between components, such as "between" and "between" or "adjacent to" and "directly adjacent to" should also be interpreted.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. It is to be understood that the terms such as " comprises "or" having "in this specification are intended to specify the presence of stated features, integers, But do not preclude the presence or addition of steps, operations, elements, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the meaning of the context in the relevant art and, unless explicitly defined herein, are to be interpreted as ideal or overly formal Do not.

2 is an explanatory view showing a circuit configuration of a load driving apparatus according to an embodiment of the present invention.

2, the load driving apparatus according to an embodiment of the present invention includes a control unit 210 and a driving circuit (Drive IC, 220) It can be confirmed that the load driving apparatus according to the related art is additionally provided with components such as a pull-up resistor R1, a switching unit T1 and a leakage current blocking unit D1.

The pull-up resistor R1 is connected between the drain of the driving circuit 220 and the internal power source VBR.

The pull-up resistor R1 may serve as an alternative path for the diagnostic current generated by the controller 210 and transmitted to the external load 230 via the driver circuit 220. In other words, The diagnosis current outputted from the driving circuit 220 in the turn-off state of the external load 230 is not applied to the external load 230 but can be distributed through the pull-up resistor R1.

Accordingly, it is preferable that the resistance value of the pull-up resistor R1 is designed to be sufficiently smaller than the impedance value of the external load 230. [

In order to selectively operate the pull-up resistor R1 only in the turn-off state of the driving circuit 220, in the present invention, the pull-up resistor R1 is located between the internal power source VBR and the pull- A switching unit T1 may be additionally provided.

In this case, the base of the transistor is connected to the output terminal of the controller 210, the emitter of the transistor is connected to the pull-up resistor R1, The collector may be arranged to be connected to the internal power supply (VBR).

That is, the switching unit T 1 is selectively operated only in the turned-off state of the driving circuit 220 through the control of the controller 210, so that the switching unit T 1 is turned on in the turning off state of the driving circuit 220, 220 can be distributed through the pull-up resistor R1.

Accordingly, when the driving circuit 220 is turned off, the diagnostic current flows through the T1-R1 path connected to the internal power supply VBR, thereby preventing the occurrence of the current flow through the external load 230 Malfunction of the external load 230 and change of characteristics can be avoided.

At this time, in order to avoid the possibility that the power source Vcc of the internal power source VBR and the external load 230 may affect each other, the present invention may further include the leakage current interrupter D1.

 That is, when there is a potential difference between the internal and external power sources Vbb and Vcc, a leakage current can be generated in any direction. This can be avoided through the leakage current interrupting portion D1 composed of a diode element or the like as follows.

1) When the internal power supply VBR is off and the external load power supply Vcc is on, a leakage current may be generated inward from the external load 230 side. This may cause a malfunction of the load, and an abnormal potential may occur in the internal power supply. Such a leakage current can be shut off by turning on the switching unit T1 due to the off of the internal power supply.

2) When the internal power supply VBR is on and the external load power supply Vcc is off, a leakage current may be generated in the direction of the external load 230 from the inside of the load driving device. Accordingly, a reverse voltage may be applied to the load, which may cause a malfunction, and the efficiency of the load driving apparatus may be reduced. This can be solved by the leakage current cut-off part D1 additionally provided in the load driving device according to the embodiment of the present invention.

However, in this case, it is preferable that the reverse recovery time of the diode element is sufficiently fast so as not to affect the driving speed of the load 230.

Meanwhile, the present invention enables a more precise diagnosis of the load 230 through the presence of the lead line connected to the control unit 210 from the external load 230 and the resistance elements R 2 and R 3 included therein And the like can be provided.

According to the load driving apparatus of the present invention as described above, it is possible to secure an alternative path for the diagnostic current supplied through the driving circuit 220 through the provision of the pull-up resistor R1 and the switching unit T1 The diagnosis current supplied from the control unit 210 can be distributed through the switching unit T1 and the pull-up resistor R1 when the FET of the driving circuit 220 is turned off, It is possible to provide an advantage that the influence on the load 230 can be excluded.

In addition, by providing the switching section composed of the leakage current interruption section constituted by the diode element D1 or the like and the transistor element T1 or the like for interrupting the leakage current caused by the potential difference between the internal power supply and the external power supply, It is possible to improve the internal and external consistency of the driving apparatus.

Thus, in the load driving apparatus according to the embodiment of the present invention, it is possible to block the occurrence of the side effect of the load 230 due to the diagnosis current, and a separate circuit configuration according to the load characteristic is not required, It is possible to maintain the consistency of the load driving device irrespective of characteristics and the like, and thus it is possible to provide various effects such as reduction in manufacturing cost due to improvement in versatility of the load driving device and the like.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, But the present invention is not limited thereto.

110, 210: control unit 120, 220: driving circuit
130, 230: load

Claims (5)

1. A load driving apparatus comprising a drive circuit (drive IC) provided with a control section and an FET,
Internal power supply (VBR);
A pull-up resistor R1 having one end connected to the internal power supply and the other end connected to a drain of the FET; And
And a switching unit for selectively flowing the diagnostic current of the control unit through the pull-up resistor unit when the FET is in a turn off state,
And the resistance value of the pull-up resistor section is smaller than the impedance value of the external load.
delete The method according to claim 1,
The switching unit may include a transistor T1 having a base connected to the output terminal of the control unit, an emitter connected to the pull-up resistor unit, and a collector connected to the internal power supply unit, A load driving device.
The method according to claim 1 or 3,
And a leakage current interruption unit for interrupting a leakage current generated by a potential difference between an external power supply and an internal power supply supplied from the internal power supply unit.
5. The method of claim 4,
Wherein the leakage current cut-off portion is constituted by a diode element disposed between the other side of the pull-up resistor and the external load.
KR1020150178574A 2015-12-14 2015-12-14 Load driving device KR101795184B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150178574A KR101795184B1 (en) 2015-12-14 2015-12-14 Load driving device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150178574A KR101795184B1 (en) 2015-12-14 2015-12-14 Load driving device

Publications (2)

Publication Number Publication Date
KR20170070941A KR20170070941A (en) 2017-06-23
KR101795184B1 true KR101795184B1 (en) 2017-11-08

Family

ID=59283423

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020150178574A KR101795184B1 (en) 2015-12-14 2015-12-14 Load driving device

Country Status (1)

Country Link
KR (1) KR101795184B1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006319530A (en) * 2005-05-11 2006-11-24 Nissan Motor Co Ltd Switch input circuit and its current control method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006319530A (en) * 2005-05-11 2006-11-24 Nissan Motor Co Ltd Switch input circuit and its current control method

Also Published As

Publication number Publication date
KR20170070941A (en) 2017-06-23

Similar Documents

Publication Publication Date Title
US8054106B2 (en) Load driving device
JP6197685B2 (en) Gate drive circuit
JP5383426B2 (en) Rapid discharge circuit when abnormality is detected
JP5274824B2 (en) Power supply control circuit
JP5486396B2 (en) Load drive circuit
JP5274823B2 (en) Power supply control circuit
JP5759831B2 (en) Power semiconductor device and operation method thereof
JP4438608B2 (en) H-bridge circuit drive device and H-bridge circuit protection method
JP6237952B2 (en) Internal power supply circuit and semiconductor device
JP2007243585A (en) Drive circuit of power device
JP5252055B2 (en) Load drive device
KR101795184B1 (en) Load driving device
WO2020217780A1 (en) Load driving device
KR102382253B1 (en) Driver circuit for main transistor and control device including the same
JP6572123B2 (en) Gate drive circuit
JP4479570B2 (en) Switching circuit with protection function and protection circuit
US7369392B2 (en) Circuit for preventing simultaneous on operations
JP5423482B2 (en) Semiconductor latch relay
JP6668474B2 (en) Electronic control unit
JP2007209121A (en) Power system
JP2016192838A (en) Sensor device
JP2019189144A (en) Electronic control device
US11502684B1 (en) Driver safe operating area protection with current and temperature compensated trigger circuit
US11881850B2 (en) Driving apparatus
JP2007140650A (en) Integrated circuit for series regulator

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant