CN215361527U - Circuit for reducing quiescent current loss of controller of electric power steering system - Google Patents
Circuit for reducing quiescent current loss of controller of electric power steering system Download PDFInfo
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- CN215361527U CN215361527U CN202120898119.0U CN202120898119U CN215361527U CN 215361527 U CN215361527 U CN 215361527U CN 202120898119 U CN202120898119 U CN 202120898119U CN 215361527 U CN215361527 U CN 215361527U
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Abstract
The utility model relates to the technical field of power electronics, in particular to a circuit for reducing the static current loss of a controller of an electric power steering system, which comprises a board-level power supply chip, a field effect tube, a battery, a resistor, a capacitor, a voltage regulator tube and a triode. The utility model does not need an additional relay and has the advantages of low cost and small volume.
Description
Technical Field
The utility model relates to the technical field of power electronics, in particular to a circuit for reducing quiescent current loss of a controller of an electric power steering system.
Background
The traditional way to reduce static loss is mainly: the main loop is connected with the relay to reduce static loss.
The main loop access relay static loss reduction circuit has the following defects: the whole loop needs to be closed, and the relay is high in cost and large in size.
Therefore, it is desirable to design a low-cost, small-sized circuit for reducing the quiescent current loss of the controller of the electric power steering system.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provides a circuit which is low in cost and small in size and can reduce the quiescent current loss of a controller of an electric power steering system.
In order to achieve the above object, the present invention provides a circuit for reducing quiescent current loss of a controller of an electric power steering system, comprising a board-level power supply chip, a field effect transistor, a battery, a resistor, a capacitor, a voltage regulator tube, and a triode, wherein the positive electrode of the battery is divided into four paths and is respectively connected with the VS1 pin of the board-level power supply chip, the cathode of the voltage regulator tube, one end of a second divider resistor, and the source of the field effect transistor, the drain of the field effect transistor is connected with one end of an output capacitor, the base electrode of the field effect transistor is divided into four paths and is respectively connected with the anode of the voltage regulator tube, one end of the first divider resistor, the other end of the second divider resistor, and the other end of the output capacitor, the other end of the first divider resistor is connected with the collector of the triode, the base electrode of the triode is divided into two paths and is respectively connected with one end of a bias resistor and one end of a driving resistor, the other end of the driving resistor is connected with the QUC pin of the board-level power supply chip, the emitter of the triode, the other end of the bias resistor, the cathode of the battery, the BSG pin of the board-level power supply chip, the PG1 pin and the PG2 pin are grounded, and the WAK pin of the board-level power supply chip is connected with the ignition signal end.
The model of the board-level power supply chip is TLF 35584.
The model of the field effect transistor is BSS 84P.
The model of the voltage-stabilizing tube is BZX 84J-C15.
The type of the triode is BC 817.
Compared with the prior art, the circuit for reducing the static current loss of the controller of the electric power steering system is designed, the output voltage of the chip is closed by utilizing the sleep mode of the board-level power supply chip, the triode is cut off, the field effect tube on the main loop is cut off, and the static loss is reduced. The utility model does not need an additional relay and has the advantages of low cost and small volume.
Drawings
Fig. 1 is a circuit diagram of the present invention.
Detailed Description
The utility model will now be further described with reference to the accompanying drawings.
Referring to fig. 1, the circuit for reducing the quiescent current loss of the controller of the electric power steering system of the present invention comprises a board-level power supply chip, a field effect transistor, a battery, a resistor, a capacitor, a voltage regulator tube and a triode, wherein KL30 of the positive electrode of the battery is divided into four paths which are respectively connected with a VS1 pin of the board-level power supply chip 1, a cathode of a voltage regulator tube D3, one end of a second divider resistor R4 and a source of the field effect transistor Q2, a drain of the field effect transistor Q2 is connected with one end of an output capacitor C1, four paths of a base of the field effect transistor Q2 are respectively connected with an anode of the voltage regulator tube D3, one end of a first divider resistor R3, the other end of a second divider resistor R4 and the other end of an output capacitor C1, the other end of the first divider resistor R3 is connected with a collector of the triode Q1, two paths of a base of the triode Q1 are respectively connected with one end of a bias resistor R2 and one end of a driving resistor R1, the other end of the driving resistor R1 is connected with a QUC pin of the board-level power supply chip 1, an emitting electrode of the triode Q1, the other end of the bias resistor R2, a negative electrode KL31 of the battery, a BSG pin, a PG1 pin and a PG2 pin of the board-level power supply chip 1 are grounded, and a WAK pin of the board-level power supply chip 1 is connected with an ignition signal end KL 5.
In the utility model, the model of the board-level power supply chip 1 is TLF 35584. The model of the field effect transistor Q2 is BSS 84P. The model number of the voltage-stabilizing tube D3 is BZX 84J-C15. The transistor Q1 has a model number BC 817.
When the ignition circuit works, when the battery voltage is connected and the KL15 of an ignition signal end is at a high level, the board-level driving chip 1 normally outputs voltage from a QUC pin, and after the voltage is divided by resistors, the triode Q1 is driven to conduct the triode Q1. The battery voltage forms a conducting loop through the second voltage division resistor R4, the first voltage division resistor R3 and the triode Q1, a voltage drop is formed on the second voltage division resistor R4, the field effect transistor Q2 on the main loop is conducted, and the voltage V + is output.
When the battery voltage is connected and the ignition signal end KL15 is at a low level, the board-level driving chip 1 enters the sleep mode, the pin QUC of the board-level driving chip 1 does not output voltage, the triode Q1 is cut off, no voltage drop is formed on the second voltage-dividing resistor R4, the field effect transistor Q2 on the main loop is cut off, and the main loop does not output voltage. The current of the static loss at this time is only the static consumption current of the board-level driver chip 1, and is only 70 uA.
The utility model designs a circuit for reducing the static current loss of the controller of the electric power steering system, and utilizes the sleep mode of the board-level power supply chip 1 to close the output voltage of the chip, cut off the triode Q1, cut off the field effect transistor Q2 on the main loop, and cut off the main loop, thereby realizing the reduction of the static loss. The utility model does not need an additional relay and has the advantages of low cost and small volume.
Claims (5)
1. The utility model provides a reduce circuit of electric power assisted steering system controller quiescent current loss, includes board level power supply chip, field effect transistor, battery, resistance, electric capacity, stabilivolt, triode, its characterized in that: the positive electrode (KL 30) of the battery is divided into four paths to be respectively connected with a VS1 pin of the board-level power supply chip (1), the cathode of a voltage regulator tube (D3), one end of a second divider resistor (R4) and the source of a field effect tube (Q2), the drain of the field effect tube (Q2) is connected with one end of an output capacitor (C1), the base of the field effect tube (Q2) is divided into four paths to be respectively connected with the anode of the voltage regulator tube (D3), one end of a first divider resistor (R3), the other end of the second divider resistor (R4) and the other end of the output capacitor (C1), the other end of the first divider resistor (R3) is connected with the collector of a triode (Q1), the base of the triode (Q1) is respectively connected with one end of a bias resistor (R2) and one end of a driving resistor (R1), the other end of the emitter of the driving resistor (R1) is connected with a QUC pin of the board-level power supply chip (1), and the emitter of the Q1) is respectively connected with the source of the transistor (Q382), The other end of the bias resistor (R2), the negative electrode (KL 31) of the battery, the BSG pin, the PG1 pin and the PG2 pin of the board-level power supply chip (1) are grounded, and the WAK pin of the board-level power supply chip (1) is connected with an ignition signal end (KL 5).
2. The circuit for reducing the quiescent current loss of the controller of the electric power steering system according to claim 1, wherein: the board-level power supply chip (1) is TLF 35584.
3. The circuit for reducing the quiescent current loss of the controller of the electric power steering system according to claim 1, wherein: the model of the field effect transistor (Q2) is BSS 84P.
4. The circuit for reducing the quiescent current loss of the controller of the electric power steering system according to claim 1, wherein: the model of the voltage-stabilizing tube (D3) is BZX 84J-C15.
5. The circuit for reducing the quiescent current loss of the controller of the electric power steering system according to claim 1, wherein: the model of the triode (Q1) is BC 817.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120898119.0U CN215361527U (en) | 2021-04-28 | 2021-04-28 | Circuit for reducing quiescent current loss of controller of electric power steering system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120898119.0U CN215361527U (en) | 2021-04-28 | 2021-04-28 | Circuit for reducing quiescent current loss of controller of electric power steering system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215361527U true CN215361527U (en) | 2021-12-31 |
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ID=79628466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120898119.0U Active CN215361527U (en) | 2021-04-28 | 2021-04-28 | Circuit for reducing quiescent current loss of controller of electric power steering system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215361527U (en) |
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2021
- 2021-04-28 CN CN202120898119.0U patent/CN215361527U/en active Active
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