CN212410712U - ACC detection and power control circuit - Google Patents
ACC detection and power control circuit Download PDFInfo
- Publication number
- CN212410712U CN212410712U CN201922041640.8U CN201922041640U CN212410712U CN 212410712 U CN212410712 U CN 212410712U CN 201922041640 U CN201922041640 U CN 201922041640U CN 212410712 U CN212410712 U CN 212410712U
- Authority
- CN
- China
- Prior art keywords
- voltage
- resistor
- acc
- dividing point
- vehicle
- 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
Links
Images
Landscapes
- Electronic Switches (AREA)
Abstract
A kind of ACC detects and power control circuit, the 12V power of vehicle divides the voltage through the second voltage dividing point that resistance III and resistance IV form in series, the voltage of the second voltage dividing point is 3V, the first voltage dividing point controls the voltage state of the second voltage dividing point through N-MOS pipe, when the ACC end of the vehicle is put through, the 12V or 24V voltage that ACC outputs 1 circuit power control signal through the diode with unidirectional characteristic, can control the vehicle electric equipment to electrify, when the first voltage dividing point exceeds the grid turn-on voltage of N-MOS pipe, the drain and source of N-MOS pipe are conducted, the second voltage dividing point is grounded at this moment, the voltage becomes zero, at this moment, it is the low level, when the first voltage dividing point is lower than the grid turn-on voltage of N-MOS pipe, the drain and source of N-MOS pipe are not conducted, the second voltage dividing point voltage is 3V, it is the high level, judge the ACC when the ACC end of vehicle is put through whether the high level signal or the low level signal that Voltage status. Ensuring that a reset of the associated system MCU is not caused.
Description
Technical Field
The utility model relates to an automobile circuit technical field, concretely relates to ACC detects and power control circuit.
Background
In a car, ACC refers to a device that uses less electricity if a key is used to set the key to an ACC gear before the car is started, such as: the radio, the cigarette lighter and the like are electrified, when the automobile is ignited, a strong current is needed, the ACC stops supplying power, and the power supply is started after the ignition of the automobile is finished. Just because the car ignition needs a strong current, the interference is great, if the ACC detection circuit design is not reasonable, can lead to its relevant system MCU reset.
Disclosure of Invention
The utility model discloses a overcome not enough of above technique, provide a compatible 12V and 24V, the adaptability is wider, can be under the circumstances of the electricity was gone up earlier to the ACC, the ACC detection and the power control circuit of other modules of control system electricity again.
The utility model overcomes the technical scheme that its technical problem adopted is:
an ACC detection and power control circuit comprising:
the negative electrode of the diode is connected with the vehicle electric equipment, the positive electrode of the diode is respectively connected with a resistor I and a resistor II, the other end of the resistor I is connected with an ACC end of the automobile key, the other end of the resistor II is grounded, and a first voltage division point is formed between the resistor I and the resistor II;
the grid electrode of the N-MOS tube is connected to the first voltage division point, the substrate and the source electrode of the N-MOS tube are grounded, the drain electrode of the N-MOS tube is connected to the resistor III, the other end of the resistor III is connected with a vehicle 12V power supply, and a second voltage division point is formed between the drain electrode of the N-MOS tube and the resistor III; and
and one end of the resistor IV is connected to the region between the second voltage division point and the resistor III, and the other end of the resistor IV is grounded.
In order to protect the N-MOS tube, one end of the TVS diode is grounded, and the other end of the TVS diode is connected with the first voltage division point and the grid electrode of the N-MOS tube.
The utility model has the advantages that: the 12V power supply of the vehicle is divided by a second voltage division point formed by a resistor III and a resistor IV which are connected in series, the voltage of the second voltage division point is 3V, the first voltage division point controls the voltage state of the second voltage division point through an N-MOS tube, when the ACC end of the vehicle key is connected, the 12V or 24V voltage output by the ACC outputs 1-path power supply control signal through a diode with one-way characteristic, the power supply of the electric equipment of the vehicle can be controlled, when the first voltage division point exceeds the grid starting voltage of the N-MOS tube, the drain electrode and the source electrode of the N-MOS tube are conducted, at the moment, the second voltage division point is grounded, the voltage becomes zero, at the moment, the second voltage division point is low level, when the first voltage division point is lower than the grid starting voltage of the N-MOS tube, the drain electrode and the source electrode of the N-MOS tube are not conducted, the second voltage is 3V, the second voltage point is, the voltage state when the vehicle key ACC terminal is turned on can be determined by detecting whether the signal output is a high level signal or a low level signal. Ensuring that a reset of the associated system MCU is not caused.
Drawings
Fig. 1 is a schematic diagram of the circuit structure of the present invention;
in the figure, 1, a diode 2, a resistor I3, a resistor II 4, a first voltage division point 5, an N-MOS transistor 6, a TVS diode 7, a resistor III 8, a resistor IV 9 and a second voltage division point.
Detailed Description
The present invention will be further explained with reference to fig. 1.
An ACC detection and power control circuit comprising: the negative electrode of the diode 1 is connected with vehicle electric equipment, the positive electrode of the diode is respectively connected with a resistor I2 and a resistor II 3, the resistor I2 and the resistor II 3 form serial voltage division, the other end of the resistor I2 is connected with an ACC end of an automobile key, the other end of the resistor II 3 is grounded, and a first voltage division point 4 is formed between the resistor I2 and the resistor II 3; the grid electrode of the N-MOS tube 5 is connected to the first voltage division point 4, the substrate and the source electrode of the N-MOS tube are grounded, the drain electrode of the N-MOS tube is connected to the resistor III 7, the other end of the resistor III 7 is connected with a vehicle 12V power supply, and a second voltage division point 9 is formed between the drain electrode of the N-MOS tube 5 and the resistor III 7; and one end of the resistor IV 8 is connected to the region between the second voltage division point 9 and the resistor III 7, the other end of the resistor IV 8 is grounded, and the resistor IV 8 and the resistor III 7 form a series connection relation. The 12V power of the vehicle is divided by a second voltage dividing point 9 formed by a resistor III 7 and a resistor IV 8 which are connected in series, the voltage of the second voltage dividing point is 3V, the first voltage dividing point 4 controls the voltage state of the second voltage dividing point by an N-MOS tube 5, when a vehicle key ACC is connected, the 12V or 24V voltage output by the ACC outputs 1 circuit power control signal by a diode 1 with unidirectional characteristic, the power on of the electric equipment of the vehicle can be controlled, when the voltage of the first voltage dividing point exceeds the grid opening voltage of the N-MOS tube 5, the drain electrode and the source electrode of the N-MOS tube 5 are conducted, the second voltage dividing point is grounded, the voltage becomes zero, the low level is obtained, when the voltage of the first voltage dividing point is lower than the grid opening voltage of the N-MOS tube 5, the drain electrode and the source electrode of the N-MOS tube 5 are not conducted, the voltage of the second voltage point is 3V, the high level is obtained, the second voltage, i.e., the ACC detection signal terminal, the voltage state at which the vehicle key ACC terminal is turned on can be determined by whether the detection signal outputs a high level signal or a low level signal. Ensuring that a reset of the associated system MCU is not caused.
Furthermore, the device also comprises a TVS diode 6, wherein one end of the TVS diode is grounded, the other end of the TVS diode is connected with the first voltage division point 4 and the grid electrode of the N-MOS tube 5, and the TVS diode 6 and the resistor II 3 form parallel connection. TVS diode 6 acts as a protection device for N-MOS transistor 5, preventing the damage to N-MOS transistor 5 caused by the sudden change of ACC voltage.
Claims (2)
1. An ACC detection and power control circuit, comprising:
the negative electrode of the diode (1) is connected with the vehicle electric equipment, the positive electrode of the diode is respectively connected with a resistor I (2) and a resistor II (3), the other end of the resistor I (2) is connected with an ACC end of an automobile key, the other end of the resistor II (3) is grounded, and a first voltage division point (4) is formed between the resistor I (2) and the resistor II (3);
the grid electrode of the N-MOS tube (5) is connected to the first voltage division point (4), the substrate and the source electrode of the N-MOS tube are grounded, the drain electrode of the N-MOS tube is connected to the resistor III (7), the other end of the resistor III (7) is connected with a vehicle 12V power supply, a second voltage division point (9) is formed between the drain electrode of the N-MOS tube (5) and the resistor III (7), and the second voltage division point (9) divides the voltage of the vehicle 12V power supply into 3V; and
and one end of the resistor IV (8) is connected to the region between the second voltage division point (9) and the resistor III (7), and the other end of the resistor IV (8) is grounded.
2. The ACC detection and power control circuit of claim 1, wherein: one end of the TVS diode (6) is grounded, and the other end of the TVS diode is connected with the first voltage division point (4) and the grid electrode of the N-MOS tube (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922041640.8U CN212410712U (en) | 2019-11-25 | 2019-11-25 | ACC detection and power control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922041640.8U CN212410712U (en) | 2019-11-25 | 2019-11-25 | ACC detection and power control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212410712U true CN212410712U (en) | 2021-01-26 |
Family
ID=74401904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922041640.8U Active CN212410712U (en) | 2019-11-25 | 2019-11-25 | ACC detection and power control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212410712U (en) |
-
2019
- 2019-11-25 CN CN201922041640.8U patent/CN212410712U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105656122B (en) | A kind of DC-DC converter for new-energy automobile | |
| CN102490670A (en) | Power supply control circuit and method for electronic control unit | |
| CN105438001B (en) | Charging pile accessory power supply output control method and system | |
| CN202088904U (en) | Off-delay system for motor vehicles | |
| CN212410712U (en) | ACC detection and power control circuit | |
| CN205544261U (en) | Powered storage battery joins conversely monitoring devices | |
| CN204249952U (en) | A kind of vehicle power control circuit and automobile | |
| CN203119467U (en) | Overvoltage protection circuit for vehicular electrical equipment | |
| CN202710982U (en) | Automobile safety device | |
| CN204517657U (en) | A kind of electric vehicle rotary parallel operation of having electronic insurance circuit | |
| CN201032687Y (en) | Triggering type power supply switching mechanism for cars | |
| CN113119732A (en) | Power supply control method and system and new energy automobile | |
| CN110539641B (en) | Low-voltage early warning and automatic power-off protection circuit of vehicle-mounted storage battery | |
| CN202325967U (en) | Double-wire plug-in starting protection device | |
| CN202502423U (en) | Temperature control circuit used in DC-DC direct current converter | |
| CN208369236U (en) | A kind of Overdischarge protection device for storage battery and automobile | |
| CN202421460U (en) | Motor locked-rotor detection device of vehicle | |
| CN206644765U (en) | 360 degree of panorama low-voltage protection circuits of automobile | |
| CN206309521U (en) | A kind of detection circuit of automotive ignition launch state | |
| CN105553253A (en) | Power conversion circuit for driving vehicle-mounted low-frequency antenna | |
| CN205686345U (en) | The various electric supply installation of automobile | |
| CN216056393U (en) | Charging control circuit | |
| CN104579112A (en) | Auxiliary power controller used for electric automobile | |
| CN203722215U (en) | A storage battery under-voltage protection device for railway vehicles | |
| CN103633837A (en) | DC-DC circuit used for low-voltage working condition of vehicle electronic control unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |