TLE6251DS is a LIN (Local Area Internet Network) bus transceiver commonly used in the field of automotive electronics. The LIN bus is a serial communication protocol used for low-speed communication in automotive electronic systems. It is mainly used to connect different control units in the vehicle, such as engine control units, sensors, instrument panels, etc.

 

Ⅰ.Main parameters of TLE6251DS

•Series:TLE6251
•Type:CAN Controller
•Installation style:SMD/SMT
•Package/Case:DSO
•Data rate:1Mb/s
•Supply voltage-Minimum:4.75 V
•Supply voltage-Max:5.25 V
•Minimum operating temperature:-40℃
•Maximum operating temperature:+150℃
•Package:Reel
•Packaging:Cut Tape
•Humidity Sensitivity:Yes
•Number of transceivers:1
•Operating power supply voltage:5 V
•Product type:CAN Interface IC
•Length:5 mm
•Width:4 mm
•Height:1.45 mm
•Qualification:AEC-Q100

 

Ⅱ.Features of TLE6251DS

•No bus load in standby mode

•Wake-up signal via RxD change

•Supports 12V and 24V automotive applications

•Usually equipped with short circuit and overheating protection

•Digital inputs compatible with 3.3 and 5V logic devices

•CAN data transfer rates up to 1 Mbaud

•Usually designed with high anti-EMC performance to reduce the impact of electromagnetic interference.

•Some LIN bus transceivers have automatic baud rate adjustment function, allowing them to adapt to different communication rates

•TLE6251DS usually has low power consumption characteristics, which helps to reduce power consumption in vehicles and meets the energy-saving requirements of automotive electronic systems.

•Devices are usually equipped with fault diagnosis functions that can detect faults on the LIN bus, including open circuits, short circuits, etc., and transmit relevant information to the system, helping to quickly locate and solve problems.

Ⅲ.Pin layout of TLE6251DS

 

•Pin1(TxD):CAN transmit data input;20 kΩ pull-up,LOW in dominant state

•Pin2(GND):Ground

•Pin3(Vcc):5V supply input;block to GND with 100 nF ceramic capacitor

•Pin4(RxD):CAN receive data output;LOW in dominant state

•Pin5(SPLIT):Split termination output;to support the recessive voltage level of the bus lines

•Pin6(CANL):Low line input;LOW in dominant state

•Pin7(CANH):High line output;HIGH in dominant state

•Pin8(STB):Mode control input;internal pull-up

 

Ⅳ.Application fields of TLE6251DS

1.Automotive electronic control system: TLE6251DS is usually used to connect and communicate with different control units in vehicle electronic control systems, such as engine control units (ECU), braking systems, air conditioning systems, etc. The following is a detailed description of the specific application of TLE6251DS in automotive electronic control systems:

•Engine control unit (ECU): ECU is the "brain" of the automobile engine. It is responsible for receiving various sensor signals, calculating and controlling the engine's ignition, fuel injection and other operations based on these signals. The TLE6251DS can communicate with the ECU to ensure the engine can respond correctly to vehicle operation and sensor signals.

•Air conditioning system: The control unit in the automobile air conditioning system can communicate with the TLE6251DS through the LIN bus to realize automatic adjustment of parameters such as temperature, humidity, and air flow to provide a comfortable driving environment.

•Brake system: The control unit in the brake system can be connected to the TLE6251DS through the LIN bus to transmit brake pedal position, brake pressure and other information in real time, thereby making the braking response more rapid and accurate.

•Sensors: There are many sensors in cars to monitor various parameters such as vehicle speed, fuel level, water temperature, etc. These sensors can be connected to the TLE6251DS via the LIN bus to transmit the detected data to the corresponding control unit.

•Dashboard: The dashboard displays various information about the vehicle, such as vehicle speed, fuel consumption, engine status, etc. Via the LIN bus, the instrument panel can communicate with the TLE6251DS, receiving and displaying data from other control units.

2.Car entertainment system: In the car entertainment system, TLE6251DS can indeed play the role of connecting different entertainment control units, thereby ensuring stable communication between audio and video devices. The following are the specific uses of TLE6251DS in vehicle entertainment systems:

(1)Video equipment interconnection:
•Camera: In the reversing imaging system or driving recorder, TLE6251DS can connect the camera and transmit the video signal to the display screen in real time.
•Display screen: TLE6251DS can be connected to a vehicle display screen, such as a center console display or a rear seat entertainment display, to ensure stable transmission of video signals.

(2)Audio equipment interconnection:
•Audio system: TLE6251DS can be connected to the audio system in the vehicle, including main audio, surround audio, etc., to realize the transmission and control of audio signals.
•Microphone: In car karaoke or voice interaction systems, TLE6251DS can ensure communication between the microphone and the host, allowing the driver or passenger to sing or give instructions clearly.

(3)Signal format conversion and enhancement: In some cases, audio or video signals may require format conversion or enhancement. TLE6251DS can cooperate with the signal processing chip to ensure accurate transmission and optimization of signals.

3.Instrument panel: TLE6251DS plays a key communication role in the automotive instrument panel system. The instrument panel is a very important part of the car. It is responsible for displaying various information about the vehicle, such as vehicle speed, engine speed, fuel consumption, etc. Through the LIN bus, various control units in the instrument panel system can communicate with each other, and TLE6251DS is the key component to achieve this communication.

4.Lighting system: LIN bus is also commonly used in vehicle lighting systems, such as headlight control, fog light control, etc. TLE6251DS can play a role in these systems.

5.Body control module: The body control module is a very important part of modern cars. It is responsible for implementing various body control functions, such as door lock control, window control, seat adjustment, etc. In order to achieve these functions, the body control module usually uses the LIN bus to communicate with each controlled component. As a transceiver on the LIN bus, TLE6251DS plays a vital role in the body control module.

6.Motor control: In electric vehicles or hybrid vehicles, the motor controller is a key component, which is responsible for controlling the start, stop, direction and power of the motor. In these vehicles, the LIN bus is a common communication protocol used to connect and control individual motor controllers. As a transceiver on the LIN bus, TLE6251DS plays a key role in the motor control system.

7.Seat control: In cars, the seat control module is an electronic control unit that implements seat adjustment, heating, ventilation and other functions. In order to realize these functions, the LIN bus is usually used to communicate between seat control modules. The following are the main applications of TLE6251DS in seat control modules:

(1)Seat heating and ventilation control:
•In cold weather, the seat heating function can help passengers warm up quickly and stay comfortable. Through the LIN bus, the driver or passenger can turn on or off the seat heating, and the TLE6251DS ensures the accurate transmission and execution of instructions.
•Seat ventilation function can provide ventilation effect for passengers to help wick away perspiration and maintain comfort. Similarly, through the LIN bus, seat ventilation can be turned on or off, and the TLE6251DS ensures the accurate transmission and execution of instructions.

(2)Seat adjustment control:
•Seat position adjustment: The driver or passenger can adjust the front and back position of the seat, backrest angle, etc. through the control panel. These adjustment instructions are sent to the seat control module through the LIN bus, and the TLE6251DS ensures the accurate transmission and execution of the instructions.
•Seat memory function: Many vehicles have seats with memory functions that remember the driver or passenger's seating position preference. When the driver or passenger adjusts the seat position, the seat control module stores the adjustment data in the memory through the LIN bus. TLE6251DS can ensure the accurate transmission and storage of these data.

8.Safety system: In the automobile safety system, the anti-lock braking system (ABS) and air bag system are very critical components. These systems are critical to improving a vehicle's active and passive safety.

 

Ⅴ.Absolute Maximum Ratings of TLE6251DS

 

Ⅵ.Will power supply noise or fluctuation affect the normal operation of TLE6251DS?

•Power supply noise or fluctuations may affect the normal operation of the TLE6251DS. A stable and clean power supply is a key factor in ensuring the normal operation of LIN bus transceivers. The following are some power supply related issues that may affect the TLE6251DS:

1.Power supply voltage stability: LIN bus transceivers have higher requirements for power supply voltage stability. If the power supply voltage is unstable, it may cause communication problems or other abnormal behavior.

2.Power supply voltage range: Ensure that the power supply voltage provided to TLE6251DS is within the allowed range. Supply voltage fluctuations or out-of-spec ranges may cause performance issues or device damage.

3.Power supply current: Ensure that the power supply system can provide sufficient current to meet the needs of the TLE6251DS. Insufficient supply current may result in degraded performance or unstable communications.

4.Power supply voltage fluctuations and noise: The LIN bus is a serial communication protocol that operates at a low level and is very sensitive to noise and fluctuations in the power supply voltage. This may cause communication errors or malfunctions.

•Steps to solve problems that affect the normal operation of TLE6251DS:

1.Use a power supply filter: Use an appropriate filter at the power input to reduce high-frequency noise in the power supply.

2.Use a stable power supply: Ensure that the power supply system provides stable power supply voltage to avoid voltage fluctuations and noise.

3.Use appropriate power supply capacitors: Adding appropriate power supply capacitors can help stabilize the supply voltage and reduce transient fluctuations.

4.Ensure grounding quality: Good grounding is the key to preventing ground wire noise. Make sure the ground wire is well connected to reduce the impedance of the ground loop.

Ⅶ.Electrical Characteristics of TLE6251DS

 

Frequently Asked Questions

1.Will the performance of TLE6251DS be affected by environmental conditions?
Yes, the performance of the TLE6251DS may be affected by environmental conditions. Automotive electronic systems often operate under complex environmental conditions, including temperature changes, humidity, vibration, etc.

2.How can TLE6251DS be configured for specific applications?
TLE6251DS can be configured through settings such as LIN bus baud rate, operating mode, current limits, fault diagnosis parameters, and other specific features. Configuration is typically done using I2C or SPI interfaces.

3.Can TLE6251DS operate in harsh automotive environments?
Yes, TLE6251DS is designed to operate in harsh automotive environments, including wide temperature ranges and challenging conditions such as those found in an engine compartment.

4.How does TLE6251DS handle fault diagnosis on the LIN bus?
TLE6251DS typically comes equipped with fault diagnosis features, allowing it to detect faults on the LIN bus, such as open circuits or short circuits, and communicate relevant information to the system.