UART LIN CAN protocols over DC Power Lines Communication
The Problem
Wires are bulky, heavy and unrelaible.
Reducing bulky copper wires is a strategic goal of carmakers, airframers, smart cities lighting designers, and more.
The Solution
Power Line Communication
Yamar’s DC-BUS innovative transceiver ICs merge data/control wires over DC power lines to establish reliable UART, LIN, CAN and SPI protocol power line networks, addressing the EMI/EMC requirements.
Automotive
DC-BUS IC merge LIN, CAN protocols over power line
Aerospace
DC-BUS IC power line communication reduce many wires in airplanes
Renewal Energy
Managing lithium batteries over its high voltage power line using communication
Appliances
AC/DC power lines used to convey data within white goods products
Industrial
Lighting, airconditions, charging controled by using power line communication networks
SIG Family
UART and LIN transceivers over DC power lines at a maximum speed of 115.2Kbit/s using the unique signaling technology.
DCB Family
CAN, UART, SPI, I2C transceivers communicate over DC power lines at bit rates up to 1.4Mbit/s using the DC-BUS technology.
DC BUS technology merge Data over existing Direct Current (DC) power lines, like those used in every vehicle implemented in small silicon devices.
The uniqueness of the technology is the use of existing protocols such as UART, LIN, CAN bus for communication and the ability to mitigate with the hostile and noisy environment.
The cable length depends mainly on the impedance of loads connected to the power line in the frequency range of 10MHz.
A 10A motor is a small load (inductive), but a capacitor of 10nF is a high load. A reasonable distance is between 20m to 100m. The lower impedance power line will reduce the communication distance further more.
The SIG family transfer UART bytes over the power line byte by byte. Any number of bytes can be transferred. The modulation is multiple phase modulation. When operating as a network, a master-slave protocol such as LIN can be used.
The DCB family of devices are message oriented. The devices get a message of any length and transfer it over the power line to the receiving devices. The DCB family has CSMA/CR mechanism for network operation.
The interface with its ECU is via CAN, UART or SPI protocols.
The SIG family of devices operate up to 115.2Kbps. The DCB1M operates up to 1.4Mbps.
Yes. Two or more data buses can operate over the same power line using different carrier frequencies.
The DC-BUS devices were designed to operate on ordinary wires. Using low capacitance wire such as twisted pair cables, UTP improve the effective communication length and performance.
