UART, LIN, CAN, SPI, I2C, DMX over DC power line communication

Semiconductors that Save Wires

Products

DC-BUS devices for power line communication

SIG Family

UART and LIN transceivers over DC power lines at a maximum speed of 115.2Kbit/s using the unique signaling technology.

 

DC-BUS devices for power line communication

DCB Family

CAN, UART, SPI, I2C, DMX & RDM transceivers communicate over DC power lines at bit rates up to 1.4Mbit/s using the DC-BUS technology.

 

Applications

DC-BUS IC merge LIN and CAN protocols over power line
DC-BUS IC power line communication reduce many wires in airplanes
Managing lithium batteries over its high voltage power line using communication
Using power line communication in white goods
AC/DC power lines used to convey data within white goods products
DC power line communication in industrial applications
Lighting, air-conditions, charging controlled by using power line communication networks

The Problem

Wires are bulky, heavy and unreliable.

Reducing bulky copper wires is a strategic goal of carmakers, airframes, 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, SPI and I2C protocols power line networks, addressing the EMI/EMC requirements.

 

Yamar Power line communication

The DC-BUS technology enables network power line communication of Data, Voice, Music and Video by digital means over Direct Current (DC) battery power lines.

Yamar’s unique technology enables advanced digital communication in hostile and noisy environments such as on vehicle battery lines in a small size silicon device. Customers integrate the devices into modules utilizing their own application (e.g. within body and power train modules for in-vehicle multiplex communication networks). The DC-BUS is used in many non automotive applications too.

The same power line can be used for multiple independent networks by using different carrier frequencies.

Any of Yamar's PLC devices is coupled to powerline using a small footprint DC blocking capacitor, typically 2.2nF. The Ccoupling voltage rating depends on the powerline voltage and its expected impulses.

Any Power-supply has a filtering capacitors at its DC inputs. These capacitors attenuate strongly the PLC device carrier signal. It is recommended to add an inductor (>22uH) or ferrite bead (>100Ω @ 5MHz-30MHz) in series to the power-supply connection to the DC powerline to reduce the carrier signal attenuation.

 

The cable length depends mainly on AC loads impedance connected to the power line. A 10A motor is a small load, but a filtering capacitor of 10nF is a high load.

Yamar's proudct lines have selectable carrier frequencies in the range of 5MHz to 30MHz with TX output level of 1Vpp/2Vpp. and sensitivity of ~10mVpp. A typical distance is up to 100m.

For more application specific information, you can contact our support team.

The SIG family devices transfers UART/LIN bytes over the power line (Byte oriented transceiver). The data bytes are transferred each one separately over the power line with a fix latency of 2.5/4 bits. Any number of bytes can be transferred. The modulation is multiple phase shifts QPSK. When operating as a network, a master-slave protocol such as LIN can be used.

The DCB family devices are message oriented device. A message of any length is constructed into powerline frame/s and transferred over the power line to the receiving devices. The DCB family has CSMA & Arbitration built-in mechanism for multi-master network operation. The  DCB family devices enables seamless interfacing to UART/SPI/I2C/CAN protocols.

There is no physical limitation for the number of nodes, but in practice 16-32 nodes is a reasonable number.

Yamar's powerline communication (PLC) transceivers can interface with UART/LIN/CAN/SPI/I2C protocols. The idea is to enable seamless interfacing, proving a transparent physical layer to an existing common communication protocols. The integration of Yamar's PLC ICs is quick and simple, allowing plug & play solution for any application.

The SIG family devices operates up to 115.2Kbit/s. The DCB family devices operates up to 1.4Mbit/s.

Yes. Two or more data buses can operate over the same power line using different carrier frequencies. The SIG60 and SIG61  has 7 selectable carriers.The SIG102, DCAN500 and DCB1M has 251 selectable carriers.

We recommended that a “software” separator is added into the user’s protocol to avoid any leakage from one strong transmitter to another sensitive receiver using a different carrier, and vice versa.

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