How to implement galvanic isolation for power and signal lines in high-voltage systems
The ISO1050EVM eval module with input and output connections and test points for key performance measurements can speed the integration of these devices into automotive systems. Isolated RS-485/RS-422 transceivers Systems that need a 500 kilobits per second (kbps) RS-485/RS-422 transceiver with 5 kV RMS isolation
can select from Texas Instruments’ half-duplex ISO1410BDWR or the full-duplex ISO1412BDWR (Figure 6). The SiO2 isolation barrier supports robust data transfer in the presence of large ground potential differences. These transceivers are rated for operation from -40 to 125 °C. The bus pins are designed to withstand high levels of electrostatic discharge (ESD) and electrical fast transient (EFT) events, eliminating the need for additional protection components.
Designers can use the ISO1410DWEVM and the
Conclusion Designers of high-voltage Industry 4.0, automotive, medical, green energy, and other systems need galvanic isolation to protect both devices and users, while meeting size, cost, and reliability requirements, along with associated safety standards. As shown, capacitive and magnetic galvanic isolation in power and signal lines can produce compact and high- performance solutions. These isolation technologies have high CMTIs and meet the requirements of IEC 60747-17 for reinforced isolation.
ISO1412DWEVM eval boards to evaluate various system parameters. Test signals and sequences can be applied, and performance characteristics like propagation delay, power consumption, and different bus and driver conditions can be evaluated.
Figure 6: The full-duplex ISO1412BDWR (top) and the half-duplex ISO1410BDWR (bottom) support 500 kbps data rates and feature 5 kV RMS isolation (vertical dashed line). (Image source: Texas Instruments)
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