Solid state relays enable self-powered control in the IoT

The TS13102 solid state relay can autonomously harvest energy even when its switch is closed and without the assistance of an MCU. The harvested energy is stored in a system Capacitor (Csys) and can be shared across multiple channels in the system driving several loads simultaneously. The TS13103 is outfitted with a Power Transfer Output (PTO) pin to transfer the harvested energy on the other side of the isolation barrier to the controller of the system. This design allows for much smaller systems that can last decades without needing their batteries replaced. It also eliminates the need to include costly transformers and AC/DC power supplies with the system, which significantly reduces the BOM cost.

Both TS13102 and TS13103 relays have a new, enhanced communication scheme that allows the controller to send specific commands through the control line (CLK - for CLocK) to perform a variety of functions, including receiving diagnostic information. The control and feedback lines can be shared across multiple channels, greatly reducing the system MCU pin count. These latest additions to Semtech’s Neo-Iso product portfolio offer designers the benefit of significant board space savings and BOM cost savings compared to mechanical relays, as well as silent operation, diagnostic capability and a major Increase in the lifetime of the product.

Phil Daggett, Senior Marketing Director, Power and High Reliability Product Group, Semtech, commented:  “This is an exciting addition to our next generation Neo-Iso product line. By eliminating the need for an additional power supply for the microcontroller, the TS13102 and TS13103 solid state relays give designers energy harvesting capability in a space saving package that can be easily integrated into a wide range of IoT applications.”

TS13102 and TS13103 (order codes: TS13102-QFNR & TS13103-QFNR) are available immediately in production quantities and either are priced at $0.79 each in 1,000 unit quantities. Semtech offers comprehensive design assistance, including field- and factory-based support. Volume pricing and delivery quotes, as well as evaluation kits and samples, are available from Semtech.