These Conductive Couplers Can Improve I/O Circuit Isolation


  • According to Renesas, all the photocouplers are capable of delivering RMS voltage of up to 5000 V on input-output(I/O) ports
  • To provide flexibility, these modules undergo infrared reflow soldering for up to three times

When photocouplers are used as switching devices, the phototransistor on the output side operates simply as a switch. In general terms, photocouplers are used in devices which produces both ac and dc signal. These couplers are used to provide isolations between the input and output side.

Renesas has recently announced five 8.2mm creepage photocouplers. The RV1S92xxA and RV1S22xxA photocouplers feature a package width of up to 2.5mm. These two couplers are used in different application areas. They can work over an operating voltage of up to 200 Volt and 400 Volt respectively.

Space-saving for mounted components 

The RV1S9260A is a communication coupler. It can provide a transmission speed of up to 15 Mbps. RV1S9213A, on the Photocouplersother hand, is an intelligent power module driver. It uses an LSSO5 package having a pin pitch of 0.65 mm. Both the modules come in a package height of up to 2.1mm. These parts can be directly mounted on the backside of a PCB. This helps in space-saving for topside mounted components.



According to Renesas, these modules undergo infrared reflow soldering for up to three times. This process provides improved flexibility to the modules. RV1S2281A and RV1S2211A are dc input and low output photocouplers. On the other hand, RV1S2285A is an ac input, transistor output coupler.

Offers high electric isolation

RV1S92xxA photocouplers have higher electric isolation and low CMR noise rejection ratio.  When transferring high-speed signals, this isolation protects low voltage microcontrollers from high voltage circuits.

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Offers port pin of up to 1.30mm pitch

These products are said to be designed to operate in harsh environments. They come in an LSSOP package. The pin pitch for these modules is of up to 1.30mm. The company informed that all five photocouplers are capable of delivering RMS voltage of up to 5000 V. These devices also feature reinforced isolation over high operating temperatures.

All five devices follow UL61800-5-1 standards for fabricating motor drive equipment. It also fulfils the UL61010-2-201 standard for control system devices.

Philip Chesley is the vice president of industrial analogue and power business division at Renesas. In a recent interaction, he told about the product saying,

The RV1S92xxA and RV1S22xxA photocouplers give designers a variety of functions and the layout flexibility to significantly reduce equipment size and maximize factory floor space”.

With all these features, these devices can be a better alternative to present applications using photocouplers. These couplers are suitable, but not limited to dc-ac power inverters, ac servo motors, PLCs, robotic arms, solar inverters, and battery storage and charging systems.



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