Photocouplers claim highest accuracy

Renesas Electronics Corp. has launched a new family of optically isolated intelligent power module drivers (also called photocouplers), targeting industrial automation systems such as robotics control, AC servos, general-purpose inverters, and solar inverters. The company claims the new photocouplers deliver the industry’s best accuracy and power consumption in the smallest available package.

The 15-Mbits/s RV1S9x61A and RV1S9x62A photocouplers meet key requirements for industrial automation applications, including high accuracy and low power consumption. The photocouplers provide a propagation delay difference (PDD) of 25 ns. The low PDD enables designers to decrease dead time, which results in lower output voltage error, improving the accuracy of the inverter, said the company. The operating ambient temperature range is -40°C to 125°C.

The photocouplers also are said to deliver the industry’s highest common mode transient immunity (CMTI) of 100 kV/µsec. “High CMTI reduces the influence of noise generated by high-speed power devices that change voltages quickly,” said Renesas, which “reduces dead time and thereby decrease power consumption.”

The photocoupler family is comprised of six new devices including active high (RV1S9x61A) and active low (RV1S9x62A) versions in SO5, LSO5, and LSSO5 packages. Renesas’ new LSSO5 package, with a 0.65-mm pin pitch, is said to reduce mounting space by 35 percent versus competing devices.

Renesas also offers winning combination reference designs using the RV1S9x6xA for motor control solutions. One example is the  AC Drives/GP Inverters Solution design that also includes Renesas’ new RA6T2 and RX66T MCU optimized for motor control applications.

All six new RV1S9x6xA family photocouplers are available now. Here is the lineup:

(Source: Renesas)