Integrated Power Phototriac Eliminates Need for Separate Power TRIAC

(Product News, 28 Aug 2008)

Vishay Intertechnology Inc. has released an integrated power phototriac that outputs currents up to 1A to drive resistive and inductive loads. Offered in the 16-pin DIP package, the VO3526 consists of a GaAs infrared LED that is optically coupled to a monolithic photosensitive non-zero-crossing TRIAC detector chip. This in turn powers on an integrated power TRIAC. By eliminating the need for an external power TRIAC, the device cuts design costs and saves board space.

Rated at 600V blocking voltage, the power phototriac can provide isolation between DC and AC voltages on 120V and 240V AC lines, giving designers a 2X or better safety factor. For additional safety, the device offers an input-to-output isolation voltage of 5.3kV. A low 10mA input trigger current facilitates an easy interface with digital logic.

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