CARROLLTON, Texas, Jan. 7, 2011 — Providing power electronics design engineers with a high-voltage optoisolator designed for use in harsh environments and explosion-proof applications, TT electronics Optek Technology has developed a series of UL- and VDE-rated models with 20-kV isolation, ≤50-ns propagation delay and 2-Mb/s data transmission rates. Designed to comply with ATEX and ICEex certifications for electrical equipment used in hazardous areas, as well as IP65 standards for environmental sealing, the OPI1268S Series high-speed optoisolators are designed for high-voltage power isolation in applications requiring sealing against dust and liquids, as well as in electrical equipment in potentially explosive atmospheres, such as transportation systems, hybrid vehicles, medical devices and industrial control/safety systems. The devices comprise a high-efficiency GaAIAs LED with a peak wavelength of 850 nm, optically coupled to a photodiode that detects incoming modulated light and converts it to a proportionate current. The high-gain linear amplifier is temperature-, current- and voltage-compensated, resulting in a highly stable digital output with an open collector inverter configuration that delivers DC and AC voltage isolation between the input and output circuitry while providing transistor-transistor logic signal integrity. The input diode exhibits a maximum forward voltage of 1.8 V at 20mA, with a continuous forward current of 50 mA. Maximum reverse current is 100µA at 2 V, with reverse voltage of 3 V. The output integrating circuit operates from a 7-V supply with 40-mW power dissipation. The devices can isolate voltages up to 20 kV, and creepage distance per air path is 24 mm. Operating temperature range is from -50 to 100 °C. The optoisolators measure 27.94 × 6.35 × 8.89 mm with a five-lead configuration (cathode, anode, Vcc, output and ground).