High-speed photocouplers deliver 5-Mbps operation, 5-kV isolation at up to 125 degrees C
The TLP2955 and TLP2958 have a minimum isolation voltage of 5000 Vrms and support data rates up to 5 Mbps. Target applications include intelligent power module signal isolation, programmable logic controllers (PLCs) and high-speed digital interfaces for instrumentation and control devices.
Toshiba’s new photocouplers can accommodate a wide input range of 3 V to 20 V. This minimises the need for additional voltage conversion circuitry and ensures compatibility with 3.3 V power schemes. A maximum threshold input current of 1.6 mA keeps power consumption to a minimum.
The TLP2955 and TLP2958 feature, respectively, buffer logic and inverter logic totem pole output stages with current sourcing and sinking capabilities. Each device is built around a long-life GaAlAs LED coupled with a high-gain, high-speed photo detector. An internal Faraday shield provides guaranteed common mode transient immunity of ±20 kV/μs.
Package dimensions of 9.6 mm x 7.6 mm x 3.6 mm make the ICs ideal for high component density, space-limited designs. Despite their small size, the devices have guaranteed creepage and clearance distances of 7 mm and a minimum internal isolation thickness of 0.4 mm. As a result, they allow designers to comply with a wide range of international safety standards.
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