Photocoupler shrinks for isolated switching
24 June 2008
Toshiba’s miniature photocoupler has an isolation voltage of 3.75kV and more than doubles switching speeds.
The TLP117 has a high-speed GaA1As infra red LED and a high-speed photodetector, packaged in a surface mount MFSOP6 package, measuring 4.4mm x 3.6mm x 2.5mm.
The maximum propagation delay can be as low as 20nsec, for typical switching speeds of 50Mbit/sec. The photocoupler can be used for logic applications including high-speed interfaces in factory automation as well as in logic systems in plasma panel displays and digital home appliances.
The device has an operating voltage of 5V and maximum current consumption of less than 5mA. It is configured as an inverter logic, or totem pole output, format and provides an isolation voltage rated at 3750V rms. An internal shield ensures a minimum common mode transient immunity of 10kV/µsec, minimum.
It is designed for operation in temperatures ranging from -40°C to 105°C.
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