Optocouplers address isolation & interface requirements

9th June 2017

Toshiba

Barney Scott

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Toshiba has introduced a range of 10 AEC Q101-qualified photocouplers designed to address the demanding isolation, interface, switching and form factor requirements of automotive applications. Supplied in low-profile SO6 packages, the TLX9304, TLX9378 and TLX9376 are IC output photocouplers offering respective data rates of 1Mbps, 10Mbps and 20Mbps. Also in S06 packaging are the TLX9300 and TLX9185A transistor output and TLX9905 and TLX9906 photovoltaic output devices.

TheTLX9000 and TLX9291A also offer transistor outputs but are supplied in half-pitch SO4 packages. An SO6-packaged photorelay – the TLX9175J – is also available.

Toshiba’s photocouplers offer solutions that can operate at temperatures from -40ºC to 125ºC (except TLX9175J: Topr -55 ~ 105 ℃) and suit inverter control and intelligent power module (IPM) interface applications in conventional, EV (electric vehicle) and HEV (hybrid electric vehicle) applications. The photorelay is ideally suited to the needs of automotive battery control. Despite their small size, all of the devices have creepage/clearance distances of 5mm and offer a minimum isolation voltage of 3750Vrms.

The TLX9304, TLX9378 and TLX9376 integrate a GaAlAs infrared light emitting diode and high-gain, high-speed photodetectors. An internal Faraday shield provides a common-mode transient immunity of 15kV/μs. In the case of the TLX9175J photorelay, the LED technology is based on a gallium arsenide construction. A high-voltage MOSFET between the relay’s output terminals meets the needs of battery control systems.