8mm clearance distance photocouplers reinforce isolation

27th October 2016

Toshiba

Alice Matthews

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Two photocouplers, TLP2767 and TLP236, have been announced by Toshiba Electronics Europe for high-speed communications at data rates up to 50Mbps. TLP2767 is the first 50Mbps product in the industry to achieve both a creepage and clearance distance of 8mm and isolation thickness of 0.4mm for reinforced isolation.

It is housed in an SO6L package and guarantees isolation voltage of 5000V_rms (min). TLP2367 is housed in a 5pin small SO6 package, guaranteeing creepage and clearance distance of 5mm (min) and isolation voltage of 3750V_rms (min.). Both packages are 2.3mm (max) low height packages and meet international safety standards including UL1577 and EN60747-5-5.

The photocouplers guarantee a propagation delay time of 20ns (max), pulse width distortion of 8ns (max) and propagation delay skew of 10ns (max). They can be used to reduce the dead time of various interfaces including inverters, which can contribute to improving the power efficiency of systems.

TLP2767 and TLP2367 utilise on the input side Toshiba's original high output infrared LEDs achieving high output power. This reduces the threshold input current by approximately 20%, compared with Toshiba’s older TLP117 product. On the output side, a photo detector IC fabricated with a CMOS process reduces the supply current by approximately 50%, compared with Toshiba’s TLP117. Both photocoupler can contribute to lowering the operation voltage of systems with guaranteed supply voltage of 2.7-5.5V, at temperatures up to 125°C. Applications include Programmable Logic Controllers (PLC), I/O interface, PhotoVoltaic (PV) inverters and FA inverters.