Ultra compact photocoupler for industrial applications

Toshiba Electronics Europe has announced a compact photocoupler designed to help engineers address mosfet and gate drive requirements in inverters, induction heating designs and other applications requiring safety isolation and operation at high ambient temperatures.

Offering performance from -40 to 125ºC, the TLP2451 is supplied in an SO8 package with dimensions of 3.95 x 5 x 2.5mm. Minimum isolation is rated at 3750Vrms and the photocoupler is said to feature a totem pole buffer logic output that can deliver peak output currents of +/-0.6A. The device incorporates a GaAlAs infrared LED that is optically coupled to a high gain, high speed photodetector. An internal Faraday shield has been implemented to provide a common mode transient immunity of +/-15kV/µs. According to Toshiba, the coupler can operate with power supply voltages of 10 to 30V and has a maximum threshold input current of 5.0mA. Maximum propagation delay time is rated at 700ns.