Fast photocouplers feature low pulse width distortion

January 22, 2016 // By Graham Prophet
These thinner-package photocouplers are able to operate under high temperatures for use in industrial environments.

TLP2745 and TLP2748, from Toshiba Electronics Europe, are high speed photocouplers, offering low Pulse Width Distortion (PWD) and low power consumption for high speed, high temperature operation. They have been designed for applications such as high-speed digital interfaces for measurement or control devices, intelligent power module (IPM) drives and programmable logic controllers for use in industrial settings.

The TLP2745 is a buffer logic type (high input to high output) photocoupler, while the TLP2748 is an inverter logic type (high input to low output) coupler, both provide a minimum isolation voltage of 5kVrms. Featuring a propagation delay of 120 nsec (max) for higher operational efficiency while guaranteeing 40 nsec (max) pulse width distortion and 70 nsec (max) propagation delay skew, these ICs allow the reduction of inverter dead time, contributing to an overall improvement in power efficiency. By guaranteeing a threshold input current of 1.6 mA (max), they allow bufferless direct drive from MCUs.

With an operating temperature range of -40°C to 110°C, and a supply voltage range of 4.5 to 30V, these ICs are suited to communication interfaces (such as RS232, RS422, and RS485) including use in industrial applications, and data transmission solutions between circuits with different voltages. The TLP2745 and TLP2748 are housed in an SO6L package, measuring 10 x 3.8 x 2.1 mm and they have a minimum creepage distance of 8 mm.

Toshiba Electronics Europe;