Low-input current drive features buffer-free direct drive
A series of low-input current drive, rail-to-rail output, gate-drive photocouplers has been introduced by Toshiba Electronics Europe. With threshold input current of 2mA (max), half the 4mA (max) of Toshiba’s existing products, these new photocouplers allow buffer-free direct drive of low- to medium-power IGBTs and MOSFETs from microcontrollers.
The TLP5771, TLP5772 and TLP5774 have respective peak output currents of 1.0A, 2.5A and 4.0A, allowing the series to meet a wide range of user requirements. In addition, because minimum operating voltage is 10V compared to the 15V of previous devices, the new couplers contribute to higher system efficiency and lower power consumption.
All of the new devices are housed in a low-profile 2.3mm SO6L package that supports the development of thinner and smaller systems. Minimum isolation voltage rating is 5000Vrms and operating temperature is from -40 to 110˚C.
Potential applications for the new photocouplers include servo amplifiers, small motor drivers, general-purpose inverters, Photovoltaic (PV) inverters and industrial sewing machines. The TLP5771 is suitable for small-scale IGBTs up to 20A, while the TLP5772 is applicable for mid-scale IGBTs up to 80A. The TLP5774 can be used with mid-scale IGBTs up to 100A.
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