The series is suitable for controlling SiC MOSFETs and IGBTs in green energy and industrial automation applications, including industrial photovoltaic (PV) inverters, uninterruptible power supplies (UPS), and electric vehicle (EV) charging stations, operating in harsh thermal environments.

The three devices in the TLP579xH series are designed to control small- to medium-capacity power devices, as well as IGBTs. The TLP5791H has a -1.0/+1.0 A peak high-level/low-level (IOLH/IOHL) output current rating, with an extended undervoltage lockout threshold (UVLO+) of 9.5 V (max.), an undervoltage lockout threshold (VUVLO-) of 7.5 V (min.), and a UVLO hysteresis voltage (VUVLOHYS) of 0.5 V (typ.).

With the TLP5794H, the maximum output current ranges from -6.0/+4.0A for IOLH/IOHL, with a VUVLO+ of 13.5V (max.), a VUVLO- of 9.5V (min.), and a VUVLOHYS of 1.5V (typ.).

The TLP5795H is capable of -4.5/+5.3A for the high/low level output current (IOLH/IOHL), with a VUVLO+ of 13.5V (max.), a VUVLO- of 11.1V (min.), and a VUVLOHYS of 1.0V (typ.).

The propagation delay time exhibits low temperature dependence, enabling stable operation within the practical range defined by industrial automation equipment. Furthermore, the TLP579xH series is a rail-to-rail output device that allows for switching characteristics with minimal voltage drop from the supply voltage. This capability is useful in applications requiring circuits to operate at low voltages or to process signals across the entire supply voltage range.

Furthermore, Toshiba has improved the light output of the input-side infrared light-emitting diode (LED) and optimized the design of the device's light-receiving element (photodiode array) compared to the current range. These improvements increase the product's optical coupling efficiency, enabling it to operate in a temperature range from -40°C to +125°C. Toshiba has also standardized the propagation delay time and propagation delay deviation within this operating temperature range.

The TLP579xH series comes in a small SO6L package, which contributes to improved component placement flexibility on printed circuit boards. Additionally, the new products feature a minimum creepage distance of 8.0 mm and an isolation voltage of 5000 VRMS, making them suitable for use in equipment requiring high isolation performance.

For more information on the TLP579xH series of optocouplers for gate drivers, please visit the Toshiba website:
TLP5791H 
TLP5794H
TLP5795H. 
Toshiba will continue to develop and expand its range of optocouplers for MOSFET and IGBT gate control applications in industrial equipment, with new products planned for the end of 2025.

For precautions and usage advice regarding a gate-negative bias power supply, please refer to the application note "Gate Drive Coupler Notes on using power device gate negative bias power supply."