The TOSHIBA mini flat coupler TLP191B is a small outline coupler, suitable for surface mount assembly. The TLP191B consists of a GaAℓAs light emitting diode, optically coupled to a series connected photo diode array with shunt resistor • which is suitable for MOS FET gate drive.
The TLP191B is a surface‑mount GaAs infrared photocoupler that integrates a light‑emitting diode with a photo‑diode array and a shunt resistor, providing isolation for MOSFET gate drivers. It is specified for a forward current of up to 50 mA and features an isolation voltage of at least 2500 Vrms.
The device operates over a temperature range of –40 °C to 80 °C (absolute maximum) and –25 °C to 85 °C for recommended conditions. Electrical characteristics such as open voltage, short current, and switching times are detailed for design guidance, and the manual includes handling and reliability recommendations.
| Open voltage (min) | 7.0 V |
|---|---|
| Short current (min) | 24.0 pA |
| Isolation voltage (min) | 2500 Vrms |
| Forward current IF (max) | 50 mA |
| Operating temperature range (abs max) | -40 °C to 80 °C |
| Weight | 0.09 g |
The recommended forward current is typically 20 mA, with a range of 20 mA to 25 mA.
The device is rated for a minimum isolation voltage of 2500 Vrms.
Recommended operating temperature is –25 °C to 85 °C, while the absolute maximum range is –40 °C to 80 °C.
The absolute maximum forward current is 50 mA.