This product is a photocoupler composed of a gallium arsenide infrared emitting diode and a photo-MOSFET. It has a higher output current rating and a lower output resistance than phototransistor-type photocouplers, making it suitable for use as an On/Off control for high current.
The Toshiba TLP222A and TLP222A-2 are gallium‑arsenide infrared LED‑coupled photorelay devices packaged in DIP form. They provide an optically isolated switch suitable for on/off control of high‑current loads.
The datasheet lists key electrical ratings such as a peak off‑state voltage of 60 V, on‑state current up to 500 mA, isolation voltage of 2500 Vrms, and a trigger LED current up to 3 mA. Typical operating conditions include a 48 V supply voltage and operation from 20 °C to 85 °C.
| Peak off‑state voltage | 60 V (min) |
|---|---|
| On‑state current | 500 mA (max) |
| On‑state resistance | 2 Ω (max) |
| Isolation voltage | 2500 Vrms (min) |
| Trigger LED current | 3 mA (max) |
| Forward current (IF) | 5 – 25 mA (typ 7.5 mA) |
| Operating temperature range | 20 °C to 85 °C |
The device can handle up to 500 mA of on‑state current.
It provides a minimum isolation voltage of 2500 Vrms.
The trigger LED current should not exceed 3 mA.