Low-Power Photocouplers with High CTR for Industrial Systems
Toshiba America Electronic Components, Inc. (TAEC) has introduced a new family of low input current-type transistor output photocouplers that offer a high current-transfer-ratio (CTR) at low input current. The TLP182, TLP183, TLP292, and TLP293 significantly contribute to a reduction in power consumption by reducing the LED current of the photocoupler. Available in both SO4 (TLP292 and TLP293) and 4-pin SO6 (TLP182 and TLP183) packages, by employing Toshiba's original high-output LED, these products provide not only a high current transfer ratio at the conventional input current of 5mA, but also at the same current transfer ratio at the low LED current of 0.5mA.
This makes it possible to minimize the current to the LED and therefore reduce power consumption. The TLP182, TLP183, TLP292, and TLP293 also support operation at up to an ambient temperature of 125 degrees C, making them suited for use in industrial devices such as PLCs and inverters, compact power supplies, ac line detection for household appliances, and other devices operating in extremely hot environments.
The CRTs for these devices are specified to be 50-600. All the devices are specified to operate over a temperature range of -55 to +125 degrees C and all have a breakdown voltage rating of 3,750 Vrms. The TLP182 (4-pin SO6) and TLP292 (SO4) are ac input devices and the TLP183 (4-pin SO6) and TLP293 (SO4) are dc-input devices. Key features also include: Smaller, thinner package produced in high efficiency production lines (SO6 and SO4); High CTR at low input current of 0.5mA; and Proper operation at ambient temperatures up to 125 degrees C.
