Dreamstime_mikhailmikhailin_80587968 and Silicon Austria Labs
car_dreamstime_mikhailmikhailin_80587968
Dreamstime_biancoblue_3186779241
dreamstime_biancoblue_3186779241
Dreamstime_thekaikoro_137795256
dreamstime_thekaikoro_137795256_promo
Dreamstime_marek-uliasz_47178180
dreamstime_marekuliasz_47178180

Basic Min/Max Analysis Sets Resistor Values for Photocoupler Circuit (.PDF Download)

June 14, 2019
Basic Min/Max Analysis Sets Resistor Values for Photocoupler Circuit (.PDF Download)

Determining the resistor values and assuring performance of the circuit associated with a photocoupler (also called an optocoupler or optoisolator) is simple in principle, but there are some points to consider when creating a robust, trouble-free design. Using an example based on the Renesas PS8902 (a high-speed, analog-output photocoupler with a GaAlAs LED on the input side, and a PIN photodiode and high-speed amplifier transistor on the output side), it’s illustrative to do the calculations for resistor selection and drive, The schematic “fragment” of the figure summarizes the analysis scenario.

Comments

To join the conversation, and become an exclusive member of Electronic Design, create an account today!