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SPICE Circuit Simulations for the HCNR200 and HCNR201 Analog

2017-09-06 11:51  
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SPICE Circuit Simulations for the HCNR200 and HCNR201 Analog Optocouplers

The purpose of this application note is to showcase the ability of PSpice software to accurately predict and simulate the behavior of Avago’s HCNR200 and HCNR201 analog optocouplers using the PSpice macro models provided by Avago Technologies. SPICE (Simulation Program with Integrated Circuit Emphasis) is now considered to be an indispensible tool for analog circuit designers.

Good macro models should accurately predict circuit performance with respect to the respective analog optocoupler data sheet parameters or specifications. PSpice or SPICE (henceforth, SPICE) simulations are an integral and indispensible part of any design engineers inventory of tools for a successful design project. Circuit simulations help to get an initial design concept off the ground and eventually allow one to tweak and optimize the prototype circuit for best possible circuit performance. The greatest benefit of circuit simulations is to verify and refine a design before building actual hardware or performing bench testing. Simulations minimize the time spent in the prototype testing phase and the associated expense.

Why Simulate?
Whatever circuit simulations may be able to perform or deliver for you, one thing they definitely would not be able to do is to actually design a circuit for you. Thus, let us first enumerate what is it that allures the designer to perform circuit simulations.

The primary impetus and thrust for circuit simulations is to minimize the time it takes to predict the performance of contemplated or proposed circuit designs. Compared to actually building and evaluating equivalent circuits for prototype testing, the time it takes to evaluate such circuits using SPICE is minuscule by comparison. In addition, these circuit simulations can be run countless times at various temperatures, biasing conditions, and component values and their tolerances in a fraction of the time it would take to breadboard and evaluate on the bench.

When performing optocoupler SPICE simulations, it should be understood from the very outset that to the software does not simulate two fundamental aspects of optocouplers. Designers use optocouplers for two primary reasons: Insulation and Isolation.