This document introduces design aids for simplifying designs using the FAN5234 and FAN5236 PWM modulators, including a spreadsheet to calculate recommended component values and a continuous time behavioral model that runs in PSPICE A/D. The document also provides Bode plot outputs and phase gain Bode plot functionality.
Fairchild Semiconductor has developed design aids to simplify designs using the FAN5234 and FAN5236 PWM modulators. These tools include a spreadsheet for calculating recommended component values, which features an added Phase Gain Bode Plot, and a continuous time behavioral model compatible with PSPICE A/D.
For a stable response, at least 45° of phase margin is recommended when the gain crosses OdB.
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