Design tool
TPSF12CX-MATHCAD
TPSF12C1/-Q1 and TPSF12C3/-Q1 common-mode AEF Mathcad design tool
TPSF12CX-MATHCAD
Overview
This Mathcad file is offered to predict the stability of a voltage-sense current-inject AEF circuit, in particular with respect to TI's TPSF12C1/3/-Q1 family of common-mode (CM) AEF ICs, and to assist with component selection. The model is inclusive of most parasitic effects and can be used as a quick check of the loop gain and insertion loss prior to simulation, bench measurement and fine tuning. The worksheet functions for single- and three-phase AC systems and facilitates two ways of entering the CM choke parameters:
- Using a CM choke behavioral model with
- Resistive and capacitive parasitics ā suitable for ferrite-core choke
- A ladder network of three parallel RL circuits ā suitable for nanocrystalline chokes
- Using measured impedance data (magnitude and phase)
Features
- Examine the CM choke impedance versus frequency behavior
- Select components for the compensation and damping networks
- Optimize the loop gain for stability based on the passive filter components
- Inspect filter attenuation performance with AEF enabled and disabled
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