Tolerance analysis is a tool that helps the user to evaluate their design at different tolerance corners of parameters. Typically, a power supply will have some tolerance in the device current limit and primary magnetizing inductance. These tolerances will result in a spread of the electrical parameters. For example, tolerances in the current limit and primary magnetizing inductance will result in a spread in the switching frequency, duty cycle, KP, etc. If the user knows the exact current limit and primary magnetizing inductance, then the spreadsheet can recalculate the exact electrical parameters as a result.
Currently, ‘Tolerance Analysis’ allows the user to analyze the electrical parameters based on tolerances in the current limit and primary magnetizing inductance. The electrical parameters are recalculated assuming the minimum input voltage.