How to perform a simulation of a SMPS?
After you’ve selected candidate components for your SMPS, there are some simple simulations you can perform to evaluate its behavior: Transient analysis: this will help you visualize ripple on the regulator output. Parameter sweep: this is helpful for iterating through various values for passives in the circuit.
Why do I need a SMPS power supply?
The bulky power supplies used in desktop computers and precision power supplies all use an SMPS transformer for galvanic isolation at the input of the regulator.
What do you need to know about SMPS transformers?
If you’re designing a switching power supply, you’ll need to evaluate the behavior of all transformers (both for input rectification and in the power transformer section) produces the desired output voltage and that ripple is within your tolerances. What is an SMPS Transformer?
Which is a standard analysis of a SMPS circuit?
One of the standard analyses for SMPS circuits is the calculation of the response to an input change to test the capability of the SMPS design to regulate the output with step changes in the input line. This can be accomplished by adding a pulse to the input voltage and checking the output and other voltages.
Can a PWM be simulated with a SMPS transformer?
As you’re dealing with a switching regulator, you’ll want to use an SMPS component model for your PWM oscillator. In the event such a model is not available for your desired oscillator circuitry, you can simulate the PWM signal with an arbitrary piecewise linear voltage source in your circuit.
Is there a way to simulate a PWM signal?
In the event such a model is not available for your desired oscillator circuitry, you can simulate the PWM signal with an arbitrary piecewise linear voltage source in your circuit. You can then iterate through different duty cycles to check out the output is affected.
What’s the efficiency of a SMPS power supply?
A non-isolated SMPS can have efficiency above ~95%, while an isolated power supply typically has 70% to 90% efficiency. The low efficiency of an isolated SMPS arises due to the SMPS transformer used in the package. As these power supplies are run at high voltage/current, they pass strong magnetic fields into the core of the SMPS transformer.