matrixofdynamism
Advanced Member level 2
I understand that there are multiple topologies of switched mode power supplies and the primary reasons for using them is their efficiency when compared with linear ones.
Is it true that the switched mode power supply portion merely replaces the linear regulator bit of an AC-DC converter and not the transformer? If this is the case then how come my smart phone's USB charger is so very tiny. I know transformers as being big, I can't image any fitting in a single plug.
By the way, I know that unregulator power supplies only have a smoothing capacitor after the bridge rectifier stage. They do not have a linear regulator stage. This causes the output voltage to drop the more it is loaded. Why does the voltage drop within the power supply when we load it? Is it dropped across the transformer and the diodes?
Is it true that the switched mode power supply portion merely replaces the linear regulator bit of an AC-DC converter and not the transformer? If this is the case then how come my smart phone's USB charger is so very tiny. I know transformers as being big, I can't image any fitting in a single plug.
By the way, I know that unregulator power supplies only have a smoothing capacitor after the bridge rectifier stage. They do not have a linear regulator stage. This causes the output voltage to drop the more it is loaded. Why does the voltage drop within the power supply when we load it? Is it dropped across the transformer and the diodes?
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