AC-DC Converter

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SergeLeef
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AN954 -Transformerless Power Supply: Capacitive

HyperactiveTurtle
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Bridge Rectifier

MaxSchafroth
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Bridge Rectifier

ChristophSchunk
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Bridge Rectifier

ChristophSchunk
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LuisGonzalez
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AC-DC Power Adapter fixed

ShabaniSarkar
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Bridge Rectifier

HebaAlobaidan
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AC-DC Power Adapter

BirdDog
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Description

This is a circuit design for a typical wall-plug power adapter. The sinusoidal source represents a typical US 60 Hz, 120V AC wall supply. A transformer steps the voltage down to a manageable range to be rectified for a 5V DC supply, but the waveform is still sinusoidal. The 4 diode bridge rectifier takes this lower amplitude sinusoidal signal and produces a DC biased result, but still with noise resulting from the rectification process.The capacitor before the voltage regulator chip helps smooth some of this noise. Then the regulator chip provides a self-contained, feedback controlled mechanism to keep the output voltage at the specified value. The output capacitor further smooths any output ripple and provides a reservoir of charge to supply any surge in current load that may be encountered.This example includes a load resistor that allows the exploration of the effects of load. The load is varied during the simulation and it can be seen that above a load of 100 mA, the regulation of the output voltage begins to deteriorate.

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Bridge Rectifier

RoyLogie
Designer55211

RoyLogie

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SergeLeef
Designer68

HyperactiveTurtle
Designer58131

MaxSchafroth
Designer57286

ChristophSchunk
Designer57061

ChristophSchunk
Designer57061

LuisGonzalez
Designer56516

ShabaniSarkar
Designer56456

HebaAlobaidan
Designer56221

BirdDog
Designer54931

RoyLogie
Designer55211