power supply | PartQuest™ Explore

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JimBach
Designer95251

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7 years 11 months

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AC-DC Power Adapter

SebthTh
Designer97331

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7 years 10 months

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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

Uwe
Designer96876

Uwe

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7 years 10 months

3

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Bridge Rectifier

KexiiGame
Designer94371

KexiiGame

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7 years 11 months

5

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Bridge Rectifier

Steini
Designer96371

Steini

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7 years 10 months

4

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AC-DC Power Adapter

Vinani
Designer96271

Vinani

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7 years 10 months

12

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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.The addition of a few components can make it possible for such a circuit to provide significantly higher power loads. See http://www.systemvision.com/design/ac-dc-power-adapter-current-boost-regulator for an example.

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Bridge Rectifier

IgorLaptev
Designer93946

IgorLaptev

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7 years 11 months

4

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Bridge Rectifier

ClaudiuKorodi
Designer92396

ClaudiuKorodi

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7 years 11 months

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AC-DC Power Adapter

OmarEnriquez
Designer91791

OmarEnriquez

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7 years 11 months

4

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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.The addition of a few components can make it possible for such a circuit to provide significantly higher power loads. See http://www.systemvision.com/design/ac-dc-power-adapter-current-boost-regulator for an example.

About text formats

Bridge Rectifier

MohammedNaseer
Designer89831

MohammedNaseer

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7 years 11 months

1

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JimBachDesigner95251

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SebthThDesigner97331

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UweDesigner96876

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KexiiGameDesigner94371

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SteiniDesigner96371

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VinaniDesigner96271

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IgorLaptevDesigner93946

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ClaudiuKorodiDesigner92396

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OmarEnriquezDesigner91791

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MohammedNaseerDesigner89831

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JimBach
Designer95251

SebthTh
Designer97331

Uwe
Designer96876

KexiiGame
Designer94371

Steini
Designer96371

Vinani
Designer96271

IgorLaptev
Designer93946

ClaudiuKorodi
Designer92396

OmarEnriquez
Designer91791

MohammedNaseer
Designer89831