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  Switched Mode Power Supply

STUDY OF SMPS (Switched Mode Power Supply)

To study the SMPS (switched-mode power supply) power supply.

SMPS Power Supply

Monochrome and colour TV receiver comprise several types of power supplies. SMPS (switched-mode power supply) power supply is one of it. It converts the AC input voltage to DC regulated power. SMPS (switched-mode power supply) power supply might be divided into five stages.

1. Input rectifier and filter.

2. High frequency switch.

3. Power Transformer

4. Output rectifier and filter

5. Control circuit.

1. Input rectifier and filter

This stage rectifies the AC 220 v, 50HZ to DC supply with bridge rectifier.

2. High Frequency Switch

In high Frequency Switch stage MOSFET's are used like a High Frequency switch the DC voltage is converted to square waves through using chopper principle.

3. Power Transformer

Power Transformer stage transformer is employed to step up or step down the AC Voltage.

4. Output rectifier and filter

Output rectifier and filter stage rectifies the AC voltage to needed value of DC regulated power supply.

5. Control Circuit

This stage is employed a feedback network that is connected to the output stage and high frequency switch.

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Figure: SMPS Power Supply

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