Linear Vs Switch Mode Power Supply Difference.
DC power supply is available in switch mode and linear. Both are used for providing the dc power supply. Both these power supplies have their own merits and demerits. Now let’s see their advantage and disadvantage.
The switch mode power supply doesn’t use the transformer. In switch mode power supply we provide switching pulses to the high-frequency transformer for converting dc-dc voltage at the desired level. We first convert the supply line voltage into dc voltage then this voltage is converted to the desire voltage level. Due to the use of High-frequency transformer the size of the Switch mode supply is small and its weight is also lighter than the linear voltage power supply. The High-frequency transformer (ferrite core) is more efficient than the normal ac line frequency transformer.
In the linear power supply, we used a normal transformer iron core that is used for lowering or raising the voltage level. The size of the transformer is much larger then ferrite core transformer Because larger frequency requires a small size core.
In a switch mode, power supply losses are less than the linear power supply hence its efficiency is more. The switch mode power supply generate noise due to the high-frequency switching.
Linear power supply efficiency is around 50 to 60% while the switch mode power supply is 80 to 85 % efficient. The component used in linear power supply more heat due to larger semiconductor devices used.
Hence switch mode power supply is lighter, compact size and most are used in portable equipment.
While the linear power supply is well suited for sensitive analog devices due to lower noise.
DC power supply is available in switch mode and linear. Both are used for providing the dc power supply. Both these power supplies have their own merits and demerits. Now let’s see their advantage and disadvantage.
The switch mode power supply doesn’t use the transformer. In switch mode power supply we provide switching pulses to the high-frequency transformer for converting dc-dc voltage at the desired level. We first convert the supply line voltage into dc voltage then this voltage is converted to the desire voltage level. Due to the use of High-frequency transformer the size of the Switch mode supply is small and its weight is also lighter than the linear voltage power supply. The High-frequency transformer (ferrite core) is more efficient than the normal ac line frequency transformer.
In the linear power supply, we used a normal transformer iron core that is used for lowering or raising the voltage level. The size of the transformer is much larger then ferrite core transformer Because larger frequency requires a small size core.
In a switch mode, power supply losses are less than the linear power supply hence its efficiency is more. The switch mode power supply generate noise due to the high-frequency switching.
Linear power supply efficiency is around 50 to 60% while the switch mode power supply is 80 to 85 % efficient. The component used in linear power supply more heat due to larger semiconductor devices used.
Hence switch mode power supply is lighter, compact size and most are used in portable equipment.
While the linear power supply is well suited for sensitive analog devices due to lower noise.
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