When compared to linear voltage regulators the switching voltage regulators are much
power efficient. In the case of linear voltage regulators the difference between the
input and output voltage is just wasted and for switching regulators there is almost no
such wastage and that’s why the switching regulators have great power efficiency ranging
up to 85% . In simple words, the switching regulator operates by taking small bits of
energy from the input voltage source and then transferring it to the output with the
help of a solid state switch and a control circuitry. Since the switching element is
either fully open or closed at any moment, no energy is wasted across it. The control
circuit controls the duty cycle of the solid state switch which in turn determines rate
at which energy is transferred to the output.
The electronic circuit given here is of a simple and low cost switching regulator using
the IC LM317 that can deliver up to 3A of current. The input voltage range of this
circuit is between 8 to 35V DC and the output voltage can be adjusted between 1.8 to 32V
DC. The output voltage can be adjusted by using the POT R
Notes.
Assemble the circuit on a good quality PCB.
C4 and C3 must be a solid tantalum capacitor.
Transistor T1 and IC1 require heat sinks.
L1 can be a 600uH inductor.
source: http://www.circuitstoday.compower efficient. In the case of linear voltage regulators the difference between the
input and output voltage is just wasted and for switching regulators there is almost no
such wastage and that’s why the switching regulators have great power efficiency ranging
up to 85% . In simple words, the switching regulator operates by taking small bits of
energy from the input voltage source and then transferring it to the output with the
help of a solid state switch and a control circuitry. Since the switching element is
either fully open or closed at any moment, no energy is wasted across it. The control
circuit controls the duty cycle of the solid state switch which in turn determines rate
at which energy is transferred to the output.
The electronic circuit given here is of a simple and low cost switching regulator using
the IC LM317 that can deliver up to 3A of current. The input voltage range of this
circuit is between 8 to 35V DC and the output voltage can be adjusted between 1.8 to 32V
DC. The output voltage can be adjusted by using the POT R
Notes.
Assemble the circuit on a good quality PCB.
C4 and C3 must be a solid tantalum capacitor.
Transistor T1 and IC1 require heat sinks.
L1 can be a 600uH inductor.
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