What is buck converter?
The buck converter
is a complete circuit which do step down voltage from input DC to DC, basically
it can give fixed voltage, such as if its input is 20v or 15v and its output
has fixed at 12v, if input voltage will increase, so its output voltage will
not change, the output remain fixed at 12v, this thing makes to it special and
useful.
Where is used of buck converter?
The buck converter
typically used in computer, laptop, mobile, circuits, even Laptop and Mobile
changers, and also SMPS works by buck converter, the SMPS basically a power
supply which used in computer.
The
Buck Converter is utilized in SMPS circuits where the DC yield voltage should
be lower than the DC input voltage. The DC info can be gotten from redressed AC
or from any DC supply. It is valuable where electrical disengagement isn't
required between the exchanging circuit and the result, however where the
information is from an amended AC source, separation between the AC source and
the rectifier could be given by a mains confining transformer.
The
exchanging semiconductor between the information and result of the Buck
Converter consistently turns on and off at high recurrence. To keep a ceaseless
result, the circuit utilizes the energy put away in the inductor L, during the
on times of the exchanging semiconductor, to keep providing the heap during the
off periods. The circuit activity relies upon what is now and then additionally
called a Flywheel Circuit. This is on the grounds that the circuit acts rather
like a mechanical flywheel that, given routinely divided beats of energy
continues turning without a hitch (yielding energy) at a consistent rate.
AC or DC Input
The
buck converter is a type of DC to DC converter that can take an info
straightforwardly from a DC source, like a battery. The info could likewise be
DC gotten from the AC mains (line) as displayed in Fig. 3.1.1 through a
rectifier/repository capacitor circuit. The AC contribution to the rectifier
circuit could be AC at high voltage straightforwardly from the AC mains supply,
or then again at a lower voltage by means of a stage down transformer. Anyway
the DC applied to the Buck Converter is acquired, it is then changed over to a
high recurrence AC, utilizing an exchanging or 'chopper' semiconductor, driven
by a (typically beat width balanced) square wave. This outcomes in a high
recurrence AC wave, which can then be re-changed over to DC in a significantly
more productive way than would be conceivable in the circuits portrayed in power.
The buck converter
is a complete circuit which do step down voltage from input DC to DC, basically
it can give fixed voltage, such as if its input is 20v or 15v and its output
has fixed at 12v, if input voltage will increase, so its output voltage will
not change, the output remain fixed at 12v, this thing makes to it special and
useful.
Where is used of buck converter?
The buck converter
typically used in computer, laptop, mobile, circuits, even Laptop and Mobile
changers, and also SMPS works by buck converter, the SMPS basically a power
supply which used in computer.
The
Buck Converter is utilized in SMPS circuits where the DC yield voltage should
be lower than the DC input voltage. The DC info can be gotten from redressed AC
or from any DC supply. It is valuable where electrical disengagement isn't
required between the exchanging circuit and the result, however where the
information is from an amended AC source, separation between the AC source and
the rectifier could be given by a mains confining transformer.
The
exchanging semiconductor between the information and result of the Buck
Converter consistently turns on and off at high recurrence. To keep a ceaseless
result, the circuit utilizes the energy put away in the inductor L, during the
on times of the exchanging semiconductor, to keep providing the heap during the
off periods. The circuit activity relies upon what is now and then additionally
called a Flywheel Circuit. This is on the grounds that the circuit acts rather
like a mechanical flywheel that, given routinely divided beats of energy
continues turning without a hitch (yielding energy) at a consistent rate.
AC or DC Input
The buck converter is a type of DC to DC converter that can take an info straightforwardly from a DC source, like a battery. The info could likewise be DC gotten from the AC mains (line) as displayed in Fig. 3.1.1 through a rectifier/repository capacitor circuit. The AC contribution to the rectifier circuit could be AC at high voltage straightforwardly from the AC mains supply, or then again at a lower voltage by means of a stage down transformer. Anyway the DC applied to the Buck Converter is acquired, it is then changed over to a high recurrence AC, utilizing an exchanging or 'chopper' semiconductor, driven by a (typically beat width balanced) square wave. This outcomes in a high recurrence AC wave, which can then be re-changed over to DC in a significantly more productive way than would be conceivable in the circuits portrayed in power.
What is boost converter?
The boost converter
is the opposite of buck converter, it will do voltage step up from input
voltage, if 12v supplied to it, than it step up voltage and give high voltage,
output voltage we can adjust and fixed by own requirement.
The buck and boost
converter or circuits works same as a transformer, but where the transformer
only works by "AC current and buck or boost converter can works at both
currents such as "AC and "DC".
The buck and boost
converter mostly used in computer and laptops, because a computer/laptop has
many different electronics parts which requires different voltage level, such
as Ram, DVD room, USB port, LCD's signal, small lights, etc. Require different
voltage, and this only possible by a Buck converter circuit.
The boost converter
is the opposite of buck converter, it will do voltage step up from input
voltage, if 12v supplied to it, than it step up voltage and give high voltage,
output voltage we can adjust and fixed by own requirement.
The buck and boost
converter or circuits works same as a transformer, but where the transformer
only works by "AC current and buck or boost converter can works at both
currents such as "AC and "DC".
The buck and boost
converter mostly used in computer and laptops, because a computer/laptop has
many different electronics parts which requires different voltage level, such
as Ram, DVD room, USB port, LCD's signal, small lights, etc. Require different
voltage, and this only possible by a Buck converter circuit.
How to works a buck circuit
This buck circuits
has four main components which is Transistor, Diode, Inductor and Capacitor,
and this circuit works at switching mode.
This buck circuits has four main components which is Transistor, Diode, Inductor and Capacitor, and this circuit works at switching mode.
Which figure you saw above this is the circuit of Buck converter.
So when its switch "ON" then current will pass, and if
switch will be "OFF" then current will can not flow, this means if
this switch remain "ON" condition so voltage flows but when switch
"OFF" than voltage be "0v".
So if this switch will switching quickly then voltage can
decrease, because if this switch "ON" and "OFF" many time
so voltage will can't remain full, and voltage will decrease.
For this we used a transistor place of switch because Transistor
can switching quickly, so when voltage switching quickly by transistor then
voltage frequency will be high, for this we used a inductor and capacitor for
current filtering, because the "DC" current has zero frequency, if
inductor and capacitor not used then "DC" load will not run smoothly.
And diode used for current maintenance so that when transistor
switched "OFF" then current can easily return.
And transistor controlled by PWM circuit, because voltage will adjust by switching, means if transistor frequency will decrease or increase then voltage will be increase and decrease.
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