4 Nov 2022, 20:11 UTC270 viewsread 9 August 2026 Forwarded from @ethio_electronics_care
If you have seen all the photos, you will notice that almost all of the
power supplies (although the power supplies use different electronic
equipment) use common electronic components like Fuse, Bridge
Rectifier, Filter Capacitor, Power IC, Power FET, Switch mode
transformer, Optoisolator IC, Secondary output diodes, Secondary filter
capacitors and etc. Due to this configuration, if you carefully study how
power sup…
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4 Nov 2022, 20:11 UTC318 viewsread 9 August 2026 Forwarded from @ethio_electronics_care
Easy Way To Understand The 11
Circuits Functions of SMPS With The Help
Of Schematic Diagrams
There are many types of SMPS in the market and it is impossible for me
to explain all of them. The main point here is to guide you with the help
of a SMPS schematic diagram, so that once you have understood how
each circuit functions in the SMPS then there will be no problem in
repairing all types of SMPS. Many SMPS in the ma…
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4 Nov 2022, 20:11 UTC353 viewsread 9 August 2026 Forwarded from @ethio_electronics_carePhoto
EMI/RFI filter section (board location marked as “L” and “C”) - EMI
(Electromagnetic Interference), also known as RFI (Radio Frequency
Interference), is unwanted electromagnetic energy polluting the
environment. Its propagation via radiation and power conduction over
system signal and power lines can affect the operating of electrical
equipment around the source. This circuit consist of one or two coils and
usually o…
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4 Nov 2022, 20:11 UTC397 viewsread 9 August 2026 Forwarded from @ethio_electronics_carePhoto
This is the first circuit where AC supply enters the SMPS. The Varistor
R802 protects the power supply from transient voltages resulting from
lightning strikes or power surge. The fuse F801 provides protection
against circuit faults and effectively isolates the circuit from the AC
supply source. Capacitor C801 and C824 are X capacitors and help to
reduce the differential mode EMI. Resistor R801 discharges C801 and
C8…
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4 Nov 2022, 20:11 UTC502 viewsread 9 August 2026 Forwarded from @ethio_electronics_carePhoto
The bridge circuit consists of a bridge rectifier (either 4 individual diodes
or a single package rectifier) and a filter capacitor. The function of the
bridge rectifier is to convert the incoming AC voltage into DC voltage
and the filter capacitor (usually have the value of 220uf 400Volt) to
remove the ripples and this will provide a nice DC voltage source to the
primary winding of switch mode power transformer. For…
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4 Nov 2022, 20:11 UTC220 viewsread 9 August 2026 Forwarded from @ethio_electronics_care
በመጀመሪያ ደረጃ በSwitch mode power አቅርቦት[SMPS] እና መስመራዊ ሃይል አቅርቦት (LPS) መካከል ስላለው መሰረታዊ ልዩነት እናያለን።
የመብራት የመጥፋት ሁነታ ኃይል አቅርቦት (SMPS)
SMPS ምንድን ነው? ኤስኤምኤስ የመቀየሪያ ሁነታ የኃይል አቅርቦትን ያመለክታል። የ SMPS ተግባር ቮልቴጅን ከአንድ ደረጃ ወደ ሌላ መቀየር ነው.
በተለምዶ ከኤሲ አውታረመረብ ተወስዶ ወደ ቁጥጥር ይለወጣል
ለኤሌክትሮኒክስ እቃዎች ወይም መሳሪያዎች የዲሲ ቮልቴጅ (ዎች) ያስፈልጋል.
በ 80 ዎቹ መጀመሪያ ላይ በሚሰጡት ጥቅሞች ምክንያት SMPS ብዙ ተወዳጅነት አግኝተዋል
የ SMPS ጥቅሞች የሚከተሉት ናቸው
- አነስተኛ መጠን እና ቀላል ክብደት
- ከ…
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4 Nov 2022, 20:11 UTC221 viewsread 9 August 2026 Forwarded from @ethio_electronics_care
SMPS የት ጥቅም ላይ ይውላል?
ወጪን፣ መጠንን እና ክብደትን ለመቀነስ፣ monitors ፣ ቲቪዎች፣ የሞባይል ባትሪ መሙያ፣ ፒሲዎች፣ላፕቶፕ እና ካምኮርደር ሃይል ጥቅሎች፣ አታሚዎች፣ ፋክስ ማሽኖች፣ ቪሲአርዎች፣
ተንቀሳቃሽ ሲዲ ማጫወቻዎች፣ ዲቪዲ ማጫወቻዎች፣ ማይክሮኤሌክትሮኒክስ ላይ የተመሰረቱ መሳሪያዎች ,አውቶሞቲቭ፣ ኮምፒውተር፣ ኮሙኒኬሽን፣ የሸማች ኤሌክትሮኒክስ፣ እና የኢንዱስትሪ መተግበሪያዎች SMPS ይጠቀማሉ።
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4 Nov 2022, 20:11 UTC236 viewsread 9 August 2026 Forwarded from @ethio_electronics_carePhoto
በ መስመራዊ የኃይል አቅርቦት(linear power supply) ውስጥ
የ AC ቮልቴጅ ወደ መስመራዊ ትራንስፎርመር( linear transformer) primary side ከገባ በኋላ ይህ ትራንስፎርመር AC voltage ወደ ዝቅተኛ ወይም ከፍተኛ AC ቮልቴጅ ይቀይረዋ ከዛ በ diode እና capacitors አማካኝነት ወደ ንፁህ DC voltage ይቀየራል ከዛ ለሚንፈልገው የኤሌክትሮኒክስ እቃወች እንጠቀመዋለን
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4 Nov 2022, 20:11 UTC250 viewsread 9 August 2026 Forwarded from @ethio_electronics_carePhoto
መስመራዊ የኃይል አቅርቦቱ ከአንድ በላይ የዲሲ ወጪ ሊኖረው ይችላል ግን አንደ SMPS ወጪ አይበዛም። በመስመራዊ ትራንስፎርመር ዑደት ውስጥ ችግር ካለ, ችግሩን ማግኘት በጣም ቀላል ነው ማለት እችላለሁ, ምክንያቱም በጣም ቀጥተኛ ነው. ስህተቱን በፍጥነት ለማወቅ የሊነየር ትራንስፎርመር (ኤሲ ቮልቴጅ) ወይም የዲሲ outputs (ከዲዲዮው በኋላ) ላይ ለመፈተሽ በቀላሉ መለየት ይቻላል
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4 Nov 2022, 20:11 UTC175 viewsread 9 August 2026 Forwarded from @ethio_electronics_carePhoto
In Linear Power Supply
AC voltage enters to the primary side of linear transformer and then
converts the AC into a lower or higher AC voltage depending on the
secondary winding. The output AC voltage is then rectified and filtered
by a diode and capacitors to produce a clean DC voltage.
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4 Nov 2022, 20:11 UTC181 viewsread 9 August 2026 Forwarded from @ethio_electronics_carePhoto
The linear power supply could have more than one DC output. If there is
a problem in the linear transformer circuit, I can say that it is very easy to
locate the fault because it is quite direct. Simply use a multimeter to test
on the output of the linear transformer (AC voltage) or the DC output
(after the diode) to determine the fault fast.
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4 Nov 2022, 20:11 UTC187 viewsread 9 August 2026 Forwarded from @ethio_electronics_care
First of all we will see about the basic difference between Switch mode power supply[ SMPS] and linear power supply [LPS]
Introduction to Switch Mode Power
Supply (SMPS)
What is SMPS? SMPS stands for switch mode power supply. The function of SMPS is to transform the voltage from one level to another.
Typically it is taken from the AC mains and transformed into regulated
DC voltage(s) required for electronic circu…
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