In this post we try to diagnose a burnt SMPS circuit and try to troubleshoot and repair the circuit. The shown unit is a cheap readymade Chinese make SMPS circuit. This article is written as per the request made by Mr. Kesava. My SMPS got Burnt Dear sir, You help me lot sir…The below attachment Read More
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110V, 14V, 5V SMPS Circuit
In this post we learn how to apply the IC L6565 for making a compact multi purpose 110V, 14V, 5V SMPS circuit using minimum number of external components. Implementing quasi-resonant ZVS flyback The IC L6565 from ST Microelectronics is designed as a current-mode primary controller chip, to specifically suit quasi-resonant ZVS flyback converter applications. The quasi-resonant Read More
12V 2 Amp SMPS Circuit
In this post we comprehensively discuss a simple 12V 2 amp SMPS circuit using the IC UC2842. Let’s try to understand the functions and criticalities of a few of the main components used in this 12V 2 amp SMPS circuit: Cin Input Bulk capacitor and minimum bulk voltage: The shown bulk capacitor Cin may be Read More
7 Watt LED Driver SMPS Circuit – Transformerless, Current Controlled
The presented 7 watt LED driver circuit is an SMPS based non-isolated, transformerless circuit which ensures a safe current controlled output for the attached LED, it is very affordable to build without involving complex transformer winding. Constant Current and Load Regulation Objective The aim behind the design of the IC TPS92310 (from TEXAS INSTRUMENTS) is Read More
LM317 Variable Switch Mode Power Supply (SMPS) Circuit
So far in this website we have studied LM317 based linear power supply circuits, here we will learn how an LM317 can be executed as a variable switch mode power or SMPS with zero loss. LM317 as Linear Regulator We all know that an LM317 IC is internally designed to work as a linear voltage Read More
Make this 3.3V, 5V, 9V SMPS Circuit
Here we learn about a simple switch mode power supply (SMPS) circuit which is capable of delivering 3.3V, 5V, 9V at around 800mA from a Mains input range of 100V to 285V, with a complete isolation. The functioning of the proposed 3.3V, 5V, 9V SMPS Circuit may be understood by going through the following detailed Read More
Ferrite Core Material Selection Guide for SMPS
In this post we learn how to select ferrite core material with the correct specifications for ensuring proper compatibility with a given SMPS circuit design Why Ferrite Core Ferrite is a wonderful core substance for transformers, inverters and inductors in the frequency spectrum 20 kHz to 3 MHz, owing to the benefits of reduced core Read More
How to Make a Variable Current SMPS Driver Circuit
This article discusses a method through which any ready made SMPS can be converted into a variable current smps circuit using a few external jumper links. In one of the previous articles we learned how to make a variable voltage SMPS circuit by employing a simple shunt regulators stage, in the present hack also we Read More
Variable SMPS Driver Circuit
This post tries to determine a method through which any SMPS could be made into a variable power supply for achieving any desired voltage level from 0 to maximum. What is SMPS SMPS stands for switch mode power supply, as the name suggests this power supply concept utilizes high frequency switching pulses for converting mains Read More