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
SMPS Circuits
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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
Power Factor Correction (PFC) Circuit – Tutorial
The post details the different methods of configuring a power factor correction circuit or a PFC circuit in SMPS designs, and explains the best practice options for these topologies so that it complies with the modern PFC restriction guidelines. Designing efficient power supply circuits have never been easy, however in the course of time researchers 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