POWER SUPPLY PI FILTER DESIGN HOW TO
POWER SUPPLY PI FILTER DESIGN DRIVER
POWER SUPPLY PI FILTER DESIGN BLUETOOTH
POWER SUPPLY PI FILTER DESIGN DOWNLOAD

During a high voltage surge (more than 275VAC), the MOV became dead short and blows the input Fuse. F1 is a 1A 250VAC slow blow fuse and RV1 is a 7mm 275V MOV ( Metal Oxide Varistor). This section consists of two components, F1 and RV1. Secondary Rectifier and snubber circuit.

POWER SUPPLY PI FILTER DESIGN HOW TO

If you are new to this software you can refer to the design section of this 12V SMPS circuit to understand how to use the software.īefore going straight into building the prototype part, let’s explore the 5v 2A SMPS circuit diagram and its operation. The Circuit shown below is constructed using Power Integration’s PI expert software. It is excellent power supply design software.

POWER SUPPLY PI FILTER DESIGN DOWNLOAD

Download the PI expert software and use the version 8.6. The best way to build the 5V 2A SMPS Schematic is to use Power integration’s PI expert software. In such a segment, TNY268PN could provide 15W output. However, we will make the SMPS in the open frame and for the universal input rating. In the above image, the maximum power 15W is shown. We have previously used this IC to build a 12V SMPS circuit on a PCB. Based on the requirements and availability we have decided to use the TNY268PN from tiny switch II families.

POWER SUPPLY PI FILTER DESIGN DRIVER

Power integration is a semi-conductor company that has a wide range of power driver ICs in various power output ranges. Output short circuit, over-voltage and over-current protection.įrom the above requirements there is wide range of ICs to select from, but for this project we have selected Power integration.Let’s sum up the design considerations to select the ideal Power Management IC that will be suitable for our design.

Selection of the Power Management ICĮvery SMPS circuit requires a Power Management IC also known as switching IC or SMPS IC or Drier IC. On the Output side we will include short circuit protection, over-voltage protection, and over-current protection. Also, to deal with EMI issues, a common mode filter will be used for blanking out the generated EMI. Depending on the type, protection circuit can be connected across input or across the output.įor this SMPS, input surge protection will be used with a maximum operating input Voltage of 275VAC. The protection circuit protects the SMPS as well as the associated load. There are various protection circuits that can be employed in a SMPS for a safe and reliable operation. This problem can be avoided by using a PCB. Since this SMPS will be built in veroboard using a handmade switching transformer we can expect a slightly higher values of ripple. The targeted ripple voltage for this SMPS is less than 30mV peak-peak ripple. It is highly desired that a good power supply unit has a ripple voltage of less than 30mV pk-pk. This output voltage of 5V should be constant and steady even at the lowest input voltage during a maximum load (2A) across the output. Since this SMPS will provide constant voltage irrespective of the load current, it will work on the CV (Constant Voltage) mode. The output voltage is selected as 5V with 2A of the current rating. This way the SMPS can be used in any country irrespective of their AC mains voltage value. Thus, the AC voltage will be 85-265VAC with 50Hz rating. For the input voltage value, it is good to use a universal input rating for the SMPS. This will be an SMPS in AC to DC conversion domain. Proper specification analysis needs to be performed before going forward with the actual design. Also, SMPS works in specific input-output boundaries. Previously we have also built a 12V 15W SMPS circuit using a PCB, so people who are interested in how to design a PCB for a PSU project (power supply unit) can check that as well.ĥV 2A SMPS Circuit – Design Specificationsĭifferent varieties of power supply behave differently in different environments. The idea of the project is to keep the build as simple as possible, hence we will design the complete circuit over a dotted board (perf board) and will also build our own transformer so that anyone could replicate this design or build similar ones. Also 5V 2A SMPS circuit is quite popular in electronics since there are lots of microcontrollers which operates on 5V. This power rating should be enough to power most electronic products running on 5V. That is our circuit will convert the 220V AC mains to 5V and provide a maximum output current upto 2A. In this project we will build a similar AC to DC power supply circuit with 10W power rating.

POWER SUPPLY PI FILTER DESIGN BLUETOOTH

Most household electronic products like Mobile Chargers, Bluetooth Speakers, Power Banks, Smart Watches etc requires a Power Supply circuit that could convert the AC mains supply to 5V DC to operate them. Power Supply Unit (PSU) is a vital part in any electronic product design.

Power supply pi filter design