5 volt 2 amp power supply circuit

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5 volt 2 amp power supply circuit

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Content:

• Adjustable 3V, 5V, 6V, 9V,12V,15V Dual Power Supply Circuit
• Basic 5 Volt Power Supply
• USB power supply charger Arteor - double USB sockets - 5 V - 3 A - 2 modules - white
• Can I Use a Charger With the Same Voltage but Different Amperage Rating?
• Many ideas of 12V and 5V Dual Power Supply Circuit Diagram at 3A max
• 5V 2 Amp Power Supply Board 220V AC to 5V DC

WATCH RELATED VIDEO: 5 volt 2 amp power supply circuit, 7805 Regulator Ic circuit,Breadboard projects, Dc to Dc Convert

Adjustable 3V, 5V, 6V, 9V,12V,15V Dual Power Supply Circuit

That is our circuit will convert the V AC mains to 5V and provide a maximum output current upto 2A. This power rating should be enough to power most electronic products running on 5V. 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.

Excited Right! So lets get started. Different varieties of power supply behave differently in different environments. Also, SMPS works in specific input-output boundaries.

Proper specification analysis needs to be performed before going forward with the actual design. Therefore, the input will be AC. For the input voltage value, it is good to use a universal input rating for the SMPS.

The output voltage is selected as 5V with 2A of the current rating. Thus, it will be 10W output. This output voltage of 5V should be constant and steady even at the lowest input voltage during a maximum load 2A across the output. It is highly desired that a good power supply unit has a ripple voltage of less than 30mV pk-pk. Since this SMPS will be built in veroboard using a handmade switching transformer we can expect a slightly higher values of ripple.

This problem can be avoided by using a PCB. There are various protection circuits that can be employed in a SMPS for a safe and reliable operation. The protection circuit protects the SMPS as well as the associated load. Depending on the type, protection circuit can be connected across input or across the output. On the Output side we will include short circuit protection , over-voltage protection , and over-current protection. Our Design requirements are. From the above requirements there is wide range of ICs to select from, but for this project we have selected Power integration.

Power integration is a semi-conductor company that has a wide range of power driver ICs in various power output ranges. In the above image, the maximum power 15W is shown. However, we will make the SMPS in the open frame and for the universal input rating.

Download the PI expert software and use the version 8. It is excellent power supply design software. 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. This section consists of two components, F1 and RV1. However, due to the slow blow feature, the fuse withstands inrush current through the SMPS.

This section is governed by the diode bridge. These four diodes inside DB make a full bridge rectifier. The diodes are 1N, but standard 1N can do the job perfectly. In this project, these four diodes are replaced with a full bridge rectifier DB Different states have different EMI rejection standard.

This section is created using C1, C2, and L1. C1 and C2 are V 18uF capacitors. It is an odd value so 22uF V is selected for this application.

The L1 is a common mode choke that takes differential EMI signal to cancel both. It is the heart of an SMPS. The switching frequency is khz. Due to this high switching frequency , smaller transformers can be used.

The switching circuit has two components, U1, and the C3. The C3 is the bypass capacitor which is needed for the working of our driver IC. Under-voltage lockout protection is done by the sense resistor R1 and R2. It is used when the SMPS goes into the auto-restart mode and sense the line voltage. Two resistors in series is a safety measure and a good practice to avoid resistor failure issues.

Thus, instead of 2M, two 1M resistors are used in the series. D1 and D2 are the clamp circuit. D1 is the TVS diode and D2 is an ultra-fast recovery diode. Therefore during the switching off-cycle, the transformer creates high voltage spikes due to the leakage inductance of the transformer. These high-frequency voltage spikes are suppressed by the diode clamp across the transformer.

The transformer is a ferromagnetic transformer and it not only converts the high voltage AC to a low voltage AC but also provide galvanic isolation. EMI filtering is done by the C4 capacitor. It increases the immunity of the circuit to reduce the high EMI interference. It is a Y-Class capacitor with a voltage rating of 2kV. The output from the transformer is rectified and converted to DC using D6, a Schottky rectifier diode.

The snubber circuit across the D6 provides suppression of the voltage transient during switching operations. The snubber circuit consist one resistor and one capacitor, R3, and C5. The filter section consists of a filter capacitor C6. It is a Low ESR capacitor for better ripple rejection. Also, an LC filter using L2 and C7 provide better ripple rejection across the output. After sensing the line, U2, the optocoupler is controlled and galvanically isolating the secondary feedback sensing portion with the primary side controller.

The Optocoupler has a transistor and a LED inside of it. By controlling the LED, the transistor is controlled. Since the communication is done by optically, it has no direct electrical connection, therefore satisfying the galvanic isolation on the feedback circuit too.

Now, as the LED directly controls the transistor, by providing sufficient bias across the Optocoupler LED, one can control the Optocoupler transistor , more specifically driver circuit.

This control system is employed by the TL A shunt regulator. As the shunt regulator has a resistor divider across it reference pin, it can control the Optocoupler led which is connected across it. The feedback pin has a reference voltage of 2. Therefore, the TL can be active only if the voltage across the divider is sufficient. In our case, the voltage divider is set to a value of 5V. Therefore, when the output reaches 5V the TL gets 2. If the voltage is not sufficient across the output the switching cycle is immediately suspended.

If everything is alright, it will continue the switching, if not, it will try once again after sometime. This loop gets continued until everything gets normal, thus preventing short circuit or overvoltage issues. This is why it is called flyback topology , as the output voltage is flown back to the driver for sensing related operations.

Also, the trying loop is called a hiccup mode of operation on the failure condition. The D3 is a Schottky barrier diode. This diode converts the high frequency AC output to a DC. R4 and R5 is selected and calculated by the PI Expert. The reference voltage is 2. By selecting the value of R6 Normally for an SMPS circuit a switching transformer will be required, these transformers can procured from transformer manufacturers based on your design requirements.

But the problem here is if you learning stuff of building a prototype you cannot find the exact transformer off the shelves for your design. So we will learn how to build a switching transformer based on the design requirements given by our PI expert software. As the above image states we need to perform Turns of single 32 AWG wire on the primary side and 5 turns of two 25 AWG wire on the secondary side.

In the above image, starting point of the windings and the direction of the winding is described as a mechanical diagram.

To make this transformer, the following things are needed-. The bobbin is a generic one with 4 primary and 5 secondary pins. However, here bobbin with 5 pins on both sides is used. For the Barrier tape, standard duct tape is used which has a base thickness of more than 1 mil Typically 2 mil.

During the tapping related activities, scissor is used to cut the tape for perfect widths. Copper wires are procured from old transformers and it can be purchased from local shops as well. The core and bobbin that I am using is shown below. Step 1: Add solder in the 1st and 5th pin on the primary side. Solder the 32 AWG wire at pin 5 and the winding direction is clockwise. Continue till the turns as shown below.

Basic 5 Volt Power Supply

This is a simple approach to obtain a 12V and 5V DC power supply using a single circuit. The AC mains voltage will be stepped down by the transformer T1, rectified by bridge B1 and filtered by capacitor C1 to obtain a steady DC level. In this way both 12V and 5V DC are obtained. Such a circuit is very useful in cases when we need two DC voltages for the operation of a circuit. By varying the type number of the IC1 and IC2, various combinations of output voltages can be obtained. If is used for IC2, we will get 6V instead of 5V. Same way if is used for IC1 we get 9V instead of 12V.

USB power supply charger Arteor - double USB sockets - 5 V - 3 A - 2 modules - white

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Can I Use a Charger With the Same Voltage but Different Amperage Rating?

Circuits 4. Before getting to 12v to 5v converter circuit using different methods lets a glance at the need of 5 volt supply. We already discussed 9v to 5v converter circuit previously. These circuits are basic voltage regulators, the first one is simple voltage divider using resistors.

Many ideas of 12V and 5V Dual Power Supply Circuit Diagram at 3A max

Last Updated: October 8, Approved. To create this article, 12 people, some anonymous, worked to edit and improve it over time. This article has been viewed , times. Learn more For the electronics enthusiast, having a 5 volt DC power supply around in your workspace can be very useful.

5V 2 Amp Power Supply Board 220V AC to 5V DC

Power supplies are amongst the most popular pieces of electronic test equipment. This isn't surprising, as controlled electrical energy is used in a tremendous number of ways. In this guide, we'll look at a variety of different types of power supplies, their controls, how they operate, and some examples of their application. A power supply could broadly be defined to be anything that supplies power, such as a hydroelectric dam, an internal combustion engine, or a hydraulic pump. However, we'll limit our discussion to the types of electrical power supplies that are predominantly used for test and measurement, maintenance, and product development activities. This document is intended for users or potential users of power supplies. Its aim is to define the terms used, introduce the different types of power supplies and the technology behind them, explain the controls of typical power supplies, and survey some examples of their use. Here's a table of some of the different types of power supplies.

The post describes a simple but extremely versatile amp, variable voltage power supply circuit using just a few BJTs in parallel and in a common collector mode. The idea was requested by Mr. Technical Specifications Hello Swagatam, I was wondering if you could possibly assist me.

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JavaScript seems to be disabled in your browser. For the best experience on our site, be sure to turn on Javascript in your browser. A Plus account is required to perform this action. Get valuable resources straight to your inbox - sent out once per month. A power supply is an electrical device that converts the electric current that comes in from a power source, such as the power mains, to the voltage and current values necessary for powering a load, such as a motor or electronic device. The objective of a power supply is to power the load with the proper voltage and current.

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