0

Switching-Mode Power Supply design

Swline

A tutorial on switching-mode power supply design by Jerrold Foutz

As explained in the introduction, a power supply is a buffer circuit that is placed between an incompatible source and load in order to make them compatible. In this section we explore some simple dissipative circuits that can be placed between a 12 Vdc battery and a 5 Vdc load to make them compatible. The buffer circuits are simple in that we will restrict the parts to one each or less of the following parts: variable resistor, breakdown diode, switch, diode, single winding inductor, and capacitor.

For the dissipative topologies we will only use the variable resistor and the breakdown diode. The other parts will be used in the next section on switching topologies.

We will be concerned only with the power conversion part of the circuit, not the control. We will assume that the circuits are open loop and the output voltage is controlled manually by the value of a variable resistor or the duty cycle of a switch.

Although simple from a parts basis, the circuits we will explore with these parts are not necessarily simple from an analytical viewpoint. Some of the switching topologies will contain right-half-plane zeroes, an interesting topic that will be discussed later in this tutorial.


Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.

Join 14,000+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

CircuitPython 2019!

Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7:30pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Follow Adafruit on Instagram for top secret new products, behinds the scenes and more https://www.instagram.com/adafruit/


Maker Business — Facebook struggling to break into hardware

Wearables — Lacy wires

Electronics — Higher isn’t always better

Biohacking — Vitamin-C + Gelatin for Accelerated Recovery

Python for Microcontrollers — Supercharged Supercon with CircuitPython, Quoth the Raven MOAR PYTHON! #Python #Adafruit #CircuitPython #PythonHardware @circuitpython @micropython @ThePSF @Adafruit

Adafruit IoT Monthly — The S in IoT is for Security, Amazon announces Sidewalk and more!

Microsoft MakeCode — Xenomorph candy bucket and spooky workshops with MakeCode!

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !



No Comments

No comments yet.

Sorry, the comment form is closed at this time.