6V Switcher

A first attempt at designing a switch-mode power supply.

Niel Malan

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Description

My car doesn't have an interior light. Well, technically it doesn't have an interior. But there's no light for me to do any navigation or bookkeeping by.
I have a 6V LED lamp (salvaged from a camping lantern) that I can use as a light source, but it needs a power source.
The project is to build a power supply for the lamp, and install it in my car.

Files

MS-2208.pdf Analog Devices Technical Article MS-2208 "Selecting the Right Passive and Discrete Components for Top System Performance" Adobe Portable Document Format - 154.60 kB - 01/31/2018 at 20:17	Preview	Download

slva157.pdf Choosing Inductors and Capacitors for DC/DC Converters Useful application report from Texas Instruments. Adobe Portable Document Format - 204.84 kB - 01/23/2018 at 16:27	Preview	Download

slta055.pdf Input and Output Capacitor Selection Useful application report from Texas Instruments. Adobe Portable Document Format - 219.53 kB - 01/23/2018 at 16:18	Preview	Download

snva038b.pdf AN-1197 Selecting Inductors for Buck Converters. Useful application note from Texas Instruments. Adobe Portable Document Format - 558.87 kB - 01/23/2018 at 11:45	Preview	Download

6VSMPS_Design.xlsx Spreadsheet for design calculations of a step-down converter, using the example from the AN920-D application note as a guide. sheet - 16.67 kB - 01/14/2018 at 21:39		Download

View all 6 files

Components

1 × MC34063A Power Management ICs / Switching Regulators and Controllers

Project Logs

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Inductors
Niel Malan • 01/28/2018 at 18:13 • 1 comment

I recovered these inductors from an air-condition unit. They have a value of 1.3 mH. Is that enough or too much? My design suggests a 0.56 mH inductor.

What about current?