Voltage regulation - Page 1
Forum section: electronics / general

author: Unknown
author_rank: Unknown
timestamp: January 30, 2010, 04:01:26 am
content: Dave,I would love to see a blog on voltage regulation. Methods, set ups, and appropriate choice per application including if/when no regulation is required.For instance cap selection for say a 7805, when are zener diodes appropriate/not appropriate, other methods, ect.Love the blog, I look forward to each release.Thank you for your time.

author: djsb
author_rank: Super Contributor
timestamp: January 30, 2010, 05:37:44 pm
content: Hi,I've had problems before with a regulator oscillating because of (my) poor PCB layout and also incorrect decoupling. I t would be nice to have some tips on this.Also how do you design a power supply WITHOUT a regulator i.e for a high powered audio amplifier.Any thoughts.David.

author: gbowne1
author_rank: Contributor
timestamp: March 08, 2010, 05:51:32 am
content: This would be a good point to talk about good and bad PCB design. Everyone could learn a few things from a nice blog on PCB design tips. I also could benefit from one about Voltage Regulation because that's been one of my demons too. I've too often not had the right part in hand when I really needed a better Voltage Regulator.I have used the 7805 and 7809 with pretty good success.Greg

author: Simon
author_rank: Unknown
timestamp: March 08, 2010, 06:20:40 pm
content: with linear regulators like the 7805 you want input and output decoupling capacitors as close to the regulator as possible, not much mystery to it

author: Neilm
author_rank: Super Contributor
timestamp: March 11, 2010, 07:32:10 pm
content: For tips on how to layout PCBs go tohttp://www.compliance-club.com/and look for past articles by Keith Armstrong. This is mostly aimed for EMC compliance and high speed signals but the basics are there.Neil

author: DJPhil
author_rank: Frequent Contributor
timestamp: March 21, 2010, 04:40:03 pm
content: I know this thread has been dead a while, but I found a resource I thought might help if someone searches for it later on.NEC has an excellentusage manual for 3 terminal regulatorsthat I stumbled on looking for a datasheet.Here's a copy of the table of contents to help show what it covers.1. INTRODUCTION2. BASIC STRUCTURE OF A POWER SUPPLY IC2.1 Structure of a Bipolar IC2.2 About Power Supply IC Equivalent Circuits3. BASIC CIRCUITS OF A POWER SUPPLY IC3.1 Basic Circuits3.2 Operating Principles of Adjustable Output Types3.3 Operating Principles of Low Saturation Types4. POWER SUPPLY IC APPLICATION CIRCUITS4.1 Typical Circuit Connection4.2 Application Circuit Set5. PRECAUTIONS ON APPLICATION5.1 Shorting Input Pins and Ground Pins5.2 Floating Ground Pins5.3 Applying Transient Voltage to Input Pins5.4 Reverse Bias Between Output Pin and GND Pin5.5 Precautions Related to Low Saturation Types5.6 Thinking on Various Protection Circuits6. POWER SUPPLY IC DATA SHEET APPEARANCE AND DESIGN METHODS6.1 Absolute Maximum Ratings6.2 Recommended Operating Conditions6.3 Electrical Specifications6.4 Design MethodsI know it doesn't really deal with the primary issue in this thread (seems to be pcb layout and decoupling), but perhaps someone will find it useful.