Voltage Regulators, DC-to-DC Converters, Linear & Switching Power Supplies
LM340/78XX Series Linear Regulators
Understanding How Voltage Regulators Work
Here's a link on What is a DC-to-DC Converter?
RBBA-3000 Series 3 kW buck-boost converter has 98% efficiency.
RBBA-3000 and it's Datasheet. Here's the pdf of the datasheet:
Here's a quick note about the differences between classical linear power supplies and switched mode power supplies (SMPS) aka switching power supplies. Difference between linear & switching power supplies. Note the use of the term "pulse width modulation". It is a concept used in many aspects of power control.
Thermal Management of Components:
Understanding Semiconductor Thermal Resistance Data Here's the pdf of this link:
Here's a tutorial from Analog Devices on Thermal Design Basics. This applies mostly to ICs, but the thermal concepts are similar for all electronic devices.
This link presents How to Select a Heat Sink. The thermal analysis for proper heat sink selection is rather complex and usually reserved for engineering-level analysis. Therefore, we won't really attempt to work through the process. However, by looking at the various charts & graphs, you should be able to get a sense for some of the considerations designers must use when specifying a system to remove heat, including convection, ducting, heatsink, thermal compounds and liquid cooling systems. For a technician, the moral of the story is that any heat dissipating equipment removed as part of a service must be replaced. Thermal compounds should be re-applied with fresh compound of the proper type.
1N4000 Series Rectifier Diodes from Vishay Semiconductor.
Using some typical 1N400X values, if there is 0.75 volts across a forward biased 1N400X diode with an average current of 1.0 Amps, the diode will be dissipating 0.75 Watts. Using the 50 ohms thermal resistance from Junction to Ambient, gives (50 *C/W) x (0.75W) = 37.5 *C temperature difference. That means if the ambient temperature is 25 *C, the junction temperature will be about 62.5 *C (25 *C + 37.5 *C). (In *F, ambient is about 77 *F and the junction temp would be about 144.5 *F) From the spec sheet, the maximum junction temperature is spec'd at 150*C, so this device should be able to handle this current continuously. These are all approximate calculations, but it does give a technician a rough idea as to whether or not the device will be subjected to excessive junction temps. (As a note, the 25 *C/W thermal resistance with the JL subscript is a figure to be used as a "best case" for heat removal. This assumes that a heatsink is properly applied and any additional cooling needed is also proper. It's an "ideal" spec, not the typical. That is why the 50 *C/W number was used in our calculations.)
1n47xx Series Zener Diodes from Vishay Semiconductor.
Another example: Look up a 1N4739 to find it's zener voltage rating (9.1). How much power will this device dissipate with 100 mA through it at it's zener voltage? (910 mW). From the data sheet, how much above ambient temperature will the junction be with 100 mA flowing through the diode? (100.1 *C). If the ambient temperature is 40 *C, what is the approximate junction temp with this current? (140.1*C) Can this zener diode survive with this current flowing through it at 40 *C ambient temp? (Most likely it should, max. junction temp is spec'd at 175 *C, and it should remain below that. But it IS getting close. Note that the Maximum power rating for this series is 1300 mW, so it is operating below that maximum as well.) (NOTE: The Kelvin and Celsius scales have the same slope, just different y-intercepts. Therefore the 110 *K/W thermal spec is equivalent to 110 *C/W.)
2N3904 NPN Transistor Data Sheet We'll look at a variety of specs, but one graph to note is Fig. 15, which shows how the (normalized) DC Current gain varies with temperature.
Lastly, a comparison of a bipolar transistor amplifier and an op-amp amplifier in terms of power supply regulation. The op-amp offers much better regulation. The bipolar transistor will reflect power supply changes in it's gain/output voltage.
"New" Technologies in Semiconductor Devices:
Difference Between GaN and SiC Transistors:
Week #15: (12/9-13) Voltage Regulators & Power Converters, Practical Considerations, Course Wrap-Up
-
- Posts: 2383
- Joined: Fri Sep 04, 2015 6:59 pm
Jump to
- Electronics Systems - General Information
- ↳ Instructor Information
- ↳ Career Related Links and Information
- ↳ Career Information (General)
- ↳ Interviewing Skills
- 2024 Spring
- ↳ EET-250 Control Systems
- ↳ EET-250 Lecture
- ↳ EET-250 Lab
- ↳ EET-255 Advanced Topics in E.E.T./Automation
- ↳ EET-260 Microprocessor Applications
- ↳ EET-260 Lecture
- ↳ EET-260 Lab
- ↳ EET-265 Advanced Automation
- ↳ EET-265 Lecture
- ↳ EET-265 Lab
- ↳ Information for All Students
- ↳ Progress Reports for Sorting Group
- ↳ Progress Reports for Vending Group
- ↳ Progress Reports for HVAC Group
- Previous Semesters
- ↳ 2023 Fall
- ↳ EET-101 PCs, Programming & Robots
- ↳ EET-101 Lecture
- ↳ EET-101 Lab
- ↳ EET-120 Fluid Power Technology
- ↳ EET-200 Solid State Electronics
- ↳ EET-200 Lecture
- ↳ EET-200 Lab
- ↳ EET-210 Digital and Linear Circuits
- ↳ EET-210 Lecture
- ↳ EET-210 Lab
- ↳ 2023 Spring
- ↳ EET-250 Control Systems
- ↳ EET-250 Lecture
- ↳ EET-250 Lab
- ↳ EET-255 Advanced Topics in E.E.T./Automation
- ↳ EET-260 Microprocessor Applications
- ↳ EET-260 Lecture
- ↳ EET-260 Lab
- ↳ EET-265 Advanced Automation
- ↳ EET-265 Lecture
- ↳ EET-265 Lab
- ↳ Progress Reports for Golfball Group
- ↳ Progress Reports for Car Assembly
- ↳ Lab Information for All Students
- ↳ 2022 Fall
- ↳ EET-101 PCs, Programming & Robots
- ↳ EET-101 Lecture
- ↳ EET-101 Lab
- ↳ EET-120 Fluid Power Technology
- ↳ EET-200 Solid State Electonics
- ↳ EET-200 Lecture
- ↳ EET-200 Lab
- ↳ EET-210 Digital and Linear Circuits
- ↳ EET-210 Lecture
- ↳ EET-210 Lab
- ↳ EET-235L-D03 PLCs 2 Lab
- ↳ 2022 Spring
- ↳ EET-250 Control Systems
- ↳ EET-250 Lecture
- ↳ EET-250 Lab
- ↳ EET-255 Advanced Topics in E.E.T./Automation
- ↳ EET-260 Microprocessor Applications
- ↳ EET-260 Lecture
- ↳ EET-260 Lab
- ↳ EET-265 Advanced Automation
- ↳ EET-265 Lecture
- ↳ EET-265 Lab
- ↳ Lab Information for All Students
- ↳ Automated Greenhouse - Weekly Progress Reports (Individual)
- ↳ 2021 Fall
- ↳ EET-101 PCs, Programming & Robots
- ↳ EET-101 Lecture
- ↳ EET-101 Lab
- ↳ EET-120 Fluid Power Technology
- ↳ EET-200 Solid State Electronics
- ↳ EET-200 Lecture
- ↳ EET-200 Lab
- ↳ EET-210 Digital and Linear Circuits
- ↳ EET-210 Lecture
- ↳ EET-210 Lab
- ↳ 2021 Spring
- ↳ EET-120 Fluid Power
- ↳ EET-250 Control Systems
- ↳ EET-250 Lecture
- ↳ EET-250 Lab
- ↳ EET-255 Advanced Topics in E.E.T./Automation
- ↳ EET-260 Microprocessor Applications
- ↳ EET-260 Lecture
- ↳ EET-260 Lab
- ↳ EET-265 Advanced Automation
- ↳ EET-265 Lecture
- ↳ EET-265 Lab
- ↳ End of Semester Project Requirements
- ↳ Allen Bradley Information
- ↳ Conveyor Information
- ↳ Dobot Information
- ↳ EP-250 Pneumatic Trainer Info
- ↳ Fanuc Information
- ↳ Keyence SZ-01S Laser Safety Scanner
- ↳ Misc. Knowledge Base
- ↳ Misc. Lab Equipment Documentation
- ↳ Really Old Forums
- ↳ 2020 Fall
- ↳ Linux - General help
- ↳ EET-101 PCs, Programming & Robots
- ↳ EET-101 Lecture
- ↳ EET-101 Lab
- ↳ EET-120 Fluid Power
- ↳ EET-200 Solid State Electonics
- ↳ EET-200 Lecture
- ↳ EET-200 Lab
- ↳ EET-210 Digital and Linear Circuits
- ↳ EET-210 Lecture
- ↳ EET-210 Lab
- ↳ ELE-111L Internet of Things Lab
- ↳ Basic Subnetting
- ↳ 2020 Spring
- ↳ EET-120 Fluid Power
- ↳ EET-240 Robotics & Automation
- ↳ EET-250 Control Systems
- ↳ EET-250 Lecture
- ↳ EET-250 Lab
- ↳ EET-255 Advanced Topics in E.E.T./Automation
- ↳ EET-260 Micro-Processor Applications
- ↳ EET-260 Lecture
- ↳ EET-260 Lab
- ↳ EET-265 Advanced Automation
- ↳ EET-265 Lecture
- ↳ EET-265 Lab
- ↳ Lab Information for All Groups
- ↳ Weekly Progress Reports - Carwash Project
- ↳ Weekly Progress Reports - Filling Project
- ↳ 2019 Fall
- ↳ CSE-110 Information, Reading and Video List
- ↳ CSE-110 - General Information
- ↳ EET-101 PCs, Robots & Programming
- ↳ EET-101 Lecture
- ↳ EET-101 Lab
- ↳ EET-104/5/6 Safety, Diagrams, Troubleshooting
- ↳ EET-104 Safety & Health in Industry (Mondays)
- ↳ EET-105 Technical Diagrams for Automation (Wednesdays)
- ↳ EET-106 Troubleshooting (Fridays)
- ↳ EET-120 Fluid Power
- ↳ EET-200 Solid State Electronics
- ↳ EET-200 Lecture
- ↳ EET-200 Lab
- ↳ EET-210 Digital & Linear Circuits
- ↳ EET-210 Lecture
- ↳ EET-210 Lab
- ↳ EET-250 Control Systems
- ↳ EET-250 Lecture
- ↳ EET-250 Lab
- ↳ EET-260 Micro-Processor Applications
- ↳ EET-260 Lecture
- ↳ EET-260 Lab
- ↳ 2019 Spring
- ↳ EET-101 PC's, Programming & Robots
- ↳ EET-101 Lecture
- ↳ EET-101 Lab
- ↳ EET-120 Fluid Power
- ↳ Fluid Power (Public)
- ↳ EET-210 Digital and Linear Circuits
- ↳ EET-210 Lecture
- ↳ EET-210 Lab
- ↳ EET-235 PLCs 2
- ↳ EET-235 Lecture
- ↳ EET-235 Lab
- ↳ EET-250 Control System Theory
- ↳ EET-250 Lecture
- ↳ EET-250 Lab
- ↳ EET-255 Advanced Topics in E.E.T./Automation
- ↳ EET-260 Microprocessor Applications
- ↳ EET-260 Lecture
- ↳ EET-260 Lab
- ↳ EET-265 Advanced Automation
- ↳ EET-265L Lab - Day
- ↳ Weekly Progress Reports - Cold Beverage Dispenser
- ↳ Weekly Progress Reports - Warehouse Storage/Retrieval
- ↳ EET-265L Lab - Evening
- ↳ ELE-111 Internet of Things
- ↳ ELE-111 General Information
- ↳ ELE-111 Reading List
- ↳ ELE-115L - Bigos
- ↳ General
- ↳ Mech-Elec WFD Training
- ↳ Mech-Elec (Public)
- ↳ Mech-Elec WFD Training -Cohort 2
- ↳ 2018 Fall
- ↳ CSE-110 Intro to Comp (A+)
- ↳ CSE-110 General Information
- ↳ EET-101 PC's, Programming & Robots
- ↳ EET-101 Lecture
- ↳ EET-101 Lab
- ↳ EET-104/105/106 Safety & Health, Tech Diagrams, Troubleshooting
- ↳ EET-104 Safety & Health in Industry
- ↳ EET-105 Technical Diagrams for Automation
- ↳ EET-105 Public
- ↳ EET-106 Developing Troubleshooting Skills
- ↳ EET-200 Solid State Electronics
- ↳ EET-200 Lecture
- ↳ EET-200 Lab
- ↳ EET-210 Digital and Linear Circuits
- ↳ EET-210 Lecture
- ↳ EET-210 Lab
- ↳ 2018 Spring
- ↳ CSE-110L-Intro To Comp
- ↳ CSE-110L General
- ↳ CSE-220 Security Reading List
- ↳ EET-120 Fluid Power Technology
- ↳ EET-120 Fluid Power (Public)
- ↳ EET-250 Control System Theory
- ↳ EET-250 Lecture
- ↳ EET-250 Lab
- ↳ EET-255 Advanced Topics in EET/Automation
- ↳ EET-260 Microprocessor Applications
- ↳ EET-260 Lecture
- ↳ EET-260 Lab
- ↳ EET-265 Advanced Automation
- ↳ EET-265 Lecture
- ↳ EET-265 Lab
- ↳ Weekly Progress Reports - Post Weekly Progress Reports here.
- ↳ 2017 Fall
- ↳ CSE-110 Intro To Computers (A+)
- ↳ CSE-110 Information
- ↳ EET-101 PCs, Programming & Robots
- ↳ EET-101 Lecture
- ↳ EET-101 Lab
- ↳ EET-104/105/106 Safety/Tech. Diagrams/Troubleshooting
- ↳ EET-104 Safety & Health in Industry
- ↳ EET-105 Technical Diagrams for Automation
- ↳ EET-106 Developing Troubleshooting Skills
- ↳ EET-200 Solid State Electronics
- ↳ EET-200 Lecture
- ↳ EET-200 Lab
- ↳ EET-210 Digital and Linear Circuits
- ↳ EET-210 Lecture
- ↳ EET-210 Lab
- ↳ EET-260 Microprocessor Applications
- ↳ EET-260 Lecture
- ↳ EET-260 Lab
- ↳ 2017 Spring
- ↳ General Resouces
- ↳ CSE-110 Intro to Comp
- ↳ CSE-110 Reading List & General Information (Public)
- ↳ CSE-160 Intro To Programming (Python)
- ↳ CSE-240 Resources
- ↳ EET-120 Fluid Power
- ↳ EET-250 Control System Theory
- ↳ EET-250 Lecture
- ↳ EET-250 Lab
- ↳ EET-255 Advanced Topics in E.E.T.
- ↳ EET-255 Lecture (Public)
- ↳ EET-260 Microprocessor Applications
- ↳ EET-260 Lecture
- ↳ EET-260 Lab
- ↳ EET-265 Advanced Automation
- ↳ EET-265 Lecture
- ↳ EET-265 Lab
- ↳ Allen-Bradley Micro820 PLC Info
- ↳ Trail Mix Vending Machine - Evening
- ↳ Progress Reports
- ↳ Support Information
- ↳ Team Fluid Processing - Day
- ↳ Progress Reports
- ↳ Support Information
- ↳ Team Warehouse Stocking/Retrieval - Day
- ↳ Progress Reports
- ↳ Support Information
- ↳ ELE-111 Internet of Things (IOE)
- ↳ General Information
- ↳ 2016 Fall
- ↳ CSE-140 Operating Systems 1
- ↳ General Information
- ↳ CSE-110 Intro To Computer Systems
- ↳ General Information
- ↳ CSE-150 Linux Command Line and Shell Programming
- ↳ General Information
- ↳ CSE-160 Intro To Programming Using Python
- ↳ General Information
- ↳ CSE-220 Computer and Network Security
- ↳ General Information
- ↳ CSO-205 Cisco Scaling Networks
- ↳ EET-101 PCs, Programming & Robots
- ↳ EET-101 Lecture
- ↳ EET-101 Lab
- ↳ EET-104/105/106 Safety, Tech. Diagrams & Troubleshooting
- ↳ EET-104 Safety & Health in Industry
- ↳ EET-105 Reading Technical Diagrams
- ↳ EET-106 Developing Troubleshooting Skills
- ↳ EET-200 Solid State Electronics
- ↳ EET-200 Lecture
- ↳ EET-200 Lab
- ↳ EET-210 Digital and Linear Circuits
- ↳ EET-210 Lecture
- ↳ EET-210 Lab
- ↳ EET-250 Control System Theory
- ↳ EET-250 Lecture
- ↳ EET-250 Lab
- ↳ EET-260 Microprocessor Applications
- ↳ EET-260 Lecture
- ↳ EET-260 Lab
- ↳ ELE-110 Electronics For Techs 1
- ↳ General Information
- ↳ ELE-120 Printed Circuit Design
- ↳ General Information
- ↳ ELE-130 Intro To Project Management
- ↳ General Information
- ↳ ELE-210 Circuit Theory
- ↳ General Information
- ↳ ELE-250 Research and Development
- ↳ General Information
- ↳ 2016 Spring
- ↳ CSE-110 Intro To Computer Systems
- ↳ CSE-110 General Information
- ↳ Linux and Programming
- ↳ CSE-150 Linux and Shell Programming
- ↳ CSE-150 General information
- ↳ CSE-160 Introduction to Programming with Python
- ↳ CSE-160 General
- ↳ CSE-220 Computer and Network Security
- ↳ CSE-220 General Information
- ↳ CSE-240 Operating Systems 2 (Windows 2012 Server)
- ↳ CSE-240 General Information
- ↳ CSE-260 Application Servers
- ↳ CSE-260 General
- ↳ ELE-111 Internet of Everything (IOE)
- ↳ ELE-111 General
- ↳ ELE-115 Electronics for Techs 2
- ↳ ELE-115 General Information
- ↳ ELE-265 Senior Projects
- ↳ EET-120 Fluid Power Technology
- ↳ EET-130 Fundamentals of Motor Controls
- ↳ EET-135 PLCs 1
- ↳ EET-140 Fundamentals of Robotics
- ↳ EET-250 Control System Theory
- ↳ EET-250 Lecture
- ↳ EET-250 Lab
- ↳ EET-255 Advanced Topics in E.E.T.
- ↳ EET-260 Microprocessor Applications
- ↳ EET-260 Lecture
- ↳ EET-260 Lab
- ↳ EET-265 Advanced Automation
- ↳ EET-265 Lecture
- ↳ EET-265 Lab
- ↳ 2015 Fall
- ↳ 2015 Fall
- ↳ CSE-110 Intro to Computer Systems
- ↳ CSE-110 General
- ↳ CSE-140 Operating Systems 1
- ↳ CSE-140 General
- ↳ CSE-150 Linux Command and Shell Programming
- ↳ CSE-150 General
- ↳ CSE-155 Intro to Programming
- ↳ CSE-155 General Information
- ↳ CSE-220 Computer and Network Security
- ↳ CSE-220 General
- ↳ CSO-105 Cisco Networking
- ↳ CSO-105 General
- ↳ CSO-205 Cisco 3 Reading List
- ↳ ELE-111 Internet of Everything
- ↳ ELE-111 General
- ↳ ELE-111 Reading List
- ↳ ELE-121/2/3 Documentation
- ↳ ELE-121/2/3 General
- ↳ ELE-130 Intro to Project Management
- ↳ ELE-130 - General
- ↳ ELE-210 Circuit Theory
- ↳ ELE-210 General
- ↳ ELE-210 Lab (Private)
- ↳ EET-101 PCs, Programming & Robots
- ↳ EET-101 Lecture
- ↳ EET-101 Lab
- ↳ EET-104 Safety & Health in Industry
- ↳ EET-105 Technical Diagrams for Automation
- ↳ EET-106 Developing Troubleshooting Skills
- ↳ EET-120 Fluid Power Technology
- ↳ EET-135 PLCs 1
- ↳ Lecture
- ↳ Lab
- ↳ EET-140 Fundamentals of Robotics
- ↳ Lecture
- ↳ Lab
- ↳ EET-200 Solid State Circuits
- ↳ Lecture
- ↳ Lab
- ↳ EET-210 Digital & Linear Circuits
- ↳ Lecture
- ↳ Lab
- ↳ EET-240 Robotics/Automated Systems
- ↳ Lecture
- ↳ Lab
- ↳ EET-265 Advanced Automation
- ↳ Lecture
- ↳ Lab/Project
- ↳ E-Makers's Club
- ↳ E-Makers General information
- ↳ Meeting schedule and locations.