Spannung im Web

Interessanterweise werden wir immer wieder gefragt, ob wir denn nun auch Netzteile bauen.
Eigentlich eine Sache der Definition, denn ein Webservice ist durchaus auch ein Netzteil, aber so richtige Netzteile, die Strom umwandeln bauen wir eher selten.
Hier gibt es hier ein paar Tips, zum Bau von Netzteilen.

• Hersteller Links
• www.qtec.info - PC Netzteile und Modding Zubehör von Trust

• Generelle Infos
  
  • Glossary of Power Conversion Terminology
  • Inside a Power-Cube Transformer - what's inside those small transformers you have all around in your house plugged to the power outlets and powering small electronic equipments with low voltage
    
    
• Lineare Spannungsregler
  
  • A Designer's Guide to the L200 Voltage Regulator - STMicroelectronics Application Note in pdf format
  • Basic Power Supply Application Guide - application note
  • Change improves regulators reliability - standard circuit for adjustable, 3-terminal regulators (LM317, LM350, etc) suffers from a designed-in fault: If the potentiometer R2s wiper loses contact, the regulators output goes high
  • DMOS delivers dramatic performance gains to LDO regulators - LDO regulators with pnp pass elements nearly obsoleted the early npn linear regulators
  • Increasing Regulator Current - you can boost the available current output of 78xx series of voltage regulators with this circuit
  • Keep linear regulators in their safe zone - thermal characteristics of regulators depend on their operating conditions and the system's load
  • Method of Determining Secondary Current Ratings in D.C. Circuits
  • Power supplies - theory
  • Tube Power Supply
  • Unregulated Power Supply - sample circuits and some information which describes it's operation and calculation of component values
  • Unregulated power supply design
  • Voltage regulators (stabilizers) 78xx a 79xx by ST - warning about some possible problem if the regulator load is too low
    
    
• Ungeregelte Spannungsversorgung
  • 12V DC Power Supply - uses 12V 5A transformer
  • 12v Power Supply - outputs 12V 5A, includes LED to indicate that it is turned on
  • 24 volt Power Source
  • Simple power supply - simple unregualted power supply circuit and information how to add regulator to it
  • Unregulated Power Supply - basic operation described, useful general circuit for many different voltages
    
    
• Stabilisierte Spannungsversorgung
  • 12 Volt 30 Amp Power Supply - uses a single 7812 IC voltage regulator and multiple outboard pass transistors, this power supply can deliver output load currents of up to 30 amps
  • 12 volt Power Supply - regulated power supply with 2A current capacity
  • 12V RMS to 10V Voltage Regulator
  • 12 Volt to 9 Volt DC Converter
  • 78xx regulator board - circuit board and ccircuit for making voltage regulators based on 78xx ICs, in pdf format, text in Finnish
  • Active preloading provides sinking capability - a simple add-on circuit enables a unipolar power supply, usually a current-sourcing circuit only, to sink current from a load
  • Circuit reduces VCC ripple in audio band - regulator circuit which reduces noise and ripple by at least 35 dB over the audio range of 100 Hz to 20 kHz and provides a clean source of 5V power for driving audio circuits in portable applications such as cellular phones and multimedia notebook computers
  • DC power supply - simple circuit based on 78xx fixed voltage regulator IC, those ICs are available for some fixed voltages between 5 and 24V
  • Explanamtion and experiment about regulated DC power supply - many power supply designs for different voltages, built from discrete components
  • High Current Power Supply - takes very few parts and outputs up to 10A, regulation not very good
  • Increasing Regulator Current - you can boost 78xx regulator output with one power transistor
  • Logic PSU with Over Voltage Protection - 5 volt regulated power supply for TTL and 74LS series integrated circuits, includes output overvoltage fault protection
  • Low-drop regulator - outputs 5V at 1A, constructed from discrete components, in postscript file format
  • MOSFET circuit ups regulator's output current - use a current mirror and a power MOSFET to increase the output-current capability of an IC-voltage regulator
  • Power Supply for Preamplifiers - gives +/-15V outputs and takes power from external AC power supply
  • Power supply with +5V, +15V and -15V outputs
  • Regulated 12 Supply - provides a regulated 12 volts at 0.5 amp to a load, built from discrete components
  • Regulated Power Supplies - many designs, for 6V to 400V, both tube and transistor based designs
  • Regulator excels in noise and line rejection - certain electronic circuits require extremely low-noise power supplies and this circuit provides very good quality power output
  • Regulator generates sub-bandgap voltages - 100-mA regulator that uses a dual linear-regulator IC to produce output voltages below 1.25V from 2.9 to 5.5V input-voltage range
  • Sam's Schematic Collection of various circuits - includes many regulated power supply circuits
  • Simple 5V power supply for digital circuits
  • Three terminal refulator with current boost option - for 5V output voltage
  • Ultra Low Drop Linear Regulator - MOSFET based linear voltage regulator with a voltage drop of as low as 60 mV at 1 ampere, output 12V up to 3A, includes short-circuit crow-bar protection to guard the components against over-stress during accidental short at the output
  • Voltage Regulator - simple regulated 12V power supply using one transistor regulator circuit
  • Zener voltage regulators - not as good as 78xx's, but still fun
    
    
• Einstellbare Spannungsversorgung
  • Adjustable power supply using LM317 - voltage regulator for 1.2V to 35V output voltages and up to 1A load
  • Adjustable Power Supply - well filtered variable 1.2-30 volts at 5 amps using LM338K
  • Dual Power Supply - adjustable two output laboratory power supply with meters, circuit designed by Joel T. Retanan, 222k pdf file
  • L200 Regulator Circuit - easy to build a power supply with one single L200 IC, offers a variable current limit of up to 2 A, as well as voltage regulation
  • Three terminal adjustable voltage regulator with boost
  • Variable 3 - 24 Volt / 3 Amp Power Supply - regulated power supply can be adjusted from 3 to 25 volts and is current limited
  • Self-switching Power Supply - output variable from 3.7V to 8.7V and supply switches itself off when no load is connected across its output terminals
  • Simple regulator circuits for regulating DC power - regulators built from zener diodes and transistors
  • Säädettävä jännitelähde 0-24V 4A - 0-24V 4A adjustable power supply, text in Finnish
  • Variable Power Supply - based on versatile L200 voltage regulator, independent voltage (3-15V) and current (10mA-2A) limits
    
    
• Schaltregler
  • Step-up Konverter
    • 2 Watt Switching Power Supply - from 6V to 14V
    • 6V to 12V Converter - can provide up to 800mA of 12V power from a 6V supply
    • A low cost step-up converter - inputs 9-15 V and outputs 12-25V, maximum output power is 18V and 3A
    • Battery booster delivers 75W - uses isolated DC/DC converter in a nonisolated configuration to boost a 48V battery voltage to 60V
    • Battery-powered 5 V source - takes anything between 0.9 and 12 V and automatically steps it up or down to 3 or 5 V, at your discretion
    • Boost converter controls 12V fan from 5V supply - temperature-controlled PWM boost converter allows operation of a 12V brushless dc fan from a 5V supply
    • Boost converter generates three analog rails
    • Charge Pump Voltage Quadrupler - Simple circuit that will quadruple +12V input voltage
    • Coilless step-up converter yields dual outputs - provides regulated 5 and 3V supplies from a wide input range without the need for inductors
    • Converter has high efficiency at low loads - micropower components and circuit design of this converter enable it to maintain 90% efficiency for load currents below 8 mA, circuit outputs 5V DC
    • DC to DC Converter - will produce a 85V voltage from +3V, usable for low power applications
    • DC to DC Converter - low power converter which converts 3V to 85V, uses standard 12 VAC center tapped power transformer and single bi-polar NPN transistor
    • Hex inverter makes low-cost switching regulator - simple and low-cost circuit converts 5V to 12V
    • High power 12 V to 300 V invertor for high repeat rate medium power strobes
    • Li-ion boost circuit uses no inductors - circuit to mainstain regulated 3.3V supply for portable applications
    • Low-cost switcher converts 5 to 24V - low-cost, three-transistor low power boost switching regulator
    • Panel meter power supply - isolated 9.1V 2-5 mA output from 8-30V input, in pdf format, text in Finnish
    • Step-up/step-down converter takes 2 to 16V inputs - switcher where input can range above and below the regulated voltage, circuit accommodates a wide range of input and output voltages and supplies output currents as high as 500 mA
      
      
  • Step-down Konverter
    • 3.3-V Supply Taps Power From The 12 V PCI Bus
    • 5-to-1.8V Converter Works Without Magnetics
    • Add trimmable current limit to dc/dc supply - you can add a simple, two-transistor circuit to a standard, step-down dc/dc converter to provide an adjustable limit for the output current
    • Boost controller drives buck converter - by adding an external switching transistor, you can use a step-up dc/dc converter to step down voltages to produce an efficient battery-powered power supply, this example circuit can step down inputs as low as 2V to outputs as low as 1.25V, with efficiency as high as 80%
    • Buck regulator generates flexible VTT for PECL - circuit to generate output which can both source and sink current
    • Circuit provides 1.5V, 7A bus termination
    • Inductorless converter provides high efficiency - produces a regulated 2V output with as much as 100 mA of load-current capability from 2.4 to 6V input voltage
    • Single resistor improves V2 converter - V2 control offers a significant improvement in transient response by using two voltage feedbacs, example circuit is for generatign voltages in 1.8-3.3V range
    • Step-up/step-down converter takes 2 to 16V inputs - switcher where input can range above and below the regulated voltage, circuit accommodates a wide range of input and output voltages and supplies output currents as high as 500 mA
    • Switched-capacitor regulator provides gain - switched capacitor idea to convers 12V to 3.3V or 5V
    • Three-input supply powers 3.3V portables - single-ended primary-inductance converter accepts input voltages ranging from 3 to more than 6V and produces a regulated 3.3V, 200-mA output
    • Wall-cube dc/dc converter is 85% efficient - ubiquitous 12V wall cube generates an unregulated dc voltage of 8 to 18V, depending on line voltage and load, this circuit generates a regulated 5V 400 mA from it very efficiently
      
      
  • isolierte DC-DC Konverter
    • Flyback circuit provides isolated power conversion - convert an unregulated 48V line to an isolated 5V, 15W output
    • Isolated telecomm converter handles 25W - telecomm applications in the central office require an isolated 5V supply derived from ­48V, this gives out 5V at 5A from an input voltage of ­36 to ­72V
    • Low-power converter has galvanic isolation - this simple dc/dc converter provides a 12V, 150-mW output using only a few components and a small transformer, CD4049 forms an oscillator that operates at approximately 200 kHz and runs the converter, regulated output
    • Off-hook phone line supplies 150 mW - circuit draws current in the off-hook condition, delivering as much as 150 mW of isolated poser while allowing normal voice or data communications over the phone line
    • Push-pull driver provides isolated 5V at 1A - regulated 5V input to an isolated 5V output with 1A current-output capability