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Power Supplies:  DC to DC / Switch Mode and DC to DC Converters   Page 1
Boost,    Buck,    Buck-Boost,    Switchmode

Power Supplies -- Main Page           Converters -- Main Page
DC to DC:  #'s     A     B-C     D-F     G-K     L     M-O     P-R     S      T-Z
Last Updated on: Friday, February 05, 2010 10:05 AM


Circuits Designed by Dave Johnson, P.E. :
  • 0.5V Negative Supply
    Although not very efficient, this simple circuit, consisting of two LEDs and a photo diode, generates a negative voltage with a current level of a couple milliamps.  It is ideal for supplying a negative rail to low power “rail to rail” op amp circuits, which need to have a true zero volts output.  (added 12/04)


Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

.4 watt 100% Radio Shack DC-DC Converter - This DC-DC converter ("inverter") needs nothing but unmodified Radio Shack parts. You don't need to build or wind any coils or transformers…(added 08/08/08)

+/-5V Power Supply Operation with TC7106A/7107A TC7106A/7107A - Microchip Application Note Published 12-Nov-02  (app note added 6/06)

+30V DC-DC converter - introduce  compact DC-DC converter in this page. I found this converter at  junk shop. I attempted to examine  characteristic of this converter.  input voltage is +5 V,  output voltage is +30 V and can get  about 20-mA output current.  IC(CD-1846P) to be using with this converter becomes  manufacturing....(app note added 4/05)

+30V Power Supply with +5V - I made  power supply which makes about +30V with +5V power supply. Direct current is changed into  alternating current by  oscillator which used  schmitt trigger inverter which has  hysteresis characteristic and  resonance circuit.  high DC voltage (+50V) is made with  alternating voltage using  voltage amplification rectification circuit.  (app note added 6/06)

+5V Power Supply Circuit - (circuit / schematic design added 6/06)

+9 Volt*and*  9 Volt from One Battery! -  MAX1044 is a charge pump converter it uses a capacitor as a "bucket" to pump charge from one place to anor. It can be used to generate negative voltage easily. (added 4/02)

±12V supply accepts 9 to 30V inputs  - 12/04/97 EDN-Design Ideas: (design idea added 11/05)

0 to 300 Volt Adjustable Power Supply - This is a simple circuit that can provide an adjustable voltage source of0 to330 Volts.  supply is short-circuit proof: current is limited to about100mA. (added 6/06)

0.2V Supply Voltage Nanopower Inverter Circuit - Circuit Ideas for Designers Application Notes Advanced Linear Devices, Inc.  (app note added 6/06)

0.2V Supply Voltage Nanopower Two-Inputs NOR & NAND gates - Circuit Ideas for Designers Application Notes Advanced Linear Devices, Inc.  (app note added 6/06)

0.2V Supply Voltage N-Channel Transmission Gate - Circuit Ideas for Designers Application Notes Advanced Linear Devices, Inc.  (app note added 6/06)

0.5v Negative Supply - Although not very efficient, this simple circuit, consisting of two LEDs and a photo diode, generates a negative voltage with a current level of a couple milliamps.  It is ideal for supplying a negative rail to low power “rail to rail” op amp circuits, which need to have a true zero volts output. ….(designed by David A. Johnson)

1.3V Power Supply - This is a replacement power source for 1.3V mercury cells or or small batteries. It has many uses and I use this circuit in my computer to power a front panel multi adapter which has a digital rmometer.  (added 6/06)

10 Hints for using your power supply to decrease test time - Agilent Application Note  (added 6/06)

10 Practical Tips You Need to Know About Power Products 5965-8239E - Learn ten simple ways to improve your testing capabilities with your power supplies and electronic loads. Aligent Application Note  (app note added 2/06)

10-15w watt 100% Radio Shack DC-DC Converter - This DC-DC converter ("inverter") needs nothing but unmodified Radio Shack parts. You don't need to build or wind any coils or transformers.…(added 08/08/08)

10A High Performance Point-of-Load DC/DC µModule - DN385  Design Notes (Linear Technology)  (app note added 1/06)

1119 Simple Regulator Provides ±12 Volt from 5 Volt Source - National Semiconductor Application Note 31 Aug2001 (app note added 7/02)

12 Volt 30 Amp Power Supply (Andy Collinson) - uses a single 7812 IC voltage regulator and multiple outboard pass transistors, this power supply can deliver output load currents of up to30 amps (added 10/09)

12 Volt 6 Amp Solar Power Center - (Circuit added 11/06)

12 Volt DC Power Supply  - This is a simple low-cost 50W off-line switching power supply, which can be used for home projects or to learn operation of flyback converters. It can work over a universal AC line input range 90-264 VAC and provides a 12VDC output at more then 4A load. Line and load regulation is better then 0.5%. (added 11/07)

12 Volt Power Supply - Please operate caution when building this power supply. It is run on standard 117 ac current and under  right circumstances 117 ac can kill you. Use a plastic enclosure if possible to decrease chances of short-circuiting. Don't use  power supply if it's wet, and never run it without  specified fuse.  (added 6/06)

12V 30A PSU - (electronic design added 6/07)

12V to +/- 30V DC to DC Converter - This is a DC to DC converter for car power amplifier. 12V input generates +30V and -30V output for preamp or power amplifiers. Circuit uses SG3525 IC, Mosfets and switching power supply. ….(electronic schematic added 11/08)

12V to 28V DC-DC Converter with LM2585 - This boost regulator is for those times when you have a 28v relay, but want to use it with a 12v source. The circuit is built around the National Semiconductor LM2585, and uses the energy stored in an inductor to boost the 12v to 28. Output voltage can be varied by adjusting the ratio of resistor values on the feedback pin. ….(design added 11/08)

12V to 9V Car Converter - (Tony van Roon's electronic circuit added 4/05)

12V to 9V with a LM317 - (Tony van Roon's circuit added 9/04)

13 Volt Alarm Power Supply - (circuit / schematic design added 6/06)

15V/ 28V 4A Transmitter Power Supply - Power supply used for professional FM broadcasting transmitter. ….(electronic schematic added 11/08)

1A Variable Regulated Power Supply - A 'must-have' for the experimenter.  (electronic design 05/09)

1-transistor FM Transmitter - A truly minimalist circuit. Performance is relatively poor and stability is a problem. Q1 modulates  signal and acts as an oscillator. L1 and C5 determine  frequency. Decrease C5 for a higher frequency and vice-versa. You won't get a long range transmission with this one.....added 10/05)

2-Step Power Conversion: Portable Power for the Future - Design Solutions 8  Design Notes (Linear Technology)  (app note added 1/06)

3 input supply powers 3.3V Portables - 04/13/95 EDN-Design Ideas: The single-ended primary-inductance converter in Fig 1 accepts input voltages ranging from 3 to more than 6V and produces a regulated 3.3V, 200-mA output. The converter accepts an input voltage from three sources: a 5V dc wall cube, a three-cell AA battery, and a lithium backup battery.....(design idea added 6/06)

3.3 Volt Converter Delivers 3 Watt From Li ion Battery - 10/05/98 EDN-Design Ideas: Lithium-ion batteries are rapidly gaining popularity in portable applications because of their superior energy density, low self-discharge rate, and high cell voltage. When you use one Li-ion battery to power a 3.....(design idea added 08/05)

3.3V Lithium Cell Supply Requires One Inductor - 08/05/99 EDN-Design Ideas: Because of  growing popularity of lithium-ion (Li-ion)batteries and 3.3V power supplies, portable-equipment designers must often create a 3.3V supply that a single Li-ion cell can power.  fact.....(design idea added10/05)

3A Point-of-Load Power Supplies-MP1570-DN0004 - Monolithic Power Systems, Inc Design Note (added 6/06)

3-Phase LTC3733 Provides High Performance Power Solutions for AMD Opteron & Athlon 64 Processors - DN326  Design Notes (Linear Technology) (app note added 1/06)

48kw Resonant Converter for X-Ray Machines Uses High Speed Power Modules With Integral Liquid Cooling - This paper describes an innovative method for the removal of heat from the four IGBT power modules equipping a 48kW ZVS-mode resonant power converter for CT X-ray machines.  Application Note Microsemi APT9904  ( app note added 4/08)

5 to 1.8V converter works without magnetics - 04/13/00 EDN-Design Ideas:.....(design idea added 11/05)

5 Volt Power Supply - (electronic circuit added 9/03)

5 Volt Supply Derives Power from Three Wire RS232C Port - 10/26/95 EDN-Design Ideas: (design idea added 3/03)

5+ to 15- Volts DC Converter - National Semiconductor Application Note  (app note added 2/06)

5V to 3.3V Circuit Collection - DN91  Design Notes (Linear Technology) (app note added 2/06)

5V to 3.3V Regulator with Fail-Safe Switchover - DN82  Design Notes (Linear Technology) (app note added 2/06)

5V/1A Power Supply - ….(circuit design added 03/08)

6 to 12 Volt Converter (Aaron Cake) - This circuit can provide up to 800mA of12V power from a 6V supply. The circuit is simple, about 75% efficient and quite useful. (added 08/08/08)

6 x 6 Loop Antenna - This new loop antenna by Graham Maynard is his best design yet and I am proud to be the first to present his work. It uses one, six foot square, six turn loop, and is aperiodic in nature, covering the frequency range 50KHz, 5000KHz....(electronic design added 6/07)

60 MCurrent Source Feeds Telecomm Lines - 12/18/97 EDN-Design Ideas: (design idea added 3/03)

600 Volt Power Supply - simple 600 Volt DC power supply. Convert 230V AC to 300V and 600V DC. . (added 6/06)

60V 3A Step-Down DC/DC Converter has Low Dropout & 100µA Quiescent Current - DN352  Design Notes (Linear Technology)  (app note added 6/06)

60V Step-Down DC/DC Converter has Only 100µA Quiescent Current - DN1007)  Design Notes (Linear Technology)  (app note added 1/06)

66000 Modular Power System - Agilent Application Note  (app note added 6/06)

8 Switcher Powers High Performance µPs - 04/13/95 EDN-Design Ideas: (design idea added 3/03)

9 Volt 2 Amp Power Supply - A simple 9 Volt 2 amp supply using a single IC regulator. (added 6/03)

9-V Stabilized Power Supply - (Tony van Roon's electronic design / schematic added 2/06)


 
DC to DC:  #'s     A     B-C     D-F     G-K     L     M-O     P-R     S      T-Z
 

 

 
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