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Power Supplies:  Switch Mode  Page 4
Switchmode Power Supply:  #'s-A,     B-E,     F-R,     S,     T-V
Boost,   Buck,   Buck/Boost

Power Supplies -- Main Page           Converters -- Main Page
Last Updated on: Thursday, November 30, 2017 01:58 PM


Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:
Self switching Power Supply -  One of the main features of the regulated power supply circuit being presented is that though fixed-voltage regulator LM7805 is used in the circuit, its output voltage is variable....
SIMPLE SWITCHER PCB Layout Guidelines -  National Semiconductor Application Note  (app note added 2/06)
Simple Switching Power Supply (karl lunt) -  I built a PCB for a simple switching power supply, originally designed by Keith Payea of the SRS.  It uses an LM393, a P-channel power MOSFET, and darn little else. Since its frequency varies based on load (and nearly everything else imaginable), you can use junk-box parts and build it for cheap....
Single FET Controls 2nd LED Array in Switchmode LED Backlight -  Maxim APP1871: Feb03,2003 / (app note added 5/08) -A design in which the display is backlit (or frontlit) for extended periods needs an efficient circuit that drives the LEDs with a controlled current, and eliminates...

Single IC Five Output Switching Power Supply System for Portable Electronics -  DN150  Design Notes (Linear Technology) (app note added 6/06)

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SMPS Basics-The Buck Converter -  ....(spice design added 02/09)
SMPS Power Loss -  ....(spice design added 02/09)
Soft-Start Controller for Switching Power Supplies -  Microchip Application Note Published 29-Nov-04  (app note added 2/06)
SPICE Predicts Differential Conducted EMI from Switching Power Supplies -  02/03/97 EDN-Design Feature  Spice not only can predict the exact EMI levels produced by a switched-mode power supply, but also can produce plots that allow you to easily evaluate your design and the effectiveness of the EMI filter. [Design Feature by Christophe Basso, Sinard, France]
Switch Mode Battery Eliminator Based on a PIC16C72a -  Microchip Application Note Published 25-Mar-99  (app note added 2/06)
Switch Mode DC Supply -  The switching power supply, shown in the schematic, provides12 volts, at10 amps, maximum, using a discrete transistor regulator with an op-amp functioning as a comparator in the feedback circuit. The supply was constructed in1984 and is variable frequency, as opposed to the pulse width modulator (PWM) controllers used today. (added 4/02)
Switched gain op amp serves as phase detector or mixer -  1-May-08 Issue of EDN  By switching the disable input of an op amp at a reference frequency and lowpass-filtering its output, you can obtain a dc voltage proportional to the phase difference.... [Design Idea by W Bruce Warren, Marietta, GA]
Switched Mode Regulator -  Battery Eliminator (circuit added 09/06)
Switched-capacitor IC and reference form elegant –48 to +10V converter 04/24/03 EDN-DEsign Ideas....A system designer must almost always face a trade-off in choosing the right part for an application. The trade-off usually involves performance, price, and function. An example is the issue of powering circuits from a telecom-voltage source. Telecom systems almost exclusively use high-potential negative rails, such as -48V.... [Design Idea by Wallace Ly, National Semiconductor, Santa Clara, CA]
Switched-capacitor voltage multiplier achieves 95% efficiency 10-Jun-10 Issue of EDN  A capacitor that you charge through a resistor operates at 50% efficiency; hence, many engineers avoid using switched-capacitor dc/dc converters. That efficiency figure holds true only for capacitors with no initial voltage, however. If you decide to switch a precharged capacitor, you can transfer energy to an output with a power-efficiency approaching 100%.... [Design Idea by Marián Štofka, Slovak University of Technology, Bratislava, Slovakia]
Switched-gain op amp serves as phase detector or mixer 05/01/08 EDV-Design Ideas....By switching the disable input of an op amp at a reference frequency and lowpass-filtering its output, you can obtain a dc voltage proportional to the phase difference…. [Design Idea by W Bruce Warren, Marietta, GA]
Switcher adds programmable-PWM-duty-cycle clamp -  27-Sep-07 Issue of EDN  A simple circuit adds a programmable duty-cycle clamp to an inexpensive, eight-pin PWM power-supply controller.... [Design Idea by Michael O’Loughlin, Texas Instruments, Nashua, NH]
Switcher IC hikes Battery Charger's Efficiency -  06/23/94 EDN-Design Ideas....The adjustable switching-regulator LM2575T-ADJ, IC1, in Fig 1 replaces a power-wasting pnp transistor in the data-book design for the NiCd battery charger IC2, a MAX713. (Its sister device, the MAX712, handles NiMH cells.]IC2 "fast-charges" cells by monitoring the cell's voltage and charging current until they exhibit.... EDN is migrating links. This link is not verified.  Search the "title" + "EDN" for new link.
Switching Converter uses Planar Magnetics -  11/07/96 EDN-Design Ideas....Planar-magnetics technology is growing in popularity as a design option for dc-dc converters. In addition to providing electrical benefits, planar magnetics offers reduced leakage inductance and improved consistency. It also significantly reduces the cost of magnetics if you integrate it into the printed-circuit board. To use planar magnetics in a dc-dc converter,.... [Design Idea by Andrew Cowell, Temic/Siliconix, Santa Clara, CA]
Switching regulator 2 -  (electronic circuit added 4/05)
Switching regulator forms constant-current-source -  30-May-02 Issue of EDN  Many applications require current sources rather than voltage sources. When you need a high-current source, using a linear regulator is inadvisable, because of the high power dissipation in the series resistor. To solve the wasted-power problem, you can use a switch-mode regulator. The circuit of Figure 1 uses IC1, an LM2576 adjustable regulator.... [Design Idea by Stefan Strozecki, Institute of Telecommunications, Bydgoszcz, Poland]
Switching Regulator Output goes BeLow VREF -  03/17/94 EDN-Design Ideas....The feedback arrangement of typical switching regulators doesn't allow the regulated outputs to go lower than the reference voltage. If you try to lower the output by modifying the feedback network, the compensation components the manufacturer recommends may no longer stabilize the regulator's error amplifier.... EDN is migrating links. This link is not verified.  Search the "title" + "EDN" for new link.
Switching regulator reduces motor brake's power consumption -  4-Jan-07 Issue of EDN  Inexpensive IC replaces relays and power resistsor.... [Design Idea by Alain Minoz, Elekta Instrument AB, Stockholm, Sweden; Edited by Brad Thompson and Fran Granville]
Switchmode Car Power Supply -  Low power +/-12V supply for car preamps and equalisers (etc) (electronic diagram added 6/07)
Switchmode Power Amp Supply -  A high power (350W typical) car power amplifier supply (electronic diagram added 6/07)
Switchmode PSU Protection -  This contributed circuit can help prevent failure of your switching power supply. (electronic diagram added 6/07)
Switchmode Power Supply:  #'s-A,     B-E,     F-R,     S,     T-V


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