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Converters Voltage
Power Supplies -- Main Page           Converters -- Main Page

Voltage Converters:  #'s - B      C - K      L - Q      R - Z

Last Updated:  Tuesday October 24, 2017 02:54:41 PM


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

 
 

DAC & Op Amp provide variable-control voltage -  12/06/01 EDN-Design Ideas Early DACs contained standard R-2R ladder networks, and produced a negative output voltage.  These early DACs, such as the MAX7837/7847 and the MAX523, require both positive and negative supply rails to accommodate their negative output.  With the transition to single-supply ICs, however, many modern DACs operate with a single supply rail and an inverted R-2R ladder network__ Circuit Design by Chad Olson, Maxim Integrated Products, Sunnyvale, CA

DC Voltage Multiplier Plans -  Build a circuit to boost the voltage of a DC power source using a MAX756 IC Chip.   __ Designed by REUK-Renewable Energy UK website

DC/DC Converter Increases Available Power in Dual Voltage SystE - M -  01/08/04 EDN-Design Ideas The schematic in Figure 1 shows a way to increase the power available from a current-limited 5V supply by adding power from a -5V supply.  The DC/DC converter generates a single 12V, 150-mA (1.8W]output from two regulated and curre__ Circuit Design by David Kim, Linear Technology App Note, Milpitas, CA

DC/DC converter operates from phone line -  01/15/98 EDN-Design Ideas DC/DC converters for use inside the telephone handset require operation from the high-source-impedance phone line.  Additionally, the CCITT specifications call for maximum on-hook power consumption of 25 mA.  The DC/DC converter in Figure 1 is 70%-efficient at an input power of 25 mA, providing 5V at 3.4 mA.  Controlled, low-peak switch__ Circuit Design by Gary Shockey, Linear Technology Corp, Milpitas, CA

DC-DC converter starts up & operates from a single photocell -  03/20/13  EDN-Design Ideas Reduce the parts count from the suggested data sheet circuit of this energy harvester.  __ Circuit Design by Larry Suppan

DC-DC converters -  Two converters are shown here.  One powers a VCR or similar device from a car battery, while the other powers a model airplane glow plug from 12V. __ Designed by Manfred Mornhinweg

DC-Voltage Doubler Reaches 96% Power Efficiency -  07/15/10 EDN-Design Ideas Analog switches let you charge a capacitor from two directions__ Circuit Design by Marián Štofka, Slovak University of Technology, Bratislava, Slovakia

Design Notes 503: Dual DC/DC Controller for DDR Power with Differential VDDQ Sensing & ±50mA VTT Reference -  11/01/13  EDN-Design Notes   Solid-state circuit breaker for microcontrollers.  The LTC3876 is a complete DDR power solution, compatible with DDR1, DDR2, DDR3, and DDR4 lower voltage standards.  The IC includes VDDQ and VTT DC/ DC controllers and a precision linear VTT reference.  A differential output sense amplifier and precision internal reference combine to offer an accurate VDDQ supply.  The VTT controller tracks the precision VTTR linear reference with less than 20mV total error.  The precision VTTR reference maintains 1.2% regulation accuracy, tracking one-half VDDQ over temperature for a ±50mA reference load.  __ Circuit Design by Ding Li

Desktop Power Supply from a PC -  This ATX PS board has leads for +5 (RED) , -5 (WHITE) , +12 (YELLOW) , -12 (BLUE) volts, Ground (BLACK) and switch (GREEN).  Dell power supplies manufactured between 1996 and 2000 do not follow the industry standard pinout and color codes.  The fan has also been unplugged for better viewing.  Since this PS was converted for use in the logic and robotics labs, the selected voltages  __ Designed by Andy Batts

Differential-To-Single-Ended Converter -  03/14/96 EDN-Design Ideas The circuit in Figure 1 addresses applications in which you need to convert a differential-current output to a single-ended voltage.  Several analog modules, such as the MC1495 multiplier and the LM1596 modulator/demodulator, provide differential-current outputs.  You can adjust R5 to adjust the voltage gain over the range of 5 to 201 to accommodate your application(added 07/08/09]__ Circuit Design by Hooman Hashemi, National Semiconductor Corp, Santa Clara, CA

Digital potentiometer programs & stabilizes voltage reference -  05/30/02 EDN-Design Ideas The potentiometer portion of a mixed-signal, digitally programmable potentiometer adds variability to an analog circuit, and its digital controls provide programmability.  You can use a digital potentiometer in two ways in an analog circuit.  You can use it as a two-terminal variable resistance, or rheostat, or as a three-terminal resistive divider__ Circuit Design by Chuck Wojslaw, Catalyst Semiconductor, Sunnyvale, CA

Digitally Programmable-Gain Amplifier Uses Divergent-Exponential Curve -  01/08/09  EDN-Design Ideas The divergent-exponential and negative time constants are the core concepts of the DENT (differential-divergent-exponential-negative-time-constant] digitally programmable-gain-amplifier topology__ Circuit Design by W Stephen Woodward, Chapel Hill, NC

Diodes improve inverter efficiency  -  04/29/99  EDN-Design Ideas –  NOTE :  Scroll to find this circuit.   In "Switched-capacitor regulator provides gain" (EDN, March 13, 1998, pg 80) a switched-capacitor voltage inverter wired as a supply splitter steps a positive voltage down to an output voltage equal to half the supply voltage.__ Circuit Design by Jeff Witt, Linear Technology Corp, Milpitas, CA

Direct Current Ignition Reference Design -  This manual describes a reference design of a Digital Direct Current Ignition for Motorbike by using the MC68HC908JK3.  The Motorola MC68HC908JK3 is a member of the HC08 Family of microcontrollers (MCUs).  It is a 8-bit low cost general purpose MCU with 16-bit free run timer.  The features of the MC68HC908JK3 include input capture and output __ Designed by Freescale

Don't Be Fooled by Voltage Reference Long-Term Drift & Hysteresis -  DN229 Design Notes___ Linear Technology/Analog Devices

Doozy requiring some parts you can't get at the 'Shack -  You can make a doozy of a xenon strobe using the 12 volt DC in,  __ Designed by Don Klipstein

Doozy requiring some parts you can't get at the 'Shack. -  You can make a doozy of a xenon strobe using the 12 volt DC in, DC output mercury lamp ballast here at http://www.  donklipstein.  com/ebdc12.  html.  You may run into a problem with the flashtube arcing continuously after a flash.  If you use an open-collector comparator such as a 339 in the overvoltage sensing section of this circuit, you can wired-AND the comparator output with some sort of scheme to disable the circuit for a few to a few tens of milliseconds after a flash (by "pulling down" Pin 5 of the 555).   __ Designed by Don Klipstein

Double Data Rate Power Supply using the Tl5002 Voltage Tracking Regulator -  The TL5002EVM-180 synchronous buck converter provides a 12A reference design for evaluating the performance of the TL5002 PWM control IC and the TPS2837 MOSFET driver for Double Data Rate (DDR) memory applications.   __

Dual +/  15 Volt Power Supply -  suitable for powering OpAmp circuits __

Dual 12V Power Supply -  Schematic only __ Designed by Tony van Roon  VA3AVR

Dual DC/DC Controller for DDR Power with Differential VDDQ Sensing & ±50mA VTT Reference -  11/01/13  EDN-Design Notes   Solid-state circuit breaker for microcontrollers.  The LTC3876 is a complete DDR power solution, compatible with DDR1, DDR2, DDR3, and DDR4 lower voltage standards.  The IC includes VDDQ and VTT DC/ DC controllers and a precision linear VTT reference.  A differential output sense amplifier and precision internal reference combine to offer an accurate VDDQ supply.  The VTT controller tracks the precision VTTR linear reference with less than 20mV total error.  The precision VTTR reference maintains 1.2% regulation accuracy, tracking one-half VDDQ over temperature for a ±50mA reference load.  __ Circuit Design by Ding Li

Dual output LDO 250mA/500mA evaluator with load simulator -  TPS70151EVM-152 provides a convenient method for evaluating the performance of TPS701xx dual output linear regulators.  The EVM provides proven and demonstrated reference designs and test modes to aid in evaluation.   __

Dual Polarity Amplifier has Digital Control -  09/12/96 EDN-Design Ideas The circuit in Figure 1 can amplify a signal either in an inverting or a noninverting mode.  When switch S1 is on and S2 is off, the circuit behaves as a regular inverting amplifier.  When S2 is on and S1 is off, the circuit feeds the signal to the noninverting input of the op amp; thus, the circuit behaves as a noninverting amplifier.  If S1 and S2 are monolithic analog switches, you__ Circuit Design by Rick Downs, Dallas Semiconductor Corp, Dallas, TX

Dual power supply Delivers 8A with no heat sinks -  03/30/00 EDN-Design Ideas The circuit in Figure 1 is a high-current dual supply that provIdeas 5 and 3.3V at currents as high as 8A.  The circuit uses a fixed-frequency, two-output, current-mode synchronous-buck- controllerPFD contains several circuits, scroll to find this one__ Circuit Design by John Seago, Linear Technology Corp, Milpitas, CA

Dual Regulated Power Supply-PS - U -  In this circuit, the 7815 regulatates the positive supply, and the 7915 regulates the negative supply.  The transformer should have a primary rating of 240/220 volts for europe, or 120 volts for North America.  The centre tapped secondary coil should be rated about 18 volts at 1 amp or higher, allowing for losses in the regulator.  An application for this type of circuit would be for a small regulated bench power supply __ Designed by Andy Collison

Emergency strobe flasher generates 250V -  08/05/99 EDN-Design Ideas Figure 1 shows a complete circuit for an emergency lamp that operates from a 12V automotive battery.  The xenon flash tube requires a 250V-dc anode voltage and a 4-kV trigger pulse.  To generate the 250V dc, IC1, __ Circuit Design by Jose Luis Arce, Tecnosuma Havana, Cuba

Ep68 3.3 V 2 a DC-DC Power Supply -  This design kit is a 3.3  V / 2 A (6.6 W) DC-DC converter that is based on a DPA423G device.  This design is intended as an evaluation platform for DPA-Switch devices in the low cost surface-mount DIP package.   __

Ep-71 3.3 V 2 a DC-DC Power Supply -  This design kit is an isolated 3.3  V, 2 A (6.6 W) DC-DC converter utilizing a DPA423G.  This design is intended as an evaluation platform for DPA-Switch devices in the 8-pin DIP, low cost surface-mount package.   __

EPR-000014 9 V 0.33 a 3 W Tny264 Adapter -  This design kit is a 9 V, 0.33 A, 3 W output and universal input power supply utilizing the TNY264P.  For evaluation, a fully built and tested prototype (EP14) can be found within the Design Accelerator Kit, DAK-14.   __

Epr-54 Linkswitch 2.75 Watt Low Cost Charger/Adapter -  This design kit is a 5.5 V, 500 mA charger/adapter power supply.  The power supply utilizes the LinkSwitch LNK520 device, optimized for bias winding feedback.  The LinkSwitch integrates a 700 V MOSFET, PWM controller, start-up, thermal shut-down, and fault protection circuitry.   __

Extend the input range of a low-dropout regulator -  10/17/02  EDN-Design Ideas Because of process limitations, all ICs have an input-voltage limitation.  This limitation can be cumbersome when you try to step down a high supply voltage to a lower, regulated voltage using a DC/DC converter, such as a linear re__ Circuit Design by Jeff Falin, Texas Instruments, Dallas, TX

Finesse Regulator Noise -  System designers often find themselves battling power supply hum, noise, transients, and various perturbations wreaking havoc with low noise amplifiers, oscillators, and other sensitive devices.  Many voltage regulators have excessive levels of output noise including voltage spikes from switching circuits and high flicker noise levels from unfiltered references __ Contact: Charles Wenzel of Wenzel Associates, Inc.

Floating Input Extends Regulator Capabilities -  DN21 Design Notes __ Linear Technology/Analog Devices

Floating Supply for LCD Panel Meter -  NOTE : Scroll downDid you ever install one of those low-cost LCD panel meters in a project only to discover that it requires a floating power supply? I just did! The meter cannot share a DC ground with the voltage to be measured. The above circuit came to the rescue. It draws about 4 or 5 mA from the 9 volt supply and can supply up to 2 mA at 9 volts to the LCD meter or other load but the two capacitors isolate the grounds. Works like a champ!  __ Contact: Charles Wenzel of Wenzel Associates, Inc.

Flyback switcher works down to 1.1V, flashes HBLEDs -  EDN-Design Ideas 11/03/2014     Check out this DI if you need voltage step-up from a single cell.   This Design Idea shows a way to drive low-power electronic circuits using a single 1.5V cell.  The design is based on a free-running oscillator that drives a flyback transformer to  generate a controllable higher voltage.  It can be used to power analog circuitry, microcontrollers, and any other light loads.__ Circuit Design by R O Ocaya

Fully Isolated, Single Channel Voltage & 4 mA to 20 mA Output with HART  -  Start the EVAL-CN0321-SDPZ software and proceed through any dialog boxes that appear.  Software The main software window is shown in Figure 3.  From the HART tab, data can be entered into the Command box and sent over the 4 mA to 20 mA loop, and the software can be set to poll for any data on the 4 mA to 20 mA loop___ Analog Devices from the Lab

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Voltage Converters:  #'s - B      C - K      L - Q      R - Z

 


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