±12V supply accepts 9 to 30V inputs - 12/04/97 EDN Design Ideas: For applications that require symmetric supply voltages from a wide input range, the switch-mode supply in Figure 1 delivers more than 3.6W at �12V and operates from inputs of 9 to 30V. Over this input range, efficiency varies from 74 to 80%. The step-down switching regulator, iC1, includes an internal switching transistor that drives the primary side of the flyback transformer. Matched output windings produce the ±12V outputs. Design by Ron Young, Maxim Integrated Products, Sunnyvale, CA ±4 to ±18 Volt, 500 Milliampere D.C. Power Supply - This is a simple, general-purpose power supply intended for laboratory applications that require both a positive and negative current. The circuit uses commonly-available integrated circuit regulators that provide integral thermal overload protection as well as safe-area limiting. These devices also provide regulation characteristics which are better than standard, fixed-voltage, three terminal regulators such as types 7812 and 7912 __ Designed by Arthur Harrison
µC controls charge pump as background task - 08/01/97 EDN Design Ideas: Because of power consumption and cost, designers of battery-powered devices mainly choose components that run at 3V or lower. Unfortunately, many devices operate only at 5V, including LCDs with built-in drivers, programming lines of many EEPROMs and flash chips, and CMOS
ADCs Design by Carlos Cossio, Santander, Spain
How to Build a Versatile 0 to 12 Volt Adjustable DC Power Supply Unit - Building the proposed circuit of 0 to 12 volt adjustable DC power supply is so simple that it may be even assembled even by a any electronic noob within half an hour. Moreover, the maximum output voltage may not be restricted to just 12 volts, rather can be extended up to 32 volts (continuously variable) by just modifying the transformer ratings appropriately. The whole operation becomes amazingly simple just due to the presence of this outstanding IC - LM 338. __
Bright Hub Engineering
0.2V Supply Voltage Nanopower Inverter - Circuit ideas for Designers App Note__ Advanced Linear Devices, Inc
0.2V Supply Voltage Nanopower Two-Inputs NOR & NAND gates - Circuit ideas for Designers App Note__ Advanced Linear Devices, Inc
0.2V Supply Voltage N-Channel Transmission Gate - Circuit ideas for Designers App Note__ Advanced Linear Devices, Inc
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,. . . Circuit by David A. Johnson P.E.-July, 2006
0.5v to 6v Voltage Converter - Conventional silicon transistors just can't operate at voltages less than about 0.7v. Old germanium transistors could be used, but those are hard to find these days and most are rather large in size. Some new n-channel MOSFET devices with very . . . Hobby Circuit designed by David Johnson P.E.-May, 2007
0-50V 2A Bench Power Supply - i use the lm10 IC because it has a reference voltage and that's useful for dc power supply. With two ICs can take different output voltage and amperage. This circuit is protected from short circuit. P2 is for controlling the current at the range of 0-2A. Stabilize the output voltage with R4 on negative pin on op-amp and with R2 & P1 on positive pin __ Contact hamed_iranmehr @ yahoo.com
1 Cell Flashes White LED - 12/11/03 EDN Design Ideas: Many portable appliances and other products that must operate from a single cell are restricted to working at very low voltages. it is thus difficult to drive white LEDs that typically have a forward voltage of 3 to 5V. The ability Design by Anthony Smith, Scitech, Biddenham, Bedfordshire, UK
1 cell lights any LED - 07/05/01 EDN Design Ideas: The circuit in Figure 1 allows you to light any type of LED from a single cell whose voltage ranges from 1 to 1.5V. This range accommodates alkaline, carbon-zinc, NiCd, or NiMH
single cells. The circuit's principal application is i Design by Al Dutcher, Al Labs, West Deptford, NJ
1 IC Biases LCD & GaAsFET Amplifier - 04/09/98 EDN Design Ideas: (File , contains several circuits, scroll to this one) Operating from a lithium-ion cell or a four-cell NiCd battery, the circuit in Figure 1provide as 6V bias for LCDs and a separate, quiet negative bias for a GaAsFET power ampli Design by John Wettroth, Maxim Integrated Products, Apex, NC
1 Watt Fluorescent Lamp Night Light - if you are tired of replacing small night light lamps, try this circuit. The line powered circuit uses a long life cold cathode fluorescent lamp. A simple charge pump technique runs the lamp without any transformer. . . Circuit by David A. Johnson P.E.-March, 1999
1.3V Power Supply - This is a replacement power source for 1.3V mercury cells or other 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 thermometer __ Designed by Andy Collinson
1.5V, 7A Bus Termination - 09/14/95 EDN Design Ideas: Some of the newest high-performance processors require a 1.5V bus terminator that can source currents as high as 7A. This terminator requires a very fast transient response, because the device must react to high peak-current changes that have extremely fa Design by Chester Simpson and Mineo Yamatake, National Semiconductor, Santa Clara, CA
10 Khz VFC uses Charge Pump Variation - 04/09/98 EDN Design Ideas: (Several circuits included, scroll to find this one) A diode-capacitor charge pump is the starting point for many voltage-to-frequency-converter (VFC] designs. The circuit in Figure 1 uses a variation on that classic theme to achieve linearity less than 0.05%, micropower operation of approximately 10-�A total draw from a 5 to 36V rail, and bipolar-input capability Design by Stephen Woodward, University of North Carolina, Chapel Hill, NC
10µA Quiescent Current Step-Down Regulators Extend Standby Time in Handheld Products - DN235 Design Notes__ Linear Technology/Analog Devices
100ma UltraLow Noise Charge Pump LED Supply with Output Current Adjust - LTC3201__ Linear Technology/Analog Devices
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. This is a cheap-and-dirty experimenter's circuit. I tested this and it worked for me, but I disclaim all warranties! __ Designed by Don Klipstein
10A High Performance Point-of-Load DC/DC µModule - DN385 Design Notes__ Linear Technology/Analog Devices
10A μModule step-down regulator with advanced input & load protection - EDN Design Ideas: 07/01/2015 This switcher design has comprehensive electrical and thermal protection, and high efficiency over wide input-output ranges Design by LTC Design Note |