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Testing inductors at application frequencies - Coilcraft Power Magnetics
Application Note (app note added 6/06) |
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Testing LCD Backlight Inverters using the Agilent N6700 Modular Power System MPS -
Agilent Application Note....[App Note] |
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The 3G Power Game: Quiescent Current & Intelligent Biasing - MicroNote 709
from Microsem....[App Note] |
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The Output Adjustable Flyback Converter - [Circuit Design by Simon
Inhwan Oh] |
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Thermostat for 1KW Space Heater SCR controlled - Here is a simple thermostat
circuit that can be used to control a relay and supply power to a small space heater
through the relay contacts. The relay contacts should be rated above the current
requirements for the heater. Temperature changes are detected by a (1.7K @ 70F)
thermistor....(added 10/05) |
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Three Input Supply Powers 3.3 Volt Portables - The single-ended
primary-inductance converter (SEPIC) of Figure 1 accepts input voltages ranging from
3V to over 6V, and produces a regulated 3.3V, 200mA output. It accepts an input
voltage from three sources: a 5V dc wall cube, a 3-cell AA battery, and a lithium
backup battery. Maxim Application Note 136 (app note added 2/06) |
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Three 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.... EDN is migrating links. This link is not verified.
Google the "title" EDN for new link. |
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Three Phase Voltage Multiplier - The Cockcroft-Walton turbine voltage
multiplier…. [REUK - Renewable Energy UK website] |
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Transformer Buys Lower Shutdown Current - 11/23/94 EDN-Design Ideas....The
step-up dc/dc converter in Fig 1 trades a slight loss in efficiency and a transformer
in place of a less expensive inductor for two important advantages The inductor
offers low shutdown current because the transformer eliminates a leakage path. The
circuit stays in regulation, even if the input.... EDN is migrating links. This link
is not verified. Google the "title" EDN for new link. |
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Transformer Design Consideration for off-line Flyback Converters Using Fairchild Power
Switch FPStm/ AN-4140 - Fairchild Application Notes / (app note added 6/06)
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Transformerless dc/dc converter produces bipolar outputs - 29-Apr-04 Issue
of EDN The conventional way to produce dual (positive and negative] outputs from
a single positive input is to use a transformer. Although such designs are relatively
simple, the transformer inherently introduces the problem of size. It can be
challenging to fit a transformer into an application in which it's important to
minimize the circuit footprint and height.... [Design Idea by David Kim, Linear
Technology Corp, Milpitas, CA] |
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Transformerless Power Supplies: Resistive & Capacitive - Microchip
Application Note Published 22-Sep-04 (app note added 2/06) |
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Transformerless Power Supply - Circuit designed by Ron J |
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Transformerless Supply Fits CATV Applications - 05/22/97 EDN-Design
Ideas....Coaxial CATV systems derive their power from a 60-Hz square wave that shares
the center conductor with the television channels. You often need to place active
devices along the distribution path. If the dc-power requirements for these devices
are small, you can use a transformerless power supply.... EDN is migrating links. This
link is not verified. Google the "title" EDN for new link. |
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Transistor pair lowers PWM IC's start-up current - 03/18/99 Issue of EDN
An auxiliary winding usually provides power for the popular UC384X-based offline
switch-mode power supplies (SMPSs]. This winding feeds the main PWM controller
during steady-state operation. However, the controller always needs a small start-up
current, which clearly plagues the efficiency in very low-power standby SMPSs with
POUT =500 mW, for example. Any wasted source power, such....Page includes several
designs. Scroll to find this one.... [Design Idea by Christophe Basso, Motorola
Semiconductor, Toulouse, France] |
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Transistors tame perfidious leakage inductance - 27-Sep-01 Issue of EDN
In flyback converters that use primary regulation, the loose coupling between the
power secondary and the primary auxiliary windings often results in poor
cross-regulation. This situation arises mainly from the leakage inductance but
also comes from the level of the primary clamp voltage. Figure 1 shows a typical
application schematic using On Semiconductor's (www.... [Design Idea by Christophe
Basso, On Semiconductor, Toulouse, France] |
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Triac lighting and heating controller uses few parts - 2-Sep-04 Issue of EDN
The triac lighting-control circuit in Figure 1 is small and inexpensive because load
and housekeeping power come directly from the line voltage, thereby eliminating bulky,
expensive supplies. The CLZD010 closed-loop controller maintains constant light
intensity by automatically adjusting the timing of the triac's firing until the
feedback signal and setpoint command are equal.... [Design Idea by David Caldwell,
Flextek Electronics, Carlsbad, CA] |
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Turn an ordinary wall wart/ plug-pack into a regulated device - (diagram
added 05/07) |
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Turn Off Snubber Design for High Frequency Modules - Turn-off snubbers are
passive circuits made of diodes, resistors and capacitors dedicated to storing energy
for a short period to: Decrease switch power losses during turnoff and Modify
switching I-V diagram to fit safely within the switching safe operating area
Application Note Microsemi APT0404 ( app note added 4/08) |
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Two amp variable power supply - (circuit / schematic added 08/08/08)
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Two Channel Gate Driver for Large IGBT Modules - The BG2A is a fully
isolated two channel gate drive Circuit designed for use with dual IGBT modules. The
BG2A utilizes Powerex VLA500-01 or VLA502-01 hybrid gate drivers to provide efficient
switching of modules rated up to 1400A. The hybrid gate driver features a built-in
high speed opto-coupler, short circuit protection and an isolated DC to DC converter
with 2500VRMS isolation. (added 3/05) |
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Two Cores Marry Make Swinging Choke - 05/11/95 EDN-Design Ideas....Designing
an output choke for a switch-mode power supply that must operate over large load
variations can be problematic. If you design the inductor for the maximum load the
power converter will see, the inductance will be below the critical inductance
required at light load. This inadequate inductance will cause the voltage on the
output capacitor to peak up, resulting in increased ripple on the output....[Design
Ideaadded 2/06] EDN is migrating links. This link is not verified. Search the
"title" EDN for new link. |
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UCC3809 Evaluation Module - The UCC3809EVM evaluation module is an isolated
10-W, 3.3-V converter designed for telecom input voltages, nominally -48 Vdc, but
ranging from -32 Vdc to -75 Vdc. The UCC3809 economy primary-side controller is used
as the pulse-width modulator (PWM), combined with a TLV431 low-voltage
adjustable-precision shunt regulator....(added 3/05) |
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Ultra-Low Power High Efficiency DC/DC Converter Operates Outside the Audio Band -
DN86 Design Notes (Linear Technology) (app note added 1/06) |
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UltraLow Quiescent Current DC/DC Converters for Light Load Applications -
DN142 Design Notes (Linear Technology) (app note added 2/06) |
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Unique High Efficiency 12V Converter Operates with Inputs from 6V to 28V -
DN233 Design Notes (Linear Technology) (app note added 1/06) |
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Universal Balancing Techniques - National Semiconductor Application Note
(app note added 2/06) |
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Universal DC-to-DC Converter - This circuit will generate a smaller DC
output voltage from a larger DC input voltage.It is quick and simple to make and by
changing the value of the zener diode, the circuit can be universally adapted to
provide other output voltages.The circuit and all diagrams represent a DC convertor
with 12V battery input and 9Volt DC output....(circuit / schematic design added 6/06)
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Universal High Resistance Voltmeter - .... |
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Use a 555 timer as a switch-mode power supply - 14-Nov-02 Issue of EDN
Most switch-mode power supplies rely on a PWM (pulse-width-modulated] output that is
controlled via voltage feedback. A 555-timer IC can inexpensively perform PWM. The
circuit in Figure 1 shows how to turn a 555 PWM circuit into an switch-mode power
supply with only one simple equation. The design uses two 555s.... [Design Idea by
Aaron Lager, Masterwork Electronics, Rohnert Park, CA] |
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Use a microcontroller to design a boost converter - 4-Mar-04 Issue of EDN
Boost converters, like other switchers, have traditionally received their control
signals from a dedicated circuit. However, a recent trend is to integrate simple
switching-power-supply building blocks into generic devices, such as microcontrollers.
An excellent example of this concept is a microcontroller that combines digital and
analog circuitry and makes it easier to build simple power supp.... [Design Idea by
Ross Fosler, Microchip Technology, Chandler, AZ] |
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Use the Built-In Measurement Capability of Power Sources & Loads - Agilent
Application Note....[App Note] |
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Use the LM158/LM258/LM358 Dual Single Supply OpAmp - National Semiconductor
Application Note 14 May2001 (app note added 7/02) |
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Using NTC Temperature Sensors Integrated into Power Modules - Application
Note Microsemi formerly Advanced Power APT0406 (app note added feb 2006) |
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Using the DS4412 to Margin the Output Voltage of a DC-DC Converter - Maxim
App Note 4197 -- 3/20/2008 -- (app note add 5/08) |
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Variable DC Power Supply (linscott) - This power supply is based on the
LM317 Variable Regulator. The input of the regulator needs to be around 28 Volts DC
and it will output a DC voltage from 1.25vdc to 25 vdc. To adjust the output voltage
simply turn the 5k ohm pot. The regulator will supply 1.5 amps of current….(added
05/08) |
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Variable Voltage Regulator (Ron J) - As Ron suggests, controlling the output
voltage from a regulator can be made variable in three ways....(electronic design
added 6/07) |
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VDSon VCEsat Measurement - Application Note Microsemi formerly Advanced
Power APT0407) (added 2/07) |
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Voltage Multiplier Circuit - A collection of simple but useful circuits made
with silicon diodes. Scroll to find the voltage multiplier circuit…. |
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Wallcube DC/DC Converter is 85% Efficient - 09/12/97 EDN-Design
Ideas....Ubiquitous12V wall cube generates an unregulated dc voltage of 8 to18V,
depending on line voltage and load, this circuit generates a regulated5V400 mA from it
very efficiently.... [Design Idea by Steve Pietkiewicz, Linear Technology Corp,
Milpitas, CA] |
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World’s First Dual 12-Bit DACs in SO-8 LTC1446/LTC1446L - DN131 Design
Notes (Linear Technology) (app note added 1/06) |
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Xenon DC-to-DC Converters! - (design circuit added 8/02) |
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ZXSC100 Power Supply for Digital Still Camera - Zetec Semiconductors
Applications Notes ZXSC100 single cell DC-DC converter offers an ideal solution to
driving white LEDs in flashlights, enabling operation from a single NiCd or NiMH cell.
(app note added 2/06) |
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Use two phases to cut current and improve EMI 11/12/09 EDN-Design Ideas....In
dc/dc-converter applications in which the input voltage may be lower or higher than
the output voltage, you can use either a flyback converter or a SEPIC
(single-ended-primary-inductor converter). SEPICs offer lower input-current ripple and
higher efficiency than do flyback designs. Both converters suffer from relatively high
output-current ripple, especially at high load currents and low input voltages. As
output-current ripple increases, so does the circuit's output-filter-capacitance
requirement, which increases size and cost.... [Design Idea by Goran Perica, Linear
Technology, Milpitas, CA] |
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