Measuring self resonant frequency:  Coilcraft - Power Magnetics Application Note - (app note added 6/06)

Measuring sensitivity of transponder coils:  Coilcraft - Power Magnetics Application Note - (app note added 6/06)

Memory Supply Includes Battery Backup:  02/03/97 EDN-Design Ideas / (added 3/03)

Method provides fast glitch free isolation of I 2 C and SMBus signals:  06/24/04 EDN Design Ideas  /  (added 2/05)  I 2 C is a popular serial protocol for power controllers, ADCs and DACs, EEPROMs, and other devices. In certain data-acquisition and power-control situations, you must isolate the I2C master from one or more slave devices for noise, grounding, or safety issues. Also, although 128 peripherals may connect to the bus, at some point, differences in ground potential and excessive bus capacitance ......

Method provides overpower protection for quasiresonant supplies:  10/28/04 EDN Design Ideas Online (added 1/05) The main characteristic of quasiresonant switch-mode power supplies is that they exhibit a varying frequency when the input voltage changes. 

Method to Reduce DC Power Consumption in CDMRF Power Amplifiers Through the LMV225 and an Efficient Switcher:  National Semiconductor - Application Note   (app note added 2/06)

Micropower 600kHz Step-Up DC/DC Converter Delivers 5V at 1A from a Li-ION Cell:  DN179 -  Design Notes (Linear Technology) (app note added 2/06)

Micropower DC/DC Converter with Independent Low-Battery Detector (LT1304):  DN120 -  Design Notes (Linear Technology) (app note added 2/06)

Module Flatness – Generic Specification:  Baseplate flatness of power modules Application Note Microsemi APT0503 (app note added 4/08)

Monolithic DC/DC Converters Break Speed Limits to Shrink Board Space:  DN125 -  Design Notes (Linear Technology) (app note added 2/06)

MOSFET H-Bridge Schematic and Theory:  (Circuit / schematic design added 6/06)

Mounting Instructions for Sp4 Power Modules:  Application Note - Advanved Power Technology - APT0501  (app note added 6/06)

Mounting Instructions for Sp6 Power Modules:  Application Note - Advanved Power Technology - APT0601  (app note added 6/06)

Multicarrier WCDMA Feasibility:  AN-807 - Analog Devices Application Notes  (app note added 6/06)

Multiple Output DC/DC Converter Runs Off 2-Cell AA Batteries USB or AC Wall Adapter:  DN1006 -  Design Notes (Linear Technology)  (app note added 1/06)

Negative Flyback with V in 12 V and V out-5 V:  This reference design is for a -12V at 1A Negative Flyback Converter. The UC3572 converts a positive input voltage to a regulated negative output voltage. The chip is optimized for use in a single inductor negative flyback switching converter employing an external PMOS switch.  (added 3/05)

Network linearizes DC/DC converter's Current limit characteristics:  10/13/05   EDN -- Design Ideas  / (added 11/05)   Thermistor adds to efficiency, eliminates sense resistor.

New 500v Linear MOSFETs for A 120kw Active Load:  Power MOSFETs are generally designed as switches. Total power dissipated is the sum of "on"-state losses (Id2 x Rds(on)) plus losses generated during the very short switching intervals. Desirable characteristics include the lowest possible ON resistance, high breakdown voltage, very high gain (gfs or Gm), minimum switching losses, and a low gate threshold voltage VGS(th). Application Note Microsemi APT0002 ( app note added 4/08)

New High Efficiency Monolithic Synchronous Step-Down Regulator Works with Single or Dual Li-ION Batteries:  DN201 -  Design Notes (Linear Technology) (app note added 6/06)

New Production Technique for Trimming Voltage Regulators:  National Semiconductor - Application Note   (app note added 2/06)

New Ultrafast Recovery Diode Technology Improves Performance Of High Frequency Power Circuits (Presented At Hfpc ‘93 Usa):  Application Note - Advanved Power Technology - APT9301  (app note added 6/06)

Notebook Power Supply has Two Outputs:  03/03/94 EDN-Design Ideas / (added 3/03) The notebook-computer supply in Fig 1 powers the 5V logic and derives an adjustable -24V supply for an LCD's backplane. The design uses only a high-efficiency buck regulator (Si9150) and an NMOS/PMOS, dual-power-FET chip set (Si9943), eliminating the extra parts required when you implement both supplies independently. Because of the low on-resistances of the dual FETs, this circuit can achieve better than 92% efficiency at 7.2V input and full-load output (7.6W)....

Off Hook Phone Line Supplies 150 MW:  09/01/94 EDN-Design Ideas / (added 4/02) For systems that require 150 mW or less, the power supply in Fig 1 draws power from ordinary phone jacks without interrupting the voice signal, thereby eliminating the need for batteries and ac adapters. Built into peripheral equipment such as PCMCIA modem cards, this circuit can spare the battery in a host computer. The circuit is useful in portable systems that connect to subscriber (household) telephone lines, such as modems and telephone test sets....    

Off Line Power Supply Requires Few Parts:  02/17/94 EDN-Design Ideas / (added 3/03) -This simple non-isolated off-line power supply can provide up to150 mA5V and uses only a handful of components from110-230-Volt AC input voltage. Note that the low voltage output is directly connected to the mains; it cannot be used when the low voltage part can be touched.

Off-Line 5.0V Output Non-Isolated Linear:  Supertex Semiconductors  (app note added 2/06)

One 9 Volt Battery gives +18 +25 +33V:  This circuit is based on MAX1044 is a charge pump converter. (added 4/02)

Open loop power supply delivers as much as 1W:  01/18/01 EDN - Design Ideas / (addes 08/05)  For VCRs, TVs, and other equipment that requires a standby mode, you must supply power to a µP when other components are asleep to receive and interpret any wake-up signal from the remote control or from the broadcasting company. These types of systems have rather low power consumption, and classical switch-mode power-supply ICs represent a clear overkill for less-than-1W output levels. Any active power-supply circuit also needs to be more cost- effective than the standard structure using a metallic transformer. The circuit in Figure 1 reduces the cost by eliminating the use of the optocoupler.

Optimized DC/DC Converter Loop Compensation Minimizes Number of Large Output Capacitors:  DN186 -  Design Notes (Linear Technology) (app note added 1/06)

Optimizing a DC/DC Converter’s Output Capacitors with the LTC1435A:  DN198 -  Design Notes (Linear Technology) (app note added 1/06)

Optimizing Bluetooth Device Battery Drain Measurements in Manufacturing:  Agilent Application Note   (added 6/06)

Optimizing Output Power - App Note 8:  Apex Microtechnology Corp - App Note - (added 6/06)

Optimizing The Design Of 35kw Single-MOSFET Power Factor Correctors:  This paper will define MOSFET gate drive requirements for minimum power losses and lowest EMI, evaluate the layout techniques necessary to limit turn-off voltage overshoots, and provide comparative data on package and mountdown options able to deliver up to 3500W power output from 230V 50/60Hz AC mains. Application Note Microsemi APT9901 ( app note added 4/08)

OTP µC Controls Boomer Amplifier:  03/18/99 EDN-Design Ideas / (added 5/03) Figure 1 shows a circuitthat uses a one-time-programmable (OTP) µC in an unusual way. A COP8SGR7 µC uses digital signals to "bit-bang" an LM4835 (dubbed "Boomer" by National) amplifier. Although the amplifier is designed for potentiometer control, you can modify it to make it a fully digitally controlled part. Figure 2 shows the flow chart for the control process. A PWM signal and a lowpass filter allow you to use digital signals to control the amplifier. The technique sets the µC in processor-independent mode. You load the values affecting the duty cycle into the appropriate timer registers. When a control bit goes high, the µC delivers a PWM signal....