Circuits: Supply

1. Improve efficiency of low-cost switcher
   Peter Demchenko EDN Low-current switching regulator ICs often use a Darlington as the output switch. The power conversion efficiency in this case can be improved with the help of only two cheap components. To make this possible, the chip should ...
   Circuits » Supply » ON Semiconductor » MC34063
   04-07-2018
2. Transistors drive LEDs to light the path
   Eliot Johnston EDN Keeping low-voltage outdoor lights illuminated takes some effort. Bulbs burn out, and connections corrode. HB LEDs (high-brightness light-emitting diodes) seem like acceptable replacements, but most are available only in ...
   Circuits » Supply · Light » Cree » C535A-WJN
   20-06-2018
3. Use an optocoupler to make a simple low-dropout regulator
   Marc Ysebaert EDN Although a monolithic low-dropout regulator has superior dynamic characteristics, the discrete regulator in this Design Idea is so simple that you can adapt it to many purposes. Using a common transistor, it has a dropout voltage ...
   Circuits » Supply » Vishay » SFH617A
   14-06-2018
4. Active Rectifier Controller with Ultrafast Transient Response and Low Power Dissipation
   Bin Wu, Analog Devices Design Note 572 Introduction The LT8672 is an active rectifier controller that (along with a MOSFET) provides reverse current protection and rectification for power supplies in automotive environments. This job is ...
   Circuits » Supply » Analog Devices » LT8650S, LT8672
   14-06-2018
5. Power an LED driver using off-the-shelf components
   T A Babu EDN High-power LEDs challenge electronics engineers to design accurate and efficient, yet simple, driver circuits. Conventionally, driving high-power strings with accurate current requires dedicated switching regulators. Choosing a ...
   Circuits » Supply · Light » Texas Instruments » NE555
   07-06-2018
6. Transistors offer overload delay
   Christophe Basso EDN Although an SMPS (switch-mode power supply) can protect itself against permanent short circuits, it sometimes has problems when dealing with transient overloads. Transient overloads are not short circuits but can push the power ...
   Circuits » Supply » ON Semiconductor » NCP1200
   05-06-2018
7. Cascode MOSFET increases boost regulator's input- and output-voltage ranges
   Scot Lester EDN Targeting use in portable-system applications that require raising a battery's voltage to a higher level, IC boost regulators often include output transistors that can drive storage inductors. However, most boost regulators' ...
   Circuits » Supply » Texas Instruments » TPS61040
   23-05-2018
8. Supervise and power-sequence an SOC
   Eric Schlaepfer, Maxim Integrated Products EDN Microprocessors, microcontrollers, and SOCs (systems on chips) often need a reset pulse to initialize properly. Many of these devices also use separate I/O- and core-voltage supplies. When you use ...
   Circuits » Supply » Maxim » MAX6418
   23-05-2018
9. External components provide true shutdown for boost converter
   Navid Mostafavi EDN The step-up switching-converter circuit in Figure 1 presents a familiar problem: If you shut down boost converter IC 1 by pulling its /SHDN input low, external inductor L 1 and forward-biased Schottky diode D 1 allow the load to ...
   Circuits » Supply » Maxim » MAX756
   10-05-2018
10. 1000V Output, No-Opto Isolated Flyback Converter
    George Qian, Michael Wu, Analog Devices Design Note 1047 Introduction Isolated flyback converters are used in automotive, industrial, medical and telecom applications where the power supply must be reliable, easy-to-use, high voltage and isolated, ...
    Circuits » High Voltage · Supply · Power » Analog Devices » LT8304-1
    27-04-2018