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13 Jul 2015


Power supply filtering, an application note from Maxim Integrated:

If sensitive analog systems are run from one supply without the sufficient bypassing to eliminate noise, undesired degradation in a system’s performance will result. This application note provides insight into suitable techniques to overcome this roadblock.

App note: Eliminate noise through proper supply bypass filtering – [Link]

7 Jul 2015


by Martin Cooke @ elektormagazine.com:

Bench power supplies aren’t really pieces of kit that get your pulse racing, they just sit there doing their job, in some cases giving gentle background heating to keep the lab warm in the winter and providing enough ballast to stop your bench wobbling about too much. The traditional bench top power supply always came with a sturdy handle on the top to give you a clue that inside is some serious ironwork and that this beast is going to be heavy. But that was all yesterday; buy a power supply today and it doesn’t look much different from any other piece of test gear; covered in buttons with a TFT display and the chances are you can wrap your hand around it and pick it up one-handed. That’s true of the HMC8043 three channel 100-watt bench power supply from Rohde & Schwarz I received for reviewing.

Rohde & Schwarz HMC8043 PSU: Review and Teardown – [Link]

3 Jun 2015


by TrichogasterAzul @ instructables.com:

This instructable is about a universal short circuit protection that I’ve designed to use in bench power supplies. I’ve designed it to fit in most power supplies circuits. In order to this circuit fit in your bench power supply, you will need to do some calculations, but don’t worry, I’ll explain everything on the next steps.

Short circuit protection for (almost) any power supply – [Link]

21 May 2015

The design of the circuit is a DC to DC converter. It supports up to 1.5A on VCORE. It features a DC/DC converter that provides power to MCUs. It also deals with the optimization of energy consumption by using DC/DC linear regulators and ultra-low-power saving modes. The model contains a Serial Peripheral Interface (SPI), an advanced functional safety measure that allows control and diagnostics with the MCUs.

The KIT33907AEEVB and KIT33908AEEVB evaluation boards demonstrate the functionality of the SMARTMOS MC33907 and MC33908 power system basis chips, respectively. These ICs are equipped with an intelligent power management system including safety features targeting the latest ISO26262 automotive functional safety standard. The evaluation board is a standalone board that can be used either with a compatible microcontroller or with PC. In the latter case, it is necessary to use a KITUSBSPIDGLEVME accessory interface board. The MC33907 and the MC33908 are multi-output ICs with power supply and HSCAN transceiver. These devices have been designed specifically for automotive market. All features of thse two ICs are the same except that the MC33907 is designed to support up 800 mA on VCORE, while MC33908 will support up to 1.5A on VCORE.

The DC to DC converter that supports up to 1.5A on VCORE has the following applications: electrical power steering, engine management, battery management, active suspension, gearbox, transmission, electrical vehicle (EV), hybrid electrical vehicle (HEV) and advanced driver assistance systems

Safe DC/DC Converter up to 1.5 A – [Link]

21 May 2015


The Breadboard Power Supply includes AMS1117 5V voltage regulator and AMS1117 3.3V voltage Regulator, providing fixed supply voltages. It features three voltage input options: a screw terminal connector, DC adapter connector and USB connector. It can operate on 6-12V DC power supply and has separate screw terminals for 3.3V and 5V outputs.

The AMS1117 series of adjustable and fixed voltage regulators are designed to provide up to 1A output current and to operate down  to 1V input-to-output differential. The dropout voltage of the device is guaranteed maximum 1.3V,decreasing at lower load currents.

Hardware and PCB were designed with Cadsoft Eagle 7.1.0 version.

Breadboard Power Supply – [Link]


20 May 2015


This project will provide 3.3 V @ 800 mA DC Regulated Supply. The project is based on the LM1117 Low-Dropout Linear Regulator. The LM1117-3.3 is a low dropout voltage regulator with a dropout of 3.3V @ 800mA of load current.

3.3V Voltage Regulator – [Link]

19 May 2015


by xKOBAYASHIMARUx @ instructables.com:

Buck Converters are great! I use them all over the place in many of my nerdy, techy, geeky hobbiest projects. They also can commonly be referred to by other names, a DC-DC converter or a switching regulator. Essentially what it does is take some higher voltage in (higher than what you want for your project), chops it up, and pieces together a lower voltage. It might help to think of it as a transformer for DC circuits… only without the giant iron block… and without the long coils of wire… and with only 3 pins.

Buck Converter (DC-DC) – [Link]

7 May 2015


Jayakody published a new project, a 3A Power supply for USB devices:

This is 5V 3A power supply to drive two USB based devices simultaneously. This power supply is design around LM2576-5.0 switching regulator IC and the main reasons to choose this IC is its low parts count, small heat sink requirements and its inbuilt current limit protection feature.
We specially design this power supply to work with development boards / single board computer (SBC) platforms such as Raspberry Pi, Banana Pi, BeagleBone, etc. This power supply can also be used to provide power to USB OTG peripherals over USB Y cables. We test this setup and got successful results with Huawei Ascend P6 mobile phone.

3A Power supply for USB devices – [Link]

28 Apr 2015


by Steven Keeping:

Such is the popularity of DC-to-DC voltage converters (“switching regulators”)––due to their high efficiency across wide input- and output-voltage ranges––that chip makers have focused a lot of research dollars on squeezing the essential components of the devices into modules. These modules typically include pulse-width-modulation (PWM) controllers and switching elements in a single, compact package, easing the design work for the engineer.

However, until recently, it has proven difficult to include the energy-storage device (the inductor) inside the package. This has dictated that the engineer must specify, source, and design-in the inductor as a peripheral component, adding complexity and consuming board space. Now, a new generation of high-frequency switching regulators has enabled the use of smaller inductors enabling the devices to be housed inside the component vendor’s package.

The Advantages (and Drawbacks) of DC-to-DC Voltage Converters with Integrated Inductors – [Link]

16 Apr 2015



This reference design from TI demonstrates the LM46002 SIMPLE SWITCHER® Synchronous Buck Converter and the LMZ21701 SIMPLE SWITCHER® Nano Module. The LM46002 provides a regulated 12V rail from an input of 15V to 60V. The 12V rail is then regulated down to 5V, 3.3V, and 1.8V rails using three LMZ21701 nano modules. Each rail can provide up to 1A of load current.  This modules’ wide input voltage capability and small solution size, ease of use, high efficiency and modular design was seen at APEC.

15V to 60V Wide Input Four-Output SIMPLE SWITCHER – [Link]





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