Power supply category

TPS61092 Boost Converter on Test Bench

luckyresistor.me tests his TPS61092 boost converter with a thermal camera and shares the results.

For my current project I searched for a good boost power converter which is able to deliver continuous 400mA power for various sensors.

There are an endless number of good boost converters around, but not many can be hand soldered to a board. I would really like to see some like the TPS61092 with SOIC or similar packages. The biggest problem seems to be the heat transport, why most chips have to be mounted flat on the board.

TPS61092 Boost Converter on Test Bench – [Link]

Isolated Power Supply for RS485, RS422, RS232, SPI, I2C and Power LAN

Mini Isolated Power Supply is designed for CAN, RS-485, RS-422, RS-232, SPI, I2C, Low-Power LAN applications. The power supply provides +/- 5.50 V DC symmetrical outputs with load current 500mA from 5V DC input. The project is built using SN6505A IC from Texas instruments. The SN6505A is a low-noise, low-EMI push-pull transformer driver, specifically designed for small form factor, isolated power supplies. It drives low profile, center-tapped transformers 5 V DC power supply. Ultra-low noise and EMI are achieved by slew rate control of the output switch voltage and through Spread Spectrum Clocking (SSC). The SN6505 consists of an oscillator followed by a gate drive circuit that provides the complementary output signals to drive ground referenced N-channel power switches. The device includes two 1-A Power-MOSFET switches to ensure start-up under heavy loads. The internal protection features include a 1.7A current limiting, under-voltage lockout, thermal shutdown, and break-before-make circuitry. SN6505 includes a soft-start feature that prevents high inrush current during power up with large load capacitors.

Isolated Power Supply for RS485, RS422, RS232, SPI, I2C and Power LAN – [Link]

Flex Power Modules launches 1000W DC/DC advanced bus converter

Based upon Flex Power Modules’ Hybrid Regulated Ratio (HRR) topology, the BMR480 DC/DC bus converter module delivers up to 1000W and 96.2A peak power.

The BMR480 DC/DC advanced bus converter targets high-end and high-power applications. It is available in an industry-standard and low-profile quarter-brick-format with dimensions of 58.4 x 36.8 x 12.19mm (2.30 x 1.45 x 0.48-inch), and operates from a wide input range of 40 to 60V and offers multiple tightly regulated (±2.5 per cent) pre-programmed outputs at 10.4, 12 and 12.5V but can be factory configured at any voltage between nine to 13.2V.

Flex’s Hybrid Regulated Ratio technology enables better use of the powertrain to deliver high-power conversion across its input voltage range. The BMR480 offers power conversion of up to 97 per cent efficiency – at 53V and half load – while also keeping power losses low, says Flex.

As well as suitable for intermediate bus conversion (IBC), dynamic bus voltage (DBV) and distributed power architectures (DPA), the BMR480 power module has been designed to power high-end and high-power applications powered by multi-cell batteries or rectifiers that are commonly used in ICT (information and communication technologies) applications. It can also be found in networking and telecommunications equipment, industrial equipment, and server and storage applications.

The BMR480 is reliable, says Flex, delivering higher useable power in high ambient temperature and limited-airflow environments. Although supplied with a standard baseplate, it can also be connected to a heatsink or coldplate for extremely challenging thermal environments.

Dynamic load compensation and support for the latest version (v1.3) of the PMBus communication specification and the Ericsson Power Designer software tool are significant features of the BMR480, together with droop load sharing capability, 1500V I/O isolation, monotonic start-up, remote control, and a range of protection capabilities including over-temperature, output-short-circuit and output-over-voltage.

Flex Power Modules, a division of Flex, designs and manufactures scalable power supply solutions that improve the operational efficiencies of advanced data centre, IT information and communications networks. Flex Coldwatt products provide a complete on-board system solution for cloud, storage and server applications.


Designing a Small Footprint, Low Profile 5v to 170v Nixie Tube Power Supply

Nixie Tubes are cool retro looking decimal digit displays useful for many modern DIY projects like the venerable Nixie Tube digital clock.   The Nixie Tube, invented in the 1950’s, can provide a great fusion of old display technology with new innovations.  Unfortunately, one major difficulty in using them is that Nixie tubes need voltages up to 170V to energize.  While this voltage can be made several ways, a convenient way and the subject of this blog is to generate this voltage from a 5v supply.  This will allow the use of the same 5v supply used to power the Raspberry Pie, an ESP8266, an Arduino or another microcontroller that controls the display or IOT project.

Designing a Small Footprint, Low Profile 5v to 170v Nixie Tube Power Supply – [Link]

60V input 5V @3A output DC-DC Converter for Industrial and Automotive

This is a 60 V 3A step down DC-DC converter. Sample applications are: 12 V, 24 V and 48 V Industrial, Automotive and Communications Power Systems. The TPS54360 is a 60 V, 3 A, step down regulator with an integrated high side MOSFET. The device survives load dump pulses up to 65V per ISO 7637. Current mode control provides simple external compensation and flexible component selection. A low ripple pulse skip mode reduces the no load supply current to 146 μA. Shutdown supply current is reduced to 2 μA when the enable pin is pulled low. Under voltage lockout is internally set at 4.3 V but can be increased using the enable pin. The output voltage start up ramp is internally controlled to provide a controlled start up and eliminate overshoot. A wide switching frequency range allows either efficiency or external component size to be optimized. Frequency fold back and thermal shutdown protects internal and external components during an overload condition.

60V input 5V @3A output DC-DC Converter for Industrial and Automotive – [Link]

1.2V-25V/10A Adjustable Power Supply Using Power Op-Amp

This is a small size power supply based on OPA549 power op-amp that provides output voltage 1.2V to 25V with 0 to 10A adjustable current limit. Two onboard trimmer potentiometers provided to adjust the voltage and current, LED D1 is over temperature indicator. The circuit works with input supply of 30V DC and logic supply 5V DC. IC requires large size heat sink to work with full 10A current range. Screw terminals for input and output connections are provided. The OPA549 is a low-cost, high-voltage/high-current operational amplifier ideal for driving a wide variety of loads. This laser-trimmed monolithic integrated circuit provides excellent low-level signal accuracy and high output voltage and current. The OPA549 operates from either single or dual supplies for design flexibility. The input common-mode range extends below the negative supply.

1.2V-25V/10A Adjustable Power Supply Using Power Op-Amp – [Link]

Flexipower – A portable, Controllable, Dual Channel Power Supply

Hobbyists, makers, students and pretty much everyone who works with electronics has encountered the same issue, not having a handy power supply to test their projects. Usually, controllable power supplies are big, expensive and for some people difficult to access, and most small power supplies are not controllable. As a result, Roberto Lo Giacco created Flexipower, a small, portable, flexible, and remotely controllable dual channel power supply.

Flexipower is controlled via a mobile application and its battery operated. It can work up to a voltage of 20 V and a current of 1 A (per channel). Power supply is powered by two cell Li-Ion or Li-Poly batteries which provide 8.4 v when fully charged, to reach higher voltages the battery is fed into a voltage step up circuit, and to get lower voltages the battery is fed into a high current linear voltage regulator. Also, a simple voltage divider along with the 10-bit ADC is used to measure the produced voltage, and adjust accordingly.

Current measuring is done through a 1 Ohm shunt resistor network made by ten 10 Ohm resistors in parallel which results in 1 mV voltage drop per mA. In the case of currents lower than 320mA, the integrated circuit INA219 is used to obtain a very precise reading. When the supplied current goes above the capacity of the INA219 the shunt resistor voltage drop is measured using the 10 bit ADC.

As mentioned before, Flexipower uses 2 rechargeable batteries that are charged via a barrel jack connecting a 12 V source capable of around 1 A. An RGB LED is used to inform the user about the status of the device (power on, battery warning, connection status etc.). The LED is also used to indicate the battery status. Additionally, each channel has a green/red LED to indicate if it is enabled (green), or over current (yellow).

Furthermore, the device can create “Flexipower SSID”, an access point for people to connect and control the power supply. The app was created to avoid using a big LCD screen with limited data logging capabilities. The app allows control, unlimited data logging and visualization just with the use of a smartphone.

For complete specifications, list of materials used, schematics and app download go to official website. The creator always tried to minimize components costs while still providing a lot of capabilities. It still can be improved, but it’s a project that could make the life of people easier. Its important to clarify that this device is not a replacement for benchtop power supplies, but for portability is a great option.

Torpedo 2 – a cheap & powerful 3A DC/DC converter with built-in charger

Boris Landoni @ open-electronics.org presents their second version of Torpedo, a kind of DC-DC converter able to provide 5V output from a variety of sources. He writes:

Some time ago we had introduced you to the Torpedo switching power supply, a particular kind of DC/DC power supply called SEPIC capable of supplying 5 V from several external supply sources, such as an external voltage between around 3.5 and 20 V, the 5 V coming from a USB connector or the 3 to 7 V supplied by a LiPo battery. The very small power supply also had a circuit capable of charging the battery up through external sources, where available.


  • triple power source: USB, LiPo battery and an external source;
  • a wide range of input voltage values: 6,5 – 18 V;
  • can supply a maximum current of 3 A;
  • high efficiency, even over 85-90%;
  • built-in charger for LiPo single cells;
  • can switch from battery-powered to another source without interruption;
  • 5 V output with high stability when load varies and low ripple;
  • possibility to turn off the only output leaving the step-down converter and the charger active;
  • possibility to automatically deactivate the output if power supply comes from the USB connector which is limited to 500 mA current by the specs; if there is a battery, power supply is granted by that;
  • status LEDs indicating charge, the power supply used, output activation and so on.

Torpedo 2 – a cheap & powerful 3A DC/DC converter with built-in charger – [Link]

2 X AA Battery To 6V Boost Converter For Arduino Nano

This project is simple solution to power Arduino Nano from two 1.5V batteries. Circuit converts 2 X AA alkaline battery power into 6V 100mA using boost topology. Circuit uses SOT223-6 pin TLV61046A boost converter IC. The TLV61046A is a highly integrated boost converter designed for applications such as PMOLED panel, LCD bias supply and sensor module. The TLV61046A integrates a 30-V power switch, an input to output isolation switch, and a rectifier diode. It can output up to 28 V from input of a Li+ battery or two alkaline batteries in series. The TLV61046A operates with a switching frequency at 1.0 MHz. This allows the use of small external components. The TLV61046A has typical 980-mA switch current limit. It has 7-ms built-in soft start time to reduce the inrush current. The TLV61046A also implements output short circuit protection, output over-voltage protection and thermal shutdown. R1 and R2 connected to FB pin to set the output voltage 6V. R1 and R2 can be altered to set higher output voltage, refer data sheet for calculation. The board can be used as Arduino Nano shield or as stand-alone boost converter. It directly fits on top of the Arduino Nano and output is connected to VIN and GND pins of Nano.

2 X AA Battery To 6V Boost Converter For Arduino Nano – [Link]

R&S®NGE100 power supply series with WiFi option

The R&S®NGE100 power supply series consists of robust, high-performance, affordable instruments. They offer high efficiency combined with low ripple plus a variety of comfort functions that are not usually found in this class of power supplies.
The R&S®NGE100 power supply series consists of the R&S®NGE102 two-channel power supply and the R&S®NGE103 three-channel power supply. Both instruments provide up to 33.6 W output power per channel Unlike most power supplies in this class, the R&S®NGE100 power supplies feature 100 % electrically equivalent output channels. All outputs are earth-free and short-circuit-proof. The output channels can be combined in serial or in parallel to achieve higher voltages or higher currents (up to 96V/9 A using all three channels of the R&S®NGE103).

Key Facts

  • R&S®NGE102 with two or R&S®NGE103 with three channels
  • Max. output power of 66 W with R&S®NGE102,
  • 100 W with R&S®NGE103 (33.6 W per channel)
  • Max. output voltage of 32 V per channel (up to 64 V/96 V in serial operation)
  • Max. output current of 3 A per channel (up to 6 A/9 A in parallel operation)
  • Electronic fuse (OCP), overvoltage protection (OVP), overpower protection (OPP), over temperature protection (OTP)
  • USB interface (VCP/TMC), optional LAN (LXI), optional wireless LAN
  • Optional digital I/O (4bit)

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