PMP9194 uses the TPS54020 synchronous-buck SWIFT converter with integrated FETs to provide a 10A/1V solution in less than 22mmx12mm of total board space area. This reference design uses a small 1.1uH inductor, 2x100uF ceramic output capacitors, and small 0402 external components to save space. The device switches at 300kHz and acheives 87% peak efficiency from a 12V input to a 1V output. The TPS54020 is ideal for powering low-voltage, high-current DSPs and FPGAs, and can be synchronized 180 degrees out-of-phase with another TPS54020 to reduce input ripple.
4.5V to 17V Input, 10-A Synchronous Buck Converter Optimized for Small Size and Low Output Voltage - [Link]
by sajjad Haidar @ edn.com:
A simple blocking oscillator circuit can be used to step up voltage using properties of coil inductance (V = L di/dt). Such a circuit is shown in Figure 1, which is more commonly called a Joule thief.
The output will be pulses of voltage that can be filtered using a diode and capacitor. As there is no regulation, the output voltage will vary with the input voltage or load. As this circuit uses a BJT, the supply voltage needs to be at least 0.7V to work, and with enhancement-mode MOSFETs, the supply voltage must usually be even higher.
MOSFET-based Joule Thief steps up voltage - [Link]
Spacewrench over at Dorkbotpdx published a new build, a Power Playground project:
It’s a PMOS/NMOS H-Bridge with FETs that can handle 3 amps or so, plus a SPI current sensor, some switches & a rotary encoder (not stuffed yet), and a 7-segment display, all controlled by a Teensy-3.1 running FreeRTOS.
I made this because I’m always running into battery, power, inductor and transformer issues I don’t have any experience with. The idea is to use the H-bridge configuration and current sensors to experiment with moderate-current PWM, motor control, power-line synchronization, battery charging and discharging, etc.
Power playground project - [Link]
App note(PDF) from NXP on DC-DC medium power small-signal MOSFETs.
This application note explores different methods of DC-to-DC conversion. It includes some examples of DC-to-DC down-converters using small-signal MOSFETs.
App note: Medium power small-signal MOSFETs in DC-to-DC conversion - [Link]
by Graham Prophet @ edn.com:
The MX100T from Aim-TTi (Aim Thurlby Thandar) is a 315W precision laboratory power supply’s three outputs can each provide 0 to 35 V at 0 to 3 A. Range switching extends the capabilities so that outputs can be set to 16 V/6 A or 70 V/1.5 A for maximum versatility; where higher power is needed from one output, internal switching circuitry enables up to 210 W arranged as either 35 V/6 A or 70 V/3 A.
All outputs are fully isolated and independent but voltage tracking can be selected to make two or even three outputs track a single voltage control. The isolated tracking capability is useful for creating tracking voltages to different ground points, tracking voltages of opposite polarity, or series and parallel connection of outputs.
Triple output lab power supply offers paralleling & tracking - [Link]
The board 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.
5V – 3.3V REG BOARD - [Link]
Who is the winner of umodule demoboard from Linear technology? In addition to getting to know the winner, you can also watch the video record from webinar…
Linear Technology’s family of DC/DC Module products simplifies your analog design. By integrating the DC/DC controller, power switches, magnetic, and a modest amount of capacitance, uModules power products will save precious space on the PCB and reduce the solution weight, development time, BOM qualification and procurement effort. You could find this out during webinar about Linear technology modules.From all of those who filled in our questionnaire after webinar we have drawn winner of the uModulu demoboard. The winner is František Bulko from EVPÚ a.s.
Congratulations to the winner.
Your way to simple and efficient power supply design with Linear Technology - [Link]
Very small power supply unit in the size of a cigarette box. The input voltage is 24V. Its supplied by a external switch mode AC/DC PSU. The output voltage range is 0V to 24V at 0A to 3A. A switch mode preregulator reduces the power loss. This allows a very compact design. Voltage and current are displayed on a RGB OLED display
Miniatur Power Supply Unit with 0..24V and 0..3A - [Link]
Programme of webinar:
Linear Technology’s family of DC/DC Module products simplifies your analog design. By integrating the DC/DC controller, power switches, magnetic, and a modest amount of capacitance, uModules power products will save precious space on the PCB and reduce the solution weight, development time, BOM qualification and procurement effort.
- Product groups and parameter ranges
- uModule construction
- Reliability data
- Features: ultralow noise, output sharing, synchronizability / multi-phase operation
- Information resources
- Applications examples.
SOS Webinar – Your way to simple and efficient power supply design with Linear Technology - [Link]
IP phones require data and power on the same cable. A high voltage power source of 48V is required, to reduce the voltage drop in the cable. This project has a DC-DC step-up converter that can deliver the required 48V supply at high efficiency. The MAX668 is an excellent choice for the design of this DC-DC step-up converter. The MAX668, a current-mode controller, operates in the PWM mode at medium and heavy loads, providing high-efficiency and low-noise. With power levels greater than 20W, efficiencies of more than 90% are achievable.
MAX668 48V IP Phone Power Supply – [Link]