Technical solutions, industry trends and insights for designing and managing power supplies.
    • Apr 20, 2015

    PMICs – The smart, high-efficiency power solution for smart home applications

    When designing an energy harvesting application such as smart meters, thermostats or smart-connected homes, there are several critical factors to consider. You must maximize efficiency, avoid any components that can cause board leakages, and use the power-saving mode to avoid power loss. Using power-saving modes is the best way to design the most efficient...
    • Apr 16, 2015

    Controlling error in measuring power-supply efficiency

    Many elements go in to making excellent efficiency measurements in power supplies, but let’s concentrate here on temperature stabilization. Other concerns include quality and calibration of measurements and shunts. As efficiency requires two voltage and two current measurements, errors from the voltage and current meters used can stack up. With...
    • Apr 15, 2015

    Noise requirements for ADC power supplies

    So far in this blogs series, we’ve looked at the power supply rejection ratio (PSRR) of the ADC and the PSRR requirements for the prior power stage to ensure minimal noise. Before further analyzing the power supply, we need to understand the impact of supply noise on the ADC. In this blog, we will look into the thermal and flicker noise requirements...
    • Apr 11, 2015

    Easy SSD backup power

    Increasing the reliability of solid state drives (SSDs) by operating through brown outs and retaining all data during black outs is paramount. This level of reliability requires a back-up power system to be present in the SSD . This system must store significant energy, while being able to use (discharge) and replenish (recharge) the energy in the storage...
    • Apr 4, 2015

    Ditch the Diode and Win Your Design Race

    Over the last several years there’s been a ton of focus on integrated-inductor power modules within the world of SIMPLE SWITCHER® power devices . After all, what could be simpler than power supplies that only require two caps and one resistor external to the IC while still boasting excellent thermal and EMI performance? With the increased...
    • Apr 2, 2015

    Power Tips: How to control multiple loops in a power supply

    Power Tips: how to control multiple loops in a power supply Usually the output voltage of a power supply is regulated and provided to a load. In some cases, the output current can be regulated (such as in a LED application). Some applications do require more complex control, however. A battery charger uses two loops: one to control the output voltage...
    • Mar 31, 2015

    PowerTips: How to limit inrush current in an AC/DC power supply

    When powering up an AC/DC power supply, a huge amount of energy transfers from the power source to the bulk capacitor. In this installment of Power Tips we examine how to limit inrush current in an AC/DC power supply. Figure 1: Inrush current of a power supply at 120VAC/60Hz input As a result of powering up an AC/DC power supply, you can observe...
    • Mar 30, 2015

    Which power supply sequencing solution is right for you?

    I was at a birthday party a few weeks ago and a guest I never met before asked me about my latest project at work. Immediately, I replied that I was working on a sequencing problem. The funny part is he automatically thought that I was i...
    • Mar 29, 2015

    Maximum power output of Fly-Buck converters

    The Fly-Buck converter (shown in Figure 1) is a simple method of generating low-power isolated bias rails because it does not require any compensation loop based on opto-couplers or extra windings to regulate the isolated output. The Fly-Buck is a pr...
    • Mar 27, 2015

    APEC 2015: A wrap-up and a look toward next year

    Another Applied Power Electronics Conference (APEC) has drawn to a close. I hope all of the attendees had an uneventful trip home. Over the years, APEC has changed for me. My first APEC was in 1999 (although I know plenty of you have attended for much longer than that); it was kind of like “speed dating.” You meet a lot of people in a very...