Technical solutions, industry trends and insights for designing and managing power supplies.
    • Nov 22, 2017

    ESD fundamentals, part 1: What is ESD protection?

    If you’ve seen a lightning bolt or been unpleasantly shocked by a doorknob, you’ve been exposed to the phenomenon known as electrostatic discharge (ESD). ESD is the sudden flow of electricity between two charged objects that come into close proximity. Objects that are in contact sometimes cause a discharge of electricity to go directly from...
    • Nov 21, 2017

    Why a wide VIN DC/DC converter is a good fit for high-cell-count battery-powered drones

    More and more drone applications require high-cell-count battery packs to support longer flying distances and flight times. For example, consider a 14-series lithium-ion (Li-ion) battery pack architecture where the working voltage is 50V to 60V. When designing a DC/DC power supply for such a system, one of the challenges is how to select the maximum...
    • Nov 20, 2017

    FPGA power made simple: design steps

    Over the last three installments of this series, I have gone over some basic design considerations for creating a power supply for field-programmable gate arrays (FPGAs). Now that you have determined the power requirements and identified some necessary feature and performance specifications, you are ready to pick parts! One way to simplify FPGA power...
    • Nov 17, 2017

    Essential linear charger features

    As electronic devices become smarter with more built-in features, they become more attractive but also more power-hungry, making rechargeable batteries an obvious economical choice. Charger requirements have evolved in recent years, with innovative a...
    • Nov 17, 2017

    “Peak current-mode control” in an LLC converter

    In 1978, when Cecil Deisch worked on a push-pull converter, he faced a problem of how to balance the flux in the transformer and keep the core from walking away into saturation caused by slightly asymmetrical pulse-width modulation (PWM) waveforms. He came up with a solution of adding an inner-current loop to the voltage loop and let the switch turn...
    • Nov 15, 2017

    The D-CAP+™ Modulator: Evaluating the small-signal robustness

    In a previous Power House blog post , I introduced TI’s D-CAP+ multiphase regulator control topology and covered the basics of its architecture, steady-state operation and transient performance versus a competitor’s part. I also said something when listing some of the features of the D-CAP+ control topology that at first glance just seems...
    • Nov 14, 2017

    How to minimize undershoot when the pre-boost converter wakes up

    The start-stop system in hybrid electric vehicles (HEVs) helps reduce fuel consumption and emissions by stopping the engine during idling, but the battery voltage drops whenever the engine restarts. To provide the minimum required voltage to the loads during the battery voltage drop, pre-boost converters are widely used in automobiles. Table 1 shows...
    • Nov 13, 2017

    FPGA power made simple: sequencing

    I hope you enjoyed the last blog on rail requirements. Now we move on to sequencing, another important topic in field-programmable gate array (FPGA) power design. While powering the FPGA on and off, the power supplies need to turn on in a particular order. The exact sequencing series will vary, but typically the core rail is the first on and the first...
    • Nov 9, 2017

    Improve the user experience with an LED ring

    Products with good user experience can always receive positive feedback in the market. You can use audible, visual or tactile methods to improve the user experience for consumer electronics or smart home products like speakers, locks, smoke detectors...
    • Nov 8, 2017

    An introduction to the D-CAP+™ modulator and its real world performance

    The D-CAP+™ control architecture is optimized for multiphase regulators. Like the standard D-CAP™ control scheme, the D-CAP+ architecture is also a constant on-time architecture, but it’s implemented using a true current-mode design. This enables it to properly sense and balance inductor current between multiple phases of a switching...