Technical solutions, industry trends and insights for designing and managing power supplies.
    • Dec 18, 2014

    Ins and Outs of Power Sequencing for FPGAs

    A field programmable gate array (FPGA) requires anywhere from 3 to10 power rails, or more. It is important to implement power-supply sequencing upon startup to avoid drawing excessive current which could damage devices. FPGA vendors will provide the ...
    • Dec 16, 2014

    Damping input bead resonance to prevent oscillations

    A traditional approach to damping input filter resonances has been to add another capacitor of at least three times the capacitance of the original input capacitor with a resistor in series for damping. See AN-2162 (page 6) by Alan Martin who advocates added capacitance to be at least four times input capacitance based upon SNVA538 by Michele Sclocchi...
    • Dec 14, 2014

    Digital power chat recap: Real-world digital power applications and benefits

    Continuously searching for a way to improve your power supply in applications? The Planet Analog Digital Power chat session on Nov. 19 explored power management and control questions to help with common design issues. Lead by TI experts Zhen Yu, syst...
    • Dec 9, 2014

    Powering Bipolar Rails with Wide-VIN Fly-Buck Converter

    I’m often asked by power system design engineers, how do you provide bipolar (positive and negative) voltage rails while keeping cost and complexity to a minimum? And at the same time, how should one deal with a variety of challenges―from galva...
    • Dec 9, 2014

    Dynamic Voltage Scaling - Improve System Efficiency and Thermal Performance

    The expression for power dissipation in a processor is P f*V2. As system clock frequencies climb ever higher, nearing a state known as overclocking, efficiency is compromised and heat becomes a designer’s primary concern. Excess heat from...
    • Dec 3, 2014

    Noise beads on inputs to DC/DC converters can create instability and oscillations

    Engineers often add noise suppression beads with the source power to keep high frequency noise out of the input source. The beads are advertised as having 10 to 100 ohms (typically) at 10 or 100 MHz. When I first heard about them I thought resistors – they will if anything make the power supply more stable . However, after contrasting the low...
    • Nov 21, 2014

    Make your Smart Meter Smarter

    Smart meters are pretty cool. You can track your usage of water, gas, or electricity by the day or even the hour. And if your water, gas, or electric service is disrupted, the smart meter is kind enough to automatically report this outag...
    • Nov 20, 2014

    PowerTips: Construct a low cost bridgeless PFC with an analog controller – Part I

    In PC and server applications, one might choose bridgeless power factor correction circuit (PFC) , such as the one shown in Figure 1, to meet the 80 Plus Platinum or Titanium requirement. Figure 1. Power stages of bridgeless PFC circuit. When compared to the traditional boost PFC in Figure 2, the bridgeless PFC eliminates the bridge rectifier...
    • Nov 18, 2014

    Reducing high-speed signal chain power supply issues

    Have you ever come across a lack of performance in the signal chain only to realize the issue was originating in the power supply? In this blog, I will describe some of the issues encountered in the signal chain due to the power supply and how to resolve them. A high-speed signal-chain design can have the following two elements: 1) a receive path...
    • Nov 15, 2014

    Smart Thermostats Connect to the IoT, Enabled by Power Management

    What do you like most about the smart thermostat in your home or office? Or, if you don’t have one yet, what do you dream of finding in a new thermostat? Is it the display that is big enough to read? Do you most value the ability to control it from your phone? What about its reliability—will you ever have to replace the battery in it? ...