Technical solutions, industry trends and insights for designing and managing power supplies.
    • Jan 24, 2015

    Measuring PSR in an ADC

    In order to avoid power-supply noise compromising signal integrity in a signal-chain analog-to-digital converter (ADC), it is important to measure the power-supply rejection (PSR) of the ADC. This blog post will focus on explaining the techniq...
    • Jan 23, 2015

    Power Tips: Don’t let your power supply layout ruin your day!

    Have you designed a power supply only to find out later that your layout was inefficient? Follow these key tips to create a power supply layout and avoid the stress of debugging. 1. Layout of the power supply is crucial to the success of the design. Many times I have spent hours and sometimes days in the lab trying to figure out a noise issue...
    • Jan 21, 2015

    It is not just a PFC controller, it is also a power meter

    Real-time energy consumption measurement, including input real power, input RMS voltage and input RMS current measurement for off-line power supplies, is becoming more important nowadays. These measurements could be used to adjust power delivery and ...
    • Jan 19, 2015

    Which is simpler, selecting a Hot-Swap controller or its power MOSFET?

    I had company over to the house during the holidays and had to run to the store to pick up a few last minute items. Then I realized how many meanings there are for the three-lettered word “run”. I heard there are 645 meanings ...
    • Jan 13, 2015

    BOM-optimize your vacuum cleaner!

    In the consumer world with products, such as vacuum cleaners and white goods , the Bill of Materials (BOM) is extremely important. The broad array of products and companies designing those products create great competition—pressuring pro...
    • Jan 10, 2015

    Watt’s wrong with my LDO?

    Choosing something as simple as a linear regulator is often a lesson in thermal dynamics. The designer usually realizes their error after the design is on the bench. Or worse, the design fails in the field because a regulator is running beyond its temperature rating. With all the new features and specifications of new linear regulators, it is easy to...
    • Jan 8, 2015

    Power Tips: Construct a low cost bridgeless PFC with an analog controller – Part II

    In my last blog , I introduce semi-bridgeless PFC with standard PFC controller as a candidate of low cost, high efficiency PFC. This blog focus on key design considerations of semi-bridgeless PFC with an analog transition mode PFC controller. A stand...
    • Jan 6, 2015

    Start/Stop and Cold Crank Applications

    Written By: Martin Moss and Xiang Fang The heavy use of cars in high populated areas has cities looking into alternative transportation such as trains, buses or e-bikes. To keep up with environmental regulations and concerns, the automotive in...
    • Dec 27, 2014

    Power Tips: How to Maximize Efficiency in PoE and Telecom Supplies

    In Power-over-Ethernet (PoE) applications, high efficiency is a primary concern because input power is limited. Low-power systems are limited to 13W, while high-power systems are limited to 25.5 W. Telecom supplies which typically r...
    • Dec 23, 2014

    What’s next for PoE? IEEE802.3bt: November Plenary Session Recap

    The IEEE802.3bt Task Force met in San Antonio, Texas a few weeks ago to continue work on the new standard for 4-pair Power over Ethernet (4PPoE).  While the weather in San Antonio left a lot to be desired (torrential downpours), it really didn&r...