Technical solutions, industry trends and insights for designing and managing power supplies.
    • Jul 16, 2018

    Key considerations for designing with the new PoE standard

    The Institute of Electrical and Electronics Engineers (IEEE) 802.3bt standard will publish in September 2018 and enable Power over Ethernet (PoE) applications up to 90W/71.3W (sent/received) such as LED connected lighting ballasts and digital signage. With the new standard fast approaching, many electronic system designers need to quickly familiarize...
    • Jul 5, 2018

    A review of EMI standards, part 2 – radiated emissions

    Radiated electromagnetic interference (EMI) from switching power supplies is dynamic and situational problem that relates to circuit board layout, component placement and parasitic effects within the power supply itself, as well as the overall system...
    • Jun 28, 2018

    A review of EMI standards, part 1 – conducted emissions

    In general, electrical products must meet some type of electromagnetic interference (EMI) performance metric, whether established in the product’s design specifications or to comply with regulatory requirements. It’s important to take int...
    • Jun 26, 2018

    The sound of GaN

    High-fidelity (hi-fi) audio is becoming more and more popular among music fans and movie buffs, from portable speakers to high-end, in-home audio to automotive systems. And from the A to Z of classifications for audio power amplifiers, Class-D amplif...
    • Jun 23, 2018

    FPGA power design challenges: Can I use a PMIC for that?

    System designers gain three benefits when designing systems with a field-programmable gate array (FPGA): reprogrammability, performance scalability and fast time to market. But there are also challenges that designers must overcome. In this post, I w...
    • Jun 20, 2018

    LDO Basics: Quiescent Current 101

    How aggravating is it to pick up an electronic device that you’ve barely used, only to find that the battery is nearly or completely dead? If your device was just on standby or asleep, this may have happened because of a small but crucial speci...
    • Jun 8, 2018

    Understanding valley current limit

    The concept of current limit seems pretty straightforward: when you increase the output current of a DC/DC converter, at a certain point it’s not possible to increase it any further. This level is the current limit, which naturally leads to the idea that the current is limited at some particular peak or maximum level. With this in mind, the...
    • Jun 6, 2018

    The new PoE standard: It’s almost here

    This July will mark six years since the beginning of the journey for IEEE 802.3bt, the IEEE standards project that will standardize 4-pair Power over Ethernet (PoE). I began preparing for the standard when I attended my first IEEE standards meeting ...
    • May 30, 2018

    How to achieve higher system robustness in DC drives, part 2: interlock and deadtime

    While commuting to work, waiting for a traffic light I noticed the green and red light sequence that prevents traffic flow conflicts, or crashes. The crossing traffic directions are out of sequence to ensure safe driving. Also the yellow gives a litt...
    • May 29, 2018

    Why you need a programmable lighting engine when designing LED driver circuit

    Advanced light-emitting diode (LED) animation effects like “deep breathing” and “color chasing” are becoming increasingly popular. However, a common issue designers’ face is that the microcontroller (MCU) is overloaded b...