Technical solutions, industry trends and insights for designing and managing power supplies.
    • Sep 17, 2018

    How to add overvoltage protection to a synchronous boost controller

    Although a cycle-by-cycle current-limit function exists in most synchronous boost controllers, sometimes engineers will add output overvoltage protection (OVP) in case of emergency to protect discrete circuits. In this blog post, I’ll show you ...
    • Aug 28, 2018

    Use a low-quiescent-current switcher for high-voltage conversion

    In battery-operated environments, it’s important to pay attention to quiescent current when designing your power system block diagram. Some applications, such as cordless handheld garden tools, lighting controls and cordless lawnmowers , have lo...
    • Aug 24, 2018

    Choosing the right flyback controller for your design

    If every industry has one common goal, it’s the push to do more with less. How do you make something lighter, smaller, faster and stronger? Power is no exception. With the ever-increasing demand for smaller power supplies to do more, designers ...
    • Aug 21, 2018

    How LILO LDOs increase system efficiency

    High efficiency for power supplies has historically been attributed to switching controllers or converters, whereas designers assume that linear regulators (LDOs) have bad efficiency. But linear regulator topologies have changed to where single n-ch...
    • Aug 13, 2018

    Dimming in switched-mode LED drivers

    One of the key concerns in light-emitting diode (LED) driver designs is the dimming performance. Most designers use one of two methods: analog dimming or digital pulse-width modulation (PWM) dimming. There are two ways to implement digital PWM dimming: an enabling on/off approach or a shunt-field effect transistor (FET) approach. In both implementations...
    • Aug 8, 2018

    When it comes to power process technologies, one size does not fit all

    Power electronic system and circuit designers have more choices in power process technologies. Silicon-based devices continue to evolve, but there is also an increasing option to use wide-bandgap material technologies such as gallium nitride (GaN) ...
    • Aug 1, 2018

    LDO basics: capacitor vs. capacitance

    Low-dropout regulators (LDOs) provide power in all types of applications. But for an LDO to operate normally, you need an output capacitor. A common issue when designing LDOs into an application is selecting the correct output capacitor. In this post, I will explore different considerations when selecting an output capacitor and how it may affect your...
    • Jul 25, 2018

    LDO Basics: Preventing reverse current

    In most low-dropout regulators (LDOs), current flow is like one-way street – go in the wrong direction and major problems can occur! Reverse current is current that flows from VOUT to VIN instead of from VIN to VOUT. This current usually traver...
    • 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 signag...
    • 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...