Technical solutions, industry trends and insights for designing and managing power supplies.
    • Jul 27, 2017

    A smart solution to sequence and monitor multiple power rails in a system

    Electronic systems that include a central processing unit (CPU), digital signal processor (DSP), microcontroller (MCU), field-programmable gate array (FPGA) or application-specific integrated circuit (ASIC) can have multiple voltage rails and require certain power on/off sequences in order to function correctly. TI’s UCD9090A power-supply sequencer...
    • Jul 26, 2017

    Display Power: Why TFT LCD needs Temperature Compensation

    If you ever had the pleasure to design the bias supply for a Thin Film Transistor Liquid Crystal Display (TFTLCD) module and you used the appropriate part from TI then you may have run into the temperature compensation function. This blog will handle the background on why a Liquid Crystal Display (LCD) needs temperature compensation and how it is implemented...
    • Jul 25, 2017

    LDO basics: noise – part 2

    In my last blog, LDO basics: noise – part 1 , I discussed how to lower output noise and control the slew rate by using a capacitor in parallel with the reference voltage (C NR/SS ). In this post, I’d like to discuss another method to lower output noise: using a feed-forward capacitor (C FF ). What is a feed-forward capacitor? A feed...
    • Jul 24, 2017

    The story behind "Fundamentals of Power Supply Design"

    I joined Texas Instruments in July 2003, working in marketing for power management. During my first week on the job, my boss introduced me to Bob Mammano like this: “Tim, I’d like to introduce you to Bob Mammano, the inventor of the first integrated circuit [IC] designed for switch-mode power-supply control.” Bob was managing TI’s...
    • Jul 20, 2017

    How to approach a power-supply design – part 3

    In the second installment of this blog series, I discussed how to choose the best-fitting topology from the parameters of your power-supply specification. In this third installment, I’ll describe different in-depth aspects for buck, boost and buck-boost topologies. Buck converters Figure 1 shows the schematic of a nonsynchronous buck converter...
    • Jul 18, 2017

    Transform the way you charge your devices with USB Type-C and PD

    Nowadays, we see more and more electronics with USB Type-C™ and USB Power Delivery (PD) ports on the market. They range from cellphones, laptops and power banks to drones, power tools, and smart home and portable applications. The USB...
    • Jul 6, 2017

    Help! My power supply unit is unstable – part 1

    I’ve heard that there are at least seven reasons to eat, and only one of those reasons is hunger. In the same way, there are many reasons for switched-mode power supply (SMPS) instability, and only one of those reasons is a control loop with an insufficient gain or phase margin. In this six-part series, I will offer some tips about identifying...
    • Jun 29, 2017

    Synchronous buck controller solutions support wide VIN performance and flexibility

    At the epicenter of most power converter implementations is the inevitable trade-off of efficiency and power density . However, new applications are coming to fruition that have unique power solution requirements. Many designers are choosing to capita...
    • Jun 28, 2017

    Making smart meter eFuses robust and reliable

    Replacing existing meters (which still use technology developed decades ago), smart meters use a secure connection network to automatically and wirelessly send energy usage to utility companies. The heart of a smart meter is its switch-mode power supply (SMPS) using the low-cost flyback topology for both single- and three-phase smart meters. The...
    • Jun 26, 2017

    Shared bike locks charged by solar power

    In large cities, the concept of “shared bikes” started several years ago. Anyone can rent a bike and return it to various docking stations throughout the city with a credit card. The rider is charged for the length of time tha...