• The value of a thin, isolated power solution

    Other Parts Discussed in Post: UCC12051-Q1

    Faced with shrinking space constraints and increased robustness requirements, industrial and automotive power-supply designers must carefully choose the best power design topologies to meet their application needs. Isolated choices include modules as well as discrete and integrated solutions; each has its own trade-offs. Modules are encapsulated solutions with common input/output…

  • What’s not in the power MOSFET data sheet, part 1: temperature dependency

    Other Parts Discussed in Post: CSD17576Q5B, CSD19532Q5B, TEST

    Power metal-oxide semiconductor field-effect transistor (MOSFET) data sheets provide useful information such as key specifications, ratings and characteristics to help you confirm that the device will operate as intended. You may have questions about how a parameter varies, however, so in this article I’ll explain not just what’s in the data sheet but more importantly…

  • 3 ways to reduce power-supply noise with power modules

    Other Parts Discussed in Post: TEST

    Noise is an unwelcomed electrical phenomenon that commonly originates in the power supply. If not reduced, noise can adversely impact the performance of applications in sensitive medical, test and measurement, and aerospace and defense systems.

    Today’s high-precision analog signal-chain systems require DC/DC switching regulators to generate regulated power-supply rails for powering analog…

  • Enhance thermal management in EVs with autonomous cell balancing

    Other Parts Discussed in Post: BQ79616-Q1

    Cell balancing is important in battery management systems for electric vehicles (EVs) because it helps extend vehicle driving ranges and ensure safe EV battery operation. Cell balancing is also required in order to correct imbalances in the battery itself. All batteries, including those found in EVs, experience unbalancing over time caused by mismatches during manufacturing processes…

  • How to choose your Type 3 (<51-W) PoE power topology

    Other Parts Discussed in Post: TPS23730

    Designers have several topologies to choose from when designing 51-W isolated DC/DC power over Ethernet (PoE) systems. In a perfect world, each topology would cost nothing, have 100% efficiency and be smaller than a grain of sand. But since that isn’t possible, system designers are forced to choose the topology that closest meets their needs. In this article, I’ll discuss three…

  • Conserve battery power in HEV/EVs with automatic host reverse wakeup

    Other Parts Discussed in Post: BQ79600-Q1, BQ79616-Q1

    As more vehicles become electrified, the need to achieve the highest levels of functional safety with high-accuracy battery monitoring is paramount. Yet in order to improve battery-monitoring accuracy, the vehicle’s battery management system must work efficiently in real time to monitor the performance of the individual battery cells within.

    In typical hybrid…

  • Automotive GaN FETs engineered for high frequency and robustness in HEV/EVs

    Intent on accelerating electric vehicle (EV) adoption by addressing top consumer concerns such as driving range, charge time and affordability, automakers worldwide are demanding increased battery capacity and faster charging capability, with little to no increase in size, weight or component cost.

    The EV onboard charger (OBC), which allows consumers to recharge the battery directly from an AC main at home or at public…

  • Powering medical imaging applications with DC/DC buck converters

    Other Parts Discussed in Post: LMQ61460, LMZ34002

    From cart-based ultrasound scanners to portable smart probes that send images directly to a smartphone, the world of ultrasound imaging continues to diversify. Despite architectural differences in their design, every ultrasound system needs a DC power supply that can efficiently meet the power demands of the system and avoid interference with the ultrasound frequency range…

  • How GaN FETs with integrated drivers and self-protection will enable the next generation of industrial power designs

    Other Parts Discussed in Post: LMG3425R030, LMG3422R030, LMG3422R050, LMG3425R050

    Physics has caught up with silicon devices. The traditional workhorses of power supplies – metal-oxide semiconductor field-effect transistors (MOSFETs) and insulated gate bipolar transistors (IGBTs) – can only boost power density if you sacrifice efficiency, form factor and heat dissipation.

    Enter gallium nitride (GaN) semiconductors…

  • Adding USB Type-C® with USB Power Delivery to battery-powered applications

    Other Parts Discussed in Post: TPS25750, BQ25792, TPS25750D, BQ25731

    Upal Patel co-authored this article.

    A USB Type-C® port with USB Power Delivery (PD) is becoming the standard port for charging single- and multicell battery-powered devices. Applications such as wireless speakers, power banks and power tools have been transitioning from proprietary charging ports, legacy USB ports and barrel-jack ports to a standardized…

  • Minimize noise and ripple with a low-noise buck converter

    Other Parts Discussed in Post: TEST, TPS62913, TPS62912

    Minimizing noise is a common challenge for engineers designing a power supply for noise-sensitive systems for test and measurement and radio applications, such as clocks, data converters or amplifiers. Although the term “noise” can mean different things to different people, in this article I’ll define noise as low-frequency thermal noise generated by resistors and…

  • The impact of an isolated gate driver’s input stage for motor-drive applications

    Other Parts Discussed in Post: UCC23514, UCC5310, UCC5320, UCC5350, UCC5390

    You have many options when selecting an isolated gate driver for the power stage in motor-drive applications. Gate drivers can be simple or complex, with features such as an integrated Miller clamp, split outputs or an undervoltage (UVLO) lockout reference to the emitter of an insulated gate bipolar transistor (IGBT).

    There are two options for…

  • eFuses in factory automation: all-in-one system power protection

    “All-in-one” sounds so nice, doesn’t it? Nothing encompasses the idea of all-in-one more than the Swiss Army knife, which was first introduced to the world back in 1891 and has become something of a legend given its versatility, small size and low cost. This one tool can help solve a variety of daily challenges and is small enough to fit in your pocket. What more could you ask for?

    Now picture a factory…

  • 5 best practices to extend battery life in flow meters

    Other Parts Discussed in Post: TPS63900

    Flow meters use lithium manganese dioxide (LiMnO2) and lithium thionyl chloride (LiSOCl2) batteries as energy sources. LiSOCl2 batteries are popular in flow meters because they provide better energy density and a more efficient cost-per-wattage ratio than LiMnO2 batteries. However, LiSOCI2 batteries have a poor impulse response, which can lead to a large drop in voltage during transient…

  • Introduction to the fundamental technologies of power density

    The importance and value of power density in modern power-delivery solutions cannot be overstated.

    To better understand the fundamental technologies of high-power-density designs, in this article I’ll examine the four most important aspects of high-power-density solutions:

    • Reduced loss generation.
    • Optimal topology and control selection.
    • Effective heat removal.
    • Reducing system volume through mechanical and electrical…
  • Benefits of rechargeable batteries in real-time location system trackers

    Other Parts Discussed in Post: BQ24040, BQ21061, BQ25619, BQ25155

    Real-time location systems (RTLS) enhance the lives of consumers and businesses by making everyday routines smarter through accurate, location tracking technology such as GPS and Bluetooth® Low Energy. RTLS trackers eliminate the stress of losing belongings such as luggage or pets using long-distance GPS tracking. RTLS trackers also enhance businesses with…

  • Meet airline restrictions with power-path control for dual batteries

    Other Parts Discussed in Post: LM74700-Q1

    With the Federal Aviation Administration restricting the size of batteries allowed on airplanes, it can be challenging to design applications with batteries down to 100 Wh. Some companies design applications using two small batteries instead of one to meet the regulations, but having two batteries often requires the implementation of redundant or duplicate power supplies, which…

  • Overcoming challenges for backlight LED drivers in automotive display solutions

    Other Parts Discussed in Post: LP8866-Q1

    High resolution and seamless operation are important for larger automotive display screens, shown in Figure 1, as consumers want a clear picture with smooth functionality. Given the harsh environments in vehicles, system reliability and safety are also concerns. As a result, it’s a challenge for designers to find a backlight LED solution that’s designed for larger screens while…

  • Simplifying radiation-hardened power-supply design with eFuses

    Today’s satellites use complex, high-power field-programmable gate arrays (FPGAs) and processors, challenging power-supply design engineers to create robust power supplies. Many designers end up with complicated designs meant to achieve redundancy (the duplication of critical components to increase reliability), involving dozens of discrete components like field-effect transistors (FETs) to continuously monitor and enable…

  • Ease power-supply design for USB PD applications with buck-boost converters

    Other Parts Discussed in Post: TPS55288, TEST

    USB technology has evolved – from a data interface capable of supplying limited power to a primary power source with an interactive data interface. Today, many devices charge or get their power from USB ports contained in laptops, cars, aircrafts or even wall sockets.

    Because of its compact size and ability to both deliver power and transfer data, USB Power Delivery …

  • Maximize power density with buck-boost charging and USB Type C™︎ Power Delivery

    Other Parts Discussed in Post: BQ25790, BQ25798

    The buck-boost charger has become increasingly popular in recent years given its ability to charge a battery from nearly any input source, regardless of whether the input voltage is higher or lower than the battery voltage.

    One critical benefit of the widespread adoption of USB Type-C is a realistic path to a universal adapter and corresponding e-waste reduction. Although…

  • Universal and fast charging – a future trend for battery-powered applications

    Other Parts Discussed in Post: BQ25790, BQ25792

    Today’s “always-on” consumer wants to charge their portable electronics wherever they are. For example, it’s common to see travelers charging their cellphones, laptops and headphones while waiting to board a flight or hop on a train. But when there are different charging methods for each device, these consumers must carry different adapters, and it can become quite a hassle…

  • 5 questions to ask when designing with rechargeable batteries for personal care products

    Other Parts Discussed in Post: BQ25306

    Beauty and personal care products have traditionally been designed with a traditional AC power supply. Therefore, every time consumers use such products, they need to be close to the wall, and any movement and power is restrained by the length of the electrical cord. As modern electronics have evolved, consumers now expect to be able to use personal care products such as a shavers…

  • What type of ESD protection does your MOSFET include?

    Power metal-oxide semiconductor field-effect transistors (MOSFETs) use a thin oxide to isolate the gate electrode from the active area of the transistor. Much like the MOSFET structures used in the fabrication of microprocessors, a power MOSFET gate oxide is just as susceptible to damage from electrostatic discharge (ESD) as its tinier counterparts. ESD may cause catastrophic failure (such as gate-oxide breakdown) or…

  • Understanding and managing buck regulator output ripple

    Dan Tooth co-authored this technical article

    Your new design needs to fit twice as much into half the space and cost nothing – sound familiar? You selected the smallest point-of-load regulator and generated the tightest layout you could with the most cost-effective passive components. So far so good. But then you look at the output ripple on your critical rails and it’s not what you expected. What’s going on?…