The TPS25810 is a USB Type-C downstream facing port (DFP) controller that monitors the USB Type-C configuration channel (CC) lines to determine when a USB device is attached. When the upstream facing port (UFP) device Type C-to-B dongle is plugged in, the port supports connection of Type-B receptacle devices such as a mouse, smartphones, keyboards, external hard drives, and so forth. As these devices monitor the USB 2 data line (D+/D–), the TPS2544 USB charging port controller can be added to provide the electrical signatures on D+/D– to support BC1.2 and non-BC1.2 compliant charging schemes. This application note presents the design solution which offers fast charging of popular mobile phones, tablets, and media devices over the USB Type-C port.
Large-screen HDTVs are selling in huge volumes over last few years, primarily driven by amazing improvements in picture quality & form factor (thinner screens). The form factor constraints from having skinny screens result in tiny built-in speakers that are undersized, under-powered and are typically aimed at wrong direction. Hence sound bars have exploded in popularity as complementary audio system by providing a sound experience that more closely matches the TV’s life-like pictures. In addition, with release of HDMI 2.1 specification we finally have a no compromise audio solution for HDMI as part of the eARC [enhanced Audio Return Channel]. One of the most important functions the eARC enables is sending audio signal both “upstream” and “downstream” over a single connection. As a result, with eARC the full resolution sound signals can be passed back and forth between your TV and audio systems with ease and without compromising sound quality.
With vehicle electrification increasing and as fully electric vehicles become more mainstream, the number of electric motors and digital power control systems in automobiles are expanding. Many of these systems require high-speed current monitoring circuits to ensure proper operation and to protect against potentially damaging overcurrent conditions. One of the most effective ways to accomplish this function is to employ a low side current shunt monitoring circuit.
This application report documents different tools and methods that are useful while debugging issues with the video capture subsystem on the Jacinto6™ (DRA7xx) family of system-on-chip (SoC). This can be used as a diagnostic test to root cause most common failures in the video capture use cases.
Electromagnetic Interference (EMI) is an unwanted coupling of signals from one circuit or system to another. EMI is separated into two different categories: conducted and radiated. Conducted EMI is a form of conduction coupling caused by parasitic impedance, power and ground connections. Radiated EMI is the coupling of unwanted signals from radio transmission. This application note covers the EMI performance of several different techniques using both printed circuit board (PCB) layout changes and additional external circuitry using the LMZM23601 step-down power module. The PCB layouts in this experiment include the following: original LMZM23601 EVM, EVM with top layer shielding, perimeter fencing with vias, via stitching, and input/output via fencing. Two additional alternative techniques used to mitigate EMI noise are the high frequency(HF) bypass capacitor modification and an input filter design.
A recent trend has been seen in appliances (both large-home and small-home appliances) for moving from high-voltage (HV) motors to low-voltage (LV) motors for low power application (<100-W). This transition is due to availability of low power drivers which have the following advantages over high voltage systems.
Smart door locks have gained incredible momentum in the last few years. This is mainly because security, privacy and reliable connectivity have become ubiquitous bringing clear benefits with an easy use case model. Similar to smart thermostats, security cameras, and garage door openers, smart door locks bring added value to the users providing the ability to monitor the status of entry ways, as well as, selectively grant access to service providers. This application report covers some of the more common use cases for smart door locks and discusses tradeoffs between the approaches.
A common need of any system is controlling multiple devices through digital logic. Systems continue to move to lower voltage nodes for power savings. With this trend, using devices that are not natively compatible with the control logic of the system can lead to extra system costs through board size and BOM count. Also, the use of more components in the design of the system creates more opportunities for power sequencing issues. Using devices that have integrated support for the control logic of the system achieves a cost effective solution.
This application report discusses how linear Hall effect sensors can be used to measure 2D angles, including both limited-angle and 360° rotation measurements. This report provides details on some calibrated and uncalibrated implementations to help meet angle measurement accuracy requirements. This report also covers the number of sensors needed, and the preferred magnet types for each method.
Residential smart meters are used for billing of electricity, gas, water, and heat. The technological advancements in these smart meters are being driven by the demand from utility companies to create a smarter and more efficient grid aimed at reducing non-revenue losses. More sensors are being added to collect more data about the status of the grid including pressure, temperature, etc. There is also a growing trend to incorporate higher precision measurements with newer technologies, such as ultrasonic flow measurements, which often end up adding to the overall complexity, reliability, and power consumption. These meters are also often part of radio-frequency (RF) communication networks that can draw a variable amount of power from the system depending on the required output power of their signal.