Design guide app note from Alpha & Omega Semiconductor on USB 3.0 protection. Link here (PDF) USB 3.0 is an enhanced version of the USB 2.0, with up to 5Gbps data rate. USB 3.0 has 10 times the performance over USB 2.0. Legacy device continue to work when plugged into new host connector albeit at […]
Tag Archives: app note
App note: Direct current ammeters
App note from Murata about digital ammeter and things to consider implementing them. Link here (PDF) There is a trend to replace older, analog-style readouts with modern digital displays. As one might expect, the conversion is not always a trivial task. This is especially true when the conversion involves older, moving-vane (“pointer” style) analog ammeters. […]
App note: Some thoughts on DC/DC converters
Basis App note of modern DC/DC converters from Analog Devices. Link here (PDF) Many systems require that the primary source of DC power be converted to other voltages. Battery driven circuitry is an obvious candidate. The 6V or 12V cell in a laptop computer must be converted to different potentials needed for memory, disc drives, […]
App note: The Alexander Current-Feedback audio power amplifier
An old App note for audio enthusiast from Analog Devices about Current-Feedback approach in audio power amps its designs and history by Mark Alexander. Link here (PDF) The subject of power amplifier design is one of those controversial areas of audio engineering that continues to receive intense debate, despite the fact that there are literally […]
App note: Understanding dual terminator resistor networks
App note from Vishay about the dual terminator resistor network and how to check its internal resistor values. Link here (PDF) One of the least understood resistor network schematics in the industry today is the dual-resistor terminator schematic shown in the 8-pin SIP and in the 16-pin DIP configuration. This schematic shows up in both […]
App note: Phase noise measurement guide for oscillators
App note from SiTime about phase noise, its fundamental and going to actual measurements. Link here Phase noise is one of the fundamental metrics for oscillators. An experienced engineer can tell a lot about the quality of an oscillator and whether it fits the application by looking at the phase noise plot. RF engineers focus […]
App note: Transmission-line effects influence high-speed CMOS
Old app note from ONSEMI but still a good reference when designing with high speed CMOS devices. Link here (PDF) Unlike low-power, metal-gate CMOS, high-speed 54HC/74HC devices readily drive long cable runs and backplanes. While the family maintains CMOS’s traditional noise immunity, you must watch transmission-line effects in such applications.
App note: Reading onsemi IGBT datasheets
Helpful app note from ONSEMI that will guide you to their IGBT parameters. Link here (PDF) The Insulated Gate Bipolar Transistor is a power switch well suited for high power applications such as motor control, UPS and solar inverters, and induction heating. If the application requirements are well understood, the correct IGBT can easily be […]
App note: High-side smartFETs with analog current sense
App note from ONSEMI about their high side SmartFETs and their specific application. Link here (PDF) The “end requirement” from a high side SmartFET is to switch loads, and there are different alternatives, available in market, towards that end. Relays, for instance, have been used for long in the industry to switch various automotive loads, […]
App note: SEPIC converter analysis and design
Wide input voltage is a specialty of this type of DC-DC converter, here’s an app note from ON Semiconductors on SEPIC converters. Link here (PDF) The single−ended primary−inductor converter (SEPIC) is a type of DC/DC converter that allows the electrical potential (voltage) at its output to be greater than, less than, or equal to that […]
App note: Method of suppressing increase in surface temperature of shunt resistors
App note from ROHM Semiconductor about their shunt resistor mounting designs to keep heat away. Link here (PDF) Shunt resistors are widely used for current sensing in automotive and industrial applications. In the automotive sector, as vehicles become more complex and the number of motors and ECUs grows, applications need to be configured in a […]
App note: Effect of PCB design on temperature coefficient of resistance
App note from ROHM Semiconductor on the importance of sense trace/line arrangement on PCB designs. Link here (PDF) While resistance, power rating and size are important considerations when using shunt resistors, tolerances that affect the accuracy of the detected voltage must also be considered. These tolerances include the temperature coefficient of resistance and the tolerance […]
App note: Types of capacitors used for output smoothing of switching regulators and their precautions
Another app note from ROHM Semiconductor on various capacitors used for output smoothing. Link here (PDF) In recent years, it has become a common practice to recommend multilayer ceramic capacitors for the output smoothing of switching regulators due to the stability of their temperature characteristics and the reduction on the mounting area. On the other […]
App note: 5kW High-Efficiency Fan-less inverter
A novel inverter design by ROHM and Power assist technology. Link here (PDF) We employ trans-linked interleaved circuits as inverter circuits that utilize the high frequency switching performance of silicon carbide (SiC) MOSFET, achieving a power conversion efficiency of 99% or more at 5 kW. Since this circuit topology allows a reduction in the inductance […]
App note: Criteria for selecting connectors for LED lighting/industrial apps
App note from AVX covering ideal connectors used on industrial applications. Link here (PDF) Connectors used in industrial and solid-state lighting applications pose uniquely challenging design constraints on power density and form-factor while simultaneously demanding the highest reliability under harsh environmental conditions. As a designer in these spaces, one cannot simply prioritize piece cost in […]
App note: Energy storage capacitor technology comparison and selection
App note from AVX about MLCC, Tantalum, Tantalum Polymer and Supercapacitors. Link here (PDF) Tantalum, MLCC, and super capacitor technologies are ideal for many energy storage applications because of their high capacitance capability. These capacitors have drastically different electrical and environmental responses that are sometimes not explicit on datasheets or requires additional knowledge of the […]
App note: How to Port U8g2 to LPC55(S)6x and support a mono OLED display
App note from NXP Semiconductors helping you to use cheap OLED panels found on Taobao or Amazon to interface with their LPC5500 series micro using U8g2 graphics library. Link here (PDF) The LPC5500 is an Arm® Cortex®-M33 based microcontroller for embedded applications. There are many 128 × 64 resolution OLED panel modules on the market […]
App note: Driving brushless long-life vibration motors
App note from Precision Microdrives on new brushless motor design and how to drive them efficiently. Link here For a long time, all motors driven by DC supplies relied on using metal or carbon brushes to provide electrical power to the motor’s internal components. Meanwhile, in larger motor designs it has also been possible for […]
App note: Using SPICE To model DC motors
App note from Precision Microdrives helping you model DC motors in SPICE. Link here SPICE (Simulation Program with Integrated Circuit Emphasis) is an open-source program for simulating electrical circuits. It enables engineers to model the behaviour of their circuits in software, which reduces prototyping costs and time. As DC motors have mechanical properties – i.e. […]
App note: High-side current sensing for applications using high common-mode voltage
App note from STMicroelectronics. Link here (PDF) This application note explains how to extend the common input voltage range of a standard operational amplifier (op amp) to realize a high-side current sensing.