App note: The benefit of using a three sense pin design on battery

App note from Vishay about correcting error when reading current on small valued shunt resistor using third pin. Link here (PDF) The low values of battery shunts being produced today necessitate the use of precision analog to digital converters (ADCs) to interpret the voltage drop across the shunt’s element. Many of these precision ADCs require […]

App note: Bad block information introduction

App note from Macronix all about NAND flash bad blocks management. Link here (PDF) Today, NAND flash is used in many fields, such as consumer, industrial, and automotive. Compared with NOR flash, NAND flash has the advantage of availability at higher densities and lower cost per bit. However, NAND flash has the disadvantage of requiring […]

App note: Enhancing system security with Macronix(TM) flash

Technical note from Macronix about built-in and hardware security strategies on their flash memories. Link here (PDF) Attacks on a system typically alter or copy the content of the Flash image for three primary reasons, which are to: operate the system in an unauthorized manner with the purpose of committing fraud against the user or […]

App note: A sensible 30A energy meter

Technical paper from Analog Devices about wide range energy meter LTC2947 that eliminates the need for unique and expensive sense resistor values. Link here (PDF) Monitoring energy has similar benefits in many applications, not just solar. Handheld, rack-mounted and in-line energy meters are widely available and can be used by people such as facility managers […]

App note: Achieving a stable power supply with fast transient response through digital control

Technical white paper from Renesas on using digital control loop to achieve more stable power supply. Link here (PDF) New trends and changing requirements in the power management industry influence how we design power supplies. Some, like the need for telemetry and system information, are more recent due to advancements in technology. Others, like the […]

App note: Monitoring additional supplies with the ADM1062–ADM1069 super sequencers

App note from Analog Devices about ways to extend capabilities of their ADM106x supply supervisor and sequencer chip. Link here (PDF) The ADM1062–ADM1069 Super Sequencers accurately monitor a number of input rails. The ADM1062–ADM1067 have 10 input pins dedicated to monitoring (VH, VP1 to VP4, VX1 to VX5) and the ADM1068 and ADM1069 have eight […]

App note: Failure signature of electrical overstress on power MOSFETs

Nexperia app note about MOSFET’s destruction investigative hints that can be used for design improvements. Link here (PDF) When Power MOSFETs fail, there is often extensive damage. Examination of the size and location of the burn mark, the failure signature, provides information about the type of fault condition which caused the failure. This document provides […]

App note: Designing in MOSFETs for safe and reliable gate-drive operation

This app note from Nexperia discuss’ gate drive designs for safe operation of MOSFET. link here (PDF) The MOSFET gate-source threshold voltage (VGS-th) and maximum gate-source voltage (VGS-max) are key parameters that are critical to the reliable operation of MOSFETs. The threshold voltage represents the voltage at which the MOSFET starts to turn on, whilst […]

App note: How to protect mobile devices from ‘USB Kill’ threats

Great read from Bourns about USB killer devices and port protection solutions. Link here (PDF) Researchers have long warned about the security risks of inserting other users’ USB drives into your PC, even those from whom you trust. If the threat of malware infections isn’t cause enough for concern, there have been stories of malicious […]

App note: Protecting USB Type-C Cable connectors featuring higher power & tighter pin spacing

Bourns’ built-in thermal cut-off devices adds extra protection from faults directly on USB Type-C cables. Link here (PDF) The now ubiquitous Universal Serial Bus (USB) standard was initially developed in 1994 with the intent of providing a communication standard to improve and simplify communication between the PC and peripheral devices. An updated version of the […]

App note: Offline non-isolated flyback converter protection

A white paper from Bourns about thermal protection PTCs on flyback converters. Link here (PDF) This paper examines the use of resettable polymer fuses for protecting offline flyback converters. Using a thermal model of the resettable fuse surrounding solder pads and copper to optimize the trip time so that the converter is protected during overloads, […]

App note: Layout recommendations for PCBs using a magnetometer sensor

Another app note from NXP on PCB design guidelines when using magnetic sensitive sensors. Link here (PDF) Unlike accelerometer, pressure, and gyroscope MEMS sensors, which use mechanical sensing elements unaffected by electromagnetic components on the PCB, magnetometers are sensitive to the magnetic fields generated by other circuit components. The most common magnetic field sources are: […]

App note: Implement high-speed RS-485 application with i.MX RT based on NXP SDK

App note from NXP link here (PDF) This application note describes how to implement RS-485 communication with NXP i.MX RT series EVK, and how to design software based on NXP MCUXpresso SDK. For high-speed RS-485 bus, normally the baud rate is up to 5 Mbps; the interrupt and software polling mode is not practical in […]

App note: Battery Fuel Gauging LSI [Smart LiB Gauge] for 1-Cell Lithium-ion/Polymer with LC709204F

App note from ON Semiconductor on their Smart Fuel gauge LC709204F. Link here (PDF) LC709204F is a Fuel Gauge for 1−Cell Lithium−ion/ Polymer batteries. It is a part of our Smart LiB Gauge family of Fuel Gauges which measure the battery RSOC (Relative State Of Charge) using its unique algorithm called HG−CVR2. The HG−CVR2 algorithm […]

App note: Assembly guidelines for QFN (quad flat no-lead) and SON (small outline no-lead) packages

NXP’s app note about the internals and how to’s footprint design and solder their leadless dual and quad flat packages. Link here (PDF) The small outline no-lead (SON)/quad flat no-lead (QFN) is a small size, lead-less plastic package with a low profile, moderate thermal dissipation, and good electrical performance. It is a surface mount package […]

APP NOTE: make an analog to digital converter using FPGA pins

A differential pin pair can be used as a comparator to create a basic ADC. This app note shows how to design a low speed (1 KHz) and “high” speed (50 Khz) ADC technique using only FPGA pins, a resistor and a capacitor. Regardless of whether we ever use this technique, it is illuminating to […]

App note: Emitters and detectors for infrared (IR) touchscreens

App note from OSRAM about IR LEDs and IR detectors used on touchscreen technologies. Link here (PDF) Touchscreens as a popular user interface are more and more common. Applications span from public information systems to customer self-service terminals. Thus, as a logical step, more and more devices today feature this kind of user interface, e.g. […]