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: 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: Keys to high flexibility

Ever wonder why some wires used on moving attachments last long? Cicoil who innovate the flat ribbon cable has done a lot since early computers on hi-flex wires. Link here Most industrial wire is made up of multiple wire strands, called ‘base strands’, rather than being made of a solid piece of metal. Multiple strands […]

App note: Insulating and Jacketing Materials

Different application calls for different insulations, heres a great info on different insulation and jacketing materials from Calmont wire & cable Inc. Link here Today’s wire user has a wide range of plastic insulating materials to choose from, and yet the selection of a particular dielectric for a specific application frequently is a trade-off in […]

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. […]

App note: FPGA power supply considerations

App note from Vishay Siliconix, giving us tips on powering FPGAs. Link here (PDF) An FPGA is a device that offers many logic elements – up to 1 million gates in a single device at this writing – as well as other functionality such as transceivers, PLLs, and MAC units for complex processing. FPGAs are […]

App note: Inductive switching for dual 24 and 36 V High-side switch families (XS4200 and XSD200)

Another app note from NXP describing the behavior of the SMARTMOS Dual 24 – 36 V high-side switch devices, at switch OFF when driving inductive loads. Link here (PDF) These intelligent high-side switches are designed to be used in 24 V systems such as trucks and busses (XS4200). They can be used in industrial (XSD200) […]

App note: Repetitive short-circuit performances of the MC12XS6 IC’s family

App note from NXP about the short-citcuit protection strategies of their MC12XS6 centralized automotive lighting drivers family IC. Link here (PDF) The MC12XS6 devices include up to five self-protected high-side switches, with its extended protection and diagnostics, to detect bulb outage and short-circuit fault conditions. Additionally, this device incorporates a pulse width modulation control module, […]

App note: Orientations and Rotations

App note from Kionix on the introduction of most common method in determining orientation and rotations in an accelerometer. Link here (PDF) The fact that accelerometers are sensitive to the gravitational force on the device allows them to be used to determine the attitude of the sensor with respect to the reference gravitational vector. This […]

App note: Paralleling eFuses

ON Semiconductors guide to cover much higher current capacity from eFuses. Link here (PDF) The standard 12 V, 5 V and 3.3 V electronic fuses from ON Semiconductor provide overcurrent and overvoltage protection and come in different current limit configurations. As an example, the 5 V NIS5452 eFuse has a recommended operational 5 A current […]

App note: How to prevent thermal issues with high output current DC to DC converters in portable applications

Tips and tricks from ON Semiconductors on how to optimize high output current switching regulators thermal dissipation. Link here (PDF) As power demand in portable designs is more and more important, designers must optimize full system efficiency in order to save battery life and reduce power dissipation. Energy losses study allows knowing thermal stakes. Due […]

App note: High-power emitters for illumination applications

App note from OSRAM on High-power LEDs and their special requirements. Link here (PDF) In general high power emitters can be driven with DC currents in the range of 1 Ampere whereas most low power products like 5 mm Radials are limited to 100 mA. As the light output increases with driving current the optical […]

App note: MC13783 buck and boost inductor sizing

NXP’s app note on calculating inductor sizes using MC13783 PWM controller as example. Link here (PDF) The purpose of this application note is to provide a method of choosing the size of the inductors for the optimized switching regulators versus the current consumption of the application. This will allow to optimize the size and the […]

App note: Analog switch lowers relay power consumption

Clever way of starting-up relays discussed in this app note from Maxim Integrated. Link here Relays are often used as electrically controlled switches. Unlike transistors, their switch contacts are electrically isolated from the control input. On the other hand, the power dissipation in a relay coil may be unattractive for battery-operated applications. You can lower […]

App note: Thermal mass flow sensors for gas and liquid applications

White paper from Integrated Device Technology on the emergence of MEMS thermal mass flow sensors. Link here (PDF) Flow meters represent the instrumentation of flow sensors and are used to measure the amount of flow that passes through them. There are in principal five different flow meter types: velocity flow, positive displacement flow, differential pressure […]

App note: Ferrite bead demystified

App note from Analog Devices hinting for proper selection of ferrite bead for you applications. Link here (PDF) An effective method for filtering high frequency power supply noise and cleanly sharing similar supply rails is the use of ferrite beads. A ferrite bead is a passive device that filters high frequency noise energy over a […]

App note: Silicon Labs’ TS3004 VS. the CMOS 555 – Determining lowest supply current for battery-powered applications

Good read on this app note from Silicon Labs comparing their low power but obsolete timer. Link here (PDF) The 555 timer is the workhorse of ICs, with close to a billion of them manufactured every year. Introduced in 1972, the 555 is still in widespread use because of its ease of use, reasonable price, […]

App note: Single-cell regulated Q-pump draws low quiescent current

Q-pump an alternative to inductor charge pump boost regulator for low power and sleepy microcontroller from Silicon Labs. Link here (PDF) In the switch-mode power supply world, capacitor-based charge pumps (or Q-pumps) generally aren’t useful for heavy lifting, but work well in niche micropower applications where space is at a premium. They work best in […]