Tips from ROHM Semiconductor to estimate the stability of linear regulator using simple step response method. Link here (PDF) Low drop-out (LDO) regulators developed back in the age when large-capacitance multi-layer ceramic capacitors (hereinafter, MLCCs) were uncommon cause a phase delay, leading to oscillation when connected to a low-ESR capacitor like an MLCC. Often, MLCCs […]
Tag Archives: app note
App note: Reset and supervisor ICs – frequently asked questions
All about supervisor ICs FAQs from STMicroelectronics. Link here (PDF)
App note: Receiving S/PDIF audio stream with the STM32F4/F7/H7 series
App note from STMicroelectronics about electrically connecting an external S/PDIF stream to an STM32 with an S/PDIFRX interface peripheral, Link here (PDF) The Sony/Philips Digital Interface Format (S/PDIF) is a point-to-point protocol for serial and uni-directional transmission of digital audio through a single transmission line for consumer and professional applications. The transmission of data can […]
App note: Bootstrap circuit in the buck converter
App note from ROHM Semiconductor about bootstrap capacitor used in switching regulator chip. Link here (PDF) This application note explains the step-up circuit using a bootstrap capacitor. In buck converters, this circuit is used when the highside switch is the N-ch MOSFET.
App note: Linear regulator problem situations – Power supply does not start
App note from ROHM Semiconductor about various start up problem on 3 pins linear regulator. Link here (PDF) Although linear regulators can be used to easily configure power supplies, the linear regulators may cause startup problems depending on the type of loads. This application note introduces cases where the power supplies do not start correctly […]
App note: MUX-friendly precision operational amplifiers
Another App note from Texas Instruments on op-amp input safety from breakdown voltages during source switch-over. Link here (PDF) Multiplexing is a frequently used technique to perform data acquisition in multichannel systems with minimal signal-chain requirements. In this context, the role of the multiplexer (MUX) in an acquisition system is to switch between channels, and […]
App note: Precision current measurements on high-voltage powersupply rails
Two methods for measuring current and what sense amplifier used are tackled in this app note from Texas Instruments. Link here (PDF) Current is a signal that can provide valuable insight into how a system is operating. Under defined conditions, the amount of current required to perform a task is consistent, making the current information […]
App note: Thermal consideration of flash LEDs
Pulsed LED application like flash LEDs requires adequate thermal management to counter the heavy heat caused by larger current, here’s an app note from OSRAM discussing on thermal management of LEDs. Link here (PDF) This application note focuses on how to develop an adequate thermal management for LEDs in camera flash applications. It provides information […]
App note: Dimming InGaN LEDs
App note from OSRAM on InGaN LEDs dimming method without penalty on its wavelength. Link here (PDF) While the InGaN technology produces the brightest light output across Blue, Deep blue, Verde, True green and White, it is important to understand that the wavelength of the light emitted depends on the forward current. In order to […]
App note: Securing vibration motor leads and wires
App note from Precision Microdrives on how to properly connect wires on to vibration motors for reliability. Link here Vibration motors require electrical power, which must be delivered by wires or PCB tracks to the motor. Precision Microdrives vibrating motors are available in a range of connector forms. From stock, they are available with factory […]
App note: Vibration Motors – Voltage Vs Frequency Vs Amplitude
All about vibration motors and how its frequency and amplitude be controlled in this app note from Precision Microdrives. Link here We’re often asked how to adjust the vibration amplitude or frequency of our various vibration motors. In this article, we’ll look at how simple it is, why it can be useful, and how we […]
App note: Ceramic resonators
All about ceramic resonators app note from Abracon. Link here (PDF) Why Ceramic Resonators? Ceramic resonators stand between quartz crystals and LC/RC oscillators in regard to accuracy. They offer low cost and high reliability timing devices with improved start-up time to quartz crystals.
App note: MELF resistors – The world’s most reliable and predictable, high-performing film resistors
App note from Vishay on why MELF resistors are so successful and has no alternative in today’s application. Link here (PDF) For more than 25 years, Vishay’s MELF resistors have successfully met the demanding requirements of the automotive industry. They offer superior SMD resistor performance in terms of accuracy, stability, reliability, and pulse load capability. […]
App note: Understanding the characteristics of Li-ion batteries and Richtek power management solutions
App note from Richtek on how to work with Li-ion batteries properly. Link here Lithium-ion/polymer rechargeable batteries, which have been widely used today, have distinguished properties, but are very delicate and have to be used with extreme care. Improper use of Li-ion batteries will bring about catastrophic consequences. The incidences of burning and explosions of […]
App note: Power IC solutions for IoT / Portable / Wearable / Battery-Powered applications
A tidy and organized power solution list from Richtek. Link here (PDF)
App note: Driving LEDs with a PIC Microcontroller
An App note from OSRAM on an Intelligent control circuitry example using a PIC Microcontroller. Link here (PDF) Nowadays, applications increasingly make use of LEDs as a replacement for traditional light bulbs. For example, LEDs are frequently used in the design of automobile tail lights, signal lights, traffic signals, and variable message signs. LEDs provide […]
App note: Package-related thermal resistance of LEDs
App note from OSRAM on thermal resistance for LEDs and IREDs (IR emitting diodes). Link here (PDF) In order to achieve the expected reliability, lifetime and optimal performance of LEDs, especially for high-power LEDs, appropriate thermal management is of the utmost importance. One of the key parameters for good thermal management is the temperature of […]
App note: Increasing accuracy in feedback circuits and voltage dividers with thin film chip resistor arrays
App note from Vishay on using chip resistors to achieve long-term stability. Link here (PDF) Thin film chip resistor arrays consist of several resistors of equal or different values combined in one package. During the manufacturing processes and the device’s lifecycle, all the particular resistors virtually experience identical conditions, which allow the specification of their […]
App note: Custom magnetics – What are they and when do you need them?
Consideration factors before going to custom magnetic request from manufacturer, an app note from Vishay. Link here (PDF) There are many manufacturers that claim they build custom magnetics. However, there is often confusion as to what constitutes custom magnetics and whether or not a designer actually needs them or can afford them. This article will […]
App note: Simplify home audio systems With the PCM9211 – A versatile audio interface transceiver
A digital interface PCM9211 from Texas Instruments app note. Link here (PDF) 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 […]