App note: eFuse reverse voltage protection

App note from ON Semiconductors about eFuses’ ability to block reverse voltage. Link here (PDF) One area in which they (eFuses) differ in performance is reverse polarity protection. While a TVS device and polyfuse will protect against reverse voltages, the nature of an integrated semiconductor device does not inherently allow for this type of protection. […]

App note: Implementation of error code correction in EEPROMs

App note from ON Semiconductors about their EEPROM error correction. Link here (PDF) Some of ON’s automotive EEPROMs, like the Grade 0 NV25xxx family (SPI, 1 – 64 Kb) and the Grade 1 CAV24Cxx / CAV25xxx (Grade 1, 128 Kb and higher) implement an Error Code Correction scheme. What this means is that for each […]

App note: Revolutionizing analog to digital conversion

App note from ON Semiconductors introducing their nano power ADC NCD9801x. Link here (PDF) The NCD9801x ADC is a differential 12−bit resolution successive approximation register analog−to−digital converter unlike any other SAR ADC available on the market. It uses an innovative design to keep a low input capacitance of 2 pF, easily besting the typical SAR […]

App note: Applications of current DACs

App note from Maxim Integrated about current DACs and their uses. Link here The worldwide use of the electronic devices creates high demands for DACs to connect digital systems to the analog world such as the fiber optical communication networks, to bias photo diodes or to digitally control analog devices such as power supplies to […]

App note: Design and application guide of bootstrap circuit for high-voltage gate-drive IC

A deeper dive into controlling gates of MOSFETs with boostrap circuits talked in this app note from ON Semiconductors. Link here (PDF) The purpose of this paper is to demonstrate a systematic approach to design high−performance bootstrap gate drive circuits for high−frequency, high−power, and high−efficiency switching applications using a power MOSFET and IGBT. It should […]

App note: Understanding eFuse input voltage transients from hot plug events

App note from ON Semiconductors about things to look for when hot plugging eFuses. Link here (PDF) System designers must account for voltage surges that occur when supplies or loads are connected. eFuses are integrated circuits with many features to protect loads from these surges. However, it is important to ensure that the eFuse itself […]

App note: Lithium-Ion cell fuel gauging with MAXIM battery monitors ICs

App note from Maxim Integrated on accurately measuring battery capacity by using battery monitors and fuel gauge plus software. Link here Determining the remaining charge of a Lithium-Ion cell accurately under real world conditions requires much more than just coulomb counting. The DS2438’s integrated current accumulator (ICA) provides an accurate measurement of cell capacity under […]

App note: Implementing a practical off-line Lithium-Ion charger using the UCC3809 primary side controller and the UCC3956 battery charger controller

App note from Texas Instruments about Li-Ion battery charger design. Link here (PDF) A primary goal in the design of any portable electronic device is to make the product as small and lightweight as possible. When the device is powered by a rechargeable battery, a means of charging the battery from the AC line must […]

App note: Vishay load dump TVS series for 24 V powertrains

App note from Vishay on the changes to the load dump test condition and defines the maximum surge suppressing capability for Vishay load dump TVS series in these conditions. Link here (PDF) As more trucks and buses are built with complex electrical systems, load dump protection is becoming an important safety feature for vehicles with […]

App note: Signals with zero offsets

Dealing with zero offsets signals tackled in this app note from Murata. Link here (PDF) Many transducer outputs exhibit a dc offset voltage when the output level would normally be expected to be zero Volts (corresponding to a display reading of “000”). As an example, consider a pressure transducer whose output levels of 1.0Vdc to […]

App note: Analog common and Reference IN-OUT

App note on Murata’s Digital panel volt meters analog common and reference pins. Link here (PDF) Perhaps the least understood I/O pin on all DMS Series DPM’s is ANALOG COMMON. The confusion surrounding this pin is not unjustified since it should be left open, i.e., have no external connections, in the vast majority of normal […]

App note: Voltage proof test for metalized film capacitors

App note from Vishay about self recovery of metalized film caps. Link here (PDF) Voltage proof tests, also called “high pot” tests, are used to check if a capacitor has a breakdown failure mode occurring at a certain test voltage. The detection of breakdown is done by a current detection, specified if exceeding a certain […]

App note: Secure Key Storage

App note from Silicon Labs on their EFR32 device secure features Key encryption. Link here (PDF) Secure Key Storage is a feature in Secure Vault-enabled Series 2 devices that allows for the protection of cryptographic keys by key wrapping. User keys are encrypted by the device’s root key for non-volatile storage for later usage. This […]

App note: Input for magnetometer placement simulations

App note from Kionix on things to look for and placement evaluation before placing magnetometer on PCBs. Link here (PDF) Simulations of the magnetic field environment to provide magnetometer part placement recommendations need considerable technical information to assist the process. Magneto-static and magnetic noise information of the materials and magnetic field sources need to be […]

App note: Handheld electronic compass applications using a Kionix MEMS Tri-Axis accelerometer

App note from Kionix on the how to’s of handheld compass, diving into Earth’s magnetic basics, plots and equations. Link here (PDF) Today’s world is about mobility. The expanded and growing availability of cell phones, PDA’s and GPS has resulted in a massive integration of features into handheld devices. Growing in popularity, the integrated electronic […]

App note: How to filter the input of a high-side current sensing

App note from STMicroelectronics on high-side current sense RF noise filtering. Link here (PDF) In an application such as a power supply or a DC-DC converter, the voltage output is generally noisy. Some spikes load the current. Alternatively, a temporary over voltage might occur creating either common mode or differential noise. Such high frequency signals […]

App note: New family of 150V power schottky

App note from STMircoelectronics on the advantage of power schottky over bipolar diode in SMPS. Link here (PDF) Nowadays, the Switch Mode Power Supply (SMPS) is becoming more widespread as a result of computer, telecom and consumer applications. The constant increase in services (more peripherals) and performance, which offers us these applications, tends to move […]

App note: Generating negative output voltage from positive input voltage using MAX17291 boost converter IC with active discharge feature

App note from Maxim Integrated about their MAX17291 generating negative voltage from positive input. Link here Many applications require the power supply to provide a negative voltage, such as LCD displays, gate drivers, embedded applications, op-amp circuits, etc,. This application note explains how to generate a negative output voltage from a positive input voltage using […]

App note: External programmable current limit for MAX38902 LDO

App note from Maxim Integrated about adding additional current limiting circuit for their MAX38902 LDO. Link here Current limit in a LDO establishes an upper threshold for the current delivered. In a low dropout linear regulator architecture, the input and output average currents, which are connected by a series pass-through transistor, are almost the same. […]

App note: How to measure the efficiency of a multiphase buck converter integrated circuit

Tips from Maxim Integrated on how to measure efficiency on complicated multiphase converters. Link here Due to the nature of multiphase buck converters, perceived efficiency varies for a static operating condition depending on the load and output voltage measurement connections, as well as the symmetry of the PCB layout. An engineer evaluating multiphase buck converters […]