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Posts Tagged ‘app note’

App note: Implementation of a single-phase electronic watt-hour meter using the MSP430AFE2xx

Sunday, October 15th, 2017

Another energy meter from Texas Instruments using MSP430AFE2xx. Link here (PDF) This application report describes the implementation of a single-phase electronic electricity meter using the Texas Instruments MSP430AFE2xx metering processors. It includes the necessary information with regard to metrology software and hardware procedures for this single chip implementation.

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App note: Atmel AVR465: Single-phase power/energy meter with tamper detection

Sunday, October 15th, 2017

A good read from Atmel on their 8-bit microcontroller single-phase energy meter design. Link here (PDF) This application note describes a single-phase power/energy meter with tamper logic. The design measures active power, voltage, and current in a single-phase distribution environment. It differs from ordinary single-phase meters in that it uses...

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App note: Capacitance change with applied DC voltage

Sunday, October 8th, 2017

Tantalum comparison to other types of capacitors shows stable capacitance in this app note from Vishay, Link here (PDF) Tantalum capacitors in general - and Vishay’s 298D/TR8/TM8 MicroTan tantalum capacitors in particular - demonstrate very stable performance over the DC voltage (bias) applied in an application. At the same time,...

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App note: Extend current transformer range

Sunday, October 8th, 2017

Design note from Texas Instruments on technique in resetting and negative voltage generation from current transformers. Link here (PDF) Transformers are used extensively for current sensing because they can monitor currents with very low power loss and they have wide bandwidth for good waveform fidelity. Current transformers perform well in...

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App note: USB Type-C, CC Pin Design Considerations

Sunday, October 1st, 2017

Application note from ON Semiconductor on USB Type-C connector supporting non-USB standard charging protocol, Link here (PDF) When designing hardware systems with Type−C connectors, a designer also has to consider all legacy, standard, and non-standard specifications that exist in the USB connector eco system. With the introduction of the Type−C...

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App note: PCB routing methodology for SuperSpeed USB 3.1 switch family from ON Semiconductor

Sunday, October 1st, 2017

Routing USB 3.1 traces app note from ON Semiconductor. Link here (PDF) The introduction of USB Type−C has provided a significant launch opportunity for USB3.1 data rates across an array of platforms from portable to desktop and beyond. This proliferation of Type−C will certainly create challenges due to the high...

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App note: How to measure the power consumption of a peripheral

Sunday, September 24th, 2017

Application note from NXP Semiconductors on MCU peripheral power consumption measurement. Link here (PDF) This Application Note outlines the steps to measure the power consumption of a peripheral and figure out some key points in the measurement. The document takes low-power timer (LPTMR) and LPUART as examples to introduce the...

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App note: TEA1938T GreenChip SMPS control IC

Sunday, September 24th, 2017

TEA1938T SMPS control IC application note from NXP Semiconductors. Link here (PDF) The TEA1938T is a high-featured low-cost DCM and QR mode flyback converter controller. It provides high efficiency at all power levels and very low no-load power consumption at nominal output voltage in burst mode operation. To minimize ripple,...

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App note: Using trench technology MOSFETs in hot swap applications

Sunday, September 17th, 2017

Safely use trench MOSFETs on hot swap application by determining its operation within its SOA in a limited time, app note from International Rectifier. Link here (PDF) Hot Swap circuits are used to allow for “Hot Plugging” of circuit boards into back planes. The applications that require such functionality are...

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App note: Class D audio amplifier performance relationship to MOSFET parameters

Sunday, September 17th, 2017

Application note from International Rectifier on MOSFET paremeters to consider when designing a Class D audio amplifier. Link here (PDF) Class D audio amplifier is a switching amplifier that consists in a pulse width modulator (with switching frequency in order of several hundred kHz), a power bridge circuit and a...

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App note: 12Vac LED Driving without smoothing capacitors

Sunday, September 10th, 2017

Application note from Diodes Incorporated on driving 12Vac LED without smoothing capacitors with their Zetex ZXLD1360 LED driver IC and SBR2A40P1 super barrier rectifier. Link here (PDF) LED based architectural lighting is now coming of age, but there are still some problems to be considered when designing luminaires to be...

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App note: CAN Bus – Common high speed physical layer problems

Sunday, September 10th, 2017

App note from Vector on three commonly encountered high speed CAN physical layer problems - bus termination, signal levels, and ground. Link here (PDF) Determining the exact cause of a CAN problem is not at all simple. Is the problem in hardware or software? Is the problem on the circuit...

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App note: Through-Hole versus SMD components

Sunday, September 3rd, 2017

App note from Vishay on the advantages of using Through-Hole mounting. Link here (PDF) Most electronic gadgets are designed to interface with humans, and we humans are very abusive to most electronic devices. We drop them, poke them, open and close them, and in general feed stuff into and out...

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App note: Thermal management in surface-mounted resistor applications

Sunday, September 3rd, 2017

App note from Vishay on PCB thermal management specifically on components like SMD resistors, where if allowed a design change (e.g. change in SMD size or change in more heat tolarant ones) must be implemented in order to squeeze more thermal capability. Link here (PDF) Thermal management is becoming more...

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App note: Minimizing the temperature dependence of digital potentiometers

Sunday, August 27th, 2017

Application notes from NIDEC COPAL Electronics Corp. about digital potentiometer's temperature dependence. Link here (PDF) The digital potentiometers (DP) has two temperature dependent parameters, the TC of the end-to-end resistance Rpot and the ratiometric TC. The temperature dependence of the parameters of an analog circuit using a digital potentiometers is...

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App note: Potentiometers and trimmers

Sunday, August 27th, 2017

App note from Vishay on variable resistors primer. Link here (PDF) A potentiometer is a mechanically actuated variable resistor with three terminals. Two of the terminals are linked to the ends of the resistive element and the third is connected to a mobile contact moving over the resistive track. The...

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App note: How RF transformers work and how they are measured

Sunday, August 20th, 2017

Application note from Mini-Circuits about transformers, this time the RF transformers. Link here (PDF) RF transformers are widely used in electronic circuits for * Impedance matching to achieve maximum power transfer and to suppress undesired signal reflection. * Voltage, current step-up or step-down. * DC isolation between circuits while affording...

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App note: Transformers

Sunday, August 20th, 2017

App note from Mini-Circuits on transformer types and some basics of them. Link here (PDF) The purpose of this application note is to describe the fundamentals of RF and microwave transformers and to provide guidelines to users in selecting proper transformer to suit their applications. It is limited to core-and-wire...

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App note: Selecting a FET for use with the Si875x driver

Sunday, August 13th, 2017

Another application note from Silicon Labs on determining the proper FET used on their Si875x driver based on its application. Link here (PDF) The Si875x enables creating custom solid state relay (SSR) configurations. Supporting customer-selected external FETs, the Si875x combines robust isolation technology with a FET driver to form a...

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App note: Driving MOSFET and IGBT switches using the Si828x

Sunday, August 13th, 2017

App note from Silicon Labs on their MOSFET and IGBT driver Si828x and how to determining its external components to achieve optimized performance. Link here (PDF) The Si828x products integrate isolation, gate drivers, fault detection protection, and operational indicators into one package to drive IGBTs and MOSFETs as well as...

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