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IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)

PAM2305 Description Pin Assignments
PAM2305 Description Pin Assignments

... This formula has a maximum at VIN = 2VOUT, where IRMS = IOUT /2. This simple worst-case condition is commonly used for design because even significant deviations do not offer much relief. Note that the capacitor manufacturer's ripple current ratings are often based on 2000 hours of life. This makes ...
TLC5618A 数据资料 dataSheet 下载
TLC5618A 数据资料 dataSheet 下载

... NOTES: 1. The relative accuracy or integral nonlinearity (INL) sometimes referred to as linearity error, is the maximum deviation of the output from the line between zero and full scale excluding the effects of zero code and full-scale errors. 2. The differential nonlinearity (DNL) sometimes referre ...
Using a Supercapacitor to Power Wireless Nodes from a 3V Button
Using a Supercapacitor to Power Wireless Nodes from a 3V Button

...  R determined so Trecharge < 5RC, supercap charged to 99% of Vbatt. In the circuit of Fig 4, this would be 5 x 2400 = 3hrs 20 mins ...
USB Dedicated Charging Port Controller (Rev. C)
USB Dedicated Charging Port Controller (Rev. C)

... required to ensure host and client-side devices meet the power management requirements. Traditionally, USB host ports following the USB 2.0 Specification must provide at least 500 mA to downstream client-side devices. Because multiple USB devices can be attached to a single USB port through a bus-po ...
Journal of Power Electronics, Vol. 14, No. 6, pp
Journal of Power Electronics, Vol. 14, No. 6, pp

... DC/AC converter, which requires energy storage elements, such as battery or capacitor banks. These DVRs suffer from disadvantages, such as limited time of compensation, high cost, and bulky energy storage devices [14]-[17]. The second group of DVRs is realized without a DC link using direct AC/AC co ...
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A New Low-Cost Flexible IGBT Inverter Power Module for
A New Low-Cost Flexible IGBT Inverter Power Module for

... been developed for home appliance applications, using six NPT 600V IGBT dies, six free wheeling diode dies, one three-phase monolithic, level shifting driver chip, three bootstrap diodes with current limiting resistors and an NTC thermistor. All the parts have been selected for low cost coupled with ...
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Sub-Micron Gate Length Field Effect Transistors as Broad

Active inductor-based tunable impedance matching network for RF
Active inductor-based tunable impedance matching network for RF

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TPS2379 - Texas Instruments
TPS2379 - Texas Instruments

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16615

Physics -2 Laboratory Manual (PH
Physics -2 Laboratory Manual (PH

... ET = (E Rp)l/(R + Rp)L, then the maximum error in measuring ET will be – ...
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What Are TVS Diodes

... state after the transient threat passes. TVS diodes will not wear out nor will there be any degradation of the ...
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LC05111CMT

... Caution 1) Absolute maximum ratings represent the values which cannot be exceeded even for a moment. Caution 2) If you should intend to use this IC continuously under high temperature, high current, high voltage, or drastic temperature change, even if it is used within the range of absolute maximum ...
Bipolar Junction Transistors
Bipolar Junction Transistors

... AC Alpha (αAC) – The ratio of the input emitter current change to the output collector current change in a C-B transistor ...
AN-1126: More Boost with Less Stress: the SEPIC
AN-1126: More Boost with Less Stress: the SEPIC

MAX9657/MAX9658 Quad Video (Filter) Amplifiers with Input Sync-Tip Clamps General Description
MAX9657/MAX9658 Quad Video (Filter) Amplifiers with Input Sync-Tip Clamps General Description

... filters typically have ±1dB passband flatness out to 9.5MHz and 47dB attenuation at 27MHz. Specially suited for composite video signals, the MAX9658 is ideal for performing anti-alias filtering at the inputs of a digital video recorder or for performing reconstruction filtering at the outputs of a S ...
General Description Features
General Description Features

... Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Expo ...
DS2745 Low-Cost I C Battery Monitor
DS2745 Low-Cost I C Battery Monitor

... In the active mode of operation, the DS2745 continually measures the current flow into and out of the battery by measuring the voltage drop across a low-value current-sense resistor, RSNS, connected between the SNS and VSS pins. The voltage sense range between SNS and VSS is ±51.2mV. Note that posit ...
超低功耗、负轨输入、 轨至轨输出、全差分放大器 THS4521-HT 特性
超低功耗、负轨输入、 轨至轨输出、全差分放大器 THS4521-HT 特性

KMY/KMZ Linear Magnetic Field Sensors
KMY/KMZ Linear Magnetic Field Sensors

... field range. The sensor is available in two types: the KMY 20 M, KMY 21 M and KMZ 20 M sensor types contain intrinsic magnets which provide an auxiliary magnetic field (in x-direction) at the sensor die which prevents magnetic domains from flipping irregularly. ...
MAX16063 1% Accurate, Low-Voltage, Quad Window Voltage Detector General Description
MAX16063 1% Accurate, Low-Voltage, Quad Window Voltage Detector General Description

... The MAX16063 is an adjustable quad window voltage detector in a small thin QFN package. This device is designed to provide a higher level of system reliability by monitoring multiple supply voltages and providing a fault signal when any of the voltages exceeds its overvoltage threshold or falls belo ...
Application Note ANI19 Selecting Charge Pump Capacitors
Application Note ANI19 Selecting Charge Pump Capacitors

... Reducing these capacitor values will limit the ability of the transceiver to maintain the DC voltages needed to generate the RS-232 output levels. The capacitor value range for all of the current Sipex products is listed on the Sipex website.1 Capacitors C3 and C4 are the output storage elements. Th ...
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Resistive opto-isolator



Resistive opto-isolator (RO), also called photoresistive opto-isolator, vactrol (after a genericized trademark introduced by Vactec, Inc. in the 1960s), analog opto-isolator or lamp-coupled photocell, is an optoelectronic device consisting of a source and detector of light, which are optically coupled and electrically isolated from each other. The light source is usually a light-emitting diode (LED), a miniature incandescent lamp, or sometimes a neon lamp, whereas the detector is a semiconductor-based photoresistor made of cadmium selenide (CdSe) or cadmium sulfide (CdS). The source and detector are coupled through a transparent glue or through the air.Electrically, RO is a resistance controlled by the current flowing through the light source. In the dark state, the resistance typically exceeds a few MOhm; when illuminated, it decreases as the inverse of the light intensity. In contrast to the photodiode and phototransistor, the photoresistor can operate in both the AC and DC circuits and have a voltage of several hundred volts across it. The harmonic distortions of the output current by the RO are typically within 0.1% at voltages below 0.5 V.RO is the first and the slowest opto-isolator: its switching time exceeds 1 ms, and for the lamp-based models can reach hundreds of milliseconds. Parasitic capacitance limits the frequency range of the photoresistor by ultrasonic frequencies. Cadmium-based photoresistors exhibit a ""memory effect"": their resistance depends on the illumination history; it also drifts during the illumination and stabilizes within hours, or even weeks for high-sensitivity models. Heating induces irreversible degradation of ROs, whereas cooling to below −25 °C dramatically increases the response time. Therefore, ROs were mostly replaced in the 1970s by the faster and more stable photodiodes and photoresistors. ROs are still used in some sound equipment, guitar amplifiers and analog synthesizers owing to their good electrical isolation, low signal distortion and ease of circuit design.
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