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NCP58300 - Very Low Dropout Fast Transient
NCP58300 - Very Low Dropout Fast Transient

... The NCP58300 series are high precision, very low dropout (VLDO), low ground current positive voltage regulators that are capable of providing an output current in excess of 3.0 A with a typical dropout voltage lower than 370 mV at 3.0 A load current. The devices are stable with tantalum output capac ...
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... threshold voltage, is > 2/3(VCC), the output at pin 3, v3, is low, that is pin 3 is at zero volts. At the same time an internally connected switch transistor that is connected between the discharge, pin 7, and ground, pin 1, is turned ON. With the discharge transistor reducing the voltage at pin 6 t ...
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Fixed Resistors - TT Electronics
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Ph 213 – Challenging Problems (set 6) Name: Due: August 6, 2013
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File u208b | allcomponents.ru
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... Pin 6, then a trigger pulse is generated whose width tp is determined by the value of C2 (the value of C2 and hence the pulse width can be evaluated by assuming 8 ms/nF). The current sensor on Pin 8 ensures that, for operation with inductive loads, no pulse will be generated in a new half cycle as l ...
- Universal College of Engineering & Technology
- Universal College of Engineering & Technology

... have it’s initial resistance (or impedance in case of AC) “R” conducting a current of “I” through it, And if the resistance of the branch is changed by a factor of R , with it’s final resistance R+ R , the final effect in various branches due to the change in the resistance of the branch can be calc ...
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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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