ILD4180 1.8A DC/DC Step-Down Converter LED Driver for Industrial Applications
... and regulating a constant LED current. The constant current regulation is especially beneficial for LED color accuracy and longer lifetime. The ILD4180 also has a PWM input which can be used for LED dimming. The switching frequency of 370kHz allows to use small and inexpensive passive components. An ...
... and regulating a constant LED current. The constant current regulation is especially beneficial for LED color accuracy and longer lifetime. The ILD4180 also has a PWM input which can be used for LED dimming. The switching frequency of 370kHz allows to use small and inexpensive passive components. An ...
Electricity – Part 1 - University College Dublin
... When two materials are brought into contact with each other electrons can be transferred from one to another giving the latter a negative charge If a static charge is allowed to build up on a material then when a conductor is brought close to the affected area a spark can jump from one to the other ...
... When two materials are brought into contact with each other electrons can be transferred from one to another giving the latter a negative charge If a static charge is allowed to build up on a material then when a conductor is brought close to the affected area a spark can jump from one to the other ...
FEE64 power supply system Revision A The Revision A of the
... The Logic supplies for the FPGA and peripherals are sourced from 5v powered DC-DC convertors. There are four voltages from two dual output 8A modules. The switchers are required to make the power losses and associated junction temperatures in the LDOs fall within reasonable ranges. Module 1: ch1 => ...
... The Logic supplies for the FPGA and peripherals are sourced from 5v powered DC-DC convertors. There are four voltages from two dual output 8A modules. The switchers are required to make the power losses and associated junction temperatures in the LDOs fall within reasonable ranges. Module 1: ch1 => ...
The Charge to Mass (e/m) Ratio of Electrons
... on scale. When not in use it should be kept on the least sensitive scale. Minimize all motion when making a measurement as any movements of body or cables can cause large capacitive fluctuations in the current reading. The picoammeter cannot respond instantaneously to changes in input and when makin ...
... on scale. When not in use it should be kept on the least sensitive scale. Minimize all motion when making a measurement as any movements of body or cables can cause large capacitive fluctuations in the current reading. The picoammeter cannot respond instantaneously to changes in input and when makin ...
Module 1, Lesson 2 – Introduction to electricity Teacher 45 minutes
... test leads into the multimeter sockets. For DC voltage, connect the black test lead to the negative polarity point (ground) socket (usually colored black) and the red lead to the positive polarity test point (usually labeled with a “V”, although it may be labeled with other units in addition to the ...
... test leads into the multimeter sockets. For DC voltage, connect the black test lead to the negative polarity point (ground) socket (usually colored black) and the red lead to the positive polarity test point (usually labeled with a “V”, although it may be labeled with other units in addition to the ...
STI13005-1
... ECOPACK® packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions and product status are available at: www.st.com. ECOPACK® is an ST trademark. ...
... ECOPACK® packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions and product status are available at: www.st.com. ECOPACK® is an ST trademark. ...
0-30 vdc stabilized power supply with current control
... the transformers secondary winding is rectified by the bridge formed by the four diodes D1-D4. The DC voltage taken across the output of the bridge is smoothed by the filter formed by the reservoir capacitor C1 and the resistor R1. The circuit incorporates some unique features which make it quite di ...
... the transformers secondary winding is rectified by the bridge formed by the four diodes D1-D4. The DC voltage taken across the output of the bridge is smoothed by the filter formed by the reservoir capacitor C1 and the resistor R1. The circuit incorporates some unique features which make it quite di ...
An Improved Current Mode Logic Latch
... Millimeter wave and radio frequency circuits are developing rapidly nowadays, such as frequency synthesizers and timing recovery circuits[1,2] . The high speed frequency divider plays a critical part in these circuits[3] . More importantly, because of the high frequency operation nature of the block ...
... Millimeter wave and radio frequency circuits are developing rapidly nowadays, such as frequency synthesizers and timing recovery circuits[1,2] . The high speed frequency divider plays a critical part in these circuits[3] . More importantly, because of the high frequency operation nature of the block ...
RESISTORS FOR LIGHTING APPLICATIONS
... axial and surface mount resistors as seen in other forms of ballast, but require low value current sense resistors to provide feedback signals for pre-heat, ignition, dimming and fault currents. TT electronics can offer low value current sense resistors with enhanced pulse performance for surface mo ...
... axial and surface mount resistors as seen in other forms of ballast, but require low value current sense resistors to provide feedback signals for pre-heat, ignition, dimming and fault currents. TT electronics can offer low value current sense resistors with enhanced pulse performance for surface mo ...
Presentation_W04D2
... Note that when current is flowing, the conductor is not an equipotential surface (and Einside ≠ 0)! P10- 9 ...
... Note that when current is flowing, the conductor is not an equipotential surface (and Einside ≠ 0)! P10- 9 ...
P0470196100
... requiring small EMI filter components that, in some cases, may be eliminated. This reduces the number of stages, increases efficiency and decreases cost [10]. ...
... requiring small EMI filter components that, in some cases, may be eliminated. This reduces the number of stages, increases efficiency and decreases cost [10]. ...
RFVA1027 数据资料DataSheet下载
... Exceeding any one or a combination of the Absolute Maximum Rating conditions may cause permanent damage to the device. Extended application of Absolute Maximum Rating conditions to the device may reduce device reliability. Specified typical performance or functional operation of the device under Abs ...
... Exceeding any one or a combination of the Absolute Maximum Rating conditions may cause permanent damage to the device. Extended application of Absolute Maximum Rating conditions to the device may reduce device reliability. Specified typical performance or functional operation of the device under Abs ...
Electromagnetic compatibility of power converters
... Start but oscillations with a wrong output voltage (usually too low). ...
... Start but oscillations with a wrong output voltage (usually too low). ...
Photo electric
... is above the threshold frequency, electrons are emitted almost immediately even if the light intensity is very small. These facts cannot be explained on a classical basis in which the light is considered to be oscillating electric and magnetic fields. In 1905 Albert Einstein explained this mystery b ...
... is above the threshold frequency, electrons are emitted almost immediately even if the light intensity is very small. These facts cannot be explained on a classical basis in which the light is considered to be oscillating electric and magnetic fields. In 1905 Albert Einstein explained this mystery b ...
V/F Converter ICs Handle Frequency-to-Voltage Needs
... The LM331 can handle frequencies up to 100 kHz by utilizing smaller-value capacitors as shown in Figure 5 . This circuit increases the current at pin 2 to facilitate high-speed switching, but, despite these speed-ups, the LM331’s 500 ppm/§ C TC at 100 kHz causes problems because of switching speed s ...
... The LM331 can handle frequencies up to 100 kHz by utilizing smaller-value capacitors as shown in Figure 5 . This circuit increases the current at pin 2 to facilitate high-speed switching, but, despite these speed-ups, the LM331’s 500 ppm/§ C TC at 100 kHz causes problems because of switching speed s ...
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.