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lx1992 high efficiency boost led driver
lx1992 high efficiency boost led driver

... and cost. The LX1992 features a pseudo-hysteretic pulse frequency modulation topology and uses an external N-Channel MOSFET. Further, the LX1992 features control circuitry that is optimized for portable systems (e.g., quiescent supply current of 80µA (typ) and a shutdown current of less than 1µA). T ...
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No Slide Title

...  High speed DACs are defined as operating at greater than 1 MHz.  Some state of the art 12-16 bit DAC can reach speeds of 1GHz  The conversion of the digital input signal is limited by the clock speed of the microprocessor and the settling time of the DAC. ...
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... the motor winding. Motor are designed for 60 hz use have synchronous speeds of 3600, 1800, 1200, 900, 720, 600, 514, and 450 rpm. To calculate synchronous speed of an induction motor, apply this formula: rpmsyn = 120 x f Np rpmsyn = synchronous speed (in rpm) f = supply frequency in (cycles/sec) Np ...
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... 1. These settings are not to be used in UL Listed applications and should be used in non-UL Listed applications only when the audio input level is not at the rated value – 0.5 V RMS for the 0.5-V mode and 25 V RMS for the 25-V mode – to provide 3- or 6-dB compensation for line losses and/or low driv ...
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... more information capacity with varieties of 3G cellular phone services, higher data security, better quality of services (QoS), and quicker system availability. The high level M-ary modulation schemes, like 8PSK, 16QAM, and so on, have a greater capacity to convey large amounts of information than l ...
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Power electronics



Power electronics is the application of solid-state electronics to the control and conversion of electric power. It also refers to a subject of research in electronic and electrical engineering which deals with the design, control, computation and integration of nonlinear, time-varying energy-processing electronic systems with fast dynamics.The first high power electronic devices were mercury-arc valves. In modern systems the conversion is performed with semiconductor switching devices such as diodes, thyristors and transistors, pioneered by R. D. Middlebrook and others beginning in the 1950s. In contrast to electronic systems concerned with transmission and processing of signals and data, in power electronics substantial amounts of electrical energy are processed. An AC/DC converter (rectifier) is the most typical power electronics device found in many consumer electronic devices, e.g. television sets, personal computers, battery chargers, etc. The power range is typically from tens of watts to several hundred watts. In industry a common application is the variable speed drive (VSD) that is used to control an induction motor. The power range of VSDs start from a few hundred watts and end at tens of megawatts.The power conversion systems can be classified according to the type of the input and output power AC to DC (rectifier) DC to AC (inverter) DC to DC (DC-to-DC converter) AC to AC (AC-to-AC converter)
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