Practical Lighting Design with LEDs (IEEE Press Series on Po

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Practical Lighting Design with LEDs (IEEE Press Series on Po

Post by IBMAcer » Sun Aug 28, 2011 4:45 am

Author(s): Ron Lenk
Publisher: Wiley-IEEE Press
Date: 2011-05-03 Format: PDF Language: English ISBN10: 0470612797
Pages: 272 OCR: Quality: ISBN13: 9780470612798

Product Description: This book covers all of the information needed to design LEDs into end-products. It is a practical guide, primarily explaining how things are done by practicing engineers. Equations are used only for practical calculations, and are kept to the level of high-school algebra. There are numerous drawings and schematics showing how things such as measurements are actually made, and showing curcuits that actually work. There are practical notes and examples embedded in the text that give pointers and how-to guides on many of the book's topics. After reading each chapter of the book, readers will have the knowledge to implement practical designs. This book will be kept as a reference tool for years to come. ... g.pdf.html

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Re: Practical Lighting Design with LEDs (IEEE Press Series o

Post by CoMod » Sun Aug 28, 2011 9:21 am

!!! HV9910B and improved HV9961 are generic disease and can be burned at any time
The first batch of devices worked normally.
The second batch turned out to be unworkable 50/50%, some chips in the moments of transition phase through a 0 "crazy" - do not turn off the transistor.
The result - increase in the current situation and the excercise of "short-circuit at the output."
Thus, the LEDs start to flicker.
HV9910B и улучшенный HV9961 имеют родовую болезнь и могут сгореть в любой момент
Первая партия устройств работала нормально.
Вторая партия оказалась неработоспособной 50/50%: некоторые микросхемы в моменты перехода фазы через 0 "сходят с ума" - не выключают транзистор. Результат - рост тока и отрабатывание ситуации "КЗ на выходе". Таким образом, светодиоды начинают мерцать.

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