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AS3492 датащи(PDF) 13 Page - ams AG |
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AS3492 датащи(HTML) 13 Page - ams AG |
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13 / 19 page ![]() www.austriamicrosystems.com/AS3492 1.2 12 - 18 AS3492 Datasheet - D e ta i l e d D e s c r i p t i o n Figure 18. Single Open LED detection Figure 19. All LEDs open Protection and Fault Detection Functions The protection functions protect the AS3492, its external components and connected LEDs against physical damage. Overvoltage Protection The voltage on VOUT is kept below or at VVOUT_MAX under every operating condition 6. If the voltage on VOUT is at VVOUT_MAX for more than 70ms 7, the DCDC will shutdown. It can be re-enabled by setting ON13 and ON45 to low for more than tTIMEOUT. 6. When reaching VOUT=VVOUT_OPENLED, the open LED detection is performed. 7. The duration can vary from 55ms to 85ms within a single AS3492. ! "#$# ! ### %& '( ) ! ! * ! (( &+ ! ( ! ,-. "#/ 0+,-.+-1 & ! ### ( 2 ' " (3( ' (" ( ! ! " " # $ % & ' ( )" * $ + ,) - $) '. !/ )" 0 (1#'. !/ '#!2 |
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