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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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TC642 数据表(PDF) 8 Page - Microchip Technology |
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TC642 数据表(HTML) 8 Page - Microchip Technology |
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8 / 28 page  TC642 DS21444C-page 8 2002 Microchip Technology Inc. FIGURE 4-1: TC642 Behavioral Algorithm Flowchart. FAULT = 0, VOUT = 0 Cycling Power? VMIN < VSHDN? Yes Yes Yes No No Fan Fault Power-up VMIN > VREL? Fan Fault Detected? Fan Pulse Detected? VMIN < VSHDN Shutdown VOUT = 0 Yes No No Yes Yes Power-Up Normal Operation Fan Fault YES Power-on Reset FAULT = 1 VMIN > VREL? No Fire Start-up Timer (1 SEC) Fire Start-up Timer (1 SEC) VMIN > VREL Yes Fan Fault Clear Missing Pulse Detector VOUT Proportional to Greater of VIN or VMIN VMIN < VSHDN? VIN > VOTF? M.P.D. Expired? Fan Pulse Detected? No No No No No No Yes Yes Yes Normal Operaton Power-up Yes FAULT = 0 Yes Fire Diagnostic Timer (100msec) Fan Pulse Detected? Fan Pulse Detected? Fire Start-up Timer (1 SEC) Yes No Shutdown VOUT = 0 No Yes No |
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