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TC646VUA 데이터시트(PDF) 9 Page - Microchip Technology |
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TC646VUA 데이터시트(HTML) 9 Page - Microchip Technology |
9 / 28 page 2002 Microchip Technology Inc. DS21446C-page 9 TC646 FIGURE 4-1: TC646 Behavioral Algorithm Flowchart. Auto-Shutdown FAULT = 1 VOUT = 0 Cycling Power Yes Yes No No No No Yes Power-Up VIN > VREL ? Fan Pulse Detected? VIN < VSHDN? VIN < VAS? Shutdown VOUT = 0 Auto- Shutdown VOUT = 0 Yes No No No Yes Yes Power-Up Normal Operation YES Power-on Reset FAULT = 1 VIN > VREL? No VIN > (VAS + VHAS) Yes Yes No Hot Start Fire Start-up Timer (1 SEC) Fan Pulse Detected? No Yes Fan Fault Fire Start-up Timer (1 SEC) VIN > VREL Yes FAULT = 0, VOUT = 0 VIN < VSHDN ? Yes Fan Fault Clear Missing Pulse Detector VOUT Proportional to VIN VIN < VSHDN? VIN < VAS? VIN > VOTF? M.P.D. Expired? Fan Pulse Detected? Shutdown VOUT = 0 Auto Shutdown VOUT = 0 No No No No No No Yes Yes Yes Yes Normal Operation Power-Up VIN > (VAS + VHAS) No Yes Hot Start Yes No FAULT = 0 Yes Fire Diagnostic Timer (100msec) Fan Pulse Detected? Fire Start-up Timer (1 sec) Fan Fault Fan Pulse Detected? Yes No VIN > (VAS + VHAS)? |
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