ADT7468 Datasheet, PDF (36/81 Pages) Analog Devices – dBCool™ Remote Thermal Controller and Voltage Monitor

ADT7468
ADT7468 IS POWERED UP
HAS THE ADT7468 BEEN
ACCESSED BY A VALID
Y
SMBUS TRANSACTION?
N
IS V_CCP ABOVE 0.75V?
N
Y
START FAIL-SAFE TIMER
CHECK V_CCP
HAS THE ADT7468 BEEN
ACCESSED BY A VALID
Y
SMBUS TRANSACTION?
N
FAIL-SAFE TIMER ELAPSES
AFTER THE FAIL-SAFE TIMEOUT
HAS THE ADT7468 BEEN
ACCESSED BY A VALID
SMBUS TRANSACTION?
Y
START UP THE
ADT7468 NORMALLY
RUN THE FANS TO FULL SPEED
N
HAS THE ADT7468 BEEN
N
ACCESSED BY A VALID
SMBUS TRANSACTION?
Y
SWITCH OFF FANS
Figure 48. Power-On Flow Chart
Rev. 3 | Page 36 of 81 | www.onsemi.com