RPM-Based Fan Controller with HW Thermal Shutdown
Datasheet
Chapter 1 Block Diagram
VDD_5V
SMCLK
SMBus
Slave
Protocol
TRIP_SET
Reset
Generator
Critical / Thermal
Shutdown Logic
SMDATA
ALERT#
DP1
DN1
External
DP2
Temp
Ext Temp
Limit
DN2
Diodes
Analog
Registers
Mux
DP3
DN3
POWER_OK
11 bit Σ Δ
ADC
Ext. Temp Registers
Voltage Reading
Internal
Temp
Diode
Bandgap
Register
Set and
Logic
Reference
Voltage ->
Temperature
Converison
Automatic
Fan Control
Algorithms
8-bit DAC
High Side
Fan Driver
TACH
Monitor
FAN_MODE
Figure 1.1 EMC2102 Block Diagram
SMSC EMC2102
7
Revision 1.95 (10-19-06)
DATASHEET