RPM-Based Fan Controller with HW Thermal Shutdown
Datasheet
3.1
Electrical Specifications
Table 3.2 Electrical Specifications
VDD = 3V to 3.6V, TA = -40°C to 125°C, all Typical values at TA = 27°C unless otherwise noted.
CHARACTERISTIC
SYMBOL
MIN
TYP
MAX
UNIT
CONDITIONS
DC Power
3.3
Supply Voltage
Supply Current
VDD
3
3.6
1.8
V
4 Conversions / second, Fan
Driver active at maximum PWM
frequency, Dynamic Averaging
Enabled (EMC2103-2)
1.3
1
mA
4 Conversions / second, Fan
Driver active at maximum PWM
frequency, Dynamic Averaging
Enabled (EMC2103-1)
IDD
1.5
mA
1 Conversions / second, Fan
Driver not active, Dynamic
Averaging Disabled
450
300
10
750
uA
ms
ms
First Conversion
Ready
Time after power up before all
channels updated
tCONV_T
Time before SMBus
communications should be sent
by host
SMBus Delay
tSMB_D
External Temperature Monitors
60°C < TDIODE < 125°C
30°C < TA < 100°C
±0.5
±1
±1
±2
°C
°C
°C
Temperature
Accuracy
-40°C < TDIODE < 125°C
Temperature
Resolution
0.125
Diode decoupling
capacitor
Connected across external
CFILTER
2200
100
2700
pF
diode, CPU, GPU, or AMD diode
Resistance Error
Corrected
Sum of series resistance in both
DP and DN lines
RSERIES
Ohm
Internal Temperature Monitor
Temperature
Accuracy
TDIE
±1
±2
°C
°C
Temperature
Resolution
0.125
PWM Fan Driver
256
PWM Resolution
PWM Duty Cycle
PWM
Steps
%
DUTY
0
100
TRIP_SET Measurement
0.5
Voltage Accuracy
VTRIP
1
%
Revision 0.85 (01-29-08)
SMSC EMC2103
DATA1S4HEET
SMSC [ SMSC CORPORATION ]
