RPM-Based Fan Controller with HW Thermal Shutdown
Datasheet
3.1
Electrical Specifications
Table 3.2 Electrical Specifications
VDD = 3V to 3.6V, T
A
= -40°C to 125°C, all Typical values at T
A
= 27°C unless otherwise noted.
CHARACTERISTIC
SYMBOL
MIN
TYP
MAX
UNIT
CONDITIONS
DC Power
Supply Voltage
V
DD
3
3.3
3.6
V
4 Conversions / second, Fan
Driver active at maximum PWM
frequency, Dynamic Averaging
Enabled (EMC2103-2)
4 Conversions / second, Fan
Driver active at maximum PWM
frequency, Dynamic Averaging
Enabled (EMC2103-1)
1 Conversions / second, Fan
Driver not active, Dynamic
Averaging Disabled
Time after power up before all
channels updated
Time before SMBus
communications should be sent
by host
1.3
1.8
mA
Supply Current
I
DD
1
1.5
mA
450
First Conversion
Ready
SMBus Delay
750
uA
t
CONV_T
300
ms
t
SMB_D
10
External Temperature Monitors
ms
Temperature
Accuracy
Temperature
Resolution
Diode decoupling
capacitor
Resistance Error
Corrected
C
FILTER
R
SERIES
±0.5
±1
0.125
2200
100
±1
±2
°C
°C
°C
60°C < T
DIODE
< 125°C
30°C < T
A
< 100°C
-40°C < T
DIODE
< 125°C
2700
pF
Ohm
Connected across external
diode, CPU, GPU, or AMD diode
Sum of series resistance in both
DP and DN lines
Internal Temperature Monitor
Temperature
Accuracy
Temperature
Resolution
T
DIE
±1
0.125
PWM Fan Driver
PWM Resolution
PWM Duty Cycle
PWM
DUTY
0
256
100
TRIP_SET Measurement
Voltage Accuracy
Revision 0.85 (01-29-08)
±2
°C
°C
Steps
%
V
TRIP
0.5
14
1
%
SMSC EMC2103
DATASHEET
SMSC [ SMSC CORPORATION ]
