Dual RPM-Based PWM Fan Controller with Hardware Thermal Shutdown
Datasheet
Table 3.2 Electrical Specifications (continued)
VDD = 3V to 3.6V, VDD_5V = 4.5V to 5.5V, TA = -40°C to 85°C, all Typical values at TA = 27°C unless otherwise
noted.
CHARACTERISTIC
SYMBOL
MIN
TYP
MAX
UNIT
CONDITIONS
Supply Current from
VDD_5V
IDD_5
100
uA
Fan Driver enabled, No load
current
External Temperature Monitors
Temperature
Accuracy
60°C < TDIODE < 110°C
30°C < TDIE < 85°C
±0.25
±0.5
±1
±2
°C
°C
0°C < TDIODE < 125°C,
0°C < TDIE < 115°C
Temperature
Resolution
0.125
2200
°C
Diode decoupling
capacitor
Connected across external
diode, CPU, GPU, or AMD diode
CFILTER
RSERIES
2700
100
pF
Resistance Error
Corrected
Sum of series resistance in both
DP and DN lines
Ohm
Internal Temperature Monitor
Temperature
Accuracy
TDIE
±1
±2
°C
°C
Temperature
Resolution
0.125
Voltage Measurement
1
Total Unadjusted
Error
Measured at 3/4 full scale
TUE
%
Reference Voltage
Reference Accuracy
VREF
800
mV
%
ΔVREF
1
PWM Fan Driver
PWM Resolution
PWM Duty Cycle
PWM
256
Steps
%
DUTY
0
100
RPM Based Fan Controller
Tachometer Range
TACH
480
16000
±2
RPM
%
Tachometer Setting
Accuracy
ΔTACH
±1
External oscillator 32.768kHz
Internal Oscillator
40°C < TDIE < 100°C
ΔTACH
±2.5
±5
%
Digital I/O pins
Input High Voltage
Input Low Voltage
VIH
VIL
2.0
V
V
0.8
SMSC EMC2104
Revision 1.74 (05-08-08)
DATA1S5HEET
SMSC [ SMSC CORPORATION ]
