EMC6D103S-CZC-TR SMSC, EMC6D103S-CZC-TR Datasheet - Page 69

• Manufacturer Part Number: EMC6D103S-CZC-TR
• Description: Industrial Temperature Sensors Auto Fan Contrllr Up to 4 Fans
• Manufacturer: SMSC

Specifications of EMC6D103S-CZC-TR

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Fan Control Device with High Frequency PWM Support and Hardware Monitoring Features
Datasheet
SMSC EMC6D103
Example for PWM1 assigned to Zone 1:
In this case, the PWM1 duty cycle will be 50% at 50 ° C.
Since (Zone 1 Low Temp Limit) + (Zone 1 Range) = 50 ° C + 8 ° C = 58 ° C, the fan controlled by PWM1
will run at 100% duty cycle when the temperature of the Zone 1 sensor is at 58 ° C.
Since the midpoint of the fan control range is 54 ° C, and the median duty cycle is 75% (Halfway
between the PWM Minimum and 100%), PWM1 duty cycle would be 75% at 54 ° C.
Above (Zone 1 Low Temp Limit) + (Zone 1 Range), the duty cycle must be 100%.
The PWM frequency bits [3:0] determine the PWM frequency for the fan.
PWM Frequency Selection (Default =0011=29.3Hz)
Range Selection (Default =1100=32 ° C)
Zone 1 Low Temp Limit (Register 67h) is set to 50 ° C (32h).
Zone 1 Range (Register 5Fh) is set to 8 ° C (7h)
PWM1 Minimum Duty Cycle (Register 64h) is set to 50% (80h)
Table 8.30 Register Setting vs. Temperature Range
Table 8.29 Register Setting vs. PWM Frequency
1000 - 1001
1011 - 1111
FREQ[3:0]
RAN[3:0]
0000
0001
0010
0011
0100
0101
0110
1010
0000
0001
0010
0011
0100
0101
0110
0111
DATASHEET
PWM FREQUENCY
69
29.3 Hz (default)
RANGE ( ° C)
~25 Khz
11.0 Hz
14.6 Hz
21.9 Hz
35.2 Hz
44.0 Hz
58.6 Hz
87.7 Hz
3.33
6.67
N/A
N/A
2.5
2
4
5
8
Revision 0.3 (03-01-07)