EMC2305-1-AP-TR SMSC, EMC2305-1-AP-TR Datasheet - Page 42

• Manufacturer Part Number: EMC2305-1-AP-TR
• Description: Industrial Temperature Sensors Penta RPM-Based PWN Fan Speed Controller
• Manufacturer: SMSC

Specifications of EMC2305-1-AP-TR

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

Revision 1.2 (03-22-10)
2
0
0
0
0
1
1
1
1
Bits 4 - 2 - SPIN_LVLx[2:0] - Determines the final drive level that is used by the Spin Up Routine as
shown in
Bit 1 -0 - SPINUP_TIMEx[1:0] - determines the maximum Spin Time that the Spin Up Routine will run
for (see
elapsed, then an interrupt will be generated. When the RPM-based Fan Speed Control Algorithm is
active, the fan driver will attempt to re-start the fan immediately after the end of the last spin up attempt.
The Spin Time is set as shown in
1
0
0
1
1
‘1’ - The Spin Up Routine will not drive the fan driver to 100%. It will set the drive at the
programmed spin level for the entire duration of the programmed spin up time.
Section
SPINUP_TIMEX[1:0]
SPIN_LVLX[2:0]
Table
5.21.
4.6). If a valid tachometer measurement is not detected before the Spin Time has
1
0
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1
1
0
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1
1
Table 5.21 Spin Level
Table 5.22 Spin Time
Table
DATASHEET
0
0
1
0
1
0
0
1
0
1
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1
0
1
5.22.
42
Multiple RPM-Based PWM Fan Controller for Five Fans
SPIN UP DRIVE LEVEL
TOTAL SPIN UP TIME
60% (default)
500 ms (default)
30%
35%
40%
45%
50%
55%
65%
250 ms
1 sec
2 sec
SMSC EMC2305
Datasheet