MAX34441ETL+ Maxim Integrated Products, MAX34441ETL+ Datasheet - Page 48

• Manufacturer Part Number: MAX34441ETL+
• Description: Supervisory Circuits PMBUS 5-CH POW-SUPPLY MANAGER & INTELLIGENT FAN CONTLR
• Manufacturer: Maxim Integrated Products

Specifications of MAX34441ETL+

• Internal Hysteresis: Yes
• Operating Temperature Range: - 40 C to + 85 C
• Output Type: Push-Pull
• Number Of Voltages Monitored: 5
• Watchdog: Yes
• Supply Voltage (max): 3.3 V
• Supply Current (typ): 8 A
• Maximum Power Dissipation: 2857.1 mW
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: + 85 C
• Package / Case: TQFN-40
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PMBus 5-Channel Power-Supply Manager
and Intelligent Fan Controller
The MFR_FAN_LUT command is used to configure the LUT that controls the fan. The fan has an LUT that maps eight
programmable temperature levels to eight programmable fan PWM duty-cycle levels (bit 6 in FAN_CONFIG_1_2 is
zero) or eight programmable target fan speeds (bit 6 in FAN_CONFIG_1_2 is one). The LUT allows a wide variety of
profiles to be used.
USER NOTE: The programmable configuration of MFR_FAN_LUT must be monotonic.
Table 33. MFR_FAN_LUT
Table 34. Valid Temperature Range
48
The TEMPERATURE STEP sets the temperature in degrees Celsius and represents a threshold level at which the
device updates the fan PWM duty cycle setting. The 2 data bytes are in DIRECT format. The valid temperature range
depends on the temperature sensor.
Page 6: Internal Temp Sensor
Pages 7 to 10: I
Page 11: Remote Thermal Diode Temp Sensor
BYTE NUMBER
10-11
12-13
14-15
16-17
18-19
20-21
22-23
24-25
26-27
28-29
30-31
0-1
2-3
4-5
6-7
8-9
2
C Remote Temp Sensor
TEMPERATURE SENSOR
SPEED STEP 0
SPEED STEP 1
SPEED STEP 2
SPEED STEP 3
SPEED STEP 4
SPEED STEP 5
SPEED STEP 6
SPEED STEP 7
WORD NAME
TEMP STEP 0
TEMP STEP 1
TEMP STEP 2
TEMP STEP 3
TEMP STEP 4
TEMP STEP 5
TEMP STEP 6
TEMP STEP 7
TEMPERATURE STEP: Temperature Level Setting
Temperature for step 0.
Fan PWM duty cycle or fan speed for step 0.
Temperature for step 1.
Fan PWM duty cycle or fan speed for step 1.
Temperature for step 2.
Fan PWM duty cycle or fan speed for step 2.
Temperature for step 3.
Fan PWM duty cycle or fan speed for step 3.
Temperature for step 4.
Fan PWM duty cycle or fan speed for step 4.
Temperature for step 5.
Fan PWM duty cycle or fan speed for step 5.
Temperature for step 6.
Fan PWM duty cycle or fan speed for step 6.
Temperature for step 7.
Fan PWM duty cycle or fan speed for step 7.
-55NC to +125NC
-40NC to +120NC
VALID RANGE
-40NC to +85NC
MEANING
MFR_FAN_LUT (F2h)