LM96194CISQ/NOPB National Semiconductor, LM96194CISQ/NOPB Datasheet - Page 30

• Manufacturer Part Number: LM96194CISQ/NOPB
• Description: IC TRUTHERM HDWR MONITOR 48-LLP
• Manufacturer: National Semiconductor
• Series: PowerWise®, TruTherm®r

Specifications of LM96194CISQ/NOPB

• Function: Fan Control, Temp Monitor
• Topology: ADC (Sigma Delta), Comparator, Fan Control, Multiplexer, Register Bank
• Sensor Type: External & Internal
• Sensing Temperature: -40°C ~ 85°C, External Sensor
• Output Type: SMBus™
• Output Alarm: No
• Output Fan: Yes
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 48-LLP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LM96194CISQTR

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15.10.2 Alternate LUT PWM Mapping
The PWM output can operate at lower frequencies, instead of
the default 22.5 kHz. The lower frequencies can be enabled
through the PWMx Control 4 registers. Operating in the lower
frequency mode, enables an alternate mapping of step num-
bers to duty cycle. This effects the auto fan control and all
LM96194 registers that describe a duty cycle using a 4-bit
value. This alternate mapping can also be enable when using
the default 22.5 kHz PWM frequency.
The alternate LUT PWM duty cycle mapping is listed in the
following table:
FIGURE 6. LUT and PI controller high level block diagram
30
4-Bit Value
0h
1h
2h
3h
4h
5h
6h
7h
LUT Step
1
2
3
4
5
6
7
Alternate LUT
Duty Cycle
25.00%
28.57%
32.14%
35.71%
39.29%
42.86%
46.43%
0%
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