ADT7473ARQZ-1REEL7 ON Semiconductor, ADT7473ARQZ-1REEL7 Datasheet - Page 64
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ADT7473ARQZ-1REEL7
Manufacturer Part Number
ADT7473ARQZ-1REEL7
Description
IC THERM MON FAN CTRLR 16-QSOP
Manufacturer
ON Semiconductor
Series
dBCool®r
Datasheet
1.ADT7473ARQZ-1RL.pdf
(74 pages)
Specifications of ADT7473ARQZ-1REEL7
Function
Fan Control, Temp Monitor
Topology
ADC, Comparator, Fan Speed Counter, Multiplexer, Register Bank
Sensor Type
External & Internal
Sensing Temperature
-40°C ~ 125°C, External Sensor
Output Type
SMBus™
Output Alarm
No
Output Fan
Yes
Voltage - Supply
3 V ~ 3.6 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
16-QSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Table 35. Register 0x5F, Register 0x60, and Register 0x61 — TEMP T
(Power−On Default = 0xCC)
Bit No.
[2:0]
[7:4]
[3]
Mnemonic
RANGE
FREQ
HF/LF
R/W
R/W
R/W
R/W
Bit Code
000
001
010
011
100
101
110
111
These bits control the PWMx frequency.
HF/LF = 1, high frequency PWM output for 4−wire fans. Once enabled, 3−wire fan−specific
settings have no effect.
0x5F, HF/LF = 1, enables high frequency mode for Fan 1.
0x60, HF/LF = 1, enables high frequency mode for Fan 2.
0x61, HF/LF = 1, enables high frequency mode for Fan 3.
These bits determine the PWM duty cycle vs. the temperature slope for automatic fan control.
Bit Code
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
http://onsemi.com
64
RANGE
Description
Frequency
Temperature
11.0 Hz
14.7 Hz
22.1 Hz
29.4 Hz
35.3 Hz (default)
44.1 Hz
58.8 Hz
88.2 Hz
2°C
2.5°C
3.33°C
4°C
5°C
6.67°C
8°C
10°C
13.33°C
16°C
20°C
26.67°C
32°C (default)
40°C
53.33°C
80°C
/PWM Frequency Registers,
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