ADT7473ARQZ-1RL ON Semiconductor, ADT7473ARQZ-1RL Datasheet - Page 64

• Manufacturer Part Number: ADT7473ARQZ-1RL
• Description: IC REMOTE THERMAL CTLR 16QSOP
• Manufacturer: ON Semiconductor
• Series: dBCool®r

Specifications of ADT7473ARQZ-1RL

• 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
• Full Temp Accuracy: +/- 0.5 C
• Digital Output - Bus Interface: Serial (3-Wire, 4-Wire)
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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
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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,