ADT7463ARQZ ON Semiconductor, ADT7463ARQZ Datasheet - Page 41

• Manufacturer Part Number: ADT7463ARQZ
• Description: IC REMOTE THERMAL CTRLR 24-QSOP
• Manufacturer: ON Semiconductor
• Series: dBCool®r

Specifications of ADT7463ARQZ

• Function: Fan Control, Temp Monitor
• Topology: ADC, Comparator, Fan Speed Counter, Multiplexer, Register Bank
• Sensor Type: External & Internal
• Sensing Temperature: -40°C ~ 120°C, External Sensor
• Output Type: SMBus™
• Output Alarm: No
• Output Fan: Yes
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 120°C
• Mounting Type: Surface Mount
• Package / Case: 24-QSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Register Address
0x5C
0x5D
0x5E
Bit
<2:0>
<3>
<4>
<7:5>
*These registers become read-only when the Configuration Register 1 Lock bit is set to 1. Any subsequent attempts to write to these registers fail.
REV. C
Name
SPIN
SLOW
INV
BHVR
R/W*
Read/Write
Read/Write
Read/Write
R/W
Read/Write
Read/Write
Read/Write
Read/Write
Description
PWM1 Configuration
PWM2 Configuration
PWM3 Configuration
Description
These bits control the startup timeout for PWMx. The PWM output stays high until two
valid TACH rising edges are seen from the fan. If there is not a valid TACH signal during the
fan TACH measurement directly after the fan startup timeout period, then the TACH
measurement reads 0xFFFF and Status Register 2 reflects the fan fault. If the TACH
Minimum High and Low Byte contains 0xFFFF or 0x0000, then the Status Register 2
Bit is not set, even if the fan has not started.
000 = No Startup Timeout.
001 = 100 ms.
010 = 250 ms (Default).
011 = 400 ms.
100 = 667 ms.
101 = 1 s.
110 = 2 s.
111 = 4 s.
Slow = 1 makes the ramp rates for acoustic enhancement four times longer.
This bit inverts the PWM output. The default is 0, which corresponds to a logic high
output for 100% duty cycle. Setting this bit to 1 inverts the PWM output, so 100% duty
cycle corresponds to a logic low output.
These bits assign each fan to a particular temperature sensor for localized cooling.
000 = Remote 1 Temp Controls PWMx (Automatic Fan Control Mode).
001 = Local Temp Controls PWMx (Automatic Fan Control Mode).
010 = Remote 2 Temp Controls PWMx (Automatic Fan Control Mode).
011 = PWMx Runs Full Speed (Default).
100 = PWMx Disabled.
101 = Fastest Speed Calculated by Local and Remote 2 Temp Controls PWMx.
110 = Fastest Speed Calculated by All 3 Temperature Channels Controls PWMx.
111 = Manual Mode. PWM Duty Cycle Registers (Reg 0x30 to 0x32) Become Writable.
Table XIX. PWM Configuration Registers
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Power-On Default
0x62
0x62
0x62
ADT7463