ADT7462ACPZ-REEL ON Semiconductor, ADT7462ACPZ-REEL Datasheet - Page 63

• Manufacturer Part Number: ADT7462ACPZ-REEL
• Description: IC TEMP/VOLT MONITOR 32-LFCSP
• Manufacturer: ON Semiconductor

Specifications of ADT7462ACPZ-REEL

• Function: Fan Control, Temp Monitor
• Topology: ADC, Comparator, 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 ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 32-LFCSP
• Number Of Voltages Monitored: 1
• Monitored Voltage: 0.9 V to 12 V
• Manual Reset: Not Resettable
• Watchdog: No Watchdog
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 3 V
• Supply Current (typ): 4000 uA
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

1. POR = 0x40, Lock = Y, SW Reset = Y.
1. POR = 0x00, Lock = Y, SW Reset = Y.
Table 40. Register 0x0C — Dynamic T
Table 41. Register 0x0D — THERM Configuration Register
[2:0]
[5:3]
[4:2]
[7:5]
Bit
Bit
6
7
0
1
THERM1 Timer
THERM2 Timer
Control Loop
Reserved
Window
Window
Boost 1
Boost 2
Name
Select
Name
CYR1
CYR2
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R
Three−bit Remote 1 cycle value. These three bits define the delay time between making
subsequent T
terms of number of monitoring cycles. The system has associated thermal time constants that
must be found to optimize the response of fans and the control loop.
Three−bit Remote 2 cycle value. These three bits define the delay time between making
subsequent T
terms of number of monitoring cycles. The system has associated thermal time constants that
must be found to optimize the response of fans and the control loop.
This bit allows the user to select between two control loops. 0 makes the control loop
backwards compatible with the ADT7463 and ADT7468. 1 = ADT7462 control loop (default).
Reserved for future use.
Setting this bit to 0 causes the fans to go to maximum PWM on assertion of THERM1 as an
output. Setting this bit to 1 means that the fan speed is not affected when the THERM1
temperature limit is exceeded. Default = 0.
Setting this bit to 0 causes the fans to go to maximum PWM on assertion of THERM2 as an
output. Setting this bit to 1 means that the fan speed is not affected when the THERM2
temperature limit is exceeded. Default = 0.
These bits set the timer window for measuring THERM1 assertions.
These bits set the timer window for measuring THERM2 assertions.
000 = 0.25 sec
010 = 1 sec
100 = 4 sec
110 = 8 sec
000 = 0.25 sec
010 = 1 sec
100 = 4 sec
110 = 8 sec
Bits
Bits
000
001
010
100
101
000
001
010
100
101
011
110
111
011
110
111
MIN
Control Register 2
MIN
MIN
http://onsemi.com
adjustments in the control loop for the Remote 1 temperature channel, in
adjustments in the control loop for the Remote 2 temperature channel, in
1024 cycles (128 sec)
1024 cycles (128 sec)
128 cycles (16 sec)
256 cycles (32 sec)
512 cycles (64 sec)
128 cycles (16 sec)
256 cycles (32 sec)
512 cycles (64 sec)
16 cycles (2 sec)
32 cycles (4 sec)
64 cycles (8 sec)
16 cycles (2 sec)
32 cycles (4 sec)
64 cycles (8 sec)
Decrease cycle
Decrease cycle
8 cycles (1 sec)
8 cycles (1 sec)
63
(Note 1)
(Note 1)
001 = 0.5 sec
011 = 2 sec
101 = 8 sec
111 = 8 sec
001 = 0.5 sec
011 = 2 sec
101 = 8 sec
111 = 8 sec
Description
Description
1024 cycles (128 sec)
2048 cycles (256 sec)
1024 cycles (128 sec)
2048 cycles (256 sec)
128 cycles (16 sec)
256 cycles (32 sec)
512 cycles (64 sec)
128 cycles (16 sec)
256 cycles (32 sec)
512 cycles (64 sec)
16 cycles (2 sec)
32 cycles (4 sec)
64 cycles (8 sec)
16 cycles (2 sec)
32 cycles (4 sec)
64 cycles (8 sec)
Increase Cycle
Increase cycle