ADT7462ACPZ-REEL ON Semiconductor, ADT7462ACPZ-REEL Datasheet - Page 69

• 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 = 0x90, Lock = Y, SW Reset = Y.
Table 58. Register 0x21, Register 0x22, Register 0x23, Register 0x24 — PWM1, PWM2, PWM3 and PWM4
Configuration Registers
Table 59. Register 0x25 — PWM1, PWM2 Frequency
[2:0]
[7:5]
[4:2]
[7:5]
Bit
Bit
3
4
0
1
Low Freq 1
Low Freq 2
Spin−Up
Timeout
SLOW
Name
BHVR
Name
Min 1
Min 2
INV
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
These bits set the duration of the fan startup timeout and the timeout for the fan freewheeling
test.
Setting this bit to 1 makes the ramp rate of the enhance acoustics mode four times longer.
Setting this bit to 0, the PWM outputs are active low. Setting this bit to 1, the PWM outputs are
active high (default).
These bits determine which temperature channel controls the fans in the automatic fan speed
control loop.
When the ADT7462 is in automatic fan control mode, this bit defines whether PWM1 is off
(0% duty cycle) or at minimum PWM1 duty cycle when the controlling temperature is below its
T
0 = 0% duty cycle below T
T
When the ADT7462 is in automatic fan control mode, this bit defines whether PWM2 is off
(0% duty cycle) or at minimum PWM2 duty cycle when the controlling temperature is below its
T
0 = 0% duty cycle below T
T
These bits set the frequency of PWM1 when configured in low frequency mode.
These bits set the frequency of PWM2 when configured in low frequency mode.
MIN
MIN
MIN
MIN
000 = No startup timeout
001 = 100 ms
010 = 250 ms
011 = 400 ms
100 = 667 ms
101 = 1 sec
110 = 2 sec
111 = 32 sec
000 = Local temperature
001 = Remote 1 temperature
010 = Remote 2 temperature
011 = Remote 3 temperature
100 = Off
101 = Maximum fan speed calculated by the local and Remote 3 temperature channels
110 = Maximum fan speed calculated by all four channels
111 = Manual mode
000 = 11 Hz
001 = 14.7 Hz
010 = 22.1 Hz
011 = 29.4 Hz
100 = 35.3 Hz (default)
101 = 44.1 Hz
110 = 58.8 Hz
111 = 88.2 Hz
000 = 11 Hz
001 = 14.7 Hz
010 = 22.1 Hz
011 = 29.4 Hz
100 = 35.3 Hz (default)
101 = 44.1 Hz
110 = 58.8 Hz
111 = 88.2 Hz
− hysteresis value.
− hysteresis.
− hysteresis value.
− hysteresis.
http://onsemi.com
(Note 1)
69
MIN
MIN
− hysteresis (default); 1 = minimum PWM1 duty cycle below
− hysteresis (default); 1 = minimum PWM2 duty cycle below
Description
Description