EVAL-ADT7467EBZ ON Semiconductor, EVAL-ADT7467EBZ Datasheet - Page 42

• Manufacturer Part Number: EVAL-ADT7467EBZ
• Description: BOARD EVALUATION FOR ADT7467
• Manufacturer: ON Semiconductor
• Series: dBCool®r

Specifications of EVAL-ADT7467EBZ

• Sensor Type: Temperature
• Sensing Range: -40°C ~ 120°C
• Interface: SMBus (2-Wire/I²C)
• Sensitivity: ±1.5°C
• Voltage - Supply: 3 V ~ 5.5 V
• Embedded: No
• Utilized Ic / Part: ADT7467
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ADT7467
STEP 3: T
CALIBRATION CHANNELS
T
using automatic fan control mode. The speed at which the fan
runs at T
temperature-channel specific, for example, 25°C for ambient
channel, 30°C for VRM temperature, and 40°C for processor
temperature.
T
can be programmed in 1°C increments. There is a T
associated with each temperature measurement channel:
Remote 1, local, and Remote 2 temperature. Once the T
value is exceeded, the fan turns on and runs at the minimum
PWM duty cycle. The fan turns off once the temperature has
dropped below T
To overcome fan inertia, the fan spins up until two valid TACH
rising edges are counted. See the Fan Start-Up Timeout section
for more details. In some cases, primarily for psychoacoustic
reasons, it is desirable that the fan never switch off below T
When set, Bits <7:5> of the Enhanced Acoustics Register 1
MIN
MIN
is the temperature at which the fans start to turn on when
is an 8-bit value, either twos complement or Offset 64, that
MIN
MIN
is programmed later. The T
SETTINGS FOR THERMAL
MIN
− T
HYST
.
MIN
values chosen are
MIN
Rev. 3 | Page 42 of 77 | www.onsemi.com
register
MIN
MIN
.
(0x62) keep the fans running at the PWM minimum duty cycle
if the temperature falls below T
T
Register 0x67, Remote 1 temperature T
Register 0x68, local temperature T
Register 0x69, Remote 2 temperature T
Enhanced Acoustics Register 1 (0x62)
Bit 7 (MIN3) = 0, PWM3 is off (0% PWM duty cycle) when the
temperature is below T
Bit 7 (MIN3) = 1, PWM3 runs at PWM3 minimum duty cycle
when the temperature is below T
Bit 6 (MIN2) = 0, PWM2 is off (0% PWM duty cycle) when the
temperature is below T
Bit 6 (MIN2) = 1, PWM2 runs at PWM2 minimum duty cycle
when the temperature is below T
Bit 5 (MIN1) = 0, PWM1 is off (0% PWM duty cycle) when the
temperature is below T
Bit 5 (MIN1) = 1, PWM1 runs at PWM1 minimum duty cycle
when the temperature is below T
MIN
Registers
MIN
MIN
MIN
– T
– T
– T
HYST
HYST
HYST
MIN
MIN
MIN
MIN
.
.
.
.
MIN
– T
– T
– T
= 0x9A (90°C)
MIN
MIN
HYST
HYST
HYST
= 0x9A (90°C)
= 0x9A (90°C)
.
.
.