參數(shù)資料
型號(hào): 9TCS1083NLGI8
廠商: INTEGRATED DEVICE TECHNOLOGY INC
元件分類: 模擬信號(hào)調(diào)理
英文描述: SPECIALTY ANALOG CIRCUIT, QCC32
封裝: 0.50 MM PITCH, ROHS COMPLIANT, VFQFPN-32
文件頁數(shù): 25/39頁
文件大小: 491K
代理商: 9TCS1083NLGI8
9TCS1083
MOBILE ACCESS—CLOCK SYNTHESIZER, TEMPERATURE SENSOR, & PWM FAN CONTROLLER FOR PORTABLE DEVICES
IDT MOBILE ACCESS—CLOCK SYNTHESIZER, TEMPERATURE SENSOR, & PWM FAN CONTROLLER FOR PORTABLE DEVICES
31
9TCS1083
REV 0.5 100511
Direct Drive Mode
In Direct Drive Mode, the fan speed is directly controlled by
setting a fixed PWM duty cycle. After a proper fan speed
spin-up, the tachometer signal will be ignored and the
9TCS1083 will output the fixed programmed PWM duty
cycle to the fan.
To operate in direct drive mode, Register byte[24], bit[7:6] =
[00].
The duty cycle is selectable through registers by writing
byte[26], bit[7:0] and byte[27], bit[7:5] as follows:
It is important to also set the required fan spin-up specifics
for proper use. The 9TCS1083 after completion of the fan
spin-up routine will then put out the correct programmed
PWM duty cycle.
Thermal Trigger Mode
In this mode the 9TCS1083 fan speed controller is
programmed to run at different fan speeds. The 9TCS1083
will monitor the fan tachometer and depending on the
temperature from a thermal sensor diode and the
pre-programmed temperature settings, the 9TCS1083 will
adjust the fan speed to the targeted tachometer settings.
Register byte[24], bit[7:6] = [01] will put 9TCS1083 into
thermal trigger mode.
Temperature Sensor
The temperature can be set to read from the external
thermal sensors, DX1 or DX2, or from the internal diode
sensor. It is selectable by writing Byte[33].
FAN_CH_SEL - byte[33], bit[1:0]
Tachometer Update
The tachometer reading can be updated at a rate of
700msec up to 100msecs. Tachometer Update Time,
byte[27], bit[4:2]
Byte[26], Bit[7:0]
Logic "1", Selects Duty Cycle
Bit[7]
1
Bit[6]
1/2
Bit[5]
1/4
Bit[4]
1/8
Bit[3]
1/16
Bit[2]
1/32
Bit[1]
1/64
Bit[0]
1/128
Byte[27], Bit[7:5]
Logic "1", Selects Duty Cycle
Bit[7]
1/256
Bit[6]
1/512
Bit[5]
1/1024
Byte[33], bit[1:0]
Temperature Sensor Selection
[00]
CH1
[01]
CH2
[10] (default)
Internal Temperature Diode
Byte[27], bit[4:2]
Tachometer Update Time
[000]
100 msec
[001] (default)
200 msec
[010]
300 msec
[011]
400 msec
[100]
500 msec
[101]
600 msec
[110]
700 msec
[111]
800 msec
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