参数资料
型号: ADM1030ARQ
厂商: ON Semiconductor
文件页数: 16/30页
文件大小: 327K
描述: IC SNSR TEMP/FAN PWM CTRL 16QSOP
标准包装: 98
功能: 风扇控制,温度监控器
传感器类型: 内部和外部
感应温度: 0°C ~ 100°C,外部传感器
精确度: ±1°C,±1°C(最小值)
拓扑: ADC,比较器,多路复用器,寄存器库
输出类型: SMBus?
输出警报:
输出风扇:
电源电压: 3 V ~ 5.5 V
工作温度: 0°C ~ 100°C
安装类型: 表面贴装
封装/外壳: 16-SSOP(0.154",3.90mm 宽)
供应商设备封装: 16-QSOP
包装: 管件
ADM1030
http://onsemi.com
16
Example 3
T
MIN
 = 0?/SPAN>C, T
RANGE
 = 40癈
Min DC   = 33% = 5 decimal (Table 11)
Calculate T
MAX
(eq. 5)
T
MAX
+ T
MIN
) ((Max DC * Min DC) T
RANGE
10)
T
MAX
+ 0 ) ((100% DC * 33% DC) 4010)
T
+ 0 ) ((15 * 5) 4) + 40
T
MAX
 =405C. (As seen on Slope 1 of Figure 26)
In this case, since the Minimum Duty Cycle is the default
33%, the equation for T
MAX
 reduces to:
(eq. 6)
T
MAX
+ T
MIN
) ((Max DC * Min DC) T
RANGE
10)
T
MAX
+ T
MIN
) ((15 * 5) T
RANGE
10)
T
MAX
+ T
MIN
) (10 T
RANGE
10)
T
MAX
+ T
MIN
) T
RAN  E
Relevant Registers for Automatic Fan Speed
Control Mode
Register 0x00 Configuration Register 1
<7>    Logic 1 selects Automatic Fan Speed
Control, Logic 0 selects software control
(Default = 1).
<6:5>   00 = Remote Temperature controls Fan
11 = Fastest Calculated Speed controls the
fan when Bit 7 = Logic 1.
Register 0x20 Fan Characteristics Register 1
<2:0>   Fan 1 Spin-up Time
000 = 200 ms
001 = 400 ms
010 = 600 ms
011 = 800 ms
100 = 1 sec
101 = 2 secs (Default)
110 = 4 secs
111 = 8 secs
<5:3>   PWM Frequency Driving the Fan
000 = 11.7 Hz
001 = 15.6 Hz
010 = 23.4 Hz
011 = 31.25 Hz (Default)
100 = 37.5 Hz
101 = 46.9 Hz
110 = 62.5 Hz
111 = 93.5 Hz
<7:6>   Speed Range N; defines the lowest fan speed
that can be measured by the device.
00 = 1: Lowest Speed = 2647 RPM
01 = 2: Lowest Speed = 1324 RPM
10 = 4: Lowest Speed = 662 RPM
11 = 8: Lowest Speed = 331 RPM
Register 0x22 Fan Speed Configuration Register
<3:0>   Min Speed: This nibble contains the speed at
which the fan will run when the temperature
is at T
MIN
. The default is 0x05, meaning that
the fan will run at 33% duty cycle when the
temperature is at T
MIN
.
Register 0x24 Local Temp T
MIN
/T
RANGE
<7:3>   Local Temp T
MIN
. These bits set the
temperature at which the fan will turn on
when under Auto Fan Speed Control. T
MIN
can be programmed in 4癈 increments.
00000 = 0癈
00001 = 4癈
00010 = 8癈
00011 = 12癈
|
|
01000 = 32癈 (Default)
|
|
11110 = 120癈
11111 = 124癈
<2:0>   Local Temperature T
RANGE
. This nibble sets
the temperature range over which Automatic
Fan Speed Control takes place.
000 = 5癈
001 = 10癈
010 = 20癈
011 = 40癈
100 = 80癈
Register 0x25 Remote Temperature T
MIN
/T
RANGE
<7:3>   Remote Temperature T
MIN
. Sets the
temperature at which the fan will switch on
based on Remote Temperature Readings.
00000 = 0?/SPAN>C
00001 = 4?/SPAN>C
00010 = 8?/SPAN>C
00011 = 12?/SPAN>C
|
|
01100 = 48?/SPAN>C
|
|
11110 = 120?/SPAN>C
11111 = 124?/SPAN>C
<2:0>   Remote Temperature T
RANGE
. This nibble
sets the temperature range over which the fan
will be controlled based on Remote
Temperature readings.
000 = 5?/SPAN>C
001 = 10?/SPAN>C
010 = 20?/SPAN>C
011 = 40?/SPAN>C
100 = 80?/SPAN>C
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