参数资料
型号: ADM1027ARQZ
厂商: ON Semiconductor
文件页数: 48/56页
文件大小: 1822K
描述: IC THER CTRL VOLT/MONITOR 24QSOP
产品变化通告: MFG CHG Notification ADI to ON Semi
Product Discontinuation Notice 25/Aug/2008
Product Obsolescence 30/Sept/2009
标准包装: 56
系列: dBCool®
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 ~ 105°C,外部传感器
精确度: ±1°C
拓扑: ADC,比较器,风扇速度计数器,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 ~ 105°C
安装类型: 表面贴装
封装/外壳: 24-SSOP(0.154",3.90mm 宽)
供应商设备封装: 24-QSOP
包装: 管件
REV. A
48
ADM1027
Table XVIII. Register 0x62  Enhance Acoustics Register 1 (Power-On Default = 0x00)
Bit
Name
R/W
Description
<2:0>
ACOU
Read-Only
These bits select the ramp rate applied to the PWM1 output. Instead of PWM1 jump-
ing instantaneously to its newly calculated speed, PWM1 will ramp gracefully at the rate
determined by these bits. This feature enhances the acoustics of the fan being driven by
the PWM1 output.
Time slot increase
Time for 33% to 100%
000 = 1
35 sec
001 = 2
17.6 sec
010 = 3
1.8 sec
011 = 5
7 sec
100 = 8
4.4 sec
101 = 12
3 sec
110 = 24
1.6 sec
111 = 48
0.8 sec
<3>
EN1
Read/Write
When this bit is 1, acoustic enhancement is enabled on PWM1 output. When
acoustic enhancement is enabled, fan spin-up time should be disabled.
<4>
Reserved
Read-Only
Reserved for future use.
<5>
MIN1
Read/Write
When the ADM1027 is in automatic fan control mode, this bit defines whether PWM 1
is off (0% duty cycle) or at PWM 1 minimum duty cycle when the controlling temperature
is below its T
MIN
  hysteresis value.
0 = 0% duty cycle below T
MIN
 hysteresis
1 = PWM 1 minimum duty cycle below T
MIN
 hysteresis
<6>
MIN2
Read/Write
When the ADM1027 is in automatic fan speed control mode, this bit defines whether
PWM 2 is off (0% duty cycle) or at PWM 2 minimum duty cycle when the controlling
temperature is below its T
MIN
  hysteresis value.
0 = 0% duty cycle below T
MIN
 hysteresis
1 = PWM 2 minimum duty cycle below T
MIN
 hysteresis
<7>
MIN3
Read/Write
When the ADM1027 is in automatic fan speed control mode, this bit defines whether
PWM 3 is off (0% duty cycle) or at PWM 3 minimum duty cycle when the controlling
temperature is below its T
MIN
  hysteresis value.
0 = 0% duty cycle below T
MIN
  hysteresis
1 = PWM 3 minimum duty cycle below T
MIN
 hysteresis
This register becomes read-only when the Configuration Register 1 lock bit is set to 1. Any further attempts to write to this register
will have no effect.
Rev. 3 | Page 48 of 56 | www.onsemi.com
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