- 您现在的位置：买卖IC网 > PDF目录22035 > ADM1026JST-REEL (ON Semiconductor)IC CNTRL SYS REF/EEPROM 48LQFP PDF资料下载
参数资料
| 型号： | ADM1026JST-REEL |
| 厂商： | ON Semiconductor |
| 文件页数： | 22/55页 |
| 文件大小： | 0K |
| 描述： | IC CNTRL SYS REF/EEPROM 48LQFP |
| 产品变化通告： | MFG CHG Notification ADI to ON Semi Product Obsolescence 30/Sept/2009 |
| 标准包装： | 2,000 |
| 功能： | 硬件监控器 |
| 传感器类型： | 内部和外部 |
| 感应温度： | 0°C ~ 100°C |
| 精确度： | ±3°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： | 无 |
| 输出风扇： | 是 |
| 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： | 48-LQFP |
| 供应商设备封装： | 48-LQFP（7x7） |
| 包装： | 带卷 (TR) |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页当前第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页
ADM1026
12 V
described below, the four MSBs of this register set the
minimum fan speed.
DAC
1/4
LM324
R3
100k W
R2
39k W
Q1
IRF9620
The open drain PWM output must be amplified and
buffered to drive the fans. The PWM output is intended to
be used with an NMOS driver, but may be inverted by setting
Bit 1 of Test Register 1 (Address 14h) if using PMOS
drivers. Figure 40 shows how a fan may be driven under
PWM control using an N-channel MOSFET.
+V
R1
10k ?
Figure 37. Fan Drive Circuit with Op Amp and
P-channel MOSFET
12 V
PWM
3.3 V
10k ? TYP
5.0 V OR 12 V
FAN
Q1
NDT3055L
R2
100k W
R2
100k W
Q3
IRF9620
Figure 40. PWM Fan Drive Circuit Using an
N-channel MOSFET
Automatic Fan Speed Control
The ADM1026 offers a simple method of controlling fan
DAC
Q1/Q2
MBT3904
DUAL
R3
39k ?
R4
10k ?
speed according to temperature without intervention from
the host processor. Monitoring must be enabled by setting
Bit 0 of Configuration Register 1 (Address 00h), to enable
automatic fan speed control. Automatic fan speed control
can be applied to the DAC output, the PWM output, or both,
by setting Bit 5 and/or Bit 6 of Configuration Register 1.
Figure 38. Discrete Fan Drive Circuit with P-channel
MOSFET, Single Supply
The T MIN registers (Addresses 10h to 12h) contain
minimum temperature values for the three temperature
channels (on-chip sensor and two remote diodes). This is the
temperature at which a fan starts to operate when the
DAC
Q1/Q2
MBT3904
DUAL
R2
100k W
R3
39k ?
R4
10k ?
+12 V
Q3
IRF9620
temperature sensed by the controlling sensor exceeds T MIN .
T MIN can be the same or different for all three channels.
T MIN is set by writing a twos complement temperature value
to the T MIN registers. If any sensor channel is not required
for automatic fan speed control, T MIN for that channel
should be set to 127 ? C (01111111).
In automatic fan speed control mode, (as shown Figure 41
and Figure 42) the four MSBs of the DAC control register
(Address 04h) and PWM control register (Address 05h) set
the minimum values for the DAC and PWM outputs. Note
that, if both DAC control and PWM control are enabled
DAC Output Voltage + 2.5
Code
256
R1
4.7k ?
–12 V
Figure 39. Discrete Fan Drive Circuit with P-channel
MOSFET, Dual Supply
PWM Output
Fan speed may also be controlled using pulse width
modulation (PWM). The PWM output (Pin 18) produces a
pulsed output with a frequency of approximately 75 Hz and
a duty cycle defined by the contents of the PWM control
register (Address 05h). During automatic fan speed control,
(Bits 5 and 6 of Configuration Register 1 = 1), the four MSBs
of the DAC control register (Address 04h) define the
minimum fan speed values for both the DAC and PWM
outputs. The value in the PWM control register (Address 05h)
has no effect.
Minimum DAC Code DAC MIN = 16 ? D
(eq. 12)
Minimum PWM Duty Cycle PWMMIN = 6.67 ? D
where D is the decimal equivalent of Bits 7 to 4 of the
register.
http://onsemi.com
22
相关PDF资料 |
PDF描述 |
|---|---|
| AGLN020V2-CSG81 | IC FPGA 20K 1.2-1.5V CSP81 |
| ADM1026JST | IC CNTRL SYS REF/EEPROM 48LQFP |
| LQG15HSR22J02D | INDUCTOR 220NH 120MA 0402 |
| GCC10DCSN | CONN EDGECARD 20POS DIP .100 SLD |
| VJ1206Y122KBAAT4X | CAP CER 1200PF 50V 10% X7R 1206 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ADM1026JST-REEL7 | 功能描述:IC CNTRL SYS REF/EEPROM 48LQFP RoHS:否 类别:集成电路 (IC) >> PMIC - 热管理 系列:- 标准包装:1 系列:- 功能:温度监控系统（传感器） 传感器类型:内部和外部 感应温度:-40°C ~ 125°C，外部传感器 精确度:±2.5°C 本地（最大值），±5°C 远程（最大值） 拓扑:ADC，比较器，寄存器库 输出类型:2 线 SMBus? 输出警报:无 输出风扇:无 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:SOT-23-8 供应商设备封装:SOT-23-8 包装:Digi-Reel® 其它名称:296-22675-6 |
| ADM1026JSTZ | 功能描述:PMIC 解决方案 HI INT SYS MONITR IC RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| ADM1026JSTZ-R7 | 功能描述:PMIC 解决方案 HI INT SYS MONITR IC RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| ADM1026JSTZ-REEL | 功能描述:板上安装温度传感器 HI INT SYS MONITR IC RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| ADM1026JSTZ-REEL7 | 制造商:Analog Devices 功能描述:IC SYSTEM MONITOR 制造商:ON Semiconductor 功能描述:IC SYSTEM MONITOR |
发布紧急采购，3分钟左右您将得到回复。