CXFA31572线串行接口接受标准系统管理总线（SMBusTM）的写入字节、读取字节、发送字节和接收字节命令。SMBus地址为72小时用于写入，73小时用于读取。CXFA3157包含3/4控制器。风扇控制器执行闭环和开环控制。CXFA3157根据FG输入和外部提供的32.768kHz时钟确定当前风扇转速。驾驶能力为5毫安。CXFA3157还提供风扇故障和失控事件警报。CXFA3157包含3个精确的数字温度计、3/4风扇控制器、风扇故障检测。温度计报告2个远程传感器和1个本地传感器的温度。远程传感器是二极管连接晶体管，通常是一种低成本、易于安装的2N3904 NPN型或二极管内置CPU。多晶体管制造商的遥控精度为±1°C。本地精度为±3°C。CXFA3157还支持通过SMBus进行偏移调整功能，以修复由于CPU二极管或寄生电阻不同而产生的误差。
测量两个远程和一个本地温度
通过SMBus为每个传感器调整偏移
·精度：远程±1°C（+20°C至+80°C）±3°C（-10°C至+120°C）
+4.5V至+5.5V电源范围
·二极管故障、风扇故障和风扇失控的警报信号
支持SMBus警报响应
使用线性控制算法的风扇驱动器
·风扇的闭环速度控制和可编程8位开环电压控制
·风扇调速范围宽，当风扇设定值>50时，精度在2%以内
风扇控制器的内部电流限制和超温保护
·内置变频器，用于驱动晶体
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[ CXFA3157 ]"
目录
7.相关产品
产品概述 返回TOP
The 2-wire serial interface accepts standard System Management Bus (SMBusTM) Write Byte, Read Byte, Send Byte, and Receive Byte commands. The SMBus address is 72h for write and 73h for read. CXFA3157 contains 3/4 controllers. FAN controller performs closed-loop and open-loop control. CXFA3157determines the current fan speed based on the FG inputs and an externally supplied 32.768kHz clock. The driving ability is 5mA. CXFA3157also provides ALERT for fan fail and out of control event.The CXFA3157contains 3 precise digital thermometers, 3/4 fan controllers, fan failure detection. The thermometers report the temperature of 2 remote sensors and 1 local sensor. The remote sensors are diode-connected transistors typically a low-cost, easily mounted 2N3904 NPN type or the diode built-in in CPU. Remote accuracy is ±1°C for multiple transistor manufacturer. Local accuracy is ±3°C. The CXFA3157also support offset adjust function via SMBus to fix the error due to different CPU diode or parasitic resistors.
产品特点 返回TOP
„ Measures Two Remote and One Local Temperatures
„ Adjustable Offset for Each Sensor via SMBus
„ Accuracy: Remote ±1°C (+20°C to +80°C) ±3°C (-10°C to +120°C)
„ +4.5V to +5.5V Supply Range
„ Alert Signal for Diode Fault, Fan Fail, and Fan Out of Control
„ Supports SMBus Alert Response
„ Fan Drivers Using Linear Control Algorithm
„ Closed Loop Speed Control and programmable 8 Bits Open Loop Voltage Control for Fan
„ Wide speed control range for Fan, Accuracy within 2%, when FANx_SET_CNT > 50
„ Internal Current-limit and Over-temperature Protection for the Fan Controllers
„ Build-In Inverters for Driving Crystal
„ 20-Pin TSSOP Package
应用范围 返回TOP
„ Projector, LCD TV, PDP TV
„ Desktop and Notebook
„ Central Office Computers
„ Telecom Equipments
„ Industrial Controls
„ LAN Servers
技术规格书（产品PDF) 返回TOP
需要详细的PDF规格书请扫一扫微信联系我们，还可以获得免费样品以及技术支持！
产品封装图 返回TOP
电路原理图 返回TOP
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Sensor and Fan Controller |
|||||||||
|
Part NO. |
VCC(V) min. |
VCC(V) max. |
Remote |
Local |
Fan |
Slave Address |
Accuracy (°C) |
Note |
Package |
|
4.5 |
5.5 |
2 |
1 |
3 |
111001 |
±1 |
-- |
TSSOP20 |
|
|
4.5 |
5.5 |
2 |
1 |
3 |
Selectable |
±1 |
Build-in clock |
TSSOP20 |
|
|
4.5 |
5.5 |
2 |
1 |
4 |
111001 |
±1 |
Build-in clock |
TSSOP20 |
|
|
4.5 |
5.5 |
2 |
1 |
4 |
111001 |
±1 |
-- |
TSSOP20 |
|
|
4.5 |
5.5 |
3 |
-- |
1 |
111101 |
±1 |
Support transitor mode |
SSOP20 |
|
|
4.5 |
5.5 |
3 |
-- |
1 |
-- |
±1 |
-- |
TQFN4X4-24 |
|
|
4.5 |
5.5 |
3 |
-- |
1 |
111101 |
±1 |
PWM fan controller Hardware Sets SHDN |
SSOP16 TQFN4X4-24 |
|
|
Fan Controller & Driver |
|||||||||
|
Part NO. |
VCC(V) min. |
VCC (V) max. |
IOUT (A) |
Crystal (kHz) |
Interface |
Speed Control |
FOUT |
Note |
Package |
|
4.5 |
5.5 |
0.8 |
NA |
SMBus |
PWM |
PWM Pulse |
FG,SCP |
SOP-8 |
|
|
3 |
5.5 |
0.5 |
32.768 |
SMBus |
Linear/ PWM |
DAC PWM |
FG,X2,ALERT#,CLK( 1% ),ADD0 for address selectable,Open &Close loop control,SCP |
MSOP10 |
|
|
3 |
5.5 |
0.5 |
NA |
SMBus |
Linear/ PWM |
DAC PWM |
FG,X2,ALERT#,CLK,ADD0 for address selectable,Open &Close loop control,SCP |
SOP8/MSOP8/MSOP10 |
|
|
3 |
5.5 |
0.5 |
32.768 |
SMBus |
Linear/ PWM |
DAC PWM |
FG,X2,ALERT#,CLK( 3% ),ADD0 for address selectable,Open &Close loop control,SCP |
SOP8/MSOP8/MSOP10 |
|
|
Fan Driver |
|||||||||
|
Part NO. |
VCC(V) min. |
VCC (V) max. |
IOUT (A) |
Enable active |
Control Interface |
Control Method |
VOUT |
Note |
Package |
|
3 |
5.5 |
0.5 |
High |
VSET |
Linear |
1.6XVSET |
EN,OCP,OTP,G993 with SS |
SOP-8 |
|
|
3 |
5.5 |
0.5 |
-- |
VSET |
Linear |
1.6X VSET |
FON#,OCP,OTP,G995 with SS |
SOP-8 |
|
|
10 |
20 |
0.5 |
High |
VSET |
Linear |
4X VSET |
EN,OCP,OTP |
SOP-8 SOP-8(FD) |
|
|
8 |
15 |
0.5 |
High |
VSET |
Linear |
4X VSET |
EN,OCP,OTP |
SOP8 SOP8(FD) |
|
|
4.5 |
5.5 |
0.5 |
High |
VSET |
Linear |
1.6X VSET |
EN,OCP,OTP,VSET built-in SS |
SOP8/TDFN3X3-8 |
|
