CXFA3159测量三个远程温度通过SMBus为每个传感器调整偏移支持单核双核和四核CPU应用传感器3的可编程硬件热关机和传感器1 2的可编程软件热关机带写保护功能的SMBus 2线串行接口

CXFA3159包含3个精密数字温度计、一个风扇控制器、硬件和软件热关机以及一个系统复位电路。温度计报告3个遥感器的温度。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。CXFA3159还支持通过SMBus的偏移调整功能，以修复由于CPU二极管或寄生电阻不同而导致的错误。2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7ah用于写入，7bh用于读取，并支持通过命令20h写入保护功能，以防止μP的错误行为。CXFA3159包含一个风扇控制器。风扇1控制器执行闭环和开环控制。CXFA3159根据FG输入和外部提供的32.768kHz时钟确定当前风扇转速。风扇1的驱动能力为500毫安。CXFA3159还提供风扇故障和失控事件警报。CXFA3159提供硬件和软件热关机。硬件热关机用于传感器3。这个
触发点由外部电阻设置。软件热关机的触发点通过SMBus设置。如果发生热关机事件，热管脚输出低。CXFA3159包含一个微处理器（μP）监控电路，用于监控μP和数字系统中的电源。重置阈值通常设置为4.38V。
·测量三个远程温度
通过SMBus为每个传感器调整偏移
支持单核、双核和四核CPU应用
精度：？1℃（+60℃~+100℃）？3℃（-10℃~+120℃）
+4.5V至+5.5V电源范围
·传感器3的可编程硬件热关机和传感器1、2的可编程软件热关机。
带写保护功能的SMBus 2线串行接口。
·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
使用内置MOSFET线性控制算法的风扇驱动器
·风扇1的闭环速度控制和可编程8位开环电压控制
·风扇1速度控制范围宽，设定值>50时精度在2%以内
·风扇内部电流限制和超温保护
·复位功能精确监控5V电源电压
用晶体管模型测量热二极管
支持45nm、65nm和90nm CPU热二极管
·内部时钟32768Hz，在5V VCC下，精度为25°C至80°C的±3%
可编程使用外部时钟

目录

1.产品概述       2.产品特点     

3.应用范围       4.技术规格书下载（PDF文档）

5.产品封装       6.电路原理图  

7.相关产品

   产品概述 返回TOP

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The CXFA3159 contains 3 precise digital thermometers, one fan controllers, hardware and software thermal shutdown, and a system-reset circuit. The thermometers report the temperature of 3 remote sensors. 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. The CXFA3159 also support offset adjust function via SMBus to fix the error due to different CPU diode or parasitic resistors. 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 7ah for write and 7bh for read, and supports writting protection function by command 20h to prevent error behavior of μP. CXFA3159 contains one fan controllers. FAN1 controller performs closed-loop and open-loop control. CXFA3159determines the current fan speed based on the FG inputs and an externally supplied 32.768kHz clock. The driving ability of FAN1 is 500mA. CXFA3159also provide ALERT for fan fail and out of control event. The CXFA3159provides hardware and software thermal shutdown. The hardware thermal shutdown is for the sensor 3. The trigger point is set by external resistors. The trigger points of software thermal shutdown are set via SMBus. If thermal shutdown event occurs, THERM pin outputs low. The CXFA3159contains a microprocessor (μP) supervisory circuit used to monitor the power supplies in μP and digital systems. Reset threshold is set to 4.38V typical.

   产品特点 返回TOP

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„ Measures Three Remote Temperatures 

„ Adjustable Offset for Each Sensor via SMBus 

„ Support Single-Core, Dual-Core and Quad-Core CPU Application 

„ Accuracy: ±1°C (+60°C to +100°C) ±3°C (-10°C to +120°C) 

„ +4.5V to +5.5V Supply Range 

„ Programmable Hardware Thermal Shutdown for Sensor 3 and Programmable Software Thermal Shutdown for Sensor 1, 2. 

„ SMBus 2-Wire Serial Interface With Writting Protection Function. 

„ Alert Signal for Diode Fault, Fan Fail, and Fan Out of Control 

„ Supports SMBus Alert Response 

„ Fan Drivers Using Linear Control Algorithm with Built-in MOSFET 

„ Closed Loop Speed Control and programmable 8 Bits Open Loop Voltage Control for Fan1 

„ Wide speed control range for Fan1, Accuracy within 2%, when SET_CNT1 > 50 

„ Internal Current- limit and Over-temperature Protection for the Fan 

„ Reset Function Precision Monitoring of 5V Power-Supply Voltage 

„ Measure Thermal Diode with Transistor Model 

„ Support 45nm, 65nm and 90nm CPU thermal diode 

„ Internal Clock 32768Hz, Accuracy ±3% from 25°C to 80°C at 5V VCC 

„ Programmable to Use External Clock 

„ TQFN4X4-24 Package

   应用范围 返回TOP

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„ Desktop and Notebook 

„ Central Office Computers 

„ Telecom Equipment 

„ Smart Battery Packs 

„ Industrial Controls 

„ LAN Servers

   技术规格书（产品PDF) 返回TOP 

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     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

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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
CXFA3154	4.5	5.5	2	1	3	111001	±1	--	TSSOP20
CXFA3155	4.5	5.5	2	1	3	Selectable	±1	Build-in clock	TSSOP20
CXFA3156	4.5	5.5	2	1	4	111001	±1	Build-in clock	TSSOP20
CXFA3157	4.5	5.5	2	1	4	111001	±1	--	TSSOP20
CXFA3158	4.5	5.5	3	--	1	111101	±1	Support transitor  mode	SSOP20
CXFA3159	4.5	5.5	3	--	1	--	±1	--	TQFN4X4-24
CXFA3160	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
CXFA3161	4.5	5.5	0.8	NA	SMBus	PWM	PWM Pulse	FG,SCP	SOP-8
CXFA3162	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
CXFA3163/4	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
CXFA3165/6	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
CXFA3167 /8	3	5.5	0.5	High	VSET	Linear	1.6XVSET	EN,OCP,OTP,G993 with SS	SOP-8
CXFA3169 /70	3	5.5	0.5	--	VSET	Linear	1.6X VSET	FON#,OCP,OTP,G995 with SS	SOP-8
CXFA3171	10	20	0.5	High	VSET	Linear	4X VSET	EN,OCP,OTP	SOP-8 SOP-8(FD)
CXFA3172	8	15	0.5	High	VSET	Linear	4X VSET	EN,OCP,OTP	SOP8 SOP8(FD)
CXFA3173	4.5	5.5	0.5	High	VSET	Linear	1.6X VSET	EN,OCP,OTP,VSET built-in SS	SOP8/TDFN3X3-8