Hi SIr,
The MAX31740 ADI not release demo board ,can you provide 2-WIRE & 4-WIRE Fan design schematic and PCBA layout document to me refer. thanks
Best
Jack
Hi SIr,
The MAX31740 ADI not release demo board ,can you provide 2-WIRE & 4-WIRE Fan design schematic and PCBA layout document to me refer. thanks
Best
Jack
这个没有评估套件,您就直接参考规格书进行设计吧。
Hi SIr,
We have some question pls apply information to me refer. thanks
Q1:How to calculate RST、RD、RB、CB、CF component spec
Q2:Normal temperature of 25 degrees, if the HOST(MCU) sends a PWM signal to the MAX31740 to control the fan, will it work?
Q3:Where should the fan's TACH be connected to the MAX31740?
Best
Jack
Rst = Tstart下的thermistor的电阻值。有一些例子在P9 table1
RD 可以参考Vmin/Vdd = R2/(R1+R2)= Dmin(%)/200
CB和RB参考规格书P9 相对应的章节,常见的可以用5Mohm和1uF这个需要您仔细读一下规格书。
应该您不需要输入PWM, MAX31740 会自己生成。
tach是风扇转速,这个应该没法接回31740里面。您可以看看是不是可以接到您的MCU里面。