TEA2017 SNSFB 电源正常信号的意义?

cancel
Showing results for 
Show  only  | Search instead for 
Did you mean: 

TEA2017 SNSFB 电源正常信号的意义?

Jump to solution
504 Views
JackXiao
Contributor I

TEA2017 在 SNSFB引脚有接一个光耦到次级,但是次级接的是一颗100K的电阻,这只是增加假负载的作用吗?也就是在空载的时候让输出电压更稳定?因为这个只是加在Vout+和GND之间,还是只是用于测试用?谢谢

Tags (1)
0 Kudos
Reply
1 Solution
479 Views
guoweisun
NXP TechSupport
NXP TechSupport

guoweisun_0-1731494772808.png

应该是这个,你画的那个是100K

 

View solution in original post

0 Kudos
Reply
5 Replies
489 Views
JackXiao
Contributor I

谢谢您的回复,也就是对于电路来说这个子电路是没有必要的?对产品性能没有影响?串联的100R的电阻是接在光耦的初级?也就是发光管上串联?谢谢啦

JackXiao_0-1731486570311.png

 

0 Kudos
Reply
378 Views
JackXiao
Contributor I

您好, 请问贵司推荐的LLC使用的K值是多少? 计算的增益范围是多少?因为贵司的Demo上K值都取的很高,和一些文献上说的K取值3--6之间有些差异,请问这个原因何在?是否有相关的设计指南,也就是K L Q M等的设计指南,谢谢

0 Kudos
Reply
366 Views
guoweisun
NXP TechSupport
NXP TechSupport

麻烦您再提交一个ticket吧用公司的邮箱!这个case太久了!

0 Kudos
Reply
480 Views
guoweisun
NXP TechSupport
NXP TechSupport

guoweisun_0-1731494772808.png

应该是这个,你画的那个是100K

 

0 Kudos
Reply
497 Views
guoweisun
NXP TechSupport
NXP TechSupport

HI Jack

For engineering work, a series resistor can be added to observe the SNSFB current behavior.
100 Ω is a typical value for Rmeasure. Ensure that the measurement resistor does not introduce
disturbances regarding the power good signal .

简单讲就是测试用的!

 

Thanks!

0 Kudos
Reply