Ti engineer,
我在使用LM3424做温度保护时,有一点不理解,请帮忙解释一下,AN-1969 LM3424 Boost Evaluation Board
1. 评估板说用100k的NTC,为何RNTC-BK会等于243K呢,RNTC-END=71.5K?
2.RNTC-BK和RNTC-END和NTC有什么关系?
Using a standard 100k NTC thermistor (connected to pins 4 and ll), find the resistances corresponding to
TBK and TEND (RNTC-BK = 243 kΩ and RNTC-END = 71.5 kΩ) from the manufacturer's datasheet. Assuming RREF1
= RREF2 = 49.9 kΩ, then RBIAS = RNTC-BK= 243 kΩ.
Johnsin Tao:
Hi
你可以查一下热敏电阻的阻值与温度对应关系,你或就能发现问题。
RNTC-END=71.5K, RNTC-BK=243K,, 应该是评估板设置的高低温对应的热敏电阻的阻值。