关于充电管理芯片bq2954的问题
时间:10-02
整理:3721RD
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请问BQ2954的温度信号输入引脚,即第八脚TS可不可以悬空,为什么我上拉到5V或下拉到0V,芯片都不能正常工作。而我在引脚上飞一根线,什么都不接,这时候,可以正常工作
TS脚用来采集电池温度,不能悬空。
对其接高接地分别表示电池温度过低或者过高,都会停止充电。(一般电池充电温度范围会在0到45~60度不等)。
请参考datasheet中有具体说明:
1) High-Temperature Cutoff Voltage: VTCO = 0.4 ∗ VCC
This voltage corresponds to the maximum temperature
(TCO) at which charging is allowed.
2) High-Temperature Fault Voltage: VHTF = 0.44 ∗ VCC
This voltage corresponds to the temperature (HTF) at
which charging resumes after exceeding TCO.
3) Low-Temperature Fault Voltage: VLTF = 0.6 ∗ VCC
This voltage corresponds to the minimum temperature
(LTF) at which charging is allowed.
Do you know about Renesola????