TI中文支持网Part Number:BQ40Z50-R2
Hi
我现在在测试 CUVC 的时候，发现电流有时在很小时（30mA左右），会触发。但是当电流很大时 ( 1000mA ) 反而不会，按照下面的公式，不是电流越大，保护电压会越高嘛。 能帮忙确认一下这个电流是怎么来的嘛？
Min cell voltage1..4 – Current() × cell resistance ≤
CUVC: Threshold
另外能 帮忙分享一下 功能 UVP 和 CUVC 的差异嘛？CUVC 主要应用 在那些场景呢
谢谢了！
Star Xu：
您好，应该和不同电流时的阻抗值有关。
The gauge offers two under voltage protection features – CUV and CUVC. The intent is to use one or the other, but not both in operation. If the cell should not be discharged below 2.5V to prevent damage to the cell, then we set the CUV threshold to 2500mV. The CUVC protections feature offers the same protection, but it removes the drop across the series resistance. You still do not want the internal "storage voltage" of the battery to drop below 2.5V, so the CUVC threshold is set to this minimum voltage minus to voltage drop across the series resistance. So, assuming that the drop across the series resistance is 100mV and CUVC is set to 2400mV, the cell voltage can drop to 2400mV. A fault will not occur until the internal "storage voltage" drops below 2.5V. (2400mV CUVC threshold) The CUVC protection feature may be more useful with pulsed loads or high current applications.
UVP是基于硬件保护的低电压保护，一般设置的比CUV电压更低。
