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本帖最后由 snoopy8008 于 2010-7-26 09:45 编辑
蓝色感觉换头像了,哈哈,原来的头像有点……
下面是摘自LTC4002f的关于3h限制的解释,可能跟之前的理解不一样的。
“3 Hour Charge Termination Timer”
“An internal comparator detects the near end-of-charge condition while an internal timer sets the total charge time and terminates the charge cycle. After the charge cycle ends, if the battery voltage drops below 4.05V per cell, a new charge cycle will automatically begin.”
“An internal 3 hour timer determines the total charge time. After a time out occurs, the charge cycle is terminated and the CHRG pin is forced high impedance. To restart the charge cycle, remove and reapply the input voltage or momentarily shut the charger down. Also, a new charge cycle will begin if the battery voltage drops below the recharge threshold voltage of 4.05V per cell.”
LT芯片的3h应该是都一样的功能吧。
也就是说,如果采用小电流长时间充电,电池电压有可能会在4.05V停充,之后则可能是4.2V恒压阶段?? |
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