ZHCSDT4D June 2015 – September 2020 BQ29209-Q1
PRODUCTION DATA
请参考 PDF 数据表获取器件具体的封装图。
Sizing the external capacitor is based on the desired delay time as follows:
Where td is the desired delay time and XDELAY is the overvoltage delay time scale factor, expressed in seconds per microfarad. XDELAY is nominally 9 s/µF. For example, if a nominal delay of 3 seconds is desired, use a CCD capacitor that is 3 s / 9 s/µF = 0.33 µF.
The delay time is calculated as follows:
If the cell overvoltage condition is removed before the external capacitor reaches the reference voltage, the internal current source is disabled and an internal discharge block is employed to discharge the external capacitor down to 0 V. In this instance, the OUT pin remains in a low state.