S-8239AAA-M6T1U Datasheet, PDF (13/30 Pages) Seiko Instruments Inc – OVERCURRENT MONITORING IC

Rev.1.4_03
OVERCURRENT MONITORING IC FOR MULTI-SERIAL-CELL PACK
S-8239A Series
4. Delay circuit
The detection delay times are determined by dividing a clock of approximately 3.5 kHz with the counter.
Remark The overcurrent 2 detection delay time (t_DIOV2) starts when the overcurrent 1 detection voltage (V_DIOV1) is
detected. When the overcurrent 2 detection voltage (V_DIOV2) is detected over t_DIOV2 after the detection of
V_DIOV1, the S-8239A Series becomes the overcurrent status within t_DIOV2 from the time of detecting V_DIOV2.
DO pin
V_SS
High-Z
t_DIOV2
0 ≤ t_D ≤ t_DIOV2
t_D
Time
VINI pin
V_DIOV2
V_DIOV1
V_SS
Figure 9
Time
5. DP pin
The DP pin is a test pin for delay time measurement and it should be open in the actual application.
If a capacitor whose capacitance is 1000 pF or more or a resistor whose resistance is 1 MΩ or less is connected to
this pin, error may occur in the delay times or in the detection voltages.
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