s-8264a Seiko Instruments Inc., s-8264a Datasheet - Page 14

• Manufacturer Part Number: s-8264a
• Description: Battery Protection Ic For 2-serial To 4-serial-cell Pack Secondary Protection
• Manufacturer: Seiko Instruments Inc.

14
BATTERY PROTECTION IC FOR 2-SERIAL TO 4-SERIAL-CELL PACK (SECONDARY PROTECTION)
S-8264A/B Series
4. Test Mode
In the S-8264A/B Series, the overcharge detection delay time (t
The test mode can be set by retaining the VDD pin voltage 8.5 V or more higher than the SENSE pin voltage for at least
80 ms (V1 = V2 = V3 = V4 = 3.5 V, Ta = 25 °C). The status is retained by the internal latch and the test mode is retained
even if the VDD pin voltage is decreased to the same voltage as that of the SENSE pin.
When CO becomes “H” when the delay time has elapsed after overcharge detection, the latch for retaining the test
mode is reset and the S-8264A/B Series exits from the test mode.
*1. In the product t
Pin voltage
Battery voltage
Test mode
CO pin
Cautions 1. When the VDD pin voltage is decreased to lower than the UVLO voltage of 2 V (Typ.), the
In the product t
(n = 1 to 4)
V
2. Set the test mode when no batteries are overcharged.
3. The overcharge release delay time (t
4. The overcharge timer reset delay time (t
CUn
S-8264A/B Series returns to the normal mode.
CU
CU
t
TST
VDD pin voltage
V
= 4 s Typ. during normal mode, t
= 2 s Typ. during normal mode, t
HCn
= 80 ms max.
8.5 V or
more
Seiko Instruments Inc.
SENSE pin voltage
Figure 8
CL
CU
CU
) is not shortened in the test mode.
*1
= 64 ms Typ.
= 32 ms Typ.
TR
) is not shortened in the test mode.
CU
) can be shortened by entering the test mode.
t
CL
Rev.2.0
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