s-8215a Seiko Instruments Inc., s-8215a Datasheet - Page 10

• Manufacturer Part Number: s-8215a
• Description: S-8215a Series Battery Protection Ic
• Manufacturer: Seiko Instruments Inc.

10
BATTERY PROTECTION IC FOR 4-SERIAL / 5-SERIAL CELL PACK (SECONDARY PROTECTION)
S-8215A Series
Operation
1. Normal status
2. Overcharge status
3. Overcharge Timer Reset
Remark Refer to “
If the voltage of all the batteries is lower than “the overcharge detection voltage (V
voltage (V
When the voltage of one of the batteries exceeds V
retained for the overcharge detection delay time (t
overcharge. Connecting FET to the CO pin provides charge control and a second protection.
If the voltage of all the batteries is lower than V
Series changes to normal status.
When an overcharge release noise that forces the voltage of the battery temporarily below V
when V
noise persists is shorter than the overcharge timer reset delay time (t
overcharge release noise persists is t
exceeded, counting t
CUn
HCn
is exceeded to when charging is stopped, t
)”,CO pin output changes to “L” (Active “H”) or “H”(Active L”). This is called normal status.
Battery Protection IC Connection Example”.
CU
resumes.
TR
or longer, counting of t
Seiko Instruments Inc.
CUn
+ V
CUn
CU
HCn
CU
) or longer, CO pin output changes. This status is called
and the status is retained for typ. 2.0 ms or longer, S-8215A
during charging under normal conditions and the status is
is continuously counted if the time the overcharge release
CU
is reset once. After that, when V
TR
). Under the same conditions, if the time the
CUn
) + the overcharge hysteresis
CUn
is input during t
Rev.1.1
CUn
has been
CU
_00
from