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| S-8204BAB-TCT1Y Datasheet, PDF (19/36 Pages) Seiko Instruments Inc – BATTERY PROTECTION IC | |||
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Rev.3.9_00
BATTERY PROTECTION IC FOR 3-SERIES OR 4-SERIES CELL PACK
S-8204B Series
8. SEL pin
The S-8204B Series has a pin to switch-control the protection for 3-cell or 4-cell battery.
The overdischarge detection for V4-cell is inhibited by setting the SEL pin "L", so that short-circuiting the V4 cell does
not allow the overdischarge detection. This setting makes it possible to use the S-8204B Series for 3-cell protection.
The control by this SEL pin precedes the battery protection circuit. Be sure to use the SEL pin in "H" or "L".
Table 8 Conditions Set by SEL Pin
SEL Pin
"H"*1
Open
"L"*2
*1. "H"; SEL ⥠VSELH
*2. "L"; SEL ⤠VSELL
Condition
4-cell protection
Indefinite
3-cell protection
In cascade connection, it is possible to use the S-8204B Series for protecting 6-cell, 7-cell or 8-cell battery by
combining the electrical level of the SEL pin.
Table 9 Conditions Set by SEL Pin in Cascade Connection
SEL pin in S-8204B (1)
"L"*1
"L"*1
"H"*2
*1. "L"; SEL ⤠VSELL
*2. "H"; SEL ⥠VSELH
SEL pin in S-8204B (2)
"L"*1
"H"*2
"H"*2
Condition
6-series cell protection
7-series cell protection
8-series cell protection
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