S-8204B Seiko, S-8204B Datasheet - Page 18

• Manufacturer Part Number: S-8204B
• Description: BATTERY PROTECTION IC
• Manufacturer: Seiko

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18
BATTERY PROTECTION IC FOR 3-SERIES OR 4-SERIES CELL PACK
S-8204B Series
9. 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”.
In cascade connection, it is possible to use the S-8204B Series for protecting 6, 7 or 8-cell battery by combining the
electrical level of SEL pin.
*1. Low; SEL ≤ V
*2. High; SEL ≥ V
SEL pin in S-8204B (1)
Table 8 Conditions Set by SEL Pin in Cascade Connection
High
Low
Low
*1. High; SEL ≥ V
*2. Low; SEL ≤ V
*1
*1
*2
SELL
SELH
Table 7 Conditions Set by SEL Pin
SEL Pin
High
Open
Low
*2
*1
Seiko Instruments Inc.
SEL pin in S-8204B (2)
SELL
SELH
High
High
Low
*1
*2
*2
4-cell protection
3-cell protection
Condition
Indefinite
6-series cell protection
7-series cell protection
8-series cell protection
Condition
Rev.2.1
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