S-8233B Datasheet, PDF (19/26 Pages) Seiko Instruments Inc – BATTERY PROTECTION IC (FOR A 3-SERIAL-CELL PACK)

Rev.4.2_00
BATTERY PROTECTION IC FOR 3-SERIAl-CELL PACK
S-8233B Series
Caution 1. The above constants may be changed without notice.
2. If any electrostatic discharge of 2000 V or higher is not applied to the S-8233B series
with a human body model, R1, R2, R3, C1, C2, and C3 are unnecessary.
3. It has not been confirmed whether the operation is normal or not in circuits other than
the above example of connection. In addition, the example of connection shown above
and the constant do not guarantee proper operation. Perform through evaluation using
the actual application to set the constant.
„ Precautions
z If a charger is connected in the over discharge condition and one of the battery voltages becomes
equal to or higher than the over charge release voltage (V_CU) before the battery voltage which is
below the over discharge detection voltage (V_DD) becomes equal to or higher than the over discharge
release voltage (V_DU), the over discharge and over charge conditions are entered and the charging
and discharging FETs turn off. Both charging and discharging are disabled. If the battery voltage
which was higher than the over charge detection voltage (V_CU) falls to the over charge release voltage
(V_CD) due to internal discharging, the charging FET turns on.
If the charger is detached in the over charge and over discharge condition, the over charge condition
is released, but the over discharge condition remains. If the charger is connected again, the battery
condition is monitored after that. The charging FET turns off after the over charge detection delay
time, the over charge and over discharge conditions are entered.
z If any one of the battery voltages is equal to or lower than the over discharge release voltage (V_DU)
when they are connected for the first time, the normal condition may not be entered. If the VMP
terminal voltage is made equal to or higher than the V_CC voltage (if a charger is connected), the normal
condition is entered.
z If the CTL terminal floats in power-down mode, it is not pulled up in the IC, charging may not be
inhibited. However, the over discharge condition becomes effective. At that time, current
consumption would be increase because CTL terminal is affected by noise. If the charger is
connected, the CTL terminal is pulled up, and charging and discharging are inhibited immediately.
z Do not apply an electrostatic discharge to this IC that exceeds the performance ratings of the built-in
electrostatic protection circuit.
z SII claims no responsibility for any disputes arising out of or in connection with any infringement by
products including this IC of patents owned by a third party.
Seiko Instruments Inc.
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