S-8233BBFT SII [Seiko Instruments Inc], S-8233BBFT Datasheet - Page 15

• Manufacturer Part Number: S-8233BBFT
• Description: BATTERY PROTECTION IC (FOR A 3-SERIAL-CELL PACK)
• Manufacturer: SII [Seiko Instruments Inc]

Rev.4.2
CTL logic “reverse”
CTL logic “normal”
Voltage temperature factor
0 V battery charging function
S-8233BC
S-8233BD
S-8233BA
S-8233BE
S-8233BB
This function is used to recharge the three serially-connected batteries after they self-discharge to 0 V.
When the 0 V charging start voltage (V
the charger, the charging FET gate is fixed to V
When the voltage between the gate sources of the charging FET becomes equal to or higher than the
turn-on voltage by the charger voltage, the charging FET turns on to start charging. At this time, the
discharging FET turns off and the charging current flows through the internal parasitic diode in the
discharging FET. If all the battery voltages become equal to or higher than the over discharge release
voltage (V
Caution: In the products without 0 V battery charging function, the resistance between VCC and
Voltage temperature factor 1 indicates over charge detection voltage, over charge release voltage, over
discharge detection voltage, and over discharge release voltage.
Voltage temperature factor 2 indicates over current detection voltage.
The Voltage temperature factors 1 and 2 are expressed by the oblique line parts in Figure 5.
Ex. Voltage temperature factor of over charge detection voltage Typ.
_00
CTL terminal voltage
V
CU25
V
[V]
CU
Statements
DU
The COP output is undefined below 2.0 V on VCC-VSS voltage in the products without
0 V battery charging function.
VMP and between VSS and VMP are lower than the products with 0 V battery charging
function. It causes to that over charge detection voltage increases by the drop voltage
of R5 (see Figure 9 for a connection example) with sink current at VMP.
), the normal condition returns.
COP (Charge control)
DOP (Discharge control)
Current consumption
COP
DOP
Current consumption
Table.5 Output voltage & current consumption by CTL terminal voltage
−20
25
BATTERY PROTECTION IC FOR 3-SERIAl-CELL PACK
High & Floated
battery voltage
battery voltage
Comply with
Comply with
Typ.20 μ A
Typ.20 μ A
Seiko Instruments Inc.
0CHAR
High
High
Normal &Over voltage state
) or higher is applied to between VMP and VSS by connecting
70
Figure 5
SS
potential.
V
+1 mV/°C
−1 mV/°C
Comply with battery voltage
Comply with battery voltage
CU25
is the over charge detection voltage at 25°C
Ta [°C]
Typ.20 μ A
Typ.20 μ A
High
High
Low
Typ. 1 nA
Typ. 1 nA
High
High
High
High
Low
Power down mode
(Without charger)
S-8233B Series
Typ. 1 nA
Typ. 1 nA
High
High
High
Low
Low
.
Unknown
Unknown
Unknown
Unknown
Floated
High
High
15