S-8240BAA-I6T1U Datasheet, PDF (9/37 Pages) Seiko Instruments Inc – BATTERY PROTECTION IC FOR 1-CELL PACK

Rev.1.0_00
BATTERY PROTECTION IC FOR 1-CELL PACK
S-8240B Series
 Test Circuits
Caution Unless otherwise specified, the output voltage levels "H" and "L" at CO pin (V_CO) and DO pin (V_DO) are
judged by the threshold voltage (1.0 V) of the N-channel FET. Judge the CO pin level with respect to V_VM
and the DO pin level with respect to V_SS.
1. Overcharge detection voltage, overcharge release voltage
(Test circuit 1)
Overcharge detection voltage (V_CU) is defined as the voltage V1 at which V_CO goes from "H" to "L" when the voltage V1
is gradually increased from the starting condition of V1 = 3.4 V. Overcharge release voltage (V_CL) is defined as the
voltage V1 at which V_CO goes from "L" to "H" when the voltage V1 is then gradually decreased. Overcharge hysteresis
voltage (V_HC) is defined as the difference between V_CU and V_CL.
2. Overdischarge detection voltage, overdischarge release voltage
(Test circuit 2)
Overdischarge detection voltage (V_DL) is defined as the voltage V1 at which V_DO goes from "H" to "L" when the voltage
V1 is gradually decreased from the starting conditions of V1 = 3.4 V, V2 = 0 V. Overdischarge release voltage (V_DU) is
defined as the voltage V1 at which V_DO goes from "L" to "H" when setting V2 = 0.01 V and when the voltage V1 is then
gradually increased. Overdischarge hysteresis voltage (V_HD) is defined as the difference between V_DU and V_DL.
3. Discharge overcurrent detection voltage, discharge overcurrent release voltage
(Test circuit 2)
3. 1 Release voltage of discharge overcurrent status "V_DIOV"
Discharge overcurrent detection voltage (V_DIOV) is defined as the voltage V2 whose delay time for changing V_DO
from "H" to "L" is discharge overcurrent detection delay time (t_DIOV) when the voltage V2 is increased from the
starting conditions of V1 = 3.4 V, V2 = 0 V. V_DO goes from "L" to "H" when setting V2 = 3.4 V and when the voltage
V2 is then gradually decreased to V_DIOV typ. or lower.
3. 2 Release voltage of discharge overcurrent status "V_RIOV"
V_DIOV is defined as the voltage V2 whose delay time for changing V_DO from "H" to "L" is t_DIOV when the voltage V2 is
increased from the starting conditions of V1 = 3.4 V, V2 = 0 V. Discharge overcurrent release voltage (V_RIOV) is
defined as the voltage V2 at which V_DO goes from "L" to "H" when setting V2 = 3.4 V and when the voltage V2 is
then gradually decreased.
4. Load short-circuiting detection voltage
(Test circuit 2)
Load short-circuiting detection voltage (V_SHORT) is defined as the voltage V2 whose delay time for changing V_DO from "H"
to "L" is load short-circuiting detection delay time (t_SHORT) when the voltage V2 is increased from the starting conditions
of V1 = 3.4 V, V2 = 0 V.
5. Charge overcurrent detection voltage
(Test circuit 2)
Charge overcurrent detection voltage (V_CIOV) is defined as the voltage V2 whose delay time for changing V_CO from "H" to
"L" is charge overcurrent detection delay time (t_CIOV) when the voltage V2 is decreased from the starting conditions of V1
= 3.4 V, V2 = 0 V.
6. Current consumption during operation
(Test circuit 3)
The current consumption during operation (I_OPE) is the current that flows through the VDD pin (I_DD) under the set
conditions of V1 = 3.4 V and V2 = 0 V.
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