S-8252AAA-M6T1U Datasheet, PDF (11/36 Pages) Seiko Instruments Inc – BATTERY PROTECTION IC

Rev.3.2_00
BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK
S-8252 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_CU1) 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 = V2 = V_CU − 0.05 V, V3 = 0 V. Overcharge release voltage
(V_CL1) is defined as the voltage V1 at which V_CO goes from "L" to "H" when the voltage V1 is then gradually decreased
after setting V2 = 3.5 V. Overcharge hysteresis voltage (V_HC1) is defined as the difference between V_CU1 and V_CL1.
Overcharge detection voltage (V_CU2) is defined as the voltage V2 at which V_CO goes from "H" to "L" when the voltage
V2 is gradually increased from the starting condition of V1 = V2 = V_CU − 0.05 V, V3 = 0 V. Overcharge release voltage
(V_CL2) is defined as the voltage V2 at which V_CO goes from "L" to "H" when the voltage V2 is then gradually decreased
after setting V1 = 3.5 V. Overcharge hysteresis voltage (V_HC2) is defined as the difference between V_CU2 and V_CL2.
2. Overdischarge detection voltage, overdischarge release voltage
(Test circuit 2)
Overdischarge detection voltage (V_DL1) 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 condition of V1 = V2 = 3.5 V, V3 = 0 V. Overdischarge release
voltage (V_DU1) is defined as the voltage V1 at which V_DO goes from "L" to "H" when the voltage V1 is then gradually
increased. Overdischarge hysteresis voltage (V_HD1) is defined as the difference between V_DU1 and V_DL1.
Overdischarge detection voltage (V_DL2) is defined as the voltage V2 at which V_DO goes from "H" to "L" when the
voltage V2 is gradually decreased from the starting condition of V1 = V2 = 3.5 V, V3 = 0 V. Overdischarge release
voltage (V_DU2) is defined as the voltage V2 at which V_DO goes from "L" to "H" when the voltage V2 is then gradually
increased. Overdischarge hysteresis voltage (V_HD2) is defined as the difference between V_DU2 and V_DL2.
3. Discharge overcurrent detection voltage
(Test circuit 2)
Discharge overcurrent detection voltage (V_DIOV) is defined as the voltage V3 whose delay time for changing V_DO from
"H" to "L" is discharge overcurrent detection delay time (t_DIOV) when the voltage V3 is increased from the starting
condition of V1 = V2 = 3.5 V, V3 = 0 V.
4. Load short-circuiting detection voltage
(Test circuit 2)
Load short-circuiting detection voltage (V_SHORT) is defined as the voltage V3 whose delay time for changing V_DO from
"H" to "L" is load short-circuiting detection delay time (t_SHORT) when the voltage V3 is increased from the starting
condition of V1 = V2 = 3.5 V, V3 = 0 V.
5. Charge overcurrent detection voltage, charger detection voltage
(Test circuit 2)
5. 1 With charge overcurrent detection function
Charge overcurrent detection voltage (V_CIOV) is defined as the voltage V3 whose delay time for changing V_CO
from "H" to "L" is charge overcurrent detection delay time (t_CIOV) when the voltage V3 is decreased from the
starting condition of V1 = V2 = 3.5 V, V3 = 0 V.
5. 2 Without charge overcurrent detection function
Charger detection voltage (V_CHA) is defined as the voltage V3 at which V_CO goes from "H" to "L" when the
voltage V3 is decreased from the starting condition of V1 = V2 = 3.5 V, V3 = 0 V.
6. Current consumption during operation
(Test circuit 2)
The current consumption during operation (I_OPE) is the current that flows through the VDD pin (I_DD) under the set
conditions of V1 = V2 = 3.5 V, V3 = 0 V.
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