S-8250BAB-I6T1U Datasheet, PDF (10/32 Pages) Seiko Instruments Inc – BATTERY PROTECTION IC FOR 1-CELL PACK

BATTERY PROTECTION IC FOR 1-CELL PACK
S-8250B Series
Rev.1.1_02
 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 conditions 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 the voltage V1 is then gradually
increased from the starting condition of V2 = 0.02 V. Overdischarge hysteresis voltage (V_HD) is defined as the
difference between V_DU and V_DL.
3. Discharge overcurrent detection voltage
(Test circuit 2)
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.
4. Discharge overcurrent release voltage (Release condition of discharge overcurrent status "load
disconnection")
(Test circuit 2)
Set 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 the voltage V2 is then gradually decreased from the starting condition of V2 = 3.4 V.
5. 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.
6. 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.
7. 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, V2 = 0 V.
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