S-82B1AAA-I6T1U Datasheet, PDF (9/35 Pages) Seiko Instruments Inc – High-accuracy voltage detection circuit

BATTERY PROTECTION IC WITH CHARGE-DISCHARGE CONTROL FUNCTION FOR 1-CELL PACK
Rev.1.1_00
S-82B1A Series
 Test Circuits
When CTL pin control logic is active "H", SW1 and SW3 are turned off, SW2 and SW4 are turned on. When CTL pin control
logic is active "L", SW1 and SW3 are turned on, SW2 and SW4 are turned off.
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 = V5 = 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, V5 = 0 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 1, discharge overcurrent release voltage
(Test circuit 2)
3. 1 Release voltage of discharge overcurrent status "V_DIOV1"
Discharge overcurrent detection voltage 1 (V_DIOV1) is defined as the voltage V2 whose delay time for changing V_DO
from "H" to "L" is discharge overcurrent detection delay time (t_DIOV1) when the voltage V2 is increased from the
starting conditions of V1 = 3.4 V, V2 = V5 = 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_DIOV1 typ. or lower.
3. 2 Release voltage of discharge overcurrent status "V_RIOV"
V_DIOV1 is defined as the voltage V2 whose delay time for changing V_DO from "H" to "L" is t_DIOV1 when the voltage V2
is increased from the starting conditions of V1 = 3.4 V, V2 = V5 = 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. Discharge overcurrent detection voltage 2
(Test circuit 2)
Discharge overcurrent detection voltage 2 (V_DIOV2) is defined as the voltage V2 whose delay time for changing V_DO from
"H" to "L" is discharge overcurrent detection delay time 2 (t_DIOV2) when the voltage V2 is increased from the starting
conditions of V1 = 3.4 V, V2 = V5 = 0 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 = V5 = 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 = V5 = 0 V.
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