S-8204AAB-TCT1Y Datasheet, PDF (8/34 Pages) Seiko Instruments Inc – BATTERY PROTECTION IC

BATTERY PROTECTION IC FOR 3-SERIES OR 4-SERIES CELL PACK
S-8204A Series
Rev.3.5_00
 Test Circuit
This chapter describes how to test the S-8204A Series. In case of selecting to use it for 4-series cell battery,
set SEL pin = V_DD. For 3-series cell battery, set SEL pin = V_SS and short between VC3 pin and VC4 pin.
1. Current consumption during operation and power-down
(Test circuit 1)
1. 1 Current consumption during operation (I_OPE)
The current at the VSS pin when V1 = V2 = V3 = V4 = 3.5 V and V_VMP = V_DD is the current
consumption during operation (I_OPE).
1. 2 Current consumption during power-down (I_PDN)
The current at the VSS pin when V1 = V2 = V3 = V4 = 1.5 V and V_VMP = V_SS is the current
consumption during power-down (I_PDN).
2. Overcharge detection voltage, overcharge release voltage, overdischarge detection voltage,
overdischarge release voltage, discharge overcurrent detection voltage 1, discharge overcurrent
detection voltage 2, load short-circuit detection voltage, charge overcurrent detection voltage,
CTLC pin input voltage "H", CTLC pin input voltage "L", CTLD pin input voltage "H", CTLD pin
input voltage "L", SEL pin input voltage "H", SEL pin input voltage "L"
(Test circuit 2)
Confirm both COP pin and DOP pin are in "L" (its voltage level is V_DS × 0.1 V or less) after setting V_VMP
= V_SEL = V_DD, V_VINI = V_CTLC = V_CTLD = V_SS, CCT pin = Open, CDT pin = Open, CIT pin = Open, V1 = V2
= V3 = V4 = 3.5 V. (This status is referred to as initial status.)
2. 1 Overcharge detection voltage (V_CU1), overcharge release voltage (V_CL1)
The overcharge detection voltage (V_CU1) is a voltage at V1; when the COP pin's voltage is set to "H"
(its voltage level is V_DS × 0.9 V or more) after increasing a voltage at V1 gradually from the initial
status. After that, decreasing a voltage at V1 gradually, a voltage at V1 when the COP pin's voltage is
set to "L"; is the overcharge release voltage (V_CL1).
2. 2 Overdischarge detection voltage (V_DL1), overdischarge release voltage (V_DU1)
The overdischarge detection voltage (V_DL1) is a voltage at V1; when the DOP pin's voltage is set to "H"
after decreasing a voltage at V1 gradually from the initial status. After that, increasing a voltage at V1
gradually, a voltage at V1 when the DOP pin's voltage is set to "L"; is the overdischarge release
voltage (V_DU1).
By changing the voltage at Vn (n = 2 to 4), users can define the overcharge detection voltage (V_CUn),
the overcharge release voltage (V_CLn), the overdischarge detection voltage (V_DLn), the overdischarge
release voltage (V_DUn) as well when n = 1.
2. 3 Discharge overcurrent detection voltage 1 (V_DIOV1)
The discharge overcurrent detection voltage 1 (V_DIOV1) is the VINI pin's voltage; when the DOP pin's
voltage is set to "H" after increasing the VINI pin's voltage gradually from the initial status.
2. 4 Discharge overcurrent detection voltage 2 (V_DIOV2)
The discharge overcurrent detection voltage 2 (V_DIOV2) is a voltage at the VINI pin; when a flowing
current from the CIT pin reaches 500 μA or more after increasing the VINI pin's voltage gradually from
the initial status.
2. 5 Load short-circuit detection voltage (V_SHORT)
The load short-circuit detection voltage (V_SHORT) is the VINI pin's voltage; when the DOP pin's voltage
is set to "H" after increasing the VINI pin's voltage gradually from the initial status after setting the CIT
pin's voltage to the V_SS level.
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