S-8233B Datasheet, PDF (8/26 Pages) Seiko Instruments Inc – BATTERY PROTECTION IC (FOR A 3-SERIAL-CELL PACK)

BATTERY PROTECTION IC FOR 3-SERIAL-CELL PACK
S-8233B Series
Rev.4.2_00
„ Test Circuits
Caution At the Measurement circuit from (1) to (15).
If the device’s CTL logic is “normal” (S-8233BA, S-8233BC, S-8233BE) then set the CTL
voltage at V_SS (V4=0V).
If the device’s CTL logic is “reverse” (S-8233BB, S-8233BD) then set the CTL voltage at V_CC
(V4=V1+V2+V3).
(1) Measurement 1 Measurement circuit 1
Set V1, V2, and V3 to 3.5 V under normal condition. Increase V1 from 3.5 V gradually. The V1 voltage
when COP = 'H' is over charge detection voltage 1 (V_CU1). Decrease V1 gradually. The V1 voltage when
COP = 'L' is over charge release voltage 1 (V_CD1). Further decrease V1. The V1 voltage when DOP = 'H'
is over discharge voltage 1 (V_DD1). Increase V1 gradually. The V1 voltage when DOP = 'L' is over
discharge release voltage 1 (V_DU1).
Remark: The voltage change rate is 150 V/s or less.
(2) Measurement 2 Measurement circuit 1
Set V1, V2, and V3 to 3.5 V under normal condition. Increase V2 from 3.5 V gradually. The V2 voltage
when COP = 'H' is over charge detection voltage 2 (V_CU2). Decrease V2 gradually. The V2 voltage when
COP = 'L' is over charge release voltage 2 (V_CD2). Further decrease V2. The V2 voltage when DOP = 'H'
is over discharge voltage 2 (V_DD2). Increase V2 gradually. The V2 voltage when DOP = 'L' is over
discharge release voltage 2 (V_DU2).
Remark: The voltage change rate is 150 V/s or less.
(3) Measurement 3 Measurement circuit 1
Set V1, V2, and V3 to 3.5 V under normal condition. Increase V3 from 3.5 V gradually. The V3 voltage
when COP = 'H' is over charge detection voltage 3 (V_CU3). Decrease V3 gradually. The V3 voltage when
COP = 'L' is over charge release voltage 3 (V_CD3). Further decrease V3. The V3 voltage when DOP = 'H'
is over discharge voltage 3 (V_DD3). Increase V3 gradually. The V3 voltage when DOP = 'L' is over
discharge release voltage 3 (V_DU3).
Remark: The voltage change rate is 150 V/s or less.
(4) Measurement 4 Measurement circuit 2
Set V1, V2, V3 to 3.5 V and V5 to 0 V under normal condition. Increase V5 from 0 V gradually. The V5
voltage when DOP = 'H' and COP = 'H', is over current detection voltage 1 (V_IOV1).
Set V1, V2, and V3 to 3.5 V and V5 to 0 V under normal condition. Fix the COVT terminal at V_SS,
increase V5 from 0 V gradually. The V5 voltage when DOP = 'H' and COP = 'H' is over current detection
voltage 2 (V_IOV2).
Set V1, V2, and V3 to 3.5 V and V5 to 0 V under normal condition. Fix the COVT terminal at V_SS,
increase V5 gradually from 0 V at 400 μs to 2 ms. The V5 voltage when DOP = 'H' and COP = 'H' is over
current detection voltage 3 (V_IOV3).
(5) Measurement 5 Measurement circuit 3
Set S1 to ON, V1, V2, and V3 to 3.5 V, and V5 to 0 V under normal condition and measure current
consumption. I1 is the normal condition current consumption (I_OPE), I2, the cell 2 current consumption
(I_CELL2), and I3, the cell 3 current consumption (I_CELL3).
Set S1 to ON, V1, V2, and V3 to 1.5 V, and V5 to 4.5 V under over discharge condition. Current
consumption I1 is power-down current consumption (I_PDN).
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Seiko Instruments Inc.