S8233C datasheet(7/26 Pages) SII

7 / 26 page

BATTERY PROTECTION IC FOR 3-SERIAL-CELL PACK

Rev.4.0_00

S-8233C Series

Seiko Instruments Inc.

Measurement Circuits

(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 (VCU1). Decrease V1 gradually. The V1 voltage when

COP = 'L' is over charge release voltage 1 (VCD1). Further decrease V1. The V1 voltage when DOP = 'H'

is over discharge voltage 1 (VDD1). Increase V1 gradually. The V1 voltage when DOP = 'L' is over

discharge release voltage 1 (VDU1).

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 (VCU2). Decrease V2 gradually. The V2 voltage when

COP = 'L' is over charge release voltage 2 (VCD2). Further decrease V2. The V2 voltage when DOP = 'H'

is over discharge voltage 2 (VDD2). Increase V2 gradually. The V2 voltage when DOP = 'L' is over

discharge release voltage 2 (VDU2).

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 (VCU3). Decrease V3 gradually. The V3 voltage when

COP = 'L' is over charge release voltage 3 (VCD3). Further decrease V3. The V3 voltage when DOP = 'H'

is over discharge voltage 3 (VDD3). Increase V3 gradually. The V3 voltage when DOP = 'L' is over

discharge release voltage 3 (VDU3).

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 V4 to 0 V under normal condition. Increase V4 from 0 V gradually. The V4

voltage when DOP = 'H' and COP = 'H, is over current detection voltage 1 (VIOV1).

Set V1, V2, and V3 to 3.5 V and V4 to 0 V under normal condition. Fix the COVT terminal at VSS,

increase V4 from 0 V gradually. The V4 voltage when DOP = 'H" and COP = 'H' is over current detection

voltage 2 (VIOV2).

Set V1, V2, and V3 to 3.5 V and V4 to 0 V under normal condition. Fix the COVT terminal at VSS,

increase V4 gradually from 0 V at 400

µs to 2 ms. The V4 voltage when DOP = 'H" and COP = 'H' is over

current detection voltage 3 (VIOV3).

(5) Measurement 5 Measurement circuit 3

Set S1 to ON, V1, V2, and V3 to 3.5 V, and V4 to 0 V under normal condition and measure current

consumption. I1 is the normal condition current consumption (IOPE), I2, the cell 2 current consumption

(ICELL2), and I3, the cell 3 current consumption (ICELL3).

Set S1 to ON, V1, V2, and V3 to 1.5 V, and V4 to 4.5 V under over discharge condition. Current

consumption I1 is power-down current consumption (IPDN).

(6) Measurement 6 Measurement circuit 3

Set S1 to ON, V1, V2, and V3 to 3.5 V, and V4 to 10.5 V under normal condition. V4/I4 is the internal

resistance between VCC and VMP (RVCM).

Set S1 to ON, V1, V2, and V3 to 1.5 V, and V4 to 4.1 V under over discharge condition. (4.5-V4)/I4 is the

internal resistance between VSS and VMP (RVSM).

S8233C Datasheet(PDF) 7 Page - Seiko Instruments Inc

S8233C Datasheet(HTML) 7 Page - Seiko Instruments Inc

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