S8235A datasheet(8/24 Pages) SII

8 / 24 page

FOR AUTOMOTIVE BATTERY PROTECTION IC FOR 3-SERIAL TO 5-SERIAL CELL PACK (SECONDARY PROTECTION)

S-8235A Series

Rev.1.5_00

Seiko Instruments Inc.

1. Overcharge detection voltage n (VCUn), Overcharge hysteresis voltage n (VHCn)

Set V1 = V2 = V3 = V4 = V5 = VCU

− 0.050 V in initial status 1. VCU1 is defined as the voltage V1 when the CO pin

output changes after the V1 voltage is gradually increased. VCUn (n = 2 to 5) can also be defined in the same way as

VCU1.

Moreover, set V1 = VCU

+ 0.050 V, V2 = V3 = V4 = V5 = 2.8 V in initial status 1. VHC1 is defined as the difference

between V1 and VHC1 when the CO pin output changes again after the V1 voltage is gradually decreased. VHCn

(n = 2 to 5) can also be defined in the same way as VHC1.

2. CLKI pin voltage "H" (VCLKIH), CLKI pin voltage "L" (VCLKIL), RSTI pin voltage "L" (VRSTIL),

RSTI pin voltage "H" (VRSTIH)

VCLKIH is defined as the voltage V8 when the CLKO pin output changes after the voltage V8 is gradually increased in

initial status 3. After that, VCLKIL is defined as the voltage V8 when the CLKO pin output changes again after the

voltage V8 is gradually decreased.

VRSTIL is defined as the voltage V9 when the CLKO pin output changes after the voltage V9 is gradually decreased in

initial status 2. After that, VRSTIH is defined as the voltage V9 when the CLKO pin output changes again after the

voltage V9 is gradually increased.

3. CAI pin voltage "H" (VCAIH), CAI pin voltage "L" (VCAIL)

Set V12 = VDN

− 0.5 V, V9 = 0 V in initial status 2. Repeat increasing the voltage V12 and outputting 9 clocks from V8.

VCAIH is defined as the minimum voltage V12 when the CAO pin output changes.

Set V12 = VDN, V9 = 0 V in initial status 2. Repeat decreasing the voltage V12 and outputting 9 clocks from V8. VCAIL

is defined as the maximum voltage V12 when the CAO pin output does not change.

4. CTL pin voltage "H" (VCTLH), CTL pin voltage "L" (VCTLL)

Set V13 = VDN

− 0.5 V in initial status 2. VCTLH is defined as the voltage V13 when the CO pin output changes after the

voltage V13 is gradually increased.

Set V13 = VDN in initial status 2. VCTLL is defined as the voltage V13 when the CO pin output changes again after the

voltage V13 is gradually decreased.

5. Current consumption during operation (IOPE), Current consumption during overdischarge (IOPED)

Set V1 = V2 = V3 = V4 = V5 = VCU

− 1.0 V, V8 = V9 = VDN in initial status 1. IOPE is defined as the total current which

flows in the VDD pin and the VC1 pin.

Set V1 = V2 = V3 = V4 = V5 = 2.3 V, V8 = V9 = VDN in initial status 1. IOPED is defined as the total current which flows

in the VDD pin and the VC1 pin.

6. VCn pin current (IVCn)

Set V1 = V2 = V3 = V4 = V5 = VCU

− 1.0 V in initial status 1. IVCn is defined as the current which flows in the VCn pin

(n = 1 to 5), respectively.

7. VCn pin pull-down current (IVCLn), VCn pin pull-up current (IVCHn)

Set V1 = V2 = V3 = V4 = V5 = VCU

− 1.0 V, V9 = 0 V in initial status 1. IVCL2 is defined as the current which flows in the

VC2 pin after increasing the voltage V8 up to 5 V.

IVCL3 is defined as the current which flows in the VC3 pin subsequently after decreasing the voltage V8 down to 0 V

and increasing the voltage V8 up to 5 V. After that, each time increasing the voltage V8 up to 5 V from 0 V, the current

which flows in the VCn pin (n = 3 to 5) is defined in order of IVCH3, IVCH4, and IVCH5, respectively.

8. CLKI pin current "H" (ICLKIH), CLKI pin current "L" (ICLKIL)

Set V8 = VDN

− 2.0 V, V9 = 0 V in initial status 2. ICLKIH is defined as the maximum current which flows in the CLKI pin

when voltage V8 is gradually increased. ICLKIL is defined as the current which flows in the CLKI pin after setting V9 =

0 V in initial status 2.

S8235A Datasheet(PDF) 8 Page - Seiko Instruments Inc

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