S8249 datasheet(12/23 Pages) SII

12 / 23 page

VOLTAGE MONITORING IC WITH CELL BALANCING FUNCTION

S-8249 Series

Rev.1.4_00

3. Overcharge status

In the S-8249 Series, if VDS is the overcharge detection voltage (VCU) or higher and this status continues for the

overcharge detection delay time (tCU) or longer, the CO pin output is inverted. The CO pin output status varies

according to the output form and output logic selected, as shown in Table 11. This is the overcharge status. In

the overcharge status, the CB pin output becomes "L".

Table 11

CO Pin Output Form and Output Logic

CB Pin Output

CO Pin Output

CMOS output, active "H"

"L"

"H"

CMOS output, active "L"

"L"

Nch open-drain output, active "H"

"L"

"H"

Nch open-drain output, active "L"

"L"

The overcharge status is released when VDS drops to the overcharge release voltage (VCL) or lower and this

status continues for the overcharge release delay time (tCL) or longer.

4. CE

_____

The S-8249 Series has the CE

_____

pin (Power-saving mode switching pin). The S-8249 Series is set to

power-saving mode by inputting a voltage of VCE

_____

H or higher to the C E

_____

pin.

Table 12

_____

Status

Open (VCE

_____

= VSS)

Normal operation mode

"H" (VCE

_____

≥ VCE

_____

Power-saving mode

"L" (VCE

_____

≤ VCE

_____

Normal operation mode

In power-saving mode, the current consumption is decreased to current consumption during power-saving (IPSV).

The CB pin or the CO pin output in power-saving mode is the same as that in the normal status.

The CE

_____

pin is pulled down to VSS by the internal resistor. When in a mode other than power-saving mode, leave

the CE

_____

pin open or short it with VSS.

S8249 Datasheet(PDF) 12 Page - Seiko Instruments Inc

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