S-8204BAC-TCT1G Seiko Instruments, S-8204BAC-TCT1G Datasheet - Page 16

• Manufacturer Part Number: S-8204BAC-TCT1G
• Description: Battery Management Battery Prot IC 3 or 4 Cell
• Manufacturer: Seiko Instruments

Specifications of S-8204BAC-TCT1G

• Product: Li-Ion Protection
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

16
BATTERY PROTECTION IC FOR 3-SERIES OR 4-SERIES CELL PACK
S-8204A Series
8. Delay Time Setting
In case C
In the S-8204A Series, users are able to set delay time for the period; from detecting any voltage of the
batteries or detecting changes in the voltage at the VINI pin, to the output to the COP, DOP pin. Each
delay time is determined by a resistor in the IC and an external capacitor.
In the overchage detection, when any voltage of the batteries gets V
charging to the CCT pin’s capacitor (C
the COP pin is set in high impedance if the voltage at the CCT pin reaches the CCT pin detection voltage
(V
t
Overdischarge detection delay time (t
overcurrent detection delay time 2 (t
using the following equations as well.
Short circuit detection voltage delay time (t
CU
CCT
t
t
t
t
t
t
t
t
t
t
is calculated using the following equation (V
CU
DL
DIOV1
DIOV2
CIOV
CU
DL
DIOV1
DIOV2
CIOV
). This period is overcharge detection delay time (t
[ms] = 1000 [kΩ] (Typ.) × 0.1 [μF] = 100 [ms] (Typ.)
[ms] =
[s] = 10.0 [MΩ] (Typ.) × 0.1 [μF] = 1.0 [s] (Typ.)
[s] = −ln ( 1 − V
[ms] = 200 [kΩ] (Typ.) × 0.1 [μF] = 20 [ms] (Typ.)
[ms] =
[ms] = 200 [kΩ] (Typ.) × 0.1 [μF] = 20 [ms] (Typ.)
[ms] = 20 [kΩ] (Typ.) × 0.1 [μF] = 2.0 [ms] (Typ.)
[ms] =
[ms] =
CCT
= −ln ( 1 − 0.7 (Typ.)) × C
= 10.0 [MΩ] (Typ.) × C
= C
−
ln ( 1
−
−
−
ln ( 1
CDT
ln ( 1
ln ( 1
−
= C
V
−
CCT
−
−
CDT
V
CIT
V
V
CIT
/ V
CIT
CIT
/ V
= 0.1 [μF], each delay time t
/ V
DS
/ V
/ V
DS
DS
) × C
DS
DS
) × C
CCT
) × C
) × C
) × C
CCT
[μF]
CCT
DIOV2
CDT
DL
CIT
CIT
CIT
CCT
[μF] × 8.31 [MΩ] (Typ.)
Seiko Instruments Inc.
), discharge overcurrent detection delay time 1 (t
[μF] × R
[μF] × R
[μF] × R
), charge overcurrent detection delay time (t
[μF] × R
[μF] × R
) via the CCT pin’s internal resistor (R
SHORT
DS
INC
) is fixed internally.
IND
INI1
INI1
INI2
= V1 + V2 + V3 + V4).
[MΩ]
[kΩ]
[kΩ]
[kΩ]
[kΩ]
CU
CU
, t
).
DL
, t
DIOV1
, t
CUn
DIOV2
or more, the S-8204 starts
, t
CIOV
INC
is calculated as follows.
). After a certain period,
CIOV
) are calculated
DIOV1
Rev.3.0
), discharge
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