s-8264a Seiko Instruments Inc., s-8264a Datasheet - Page 9

• Manufacturer Part Number: s-8264a
• Description: Battery Protection Ic For 2-serial To 4-serial-cell Pack Secondary Protection
• Manufacturer: Seiko Instruments Inc.

Rev.2.0
Test Circuits
(1) Test Condition 1, Test Circuit 1
(2) Test Condition 2, Test Circuit 1
(3) Test Condition 3, Test Circuit 1
(4) Test Condition 4, Test Circuit 2
(5) Test Condition 5, Test Circuit 3
Set V1, V2, V3, and V4 to 3.5 V. Overcharge detection voltage 1 (V
voltage of V1 has been gradually increased. The overcharge hysteresis voltage (V
and V
Overcharge detection voltage V
same way as when n = 1.
Set V1, V2, V3, and V4 to 3.5 V and in a moment of time (within 10 µs) increase V1 up to 5.0 V. The overcharge
detection delay time (t
of time (within 10 µs) decrease V1 down to 3.5 V. The overcharge release delay time (t
has reached 3.5 V to when CO becomes “L”.
Set V1, V2, V3, and V4 to 3.5 V and in a moment of time (within 10 µs) increase V1 up to 5.0 V. This is defined as the
first rise. Within t
in a moment of time (within 10 µs) restore up to 5.0 V. This is defined as the second rise. When the period from when
V1 was fallen to the second rise is short, CO becomes “H” after t
when V1 falls to the second rise is gradually made longer, CO becomes “H” when t
The overcharge timer reset delay time (t
In the S-8264A Series, set V1, V2, V3, and V4 to 3.5 V and V5 to 14 V. The CTL pin response time (t
from when V5 reaches 0 V after V5 is in a moment of time (within 10 µs) decreased down to 0 V to when CO becomes
“H”.
In the S-8264B Series, set V1, V2, V3, and V4 to 3.5 V and V5 to 14 V after an overvoltage is detected and CO becomes
“H”. In a moment of time (within 10 µs) raise V5 from 0 V to 14 V. The CTL pin response time (t
when V5 becomes 14 V to when CO becomes “L”.
After setting V1, V2, V3, and V4 to 3.5 V and V5 to 0 V, in a moment of time (within 10 µs) increase V5 up to 8.5 V and
decrease V5 again down to 0 V. When the period from when V5 was raised to when it has fallen is short, if an
overcharge detection operation is performed subsequently, the overcharge detection time is t
period from when V5 is raised to when it is fallen is gradually made longer, the overcharge detection time during the
subsequent overcharge detection operation is shorter than t
when V5 was raised to when it has fallen at that time.
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CU1
when CO is “L” after the voltage of V1 has been gradually decreased.
BATTERY PROTECTION IC FOR 2-SERIAL TO 4-SERIAL-CELL PACK (SECONDARY PROTECTION)
CU
− 20 ms after the first rise, in a moment of time (within 10 µs) decrease V1 down to 3.5 V and then
CU
) is the period from when V1 reached 5.0 V to when CO becomes “H”. After that, in a moment
CUn
(n = 2 to 4) and overcharge hysteresis V
TR
) is the period from V1 fall till the second rise at that time.
Seiko Instruments Inc.
CU
. The transition time to test mode (t
CU
has elapsed since the first rise. If the period from
CU1
) is the V1 voltage when CO is “H” after the
HCn
(n = 2 to 4) can be determined in the
CU
has elapsed since the second rise.
HC1
) is the difference between V1
CL
) is the period from when V1
S-8264A/B Series
CU
CTL
. However, when the
TST
) is the period from
) is the period from
CTL
) is the period
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