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S-8261 Datasheet

  • S-8261

  • BATTERY PROTECTION IC FOR SINGLE-CELL PACK

  • 36頁

  • SII

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Rev.1.9
_00
BATTERY PROTECTION IC FOR SINGLE-CELL PACK
S-8261 Series
The S-8261 series are lithium-ion / lithium polymer
rechargeable battery protection ICs incorporating high-
accuracy voltage detection circuit and delay circuit.
The S-8261 series are suitable for protection of single-cell
lithium ion/lithium polymer battery packs from overcharge,
overdischarge and overcurrent.
Features
(1) Internal high accuracy voltage detection circuit
鈥?/div>
Overcharge detection voltage
3.9 V to 4.4 V (applicable in 5 mV step)
Accuracy:
鹵25
mV (+25
擄C)
and
鹵30
mV (鈭?
擄C
to
+55 擄C)
鈥?/div>
Overcharge hysteresis voltage
0.0 V to 0.4 V
*1
Accuracy:
鹵25
mV
The overcharge hysteresis voltage can be selected from the range 0.0 V to 0.4 V in 50 mV step.
鈥?/div>
Overdischarge detection voltage
2.0 V to 3.0 V (applicable in 10 mV step) Accuracy:
鹵50
mV
鈥?/div>
Overdischarge hysteresis voltage 0.0 V to 0.7 V
*2
Accuracy:
鹵50
mV
The overdischarge hysteresis voltage can be selected from the range 0.0 V to 0.7 V in 100 mV step.
鈥?/div>
Overcurrent 1 detection voltage
0.05 V to 0.3 V (applicable in 10 mV step) Accuracy:
鹵15
mV
鈥?/div>
Overcurrent 2 detection voltage
0.5 V (fixed) Accuracy:
鹵100
mV
(2) High voltage device is used for charger connection pins
(VM and CO pins: absolute maximum rating
=
28 V)
(3) Delay times (overcharge: t
CU
, overdischarge: t
DL
, overcurrent 1: t
lOV1
, overcurrent 2: t
lOV2
) are generated
by an internal circuit. No external capacitor is necessary.
Accuracy:
鹵20%
(4) Three-step overcurrent detection circuit is included.
(overcurrent 1, overcurrent 2 and load short-circuiting)
(5) 0 V battery charge function 鈥渁vailable鈥?/ 鈥渦navailable鈥?are selectable.
(6) Charger detection function and abnormal charge current detection function
鈥?/div>
The overdischarge hysteresis is released by detecting negative voltage at the VM pin (鈭?.7 V typ.).
(Charger detection function)
鈥?/div>
When the output voltage of the DO pin is high and the voltage at the VM pin is equal to or lower than
the charger detection voltage (鈭?.7 V typ.), the output voltage of the CO pin goes low. (Abnormal
charge current detection function)
(7) Low current consumption
鈥?/div>
Operation mode
3.5
碌A
typ., 7.0
碌A
max.
鈥?/div>
Power-down mode
0.1
碌A
max.
(8) Wide operating temperature range
鈭?0 擄C
to
+85 擄C
(9) Small package SOT-23-6, 6-Pin SNB(B)
*1.
Overcharge release voltage
=
Overcharge detection voltage
鈭?/div>
Overcharge hysteresis voltage
(where overcharge release voltage
<
3.8 V is prohibited.)
*2.
Overdischarge release voltage
=
Overdischarge detection voltage
+
Overdischarge hysteresis voltage
(where overdischarge release voltage
>
3.4 V is prohibited.)
Applications
鈥?/div>
Lithium-ion rechargeable battery packs
鈥?/div>
Lithium polymer rechargeable battery packs
Seiko Instruments Inc.
1

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