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PDF S8254 Data sheet ( Hoja de datos )
| Número de pieza | S8254 | |
| Descripción | BATTERY PROTECTION IC | |
| Fabricantes | Seiko Instruments | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de S8254 (archivo pdf) en la parte inferior de esta página. Total 25 Páginas | ||
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Rev.2.3_00
BATTERY PROTECTION IC
FOR 3-SERIAL OR 4-SERIAL-CELL PACK
S-8254 Series
The S-8254 series is a protection IC for 3-serial or 4-serial cell
lithium ion rechargeable batteries and includes a high-accuracy
voltage detector and delay circuit.
The S-8254 series protects both 3-serial or 4-serial cells using the
SEL pin for switching.
Features
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(1) High-accuracy voltage detection for each cell
• Overcharge detection voltage n (n = 1 to 4)
• Overcharge release voltage n (n = 1 to 4)
3.9 V to 4.4 V (50 mV steps) Accuracy ±25 mV
3.8 V to 4.4 V*1
Accuracy ±50 mV
*1. Overcharge hysteresis voltage n (n = 1 to 4) can be selected as 0 V or from a range of 0.1 V to 0.4
V in 50 mV steps.
(Overcharge hysteresis voltage = Overcharge detection voltage − Overcharge release voltage)
• Overdischarge detection voltage n (n = 1 to 4) 2.0 V to 3.0 V (100 mV steps) Accuracy ±80 mV
• Overdischarge release voltage n (n = 1 to 4) 2.0 V to 3.4 V*2
Accuracy ±100 mV
*2. Overdischarge hysteresis voltage n (n = 1 to 4) can be selected as 0 V or from a range of 0.2 V to
0.7 V in 100 mV steps.
(Overdischarge hysteresis voltage = Overdischarge release voltage − Overdischarge detection
voltage)
(2) Three-level overcurrent protection
• Overcurrent detection voltage 1
0.05 V to 0.3 V (50 mV steps) Accuracy ±25 mV
• Overcurrent detection voltage 2
0.5 V
Accuracy ±100 mV
• Overcurrent detection voltage 3
VC1 − 1.2 V
Accuracy ±300 mV
(3) Delay times for overcharge detection, overdischarge detection and overcurrent detection 1 can be set by
external capacitors. (Delay times for overcurrent detection 2 and 3 are fixed internally.)
(4) Switchable between a 3-serial cell and 4-serial cell using the SEL pin
(5) Charge/discharge operation can be controlled via the control pins.
(6) Withstanding voltage element
Absolute maximum rating: 26 V
(7) Wide operating voltage range
2 V to 24 V
(8) Wide operating temperature range
−40°C to +85 °C
(9) Low current consumption
• Operation mode 30 µA max. (+25°C)
• Power-down mode 0.1 µA max. (+25°C)
Applications
• Lithium-ion rechargeable battery packs
Package
• 16-Pin TSSOP (Package drawing code: FT016-A)
Seiko Instruments Inc.
1
1 page  
Rev.2.3_00
BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL-CELL PACK
S-8254 Series
Absolute Maximum Ratings
Parameter
Input voltage between VDD and
VSS
Input pin voltage
VMP pin input voltage
DOP pin output voltage
COP pin output voltage
Power dissipation
Operating temperature range
Storage temperature range
Symbol
VDS
VIN
VVMP
VDOP
VCOP
PD
Topr
Tstg
Table 3
(Ta = 25°C unless otherwise specified)
Applicable Pins
Rating
Unit
VSS − 0.3 to VSS + 26 V
VC1, VC2, VC3, VC4,
CTL, SEL, CCT, CDT, VINI
VMP
DOP
COP
VSS − 0.3 to VDD+ 0.3
VSS − 0.3 to VSS + 26
VSS − 0.3 to VDD + 0.3
VSS − 0.3 to VSS + 26
400
−40 to +85
−40 to +125
mW
°C
Caution The absolute maximum ratings are rated values exceeding which the product could suffer
physical damage. These values must therefore not be exceeded under any conditions.
www.DataSheet4U.com
Seiko Instruments Inc.
5
5 Page 
Rev.2.3_00
BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL-CELL PACK
S-8254 Series
www.DataSheet4U.com
V
A
A
A
S-8254
1 COP
2 VMP
3 DOP
4 VINI
5 CDT
6 CCT
7 VSS
8 NC
VDD 16
VC1 15
VC2 14
VC3 13
VC4 12
CTL 11
SEL 10
NC 9
Test Circuit 4
S-8254
1 COP
2 VMP
3 DOP
4 VINI
5 CDT
6 CCT
7 VSS
8 NC
VDD 16
VC1 15
VC2 14
VC3 13
VC4 12
CTL 11
SEL 10
NC 9
C1 =
0.1 µF
A
A
A
A
A
A
C1 =
0.1 µF
Test Circuit 5
Figure 3 Test Circuit (2/2)
V1
V2
V3
V4
V1
V2
V3
V4
Seiko Instruments Inc.
11
11 Page | ||
| Páginas | Total 25 Páginas | |
| PDF Descargar | [ Datasheet S8254.PDF ] | |
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