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Número de pieza | S-8253B | |
Descripción | BATTERY PROTECTION IC | |
Fabricantes | Seiko Instruments | |
Logotipo | ||
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No Preview Available ! Rev.2.1_00
BATTERY PROTECTION IC
FOR 2-SERIAL OR 3-SERIAL-CELL PACK
S-8253A/B Series
The S-8253A/B Series are protection ICs for 2-serial or 3-serial cell
lithium-ion rechargeable batteries and include high-accuracy
voltage detectors and delay circuits.
These ICs are suitable for protecting lithium-ion battery packs from
overcharge, overdischarge and overcurrent.
Features
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(1) High-accuracy voltage detection for each cell
• Overcharge detection voltage n (n = 1 to 3)
• Overcharge release voltage n (n = 1 to 3)
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 release voltage = Overcharge detection voltage − Overcharge hysteresis voltage
(Overcharge hysteresis voltage n (n = 1 to 3) can be selected as 0 V or from a range of 0.1 V to
0.4 V in 50 mV steps.)
• Overdischarge detection voltage n (n = 1 to 3) 2.0 V to 3.0 V (100 mV steps) Accuracy ±80 mV
• Overdischarge release voltage n (n = 1 to 3) 2.0 V to 3.4 V*2
Accuracy ±100 mV
*2. Overdischarge release voltage = Overdischarge release voltage − Overdischarge hysteresis
voltage
(Overdischarge hysteresis voltage n (n = 1 to 3) can be selected as 0 V or from a range of 0.2 V to
0.7 V in 100 mV steps.)
(2) Three-level overcurrent detection (including load short circuiting detection)
• Overcurrent detection voltage 1
0.05 V to 0.30 V (50 mV steps) Accuracy ±25 mV
• Overcurrent detection voltage 2
0.5 V (fixed)
• Overcurrent detection voltage 3
1.2 V (fixed)
(3) Delay times (overcharge, overdischarge, overcurrent) are generated by an internal circuit (external
capacitors are unnecessary).
(4) Charge/discharge operation can be inhibited via the control pin.
(5) 0 V battery charge function available/unavailable are selectable.
(6) High-voltage withstand devices
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
28 µA max. (+25°C)
• Power-down mode
0.1 µA max. (+25°C)
Applications
• Lithium-ion rechargeable battery packs
• Lithium polymer rechargeable battery packs
Package
• 8-Pin TSSOP (Package drawing code: FT008-D)
Seiko Instruments Inc.
1
1 page Rev.2.1_00
BATTERY PROTECTION IC FOR 2-SERIAL OR 3-SERIAL-CELL PACK
S-8253A/B Series
Pin Assignment
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DOP
COP
VMP
CTL
8-Pin TSSOP
Top view
18
27
36
45
Figure 3
VDD
VC1
VC2
VSS
Pin No.
1
2
3
4
5
6
7
8
Pin
Name
DOP
COP
VMP
CTL
VSS
VC2
VC1
VDD
Table 3 S-8253A Series
Function
Connection of discharge control FET gate
(CMOS output)
Connection of charge control FET gate (Nch
open-drain output)
Voltage detection between VDD and VMP
(overcurrent detection pin)
Input of charge/discharge control signal, pin for
shortening test time
(L: Normal operation,
H: Charge/discharge inhibited,
M (VDD × 1/2): Test time reduced)
Negative power supply input, negative voltage
connection for battery 2
No connection *1
Connection for negative voltage of battery 1 and
positive voltage of battery 2
Connection for positive power supply input and
positive voltage of battery 1
*1. No connection is electrically open.
This pin can be connected to VDD or VSS.
Remark For the external views, refer to package drawings.
Pin No.
1
2
3
4
5
6
7
8
Pin
Name
DOP
COP
VMP
CTL
VSS
VC2
VC1
VDD
Table 4 S-8253B Series
Function
Connection of discharge control FET gate
(CMOS output)
Connection of charge control FET gate (Nch
open-drain output)
Voltage detection between VDD and VMP
(overcurrent detection pin)
Input of charge/discharge control signal, pin for
shortening test time
(L: Normal operation,
H: Charge/discharge inhibited,
M (VDD × 1/2): Test time reduced)
Connection for negative power supply input and
negative voltage of battery 3
Connection for negative voltage of battery 2 and
positive voltage of battery 3
Connection for negative voltage of battery 1 and
positive voltage of battery 2
Connection for positive power supply input and
positive voltage of battery 1
Remark For the external views, refer to package drawings.
Seiko Instruments Inc.
5
5 Page Rev.2.1_00
BATTERY PROTECTION IC FOR 2-SERIAL OR 3-SERIAL-CELL PACK
S-8253A/B Series
9. VC1 pin current, VC2 pin current
(Test condition 9, test circuit 3)
• VC1 pin current (IVC1), VC2 pin current (IVC2)
The VC1 pin current (IVC1) is the current that flows through the VC1 pin when V1 = V2 = 3.5 V (S-8253A
Series), V1 = V2 = V3 = 3.5 V (S-8253B Series), and S3 = OFF, S4 = ON. Similarly, the VC2 pin current
(IVC2) is the current that flows through the VC2 pin under these conditions (S-8253B Series only).
10. COP pin leakage current, COP pin sink current
(Test condition 10, test circuit 4)
• COP pin leakage current (ICOH), COP pin sink current (ICOL)
The COP pin leakage current (ICOH) is the current that flows through the COP pin when V1 = V2 = 12 V
(S-8253A Series), V1 = V2 = V3 = 8 V (S-8253B Series), S6 = S7 = S8 = OFF, and S5 = ON.
The COP pin sink current (ICOL) is the current that flows through the COP pin when V1 = V2 = 3.5 V
(S-8253A Series), V1 = V2 = V3 = 3.5 V (S-8253B Series), V6 = 0.5 V, S5 = S7 = S8 = OFF, and S6 = ON.
11. DOP pin source current, DOP pin sink current
(Test condition 11, test circuit 4)
• DOP pin source current (IDOH), DOP pin sink current (IDOL)
The DOP pin source current (IDOH) is the current that flows through the DOP pin when V1 = V2 = 1.8 V
(S-8253A Series), V1 = V2 = V3 = 1.8 V (S-8253B Series), V7 = 0.5 V, S5 = S6 = S8 = OFF, and S7 = ON.
The DOP pin sink current (IDOL) is the current that flows through the DOP pin when V1 = V2 = 3.5 V
(S-8253A Series), V1 = V2 = V3 = 3.5 V (S-8253B Series), V8 = 0.5 V, S5 = S6 = S7 = OFF, and S8 = ON.
12.www.DataSheet4U.com 0 V charge start battery charger voltage or 0 V charge inhibition battery voltage
(Test condition 12, test circuit 5)
• 0 V charge start battery charger voltage (V0CHA): Products that available 0 V charge
The COP pin voltage should be lower than V0CHA max. −1 V when V1 = V2 = 0 V (S-8253A Series), V1 = V2
= V3 = 0 V (S-8253B Series), and V9 = VVMP = V0CHA max..
• 0 V charge inhibition battery voltage (V0INH): Products that unavailable 0 V charge
The COP pin voltage should be higher than VVMP − 1 V when V1 = V2 = V0INH min. (S-8253A Series), V1 =
V2 = V3 = V0INH min. (S-8253B Series), and V9 = VVMP = 24 V.
Seiko Instruments Inc.
11
11 Page |
Páginas | Total 28 Páginas | |
PDF Descargar | [ Datasheet S-8253B.PDF ] |
Número de pieza | Descripción | Fabricantes |
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