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PDF S-8215A Data sheet ( Hoja de datos )
| Número de pieza | S-8215A | |
| Descripción | BATTERY PROTECTION IC | |
| Fabricantes | Seiko Instruments | |
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S-8215A Series
www.sii-ic.com
© Seiko Instruments Inc., 2010-2015
BATTERY PROTECTION IC FOR 3-SERIAL TO 5-SERIAL CELL PACK
(SECONDARY PROTECTION)
Rev.2.3_00
The S-8215A Series is used for secondary protection of lithium-ion rechargeable batteries, and incorporates high-accuracy
voltage detection circuits and delay circuits.
Short-circuiting between cells makes it possible for serial connection of three cells to five cells.
Features
• High-accuracy voltage detection circuit for each cell
Overcharge detection voltage n (n = 1 to 5)
3.60 V to 4.70 V (50 mV step)
Accuracy ±25 mV (Ta = +25°C)
Accuracy ±30 mV (Ta = −5°C to +55°C)
Overcharge hysteresis voltage n (n = 1 to 5)
0.0 mV to −550 mV (50 mV step)
−300 mV to −550 mV
Accuracy ±20%
−100 mV to −250 mV
Accuracy ±50 mV
0.0 mV to −50 mV
Accuracy ±25 mV
• Delay times for overcharge detection can be set by an internal circuit only (External capacitors are unnecessary).
• Output form is selectable:
CMOS output, Nch open-drain output, Pch open-drain output
• Output logic is selectable:
Active "H", active "L"
• High-withstand voltage device:
Absolute maximum rating 28 V
• Wide operation voltage range:
3.6 V to 26 V
• Wide operation temperature range: Ta = −40°C to +85°C
• Low current consumption
At VCUn − 1.0 V for each cell:
At 2.3 V for each cell:
3.0 μA max. (Ta = +25°C)
1.7 μA max. (Ta = +25°C)
• Lead-free (Sn 100%), halogen-free
Application
• Lithium-ion rechargeable battery pack (for secondary protection)
Packages
• TMSOP-8
• SNT-8A
Seiko Instruments Inc.
1
1 page  
BATTERY PROTECTION IC FOR 3-SERIAL TO 5-SERIAL CELL PACK (SECONDARY PROTECTION)
Rev.2.3_00
S-8215A Series
Pin Configurations
1. TMSOP-8
Top view
18
27
36
45
Figure 2
2. SNT-8A
Top view
18
27
36
45
Figure 3
Pin No. Symbol
1 VDD
2 VC1
3 VC2
4 VC3
5 VC4
6 VC5
7 VSS
8 CO
Table 4
Description
Input pin for positive power supply
Positive voltage connection pin of battery 1
Negative voltage connection pin of battery 1
Positive voltage connection pin of battery 2
Negative voltage connection pin of battery 2
Positive voltage connection pin of battery 3
Negative voltage connection pin of battery 3
Positive voltage connection pin of battery 4
Negative voltage connection pin of battery 4
Positive voltage connection pin of battery 5
Input pin for negative power supply
Negative voltage connection pin of battery 5
FET gate connection pin for charge control
Pin No. Symbol
1 VDD
2 VC1
3 VC2
4 VC3
5 VC4
6 VC5
7 VSS
8 CO
Table 5
Description
Input pin for positive power supply
Positive voltage connection pin of battery 1
Negative voltage connection pin of battery 1
Positive voltage connection pin of battery 2
Negative voltage connection pin of battery 2
Positive voltage connection pin of battery 3
Negative voltage connection pin of battery 3
Positive voltage connection pin of battery 4
Negative voltage connection pin of battery 4
Positive voltage connection pin of battery 5
Input pin for negative power supply
Negative voltage connection pin of battery 5
FET gate connection pin for charge control
Seiko Instruments Inc.
5
5 Page 
BATTERY PROTECTION IC FOR 3-SERIAL TO 5-SERIAL CELL PACK (SECONDARY PROTECTION)
Rev.2.3_00
S-8215A Series
Operation
Remark Refer to " Battery Protection IC Connection Examples".
1. Normal status
If the voltage of each of the batteries is lower than "the overcharge detection voltage n (VCUn) + the overcharge
hysteresis voltage n (VHCn)", the CO pin output changes to "L" (Active "H") or "H" (Active L"). This is called normal
status.
2. Overcharge status
When the voltage of one of the batteries exceeds VCUn during charging under normal conditions and the status is
retained for the overcharge detection delay time (tCU) or longer, the CO pin output changes. This is called overcharge
status. Connecting FET to the CO pin provides charge control and a second protection.
If the voltage of each of the batteries is lower than VCUn + VHCn and the status is retained for 2.0 ms typ. or longer, the
S-8215A Series changes to normal status.
3. Overcharge timer reset
When an overcharge release noise that forces the voltage of one of the batteries temporarily below VCUn is input during
tCU from when VCUn is exceeded to when charging is stopped, tCU is continuously counted if the time the overcharge
release noise persists is shorter than the overcharge timer reset delay time (tTR). Under the same conditions, if the time
the overcharge release noise persists is tTR or longer, counting of tCU is reset once. After that, when VCUn has been
exceeded, counting tCU resumes.
Seiko Instruments Inc.
11
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