Document
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
BATTERY PROTECTION IC FOR 3-SERIAL TO 5-SERIAL CELL PACK (SECONDARY PROTECTION)
S-8215A Series
Rev.2.3_00
Block Diagram
VDD
VC1 VC2 VC3 VC4 VC5 VSS
Overcharge detection comparator 1
+
−
Reference voltage 1
Overcharge detection comparator 2
+
−
Reference voltage 2
Overcharge detection comparator 3
+
−
Control circuit
Reference voltage 3 Overcharge detection comparator 4
+
−
Reference voltage 4 Overcharge detection comparator 5
+
−
Reference voltage 5
Oscillator Overcharge detection / release delay circuit
*1. The CO pin is connected only to Nch transistor in the case of Nch open-drain output. The CO pin is connected only to Pch transistor in the case of Pch open-drain output.
Remark The diodes in the figure are parasitic diodes.
Figure 1
2 Seiko Instruments Inc.
CO*1
BATTERY PROTECTION IC FOR 3-SERIAL TO 5-SERIAL CELL PACK (SECONDARY PROTECTION)
Rev.2.3_00
S-8215A Series
Product Name Structure
1. Product name
S-8215A xx - xxxx U
Environmental code U: Lead-free (Sn 100%), halogen-free
Package abbreviation and IC packing specifications*1 K8T2: TMSOP-8, Tape I8T1: SNT-8A, Tape
Serial code*2 Sequentially set from AA to AZ
*1. Refer to the tape drawing. *2. Refer to "3. Product name list".
2. Packages
Package Name TMSOP-8 SNT-8A
Table 1 Package Drawing Codes
Dimension FM008-A-P-SD PH008-A-P-SD
Tape FM008-A-C-SD PH008-A-C-SD
Reel FM008-A-R-SD PH008-A-R-SD
Land
− PH008-A-L-SD
Seiko In.