Li-ion Battery Protection IC
SII IC
Li-ion Battery Protection IC
MaR., 2011
Seiko Instruments Inc.
PP TmPL001
Seiko Holdings Group
1881 Kintaro Hattori established K. Hattori & Co., Ltd. (currently Seiko Holdings Corporation), a watch and clock retail store. 1892 K. Hattori & Co., Ltd. established Seikosha Co., Ltd. and began production of clocks. 1937 Daini Seikosha Co., Ltd. (currently Seiko Instruments Inc.) was established as the watch manufacturer for the SEIKO Group. 2009 SII became a wholly-owned subsidiary of Seiko Holdings Corporation
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History of SII Components Business
1960 1970 1980
TN GH LCD LCD
1990
STN FSTN LCD LCD
2000
TFT LCD
LCD/ Custom Module
1937 Establishment CMOS IC
Mechanical Watch Self-winding Watch CMOS IC for timepieces CMOS IC Driver Sensor Micro E2PROM for IC IC Computer Power IC Supply
Quartz Crystal
Quartz Crystal Oscillator
SMD-type Crystal Unit
Quartz Crystal Micro Battery
Components Business has been developed since late 60s.
Silver Oxide Lithium Micro Battery Coin Battery
Polyacene Capacitor
MS Rechargeable Battery
XC Reflowable Capacitor
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Advantages of SII Components
Advanced Precision Processing Technology for Timepiece Has Developed State-of-art Electronics Components
Small Slim
Precision Processing Technology
Low Voltage Operation
Low Power Consumption
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Policy
1. Low Current Consumption
- 025 μA Real Time Clock - 0.35 μA Voltage Detector - 1.6 μA 5-cell Li protection
2. Low Voltage Operation
- 0.3V Charge pump - 0.65V Voltage Detector - 0.9V EEPROM - 1.1V Real Time Clock - 0V Li Battery Charge Function
3. Small Package
SOT-23/SC-82AB → SNT → WLP/CSP
High accuracy: 0.5% Li protection, VD High Output Current: 1A in LDO High Input Voltage : 50V LDO
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Product Line-up
CMOS
Power Management
Lithium-ion Protection IC Voltage Detector Switching Regulator Charge Pump
Voltage Regulator (LDO)
Memory Sensor
EEPROM
Temperature Sensor
Hall Sensor
Timepiece Analogue Logic
Real Time Clock
Op Amp
Comparator
Single Gate Logic
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Li-ion Battery Application and Protection IC
1-cell pack (3.6 V average) 2-cell pack (7.2 V average) 3-cell pack 4-cell pack 5-cell pack
(10.8 V average) (14.4 V average) (18 V average)
Mobile phone PHS MD iPod
VCR DVC DSC PDA S-8242 S-8232
PC S-8253 S-8233
PC
Cascade
S-8211 S-8261 S-8241 S-8209
Cascade
S-8204 S-8254 S-8243
S-8205
S-8244
Secondary protection S-8264 Secondary protection
S-8215 Secondary protection
Seiko Instruments Inc.
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1 Cell Application (S-8261)
EB+
VDD
Less influence against RF noise.
VSS DO
SOT-23-6 PKG S-8261 Series
DP
Test time can be reduced.
CO
VM
Maximum absolute rating EB? = 28V
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Seiko Instruments Inc.
2 Cells Application (S-8242)
Use only 3 resistors and 2 capacitor
EB+
VDD
VC
S-8242 Series
Build-in delay circuit ( No capacitor required )
VSS DO CO VM
Low current consumption 5.0 uA typical.
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－ＢＥ
Seiko Instruments Inc.
3 / 4 Cells Application (S-8254)
EB+ RVMP RCOP RDOP 1 COP 2 VMP 3 DOP 4 VINI VDD 16 CVC1 VC1 15 CVC2 VC2 14 CVC3 VC3 13 RVC2 RVC3 RVC4 RCTL 7 VSS CCDT 8 NC CCCT RVSS NC 9 SEL 10 RSEL SEL CTL RVC1
S-8254
5 CDT 6 CCT RVINI VC4 12 CTL 11
CVC4 CVSS
EB-
RSENSE
High accuracy overcurrent detection
3-cell/4-cell can be selected
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Features of S-8205
?Overcharge detection voltage 3.55 V to 4.40 V ?Independent charge and discharge control by the control pins or by PTC ?Discharge overcurrent detection in 2-step Discharge over current detection voltage 0.05 V to 0.30 V Short circuit detection voltage 0.50 V to 1.0 V ?charge over current protection function. ?Settable delay time for Overcharge ,Overdischarge , Discharge overcurrent, Charge overcurrent. ?Charge and Discharge path easy to Separated ?IC Pin Disconnection Detect Function
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Seiko Instruments Inc.
Features of S-8215A/B
?Overcharge detection voltage 3.60 V to 4.70 V Accuracy : ±25 mV (+25 ℃) ?Delay times for overcharge detection can be set by an internal circuit ?Output form is selectable : CMOS output, Nch open-drain output, Pch open- drain output ?Output logic is selectable : Active "H", Active "L" ?Low current consumption 1.6uA ( Typ ) S-8215A 4.2uA ( Typ ) S-8215B ?IC Pin Disconnection Detect Function S-8215B
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Multi cells Application (more than 5 cells) - Power Tool
- Electric Vehicle - Uninterruptible Power Supply
5-cell to 12-cell (18V to 43.2V average)
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Multi cells Application (more than 4 cells)
12 cell example
Cascade Solution
Logic circuit IC1 IC2
1 Chip Solution
Protection IC
SCL SDA VDD IC3 IC4 IC5 IC6 IC7 IC8 VDD IC9 IC10 VSS Control circuit IC11 IC12
MCU IIC
Vgs = VDD = 50.4V
Vgs=VDD< 50.4V
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SII’s Solution Over 4cell Application by Cascading
Low side Nch control 2-Cascade 3-Cascade
VDD1
VSS1
Vgs = VDD1 = 16.8V
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SII’s Solution Over 4cell Application by Cascading
High side Pch control 2-Cascade 3-Cascade
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Which one?
S-8204
From 3 cell to ‥‥‥
S-8209
From 2 cell to ‥‥‥
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Features of S-8204
Pch FET Control (S-8204A) Nch FET Control (S-8204B)
by Charge Control Terminal and Discharge Control Terminal
- Charging and Discharging Control independently - Over-current Detection by Sense Resistor Over-discharging Current Detection(S-8204A/B) Over-charging Current Detection(S-8204A) - Low Current Consumption Operation : 33uA max. (RT) Power Down : 0.1uA max. (RT) - Operation Temperature Range -40 to +85 degree - PKG : 16-Pin TSSOP
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Features of S-8209
- Nch Open Drain Output (S-8209A) Pch Open Drain Output (S-8209B) - Charging and Discharging Control independently
by Charge Control Terminal and Discharge Control Terminal
- Two types cell balance function - Low Current Consumption Operation : 7.0uA max. (RT) - Operation Temperature Range -40 to +85 degree - PKG : SNT-8 , 8-Pin TSSOP
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More challenge…
Easily Upgrade Cell Balance Disconnection Protection Over Temperature Protection High Input LDO
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Seiko Instruments Inc.