s-8209a Seiko Instruments Inc., s-8209a Datasheet

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s-8209a

Manufacturer Part Number
s-8209a
Description
Battery Protection Ic With Cell-balance Function
Manufacturer
Seiko Instruments Inc.
Datasheet
Rev.1.0
BATTERY PROTECTION IC
WITH CELL-BALANCE FUNCTION
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
• Lithium-ion rechargeable battery packs
• Lithium polymer rechargeable battery packs
Features
Applications
Packages
SNT-8A
8-Pin TSSOP
• Overcharge detection voltage
• Overcharge release voltage
• Cell-balance detection voltage
• Cell-balance release voltage
• Overdischarge detection voltage
• Overdischarge detection voltage
*1. Overcharge release voltage = Overcharge detection voltage − Overcharge hysteresis voltage
*2. Overcharge detection voltage > Cell-balance detection voltage
*3. Cell-balance release voltage = Cell-balance detection voltage − Cell-balance hysteresis voltage
*4. Overdischarge release voltage = Overdischarge detection voltage + Overdischarge hysteresis voltage
Package Name
High-accuracy voltage detection circuit
Settable delay time by external capacitor for output pin
Control charging, discharging, cell-balance by CTLC, CTLD pins
Two types of cell-balance function; charge/discharge
Wide range of operation temperature
Low current consumption
Small package
Lead-free product
(Overcharge hysteresis voltage is selectable in 0 V, or in 0.1 V to 0.4 V in 50 mV step.)
(Overcharge detection voltage is always set higher than Cell-balance detection voltage)
(Cell-balance hysteresis voltage is selectable in 0 V, or in 0.1 V to 0.4 V in 50 mV step.)
(Overdischarge hysteresis voltage is selectable in 0 V, in 0.1 V to 0.7 V in 100 mV step.)
_00
PH008-A
Package
FT008-A
3.9 V to 4.4 V (5 mV step)
3.8 V to 4.4 V
3.9 V to 4.4 V (5 mV step)
3.8 V to 4.4 V
2.0 V to 3.0 V (10 mV step)
2.0 V to 3.4 V
−40°C to +85°C
7.0 µA max.
SNT-8A, 8-Pin TSSOP
Seiko Instruments Inc.
The S-8209A Series is a protection IC for lithium-ion / lithium
polymer rechargeable batteries and includes a high-accuracy
voltage detection circuit and a delay circuit.
This IC has a transmission function and two types of cell-balance
function so that users are also able to configure a protection circuit
with series multi-cell.
PH008-A
FT008-E
Tape
*1
*3
*4
Drawing Code
*2
Accuracy ±25 mV
Accuracy ±50 mV
Accuracy ±25 mV
Accuracy ±50 mV
Accuracy ±50 mV
Accuracy ±100 mV
PH008-A
FT008-E
Reel
S-8209A Series
PH008-A
Land
1

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s-8209a Summary of contents

Page 1

... Packages Package Name SNT-8A 8-Pin TSSOP The S-8209A Series is a protection IC for lithium-ion / lithium polymer rechargeable batteries and includes a high-accuracy voltage detection circuit and a delay circuit. This IC has a transmission function and two types of cell-balance function so that users are also able to configure a protection circuit with series multi-cell ...

Page 2

... BATTERY PROTECTION IC WITH CELL-BALANCE FUNCTION S-8209A Series Block Diagram 400 nA CTLD 400 nA CTLC Remark The diodes in the IC are parasitic diodes. 2 Delay circuit Overcharge detection comparator + − Cell-balance detection comparator + − Overdischarge detection comparator Figure 1 Seiko Instruments Inc. Rev.1.0 8.31 MΩ + − ...

Page 3

... Rev.1.0 _00 Product Name Structure 1. Product Name S-8209A XX - XXXX G *1. Refer to the tape specifications at the end of this book. 2. Product Name List (1) SNT-8A Overcharge detection Product name / Item voltage S-8209AAA-I8T1G 4.100 V Remark Please contact our sales office for the products with detection voltage value other than those specified above. ...

Page 4

... BATTERY PROTECTION IC WITH CELL-BALANCE FUNCTION S-8209A Series Pin Configurations SNT-8A Top view Figure 2 8-Pin TSSOP Top view Figure 3 4 Pin No. Symbol 1 CTLC 2 CTLD 3 VDD 4 CDT 5 VSS Remark For the external views, refer to the package drawings. ...

Page 5

... D − T opr − T stg 800 600 8-Pin TSSOP 400 200 SNT-8A 0 100 50 0 Ambient Temperature (Ta) [°C] Seiko Instruments Inc. S-8209A Series (Ta = 25°C unless otherwise specified) Absolute Maximum Ratings −0 + −0 +0 −0 +0 −0 +24 ...

Page 6

... Sink current CO I COL Sink current DO I DOL *1. In the S-8209A Series, users are able to set delay time for the output pins. By using the following formula, delay time is calculated with the value of CDT pin’s resistance in the IC (R [s] = −ln (1− ...

Page 7

... Seiko Instruments Inc. S-8209A Series CTLC CB CTLD CO S-8209A Series DO VDD CDT VSS A COM Figure 6 Test circuit 2 100 kΩ CTLC CB CTLD CO S-8209A Series DO VDD CDT VSS Figure 8 Test circuit 4 CTLC CB CTLD CO S-8209A Series VDD DO CDT VSS A A COM Figure 10 Test circuit 6 100 kΩ ...

Page 8

... BATTERY PROTECTION IC WITH CELL-BALANCE FUNCTION S-8209A Series CTLC CB CTLD CO S-8209A Series DO VDD CDT VSS COM Figure 11 Test circuit Seiko Instruments Inc. Rev.1.0 _00 ...

Page 9

... BATTERY PROTECTION IC WITH CELL-BALANCE FUNCTION Rev.1.0 _00 Operation Figure 12 shows the operation transition of S-8209A High High-Z Charge * ≥ High ≥ High ≥ Discharge High *1. Operation of charge cell-balance function *2 ...

Page 10

... V or less CTLD CTLDL 5. Delay Circuit In the S-8209A Series, users are able to set delay time which is from detection of changes in V output to the CO, DO, CB pin. For example in the detection of overcharge status, when V C starts via the voltage between CDT and VSS (V ...

Page 11

... Example of Protection Circuit with S-8209A for Series Multi-Cells Figure 13 shows the example of protection circuit with the S-8209A for series multi-cells. Regarding the operation of protection circuit with the S-8209A for series-connected batteries, refer to the application note “S-8209A Series Usage Guidelines”. ...

Page 12

... BATTERY PROTECTION IC WITH CELL-BALANCE FUNCTION S-8209A Series Precautions • The application conditions for the input voltage, output voltage, and load current should not exceed the package power dissipation. • Do not apply an electrostatic discharge to this IC that exceeds the performance ratings of the built-in electrostatic protection circuit. • ...

Page 13

... DU 2.82 2.78 2.74 2.70 2.66 2.62 −40 − [°C] BATTERY PROTECTION IC WITH CELL-BALANCE FUNCTION ( [° Seiko Instruments Inc. S-8209A Series − V OPE [V] DS − 4.04 4.02 4.00 3.98 3.96 3.94 −40 − ...

Page 14

... BATTERY PROTECTION IC WITH CELL-BALANCE FUNCTION S-8209A Series pin current − 3.5 V) COL CO DS 2000 1750 1500 1250 1000 750 500 250 0 0 0.5 1.0 − 4.5 V) CBH CB DS 2000 1750 1500 1250 1000 750 500 250 0 0 0.5 1.0 1.5 2.0 2.5 4. CTLC / CTLD pin current − ...

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... Use of the information described herein for other purposes and/or reproduction or copying without the express permission of Seiko Instruments Inc. is strictly prohibited. The products described herein cannot be used as part of any device or equipment affecting the human body, such as exercise equipment, medical equipment, security systems, gas equipment, or any apparatus installed in airplanes and other vehicles, without prior written permission of Seiko Instruments Inc ...

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