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Número de pieza S-8205AAA-TCT1U
Descripción BATTERY PROTECTION IC
Fabricantes Seiko 
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S-8205A/B Series
www.sii-ic.com
© Seiko Instruments Inc., 2010-2013
BATTERY PROTECTION IC
FOR 4-SERIES OR 5-SERIES CELL PACK
Rev.1.5_01
The S-8205A/B Series includes high-accuracy voltage detection circuits and delay circuits, in single use, makes it possible
for users to monitor the status of 4-series or 5-series cell lithium-ion rechargeable battery.
The S-8205A/B Series is suitable for protecting lithium-ion rechargeable battery pack from overcharge, overdischarge, and
overcurrent.
„ Features
High-accuracy voltage detection function for each cell
Overcharge detection voltage n (n = 1 to 5)
3.55 V to 4.40 V*1 (50 mV step)
Overcharge release voltage n (n = 1 to 5)
3.30 V to 4.40 V*2
Overdischarge detection voltage n (n = 1 to 5)
2.0 V to 3.2 V*1 (100 mV step)
Overdischarge release voltage n (n = 1 to 5)
2.0 V to 3.4 V*3
Accuracy ±25 mV
Accuracy ±50 mV
Accuracy ±80 mV
Accuracy ±100 mV
Discharge overcurrent detection in 2-step
Discharge overcurrent detection voltage
Short circuit detection voltage
0.05 V to 0.30 V*4 (50 mV step)
0.50 V to 1.0 V*4 (100 mV step)
Accuracy ±15 mV
Accuracy ±100 mV
Charge overcurrent detection
Charge overcurrent detection voltage
0.30 V to 0.05 V (50 mV step) Accuracy ±30 mV
Settable by external capacitor; Overcharge detection delay time, Overdischarge detection delay time, Discharge
overcurrent detection delay time, Charge overcurrent detection delay time
(Load short circuit detection delay time is internally fixed.)
S-8205A Series: used for 4-series cell, S-8205B Series: used for 5-series cell
Independent charging and discharge control by the control pins
Power-down function "yes" / "no" is selectable.
High-withstand voltage element
Absolute maximum rating : 28 V
Wide range of operation voltage
2 V to 24 V
Wide range of operation temperature
Ta = 40°C to +85°C
Low current consumption
During operation
40 μA max. (Ta = +25°C)
During power-down
Lead-free (Sn 100%), halogen-free*5
0.1 μA max. (Ta = +25°C)
*1. The overcharge detection voltage n (n = 1 to 5) and overdischarge detection voltage (n = 1 to 5) are not selectable
if the voltage difference between them is 0.6 V or less.
*2. Overcharge hysteresis voltage n (n = 1 to 5) is selectable in 0 V, or in 0.1 V to 0.4 V in 50 mV step.
(Overcharge hysteresis voltage = Overcharge detection voltage Overcharge release voltage)
*3. Overdischarge hysteresis voltage n (n = 1 to 5) is selectable in 0 V, or in 0.2 V to 0.7 V in 100 mV step.
(Overdischarge hysteresis voltage = Overdischarge release voltage Overdischarge detection voltage)
*4. The discharge overcurrent detection voltage and load short circuit detection voltage are not selectable if the voltage
difference between them is 0.3 V or less.
*5. Refer to "„ Product Name Structure" for details.
„ Application
Rechargeable lithium-ion battery pack
„ Package
16-Pin TSSOP
Seiko Instruments Inc.
1

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S-8205AAA-TCT1U pdf
Rev.1.5_01
BATTERY PROTECTION IC FOR 4-SERIES OR 5-SERIES CELL PACK
S-8205A/B Series
3. Product Name List
Table 2 S-8205A Series (For 4-Series Cell)
Product Name
Overcharge
Detection
Voltage
[VCU]
Overcharge
Release
Voltage
[VCL]
Overdischarge
Detection
Voltage
[VDL]
Overdischarge
Release
Voltage
[VDU]
Discharge
Overcurrent
Detection
Voltage
[VDIOV]
Load Short
Circuit
Detection
Voltage
[VSHORT]
Charge
Overcurrent
Detection
Voltage
[VCIOV]
0V
Battery
Charge
Function
Power-
down
Function
Delay
Time*1
S-8205AAA-TCT1U 4.225 V 4.125 V 2.30 V 3.00 V 0.15 V 0.50 V 0.10 V Available Yes
(1)
S-8205AAB-TCT1U 4.225 V 4.075 V 2.30 V 3.00 V 0.20 V 0.50 V 0.10 V Available Yes
(1)
*1. The delay time is set by the external capacitor.
But the discharge overcurrent release delay time (tDIOVR) and charge overcurrent release delay time (tCIOVR) are
calculated by discharge overcurrent detection delay time (tDIOV) and charge overcurrent detection delay time (tCIOV) as
the following equations. 1 [ms] (typ.) is the internal delay time of the S-8205A Series.
(1) tDIOVR = tDIOV × 10 + 1 [ms] (typ.), tCIOVR = tCIOV × 10 + 1 [ms] (typ.)
(2) tDIOVR = tDIOV × 0.05 + 1 [ms] (typ.), tCIOVR = tCIOV × 0.05 + 1 [ms] (typ.)
Moreover, refer to "8. Delay Time Setting" in "„ Operation" for calculational methods of delay times.
Remark Please contact our sales office for products with detection voltage values other than those specified above.
Table 3 S-8205B Series (For 5-Series Cell)
Product Name
S-8205BAA-TCT1U
S-8205BAB-TCT1U
S-8205BAC-TCT1U
S-8205BAD-TCT1U
S-8205BAE-TCT1U
S-8205BAF-TCT1U
S-8205BAG-TCT1U
S-8205BAH-TCT1U
S-8205BAI-TCT1U
S-8205BAJ-TCT1U
S-8205BAK-TCT1U
S-8205BAL-TCT1U
S-8205BAP-TCT1U
S-8205BAQ-TCT1U
Overcharge
Detection
Voltage
[VCU]
4.225 V
4.225 V
4.200 V
4.200 V
4.200 V
4.200 V
4.250 V
4.250 V
4.225 V
4.200 V
4.200 V
4.250 V
4.200 V
3.900 V
Overcharge
Release
Voltage
[VCL]
Overdischarge
Detection
Voltage
[VDL]
Overdischarge
Release
Voltage
[VDU]
Discharge
Overcurrent
Detection
Voltage
[VDIOV]
4.125 V 2.30 V 3.00 V 0.15 V
4.075 V 2.30 V 3.00 V 0.20 V
4.100 V 2.50 V 3.20 V 0.10 V
4.000 V 2.70 V 3.00 V 0.15 V
4.100 V 2.50 V 3.20 V 0.15 V
4.050 V 2.70 V 3.00 V 0.20 V
4.150 V 2.70 V 3.00 V 0.20 V
4.050 V 2.00 V 2.50 V 0.15 V
4.075 V 2.30 V 3.00 V 0.10 V
4.100 V 2.50 V 3.20 V 0.10 V
4.000 V 2.70 V 3.00 V 0.15 V
4.100 V 2.70 V 3.00 V 0.15 V
4.100 V 2.50 V 3.20 V 0.10 V
3.750 V 2.00 V 2.70 V 0.20 V
Load Short
Circuit
Detection
Voltage
[VSHORT]
0.50 V
0.50 V
0.80 V
1.00 V
0.50 V
0.50 V
0.50 V
0.50 V
0.50 V
0.80 V
1.00 V
0.50 V
0.80 V
0.50 V
Charge
Overcurrent
Detection
Voltage
[VCIOV]
0V
Battery
Charge
Function
0.10 V Available
0.10 V Available
0.10 V Available
0.10 V Available
0.10 V Available
0.20 V Available
0.20 V Available
0.10 V Available
0.05 V Unavailable
0.10 V Available
0.10 V Available
0.10 V Available
0.10 V Available
0.15 V Available
Power-
down
Function
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Delay
Time*1
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(2)
(2)
(2)
(1)
*1. The delay time is set by the external capacitor.
But the discharge overcurrent release delay time (tDIOVR) and charge overcurrent release delay time (tCIOVR) are
calculated by discharge overcurrent detection delay time (tDIOV) and charge overcurrent detection delay time (tCIOV) as
the following equations. 1 [ms] (typ.) is the internal delay time of the S-8205B Series.
(1) tDIOVR = tDIOV × 10 + 1 [ms] (typ.), tCIOVR = tCIOV × 10 + 1 [ms] (typ.)
(2) tDIOVR = tDIOV × 0.05 + 1 [ms] (typ.), tCIOVR = tCIOV × 0.05 + 1 [ms] (typ.)
Moreover, refer to "8. Delay Time Setting" in "„ Operation" for calculational methods of delay times.
Remark Please contact our sales office for products with detection voltage values other than those specified above.
Seiko Instruments Inc.
5

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S-8205AAA-TCT1U arduino
Rev.1.5_01
BATTERY PROTECTION IC FOR 4-SERIES OR 5-SERIES CELL PACK
S-8205A/B Series
2. 8 Load Short Circuit Detection Delay Time (tSHORT)
Load short circuit detection delay time (tSHORT) is a period in which VDO changes to "L" after changing V6 to 1.5 V
instantaneously, after setting S3 to ON from the initial status 1.
2. 9 CTLC Pin Response Time (tCTLC)
CTLC pin response time (tCTLC) is a period in which VCO changes to "L" after changing V7 = VDS instantaneously
from the initial status 1.
2. 10 CTLD Pin Response Time (tCTLD)
CTLD pin response time (tCTLD) is a period in which VDO changes to "L" after changing V8 = VDS instantaneously
from the initial status 1.
3. CCT Pin Internal Resistance, CDT Pin Internal Resistance, CIT Pin Internal Resistance, CCT Pin
Detection Voltage, CDT Pin Detection Voltage, CIT Pin Detection Voltage (Test Circuit 3)
Confirm both VCO and VDO are in "H" after setting V1 = V2 = V3 = V4 = 3.5 V (S-8205A Series), V1 = V2 = V3 = V4 =
V5 = 3.5 V (S-8205B Series), V6 = V9 = V10 = V11 = 0 V (this status is referred to as initial status 2).
3. 1 CCT Pin Internal Resistance (RCCT)
The CCT pin internal resistance (RCCT) can be defined by RCCT = VDS / ICCT by using ICCT when setting V1 = 4.5 V
from the initial status 2.
3. 2 CDT Pin Internal Resistance (RCDT)
The CDT pin internal resistance (RCDT) can be defined by RCDT = VDS / ICDT by using ICDT when setting V1 = 1.5 V
from the initial status 2.
3. 3 CIT Pin Internal Resistance (RCIT)
The CIT pin internal resistance (RCIT) can be defined by RCIT = VDS / ICIT by using ICIT when setting V6 = VDIOV +
0.015 V from the initial status 2.
3. 4 CCT Pin Detection Voltage (VCCT)
The CCT pin detection voltage (VCCT) is V9 when VCO is set to "L" after increasing V9 gradually, after setting V1 =
4.5 V from the initial status 2.
3. 5 CDT Pin Detection Voltage (VCDT)
The CDT pin detection voltage (VCDT) is V10 when VDO is set to "L" after increasing V10 gradually, after setting V1
= 1.5 V from the initial status 2.
3. 6 CIT Pin Detection Voltage (VCIT)
The CIT pin detection voltage (VCIT) is V11 when VDO is set to "L" after increasing V11 gradually, after setting V6 =
VDIOV + 0.015 V from the initial status 2.
Seiko Instruments Inc.
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