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PDF S-8225A Data sheet ( Hoja de datos )
| Número de pieza | S-8225A | |
| Descripción | BATTERY MONITORING IC | |
| Fabricantes | Seiko Instruments | |
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S-8225A Series
www.sii-ic.com
© Seiko Instruments Inc., 2012-2015
BATTERY MONITORING IC
FOR 3-SERIAL TO 5-SERIAL CELL PACK
Rev.1.7_00
The S-8225A Series includes high-accuracy voltage detection circuits and delay circuits, and can monitor the status of
3-serial to 5-serial cell lithium-ion rechargeable battery in single use. By switching the voltage level which is applied to the
SEL1 pin and SEL2 pin, users are able to use the S-8225A Series for 3-serial to 5-serial cell pack.
By cascade connection using the S-8225A Series, it is also possible to protect 6-serial or more cells lithium-ion rechargeable
battery pack.
Features
• High-accuracy voltage detection function for each cell
Overcharge detection voltage n (n = 1 to 5)
3.5 V to 4.4 V (50 mV step)
Overcharge release voltage n (n = 1 to 5)
Accuracy ±20 mV (Ta = +25°C), ±30 mV (Ta = 0°C to +60°C)
3.3 V to 4.4 V*1
Accuracy ±50 mV
Overdischarge detection voltage n (n = 1 to 5)
Overdischarge release voltage n (n = 1 to 5)
2.0 V to 3.2 V (100 mV step)
2.1 V to 3.4 V*2
Accuracy ±80 mV
Accuracy ±100 mV
• Overcharge detection delay time and overdischarge detection delay time can be set by external capacitor.
• Switchable between 3-serial to 5-serial cell by using the SEL1 pin and the SEL2 pin
• Cascade connection is available.
• The CO pin and the DO pin are controlled by the CTLC pin and the CTLD pin, respectively.
• Output voltage of the CO pin and the DO pin is limited to 12 V max.
• High-withstand voltage device
Absolute maximum rating: 28 V
• Wide operation voltage range
4 V to 26 V
• Wide operation temperature range
Ta = −40°C to +85°C
• Low current consumption
During operation (V1 = V2 = V3 = V4 = V5 = 3.4 V) 22 μA max. (Ta = +25°C)
During power-down (V1 = V2 = V3 = V4 = V5 = 1.6 V) 4.5 μA max. (Ta = +25°C)
• Lead-free (Sn 100%), halogen-free
*1. 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)
*2. Overdischarge hysteresis voltage n (n = 1 to 5) is selectable in 0 V to 0.7 V in 100 mV step.
(Overdischarge hysteresis voltage = Overdischarge release voltage − Overdischarge detection voltage)
Application
• Lithium-ion rechargeable battery pack
Package
• 16-Pin TSSOP
Seiko Instruments Inc.
1
1 page  
Rev.1.7_00
BATTERY MONITORING IC FOR 3-SERIAL TO 5-SERIAL CELL PACK
S-8225A Series
Absolute Maximum Ratings
Table 4
Item
Symbol
Applied Pin
Input voltage between
VDD pin and VSS pin
VDS VDD
Input pin voltage
VC1, VC2, VC3, VC4, VC5, VC6,
VIN SEL1, SEL2, CTLC, CTLD,
CCT, CDT
Output pin voltage
VOUT
DO, CO
Power dissipation
PD
Operation ambient temperature Topr
Storage temperature
Tstg
*1. When mounted on board
[Mounted board]
(1) Board size: 114.3 mm × 76.2 mm × t1.6 mm
(2) Board name: JEDEC STANDARD51-7
−
−
−
(Ta = +25°C unless otherwise specified)
Absolute Maximum Rating Unit
VSS − 0.3 to VSS + 28
V
VSS − 0.3 to VDD + 0.3
VSS − 0.3 to VDD + 0.3
1100*1
−40 to +85
−40 to +125
V
V
mW
°C
°C
Caution The absolute maximum ratings are rated values exceeding which the product could suffer physical
damage. These values must therefore not be exceeded under any conditions.
1200
1000
800
600
400
200
0
0 50 100 150
Ambient temperature (Ta) [°C]
Figure 3 Power Dissipation of Package (When Mounted on Board)
Seiko Instruments Inc.
5
5 Page 
Rev.1.7_00
BATTERY MONITORING IC FOR 3-SERIAL TO 5-SERIAL CELL PACK
S-8225A Series
Operation
Remark Refer to " Connection Examples of Battery Monitoring IC".
1. Normal status
When the voltage of each of the batteries is in the range from overcharge detection voltage (VCUn) to overdischarge
detection voltage (VDLn), and the CTLC pin input voltage (VCTLC) and the CTLD pin input voltage (VCTLD) are higher
than the CTLC pin voltage "H" (VCTLCH) and the CTLD pin voltage "H" (VCTLDH), respectively, the S-8225A Series
defines each of the CO pin output voltage (VCO) and the DO pin output voltage (VDO) as "H". This is called normal
status.
VCO is defined as the CO pin voltage "H" (VCOH) when it is "H". Similarly, VDO is defined as the DO pin voltage "H"
(VDOH) when it is "H".
2. Overcharge status
When the voltage of one of the batteries becomes VCUn or higher, the CO pin output inverts and the S-8225A Series
becomes detection status. This is called overcharge status.
When the voltage of each of the batteries becomes overcharge release voltage (VCLn) or lower, the overcharge status
is released and the S-8225A Series returns to normal status.
3. Overdischarge status
When the voltage of one of the batteries becomes VDLn or lower, the DO pin output inverts and the S-8225A Series
becomes detection status. This is called overdischarge status.
When the voltage of each of the batteries becomes overdischarge release voltage (VDUn) or higher, the overdischarge
status is released and the S-8225A Series returns to normal status.
4. CTLC pin and CTLD pin
The S-8225A Series has two pins to control.
The CTLC pin controls the output voltage from the CO pin; the CTLD pin controls the output voltage from the DO pin.
Thus it is possible for users to control the output voltages from the CO pin and DO pin, respectively. These controls
precede the battery protection circuit.
Table 6 Status Set by CTLC Pin
CTLC Pin
CO Pin
"H"*1
Normal status*4
Open*2
"L"*3
VSS
VSS
*1. "H": CTLC ≥ VCTLCH
*2. Pulled down by ICTLCH
*3. "L": CTLC ≤ VCTLCL
*4. The status is controlled by the voltage detection circuit.
Table 7 Status Set by CTLD Pin
CTLD Pin
DO Pin
"H"*1
Normal status*4
Open*2
"L"*3
VSS
VSS
*1. "H": CTLD ≥ VCTLDH
*2. Pulled down by ICTLDH
*3. "L": CTLD ≤ VCTLDL
*4. The status is controlled by the voltage detection circuit.
Caution
Note that when the power supply fluctuates, unexpected behavior might occur if an electrical
potential is generated between the potentials of "H" level input to the CTLC / CTLD pins and IC's
VDD by external filters.
Seiko Instruments Inc.
11
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