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PDF S-8225B Data sheet ( Hoja de datos )
| Número de pieza | S-8225B | |
| Descripción | BATTERY MONITORING IC | |
| Fabricantes | Seiko Instruments | |
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S-8225B Series
www.sii-ic.com
© Seiko Instruments Inc., 2012-2015
BATTERY MONITORING IC
FOR 3-SERIAL TO 5-SERIAL CELL PACK
Rev.1.4_00
The S-8225B 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-8225B Series for 3-serial to 5-serial cell 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)
2.2 V to 3.2 V (100 mV step)
2.2 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
• 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.
• Output logic is selectable.
Active "H", active "L"
• High-withstand voltage element
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) 20 μA max. (Ta = +25°C)
During power-down (V1 = V2 = V3 = V4 = V5 = 1.6 V) 3.0 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, or in 0.2 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.1.4_00
BATTERY MONITORING IC FOR 3-SERIAL TO 5-SERIAL CELL PACK
S-8225B Series
Absolute Maximum Ratings
Table 4
(Ta = +25°C unless otherwise specified)
Item
Symbol
Applied Pin
Absolute Maximum Rating Unit
Input voltage between
VDD pin and VSS pin
VDS
VDD
VSS − 0.3 to VSS + 28
V
VC1, VC2, VC3, VC4, VC5, VC6,
Input pin voltage
VIN
SEL1, SEL2, CTLC, CTLD,
VSS − 0.3 to VDD + 0.3
V
CCT, CDT
Output pin voltage
Power dissipation
Operation ambient temperature
Storage temperature
VOUT
PD
Topr
Tstg
DO, CO
−
−
−
VSS − 0.3 to VDD + 0.3
1100*1
−40 to +85
−40 to +125
V
mW
°C
°C
*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
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.1.4_00
BATTERY MONITORING IC FOR 3-SERIAL TO 5-SERIAL CELL PACK
S-8225B Series
Operation
Remark Refer to " Connection Examples of Battery Monitoring IC".
1. Normal status
When all battery voltages are 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-8225B Series defines the
CO pin output voltage (VCO) and the DO pin output voltage (VDO) as "L" (output logic active "H") or "H" (output logic
active "L"). 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 any one of the battery voltages becomes VCUn or higher, the CO pin output inverts and the S-8225B Series
becomes detection status. This is called overcharge status.
When all battery voltages become overcharge release voltage (VCLn) or lower, the overcharge status is released and
the S-8225B Series returns to normal status.
3. Overdischarge status
When any one of the battery voltages becomes VDLn or lower, the DO pin output inverts and the S-8225B Series
becomes detection status. This is called overdischarge status.
When all battery voltages become overdischarge release voltage (VDUn) or higher, the overdischarge status is
released and the S-8225B Series returns to normal status.
4. CTLC pin and CTLD pin
The S-8225B 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
"H"*1
"L"*2
CTLC Pin
CO Pin
Normal status*3
Detection status
*1. "H": CTLC ≥ VCTLCH
*2. "L": CTLC ≤ VCTLCL
*3. The status is controlled by the voltage detection circuit.
Table 7 Status Set by CTLD Pin
"H"*1
"L"*2
CTLD Pin
DO Pin
Normal status*3
Detection status
*1. "H": CTLD ≥ VCTLDH
*2. "L": CTLD ≤ VCTLDL
*3. The status is controlled by the voltage detection circuit.
Seiko Instruments Inc.
11
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet S-8225B.PDF ] | |
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