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參數(shù)資料
| 型號： | S-8241ACJPN-KCJ-TFG |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5 |
| 封裝： | SON-5 |
| 文件頁數(shù)： | 5/32頁 |
| 文件大?。?/td> | 1009K |
| 代理商： | S-8241ACJPN-KCJ-TFG |
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BATTERY PROTECTION IC FOR 1-CELL PACK
Rev.4.1_01
S-8241 Series
Seiko Instruments Inc.
13
Operation
Remark Refer to the “
Battery Protection IC Connection Example”.
Normal Condition
The S-8241 monitors the voltage of the battery connected to VDD and VSS pins and the voltage difference
between VM and VSS pins to control charging and discharging. When the battery voltage is in the range
from the overdischarge detection voltage (VDL) to the overcharge detection voltage (VCU), and the VM pin
voltage is in the range from the charger detection voltage (VCHA) to the overcurrent 1 detection voltage
(VIOV1) (the current flowing through the battery is equal to or lower than a specified value), the IC turns both
the charging and discharging control FETs on. This condition is called normal condition and in this condition
charging and discharging can be carried out freely.
Overcurrent Condition
When the discharging current becomes equal to or higher than a specified value (the VM pin voltage is
equal to or higher than the overcurrent detection voltage) during discharging under normal condition and
the state continues for the overcurrent detection delay time or longer, the S-8241 turns the discharging
control FET off to stop discharging. This condition is called overcurrent condition. (The overcurrent
includes overcurrent 1, overcurrent 2, or load short-circuiting.)
The VM and VSS pins are shorted internally by the RVMS resistor under the overcurrent condition. When a
load is connected, the VM pin voltage equals the VDD voltage due to the load.
The overcurrent condition returns to the normal condition when the load is released and the impedance
between the EB+ and EB- pins (see the figure 10 for a connection example) becomes higher than the
automatic recoverable impedance (see the equation [1] below). When the load is removed, the VM pin
goes back to the VSS potential since the VM pin is shorted the VSS pin with the RVMS resistor. Detecting that
the VM pin potential is lower than the overcurrent 1 detection voltage (VIOV1), the IC returns to the normal
condition.
Automatic recoverable impedance = {Battery voltage / (Minimum value of overcurrent 1 detection voltage) -
1} x (RVMS maximum value) --- [1]
Example: Battery voltage = 3.5 V and overcurrent 1 detection voltage (VIOV1) = 0.1 V
Automatic recoverable impedance = (3.5 V / 0.07 V -1) x 200 k
= 9.8 M
Remark The automatic recoverable impedance varies with the battery voltage and overcurrent 1 detection voltage
settings. Determine the minimum value of the open load using the above equation [1] to have automatic
recovery from the overcurrent condition work after checking the overcurrent 1 detection voltage setting for the
IC.
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| S-8241ACKMC-GCKT2G | 功能描述:電池管理 Lithium-Ion battery protection (1 cell) RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| S-8241ACLMC-GCLT2G | 功能描述:電池管理 Lithium-Ion battery protection (1 cell) RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| S-8241ACNMC-GCNT2G | 功能描述:電池管理 Lithium-Ion battery protection (1 cell) RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| S-8241ACNPN-KCNTFG | 制造商:Seiko Instruments Inc (SII) 功能描述:LITHIUM-ION BATTERY PROTECTION (1 CELL) - Tape and Reel |
| S-8241ACOMC-GCOT2G | 功能描述:電池管理 Lithium-Ion battery protection (1 cell) RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
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