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參數(shù)資料
| 型號： | S-8204BAL-TCT1U |
| 元件分類： | 電源管理 |
| 英文描述： | 4-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16 |
| 封裝： | HALOGEN FREE AND LEAD FREE, TSSOP-16 |
| 文件頁數(shù)： | 7/36頁 |
| 文件大小： | 756K |
| 代理商： | S-8204BAL-TCT1U |
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BATTERY PROTECTION IC FOR 3-SERIES OR 4-SERIES CELL PACK
Rev.3.2_00
S-8204B Series
Seiko Instruments Inc.
15
Operation
Remark Refer to “
Connection Examples of Battery Protection IC (cascade connection)”.
1. Normal Status
In the S-8204B Series, both of COP and DOP pins get the VDD level; when all values of battery voltage are in the
range of overdischarge detection voltage (VDLn) to overcharge detection voltage (VCUn), and due to the discharge
current, the VINI pin’s voltage is discharge overcurrent detection voltage (VDIOV1) or less. This is the normal status.
In addition, the charge/discharge FETs are on.
2. Overcharge Status
In the S-8204B Series, any voltage of the batteries increases to the level of VCUn or more, the COP pin is set in high
impedance. This is the overcharge status. The COP pin is pulled down to EB
by an external resistor so that the
charge FET is turned off and it stops charging.
This overcharge status is released if either condition 1 or 2 is satisfied;
(1) In case that the VMP pin voltage is 39/40
× VDS or more; all voltages of the batteries are in the level of
overcharge release voltage (VCLn) or less.
(2) In case that the VMP pin voltage is 39/40
× VDS or less; all voltages of the batteries are in the level of VCUn or
less.
3. Overdischarge Status
In the S-8204B Series, when any voltage of the batteries decreases to the level of VDLn or less, the DOP pin voltage
gets the VSS level. This is the overdischarge status. The discharge FET is turned off and it stops discharging.
This overcharge status is released/maintained if either condition 1 to 3 is satisfied;
(1) To release; the VMP pin voltage is in the VDD level or more, all voltages of the batteries are in the VDLn level or
more.
(2) To release; the VMP pin voltage is VDS/2 or more and the VMP pin voltage is in the VDD level or less, all
voltages of the batteries are in the level of overdischarge release voltage (VDUn) or more.
(3) The VMP pin voltage is VDS/2 or less, the S-8204B Series maintains the power-down status.
4. Power-down Status
In the S-8204B Series, either the products with power-down function or those without power-down function can be
selected.
4. 1 Product with power-down function
When the S-8204B Series reaches the overdischarge status, the VMP pin is pulled down to the VSS level by a
resistor between VMP and VSS pin (RVMS). If the VMP pin voltage decreases to the level of VDS/2 or less, almost
every circuit in the S-8204B Series stops working so that the current consumption decreases to the level of
current consumption at power down (IPDN) or less. This is the power-down status.
The power-down status is released if the following condition is satisfied.
(1) The VMP pin voltage gets VDS/2 or more.
4. 2 Product without power-down function
The VMP pin is not pulled down even when the S-8204B Series reaches the overdischarge status. The
overdischarge status is maintained even If the VMP pin voltage decreases to the level of VDS/2 or less, and the
current consumption decreases to the level of current consumption during overdischarge (IOPED) or less.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| S-8204BAQ-TCT1S | 制造商:Seiko Instruments Inc (SII) 功能描述: |
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| S-8205A | 制造商:SII 制造商全稱:Seiko Instruments Inc 功能描述:4-5節(jié)鐳離子可充電池保護(hù)IC |
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