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參數(shù)資料
| 型號(hào)： | S8233B |
| 廠商： | Seiko Instruments Inc. |
| 英文描述： | BATTERY PROTECTION IC (FOR A 3-SERIAL-CELL PACK) |
| 中文描述： | 電池保護(hù)IC（進(jìn)行為期3串電池組） |
| 文件頁數(shù)： | 13/27頁 |
| 文件大?。?/td> | 232K |
| 代理商： | S8233B |
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Battery Protection IC(for a 3-serial-cell pack)
S-8233B Series
21 August,1997
Seiko Instruments Inc.
12
Description
Normal condition
This IC monitors the voltages of the three serially-connected batteries and the discharge current to
control charging and discharging. If the voltages of all the three batteries are in the range from the over
discharge detection voltage (VDD) to the over charge detection voltage (VCU), and the current flowing
through the batteries becomes equal or lower than a specified value (the VMP terminal voltage is equal
or lower than over current detection voltage 1), the charging and discharging FETs turn on. In this
condition, charging and discharging can be carried out freely. This condition is called the normal
condition. In this condition, the VMP and VCC terminals are shorted by the Rvcm resistor.
Over current condition
This IC is provided with the three over current detection levels (VIOV1,VIOV2 and VIOV3) and the three
over current detection delay time (TIOV1,TIOV2 and TIOV3) corresponding to each over current
detection level.
If the discharging current becomes equal to or higher than a specified value (the VMP terminal voltage
is equal to or higher than the over current detection voltage) during discharging under normal condition
and it continues for the over current detection delay time (TIOV) or longer, the discharging FET turns off
to stop discharging. This condition is called an over current condition. The VMP and VCC terminals are
shorted by the Rvcm resistor at this time. The charging FET turns off.
When the discharging FET is off and a load is connected, the VMP terminal voltage equals the VSS
potential.
The over current condition returns to the normal condition when the load is released and the impedance
between the EB- and EB+ terminals (see Figure 7 for a connection example) is 100M
or higher.
When the load is released, the VMP terminal, which and the VCC terminal are shorted with the Rvcm
resistor, goes back to the VCC potential. The IC detects that the VMP terminal potential returns to over
current detection voltage 1 (VIOV1) or lower (or the over current detection voltage 2 (VIOV2) or lower if
the COVT terminal is fixed at the 'L' level and over current detection 1 is inhibited) and returns to the
normal condition.
Over charge condition
If one of the battery voltages becomes higher than the over charge detection voltage (VCU) during
charging under normal condition and it continues for the over charge detection delay time (TCU) or
longer, the charging FET turns off to stop charging. This condition is called the over charge condition.
The 'H' level signal is output to the conditioning terminal corresponding to the battery which exceeds the
over charge detection voltage until the battery becomes equal to lower than the over charge release
voltage (VCD). The battery can be discharged by connecting an Nch FET externally. The discharging
current can be limited by inserting R11, R12 and R13 resistors (see Figure 7 for a connection example).
The VMP and VCC terminals are shorted by the Rvcm resistor under the over charge condition.
The over charge condition is released in two cases:
1) The battery voltage which exceeded the over charge detection voltage (VCU) falls below the over
charge release voltage (VCD), the charging FET turns on and the normal condition returns.
2) If the battery voltage which exceeded the over charge detection voltage (VCU) is equal or higher
than the over charge release voltage (VCD), but the charger is removed, a load is placed, and
discharging starts, the charging FET turns on and the normal condition returns.
The release mechanism is as follows: the discharge current flows through an internal parasitic
diode of the charging FET immediately after a load is installed and discharging starts, and the VMP
terminal voltage decreases by about 0.6 V from the VCC terminal voltage momentarily. The IC
detects this voltage (over current detection voltage 1 or higher), releases the over charge condition
and returns to the normal condition.
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| S8233C | BATTERY PROTECTION IC FOR 3-SERIAL-CELL PACK |
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| S82S19 | 576-BIT BIPOLAR RAM (64 X 9) |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| S-8233B | 制造商:SII 制造商全稱:Seiko Instruments Inc 功能描述:BATTERY PROTECTION IC (FOR A 3-SERIAL-CELL PACK) |
| S-8233B_1 | 制造商:SII 制造商全稱:Seiko Instruments Inc 功能描述:BATTERY PROTECTION IC FOR 3-SERIAL-CELL PACK |
| S-8233BAFT | 制造商:SII 制造商全稱:Seiko Instruments Inc 功能描述:BATTERY PROTECTION IC (FOR A 3-SERIAL-CELL PACK) |
| S-8233BAFT-TB | 功能描述:電池管理 4.225V 3-Cell Serial 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-8233BAFT-TB-G | 功能描述:電池管理 4.225V 3-Cell Serial 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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