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參數(shù)資料
| 型號(hào)： | MAX1666VEEP |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | Advanced Lithium-Ion Battery-Pack Protector |
| 中文描述： | 6-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO20 |
| 封裝： | 0.150 INCH, 0.025 INCH PITCH, QSOP-20 |
| 文件頁數(shù)： | 12/16頁 |
| 文件大?。?/td> | 294K |
| 代理商： | MAX1666VEEP |
M
Advanced Lithium-Ion
Battery-Pack Protector
12
______________________________________________________________________________________
Overcharge/Overdischarge
Current Protection
The MAX1666 checks for overcharge or overdischarge
current in standby and sample states. The thresholds
are factory preset to 200mV and 300mV, respectively.
A charge current makes PKN go below GND. A dis-
charge current makes PKN go above GND. When PKN
exceeds the threshold, a fault is acknowledged.
CGO
goes high when the overcharge threshold is exceeded.
DSO
goes high when the overdischarge threshold is
exceeded. An internal 550ms timer starts. At the end of
550ms,
DSO
or
CGO
goes low, while the MAX1666
rechecks for an overcharge/overdischarge fault. A per-
sistent fault causes
DSO
and
CGO
to return high and
restarts the 550ms timer again.
Truth Table
The MAX1666 has a total of eight signal inputs and six
outputs. Table 2 lists all the possible states.
Applications Information
Choosing an External MOSFET
The external P-channel MOSFETs act as a gated switch
to enable or disable the charging/discharging process.
CGO
controls the MOSFET for normal charging of the
battery.
TKO
controls the MOSFET for trickle charge of
the cells.
DSO
controls the discharging MOSFET. Use
different MOSFETs to optimize each function depending
on the maximum charge and discharge rates. Table 3
lists some suitable MOSFETs in a small SO-8 package.
Layout Considerations and Bypassing
As with all printed circuit board designs, a careful lay-
out is suggested. Minimize lead lengths to reduce loss-
es in the traces.
P-CHANNEL MOSFETs
MAXIMUM DRAIN CURRENT (A)
IRF7406
4.7
IRF7404
5.3
Si4431
4.5
Si4947 (dual)
2.5 EA
Table 3. MOSFET Selection
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1666VEEP+ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX1666VEEP+T | 功能描述:電池管理 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 |
| MAX1666VEEP-T | 功能描述:電池管理 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 |
| MAX1666XEEP | 功能描述:電池管理 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 |
| MAX1666XEEP+T | 功能描述:電池管理 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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