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參數(shù)資料
| 型號： | MAX1906SEGE |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | Li+ Battery-Pack Protector with Integrated Fuse Driver |
| 中文描述： | 4-CHANNEL POWER SUPPLY SUPPORT CKT, CQCC16 |
| 封裝： | 5 X 5 MM, 0.90 MM HEIGHT, QFN-16 |
| 文件頁數(shù)： | 10/14頁 |
| 文件大?。?/td> | 325K |
| 代理商： | MAX1906SEGE |
M
Protection Features
Overvoltage Detection
If any cell voltage exceeds the overvoltage threshold,
the MAX1906 stops sampling and monitors the cell volt-
age continuously. If the overvoltage condition persists
for more than 2.1s, the device turns on an internal SCR
and also drives the DRV pin high. The internal SCR or
the external MOSFET sinks sufficient current to blow the
three-terminal protection fuse and permanently open
the battery pack
’
s charge path. See the overvoltage
protection flowchart in Figure 8. Also see the
Fuse
Drive Options
section for discussion on current capabil-
ity for both the internal SCR and external MOSFET.
The MAX1906 remains in overvoltage mode until the
cell voltage drops to 90% of the overvoltage threshold
(V
REL
) and the rest of cells are below the overvoltage
threshold. The DRV pin then goes low, which turns off
an external MOSFET. The internal SCR does not
unlatch until power is removed.
Disconnected Pin Detection
The MAX1906 tests for disconnected voltage sense pins
each time it exits the standby or test mode. To check for
a disconnection, the MAX1906 applies a 10μA current
source to each B_P pin. A disconnected pin is detected
if the B_P pin under test falls to within 1.2V of the cell
’
s
negative terminal. The DISCON pin is then pulled low.
This condition persists while the MAX1906 is in normal
operating mode, and resets only when the MAX1906
enters the standby or test mode. See Figure 9 for the
disconnected pin detection flowchart.
Li+ Battery-Pack Protector with
Integrated Fuse Driver
10
______________________________________________________________________________________
STOP SAMPLING
AND START 2.1s
TIMER AND MONITOR
CELL CONTINUOUSLY
DRV = H
SCR LATCHED
WAIT
2.56s
DRV = L
SAMPLE B_P
SAMPLE MODE
B_P > V
CONTINUOUSLY
AND TIMER = 2.1s
B_P < V
AND THE
REST B_P < V
OV_TH
B_P > V
OV_TH
ALL CELLS CHECKED
YES
YES
YES
YES
NO
NO
NO
NO
DISCON = H
DISCON = L
CHECK DISCONNECTION
OF B_P PIN
SAMPLE MODE
EXIT FROM STANDBY MODE OR TEST MODE
ALL PINS CHECKED
IS B_P AT LEAST 1.2V ABOVE
NEGATIVE TERMINAL
YES
YES
NO
NO
Figure 8. Overvoltage Protection
Figure 9. Disconnected Pin Description
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| MAX1906V | Li+ Battery-Pack Protector with Integrated Fuse Driver |
| MAX1906VEGE | Li+ Battery-Pack Protector with Integrated Fuse Driver |
| MAX1906X | Li+ Battery-Pack Protector with Integrated Fuse Driver |
| MAX1924 | Advanced Li+ Battery-Pack Protectors |
| MAX1894XEEE | Advanced Li+ Battery-Pack Protectors |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1906VEEE | 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 |
| MAX1906VEGE | 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 |
| MAX1906VEGE-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 |
| MAX1906XEEE | 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 |
| MAX1906XEGE | 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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