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參數(shù)資料
| 型號： | LM3621 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Single Cell Lithium-Ion Battery Charger Controller |
| 中文描述： | 單節(jié)鋰離子電池充電控制器 |
| 文件頁數(shù)： | 12/14頁 |
| 文件大?。?/td> | 334K |
| 代理商： | LM3621 |
Application Information
(Continued)
Fault Protection
LM3621 provides redundant fault protection for a Li-Ion bat-
tery pack. If the charger’s control loop is accidentally
opened, the regulation voltage will begin to increase beyond
the level that are safe for the battery. In order to protect the
battery from a fault condition, PFD goes low to turn off the
series pass FET whenever the voltage across the battery ex-
ceeds the over voltage detection threshold (V
-Det) or
whenever V
exceeds 1V. A fault condition also causes
both of the LED drivers to pulse at 0.8 Hz. Enable must go
low to cause the LM3621 to transition from the Fault State to
Standby mode.
Low Current Drain of Battery
If power is inadvertently removed from the battery charger,
the voltage at the V
pin will collapse to the same potential
as the V
pin. An internal switch will disconnect the circuitry
of the LM3621 from the V
+ pin so that no more than 1μA
(typical) of leakage current will be drawn from the battery.
Adjustable Charge Current
The current sense resistor (Rcs) converts the charging cur-
rent to a voltage level, V
. Applying an external voltage
source (V
) to the I
pin will adjust the value of V
for
Fast Charge current regulation. Simultaneously the regula-
tion level for Boost mode, Hi-Z Charge mode, End-of-Charge
threshold and over current detect threshold will also be ad-
justed accordingly. The voltage at I
pin should be within
the range of 1V
≥
V
ISET
≥
0.1V. The transfer functions of
V
CSR
to V
ISET
are:
Fast Charge Mode, V
CSR
= 0.933·V
ISET
Hi-Z Mode, V
CSR
= 0.083·V
ISET
Boost Mode, V
CSR
= 0.48·V
ISET
+0.65
Over Current Threshold, V
CSR
= 0.36·V
ISET
+0.79
End-Of-Charge, V
CSR
= 0.07·V
ISET
DS100107-5
FIGURE 5. Battery Refresh
DS100107-16
FIGURE 6. Adjusting V
CSR
by applying V
EXT
to I
SET
pin
www.national.com
12
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| LM3622M-4.1 | Lithium-Ion Battery Charger Controller |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM3621EVAL | 功能描述:EVALUATION BOARD FOR LM3621 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 過時/停產(chǎn)零件編號 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 傳感器類型:CMOS 成像，彩色（RGB） 傳感范圍:WVGA 接口:I²C 靈敏度:60 fps 電源電壓:5.7 V ~ 6.3 V 嵌入式:否 已供物品:成像器板 已用 IC / 零件:KAC-00401 相關(guān)產(chǎn)品:4H2099-ND - SENSOR IMAGE WVGA COLOR 48-PQFP4H2094-ND - SENSOR IMAGE WVGA MONO 48-PQFP |
| LM3621M | 制造商:Texas Instruments 功能描述: |
| LM3621M/NOPB | 功能描述:IC CTRLR LI-ION BAT CHRG 16-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 功能:充電管理 電池化學(xué):鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:3.75 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應(yīng)商設(shè)備封裝:SOT-23-5 包裝:剪切帶 (CT) 產(chǎn)品目錄頁面:669 (CN2011-ZH PDF) 其它名稱:MCP73831T-2ACI/OTCT |
| LM3621M-3.0 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Single Cell Lithium-Ion Battery Charger Controller |
| LM3621MX | 功能描述:IC CTRLR LI-ION BAT CHRG 16-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 功能:充電管理 電池化學(xué):鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:3.75 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應(yīng)商設(shè)備封裝:SOT-23-5 包裝:剪切帶 (CT) 產(chǎn)品目錄頁面:669 (CN2011-ZH PDF) 其它名稱:MCP73831T-2ACI/OTCT |
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