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參數(shù)資料
| 型號： | LM3621M-3.0X |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | BATTERY CHARGE CONTROLLER, PDSO16 |
| 封裝： | SOIC-16 |
| 文件頁數(shù)： | 5/15頁 |
| 文件大小： | 377K |
| 代理商： | LM3621M-3.0X |
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
exceeds the over voltage detection threshold (V
BAT-Det) or
whenever V
CSR 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
DD pin will collapse to the same potential
as the V
SS pin. An internal switch will disconnect the circuitry
of the LM3621 from the V
BAT+ pin so that no more than 1A
(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
CSR. Applying an external voltage
source (V
EXT) to the ISET pin will adjust the value of VCSR 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
adjusted accordingly. The voltage at I
SET pin should be
within the range of 1V
≥ V
ISET
≥ 0.1V. The transfer functions
of V
CSR to VISET are:
Fast Charge Mode, V
CSR = 0.933VISET
Hi-Z Mode, V
CSR = 0.083VISET
Boost Mode, V
CSR = 0.48VISET+0.65
Over Current Threshold, V
CSR = 0.36VISET+0.79
End-Of-Charge, V
CSR = 0.07VISET
10010705
FIGURE 5. Battery Refresh
10010716
FIGURE 6. Adjusting V
CSR by applying VEXT to ISET pin
LM3621
www.national.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| LM3621MX/NOPB | 制造商:Texas Instruments 功能描述:Charge Controller Li-Ion 20mA 4.1V/4.2V 16-Pin SOIC N T/R |
| LM3622 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Lithium-Ion Battery Charger Controller |
| LM3622AM-4.1 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Lithium-Ion Battery Charger Controller |
| LM3622AM-4.1/NOPB | 功能描述:IC CTRLR LI-ION BAT CHRG 8-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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