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參數(shù)資料
| 型號： | LP3945 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Battery Charge Management System |
| 中文描述： | 電池充電管理系統(tǒng) |
| 文件頁數(shù)： | 2/15頁 |
| 文件大?。?/td> | 337K |
| 代理商： | LP3945 |
LP3945/LP3946 LLP14 Package Drawing
20066503
(TOP VIEW)
See NS Package Number LDA14A
LP3945/LP3946 Pin Description
Pin #
1
2
3
4
5
6
7
8
LP3945
LP3946
Description
EN
SCL
SDA
BATT
V
BG
VB
SENSE
GND
Diff-Amp
EN
GND
GND
BATT
V
BG
VB
SENSE
GND
Diff-Amp
Charger Enable Input. Internally pulled high to CHG-IN pin.
Serial Interface Clock Input for LP3945. Ground in LP3946.
Serial Interface DATA Input/Output for LP3945. Ground in LP3946.
Battery supply input terminal. Must have 10 μF ceramic capacitor to GND.
Bandgap Voltage Reference (1.225V). Factory test point. Must be left floating.
Battery Voltage Sense connected to the + terminal of the battery.
Digital Ground
Charge current monitoring differential amplifier output. Voltage output representation
of the charge current.
Battery in Place Bar. Input signal to indicate presence/absence of the battery.
Internally pulled high to CHG-IN. Pulled low by the Battery ID resistor. Absence of
the ID resistor (BIPB signal high) indicates no battery. Pulling BIPB pin high sets the
device to LDO mode.
Active Low Open Drain Output to drive Green LED. Active when wall adaptor is
connected and battery is fully charged. Regardless of the battery chemistry, this
signal is available whenever a battery is attached.
Analog Ground
Active Low Open Drain Output to drive Red LED. Active when wall adaptor is
connected and battery is being charged. Regardless of the battery chemistry, this
signal is available whenever a battery is attached.
For normal operation, this pin must be left floating. Pulling this pin to ground will
bypass the 5.6 Hrs safety timer in constant current mode. See "StopModeEN PIN"
Section for more detail.
WARNING! Disabling the timer is not a recommended operating condition
since it disables the safety timer function. User must provide protection
against continuously charging a defective battery.
Charger input from a regulated, current limited power source. Must have a 1 μF
ceramic capacitor to GND.
9
BIPB
BIPB
10
EOC
EOC
11
12
GND
CHG
GND
CHG
13
StopModeEN
StopModeEN
14
CHG-IN
CHG-IN
Ordering Information
LP3945 supplied as 1000 units Tape and Reel
LP3945ILD
LP3945 supplied as 4500 units Tape and Reel
LP3945ILDX
Package Marking
L00011B
LP3946 supplied as 1000 units Tape and Reel
LP3946ILD
LP3946 supplied as 4500 units Tape and Reel
LP3946ILDX
Package Marking
L00030B
The LP3946 has default values of I
CHG
=500mA, V
BATT
=4.1V and EOC=0.1C. For other default options, please contact National
Semiconductor Sales Office.
L
www.national.com
2
相關PDF資料 |
PDF描述 |
|---|---|
| LP3945ILD | Battery Charge Management System |
| LP3945ILDX | Battery Charge Management System |
| LP3961ES-1.8 | 800mA Fast Ultra Low Dropout Linear Regulators |
| LP3961ES-2.5 | 800mA Fast Ultra Low Dropout Linear Regulators |
| LP3961ES-3.3 | 800mA Fast Ultra Low Dropout Linear Regulators |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LP3945ILD | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Battery Charge Management System |
| LP3945ILDX | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Battery Charge Management System |
| LP3945LD | 功能描述:IC MANAGEMENT BATT CHARGE 14-LLP RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標準包裝:1 系列:- 功能:充電管理 電池化學: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 供應商設備封裝:SOT-23-5 包裝:剪切帶 (CT) 產品目錄頁面:669 (CN2011-ZH PDF) 其它名稱:MCP73831T-2ACI/OTCT |
| LP3946 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Battery Charge Management System |
| LP3946ILDX | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Battery Charge Management System |
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