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參數(shù)資料
| 型號： | LP3947 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | USB/AC Adaptor, Single Cell Li-Ion Battery Charger IC |
| 中文描述： | 的USB / AC適配器，單節(jié)鋰離子電池充電器IC |
| 文件頁數(shù)： | 2/14頁 |
| 文件大小： | 649K |
| 代理商： | LP3947 |
Connection Diagrams and Package Mark Information
20111002
(Top View)
See NS Package Number SDA14B
Pin Description
Pin #
1
Name
EN
Description
Charger Enable Input. Internally pulled high to CHG-IN pin. A HIGH enables the charger and a
LOW disables the charger.
I
2
C serial Interface Clock input.
I
2
C serial Interface Data input/out.
Battery supply input terminal. Must have 10 μF ceramic capacitor to GND
Regulated 2.78V output used for biasing the battery temperature monitoring thermistor.
Battery Voltage Sense connected to the positive terminal of the battery.
Select pin between AC adaptor and USB port. A LOW sets the LP3947 in USB port and a HIGH
sets it in the AC adaptor.
Charge current monitoring differential amplifier output. Voltage output representation of the charge
current.
Multi function pin. Battery temperature monitoring input and LDO/Charger mode.
Pulling this pin to V
T
, or removing the thermistor by physically disconnecting the battery, sets the
device in LDO mode.
Active Low Open Drain Output. Active when USB port or AC adaptor is connected and battery is
fully charged. For more information, refer to “LED Charge Status Indicators” section.
Ground
Active Low Open Drain Output. Active when USB port or AC adaptor is connected and battery is
being charged. For more information, refer to “LED Charge Status Indicators” section.
Control pin to switch between low power (100 mA) mode and high power (500 mA) mode in USB
mode. This pin is pulled high internally as default to set the USB in 100 mA mode. This pin has to
be externally pulled low to go into 500 mA mode.
Charger input from a regulated, current limited power source. Must have a 1 μF ceramic capacitor
to GND
2
3
4
5
6
7
SCL
SDA
BATT
V
T
VB
SENSE
MODE
8
Diff-Amp
9
Ts
10
EOC
11
12
GND
CHG
13
ISEL
14
CHG-IN
Ordering Information
LP3947
Supplied as 1000 Units,
Tape and Reel
LP3947ISD-09
LP3947
Supplied as 4500 Units
Tape and Reel
LP3947ISDX-09
Default
Options*
Package
Marking
I
CHG
= 500 mA
V
BATT
= 4.1V
EOC = 0.1C
I
CHG
= 500 mA
V
BATT
= 4.2V
EOC = 0.1C
L00055B
LP3947ISD-51
LP3947ISDX-51
L00056B
*Other default options are available. Please contact National Semiconductor sales office/distributors for availability and specifications.
L
www.national.com
2
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LP3947ISD-09 | 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 |
| LP3947ISD-09/NOPB | 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 |
| LP3947ISD-51 | 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 |
| LP3947ISD-51/NOPB | 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 |
| LP3947ISD-51EV | 功能描述:電源管理IC開發(fā)工具 LP3947 EVAL BOARD RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
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