LP3947ISD-51 National Semiconductor, LP3947ISD-51 Datasheet - Page 2

• Manufacturer Part Number: LP3947ISD-51
• Description: CHARGER, USB, I2C, POWERWISE, LLP-14
• Manufacturer: National Semiconductor

Specifications of LP3947ISD-51

• Battery Type: Li-Ion
• Input Voltage: 6V
• Battery Charge Voltage: 4.2V
• Charge Current Max: 750mA
• Battery Ic Case Style: LLP
• No. Of Pins: 14
• No. Of Series Cells: 1
• Operating Temperature Range: -40°C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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Connection Diagrams and Package Mark Information
Pin Descriptions
Ordering Information
Pin #
10
11
12
13
14
1
2
3
4
5
6
7
8
9
EN
SCL
SDA
BATT
V
VB
MODE
Diff-Amp
Ts
EOC
GND
CHG
ISEL
CHG-IN
T
*Other default options are available. Please contact National Semiconductor sales office/distributors for availability and specifications.
Name
SENSE
LP3947ISD-09
LP3947ISD-51
Supplied as 1000 Units,
Tape and Reel
LP3947
Charger Enable Input. Internally pulled high to CHG-IN pin. A HIGH enables the charger and a
LOW disables the charger.
I
I
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
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
2
C serial Interface Clock input.
C serial Interface Data input/out.
LP3947ISDX-09
LP3947ISDX-51
Supplied as 4500 Units
See NS Package Number SDA14B
T
, or removing the thermistor by physically disconnecting the battery, sets the
Tape and Reel
LP3947
(Top View)
2
Description
I
V
EOC = 0.1C
I
V
EOC = 0.1C
CHG
CHG
BATT
BATT
Options*
= 500 mA
= 500 mA
Default
= 4.1V
= 4.2V
20111002
L00061B
L00062B
Package
Marking