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LP3947 датащи(PDF) 8 Page - Texas Instruments

номер детали LP3947
подробное описание детали  LP3947 USB/AC Adaptor, Single Cell Li-Ion Battery Charger IC
PDF  17 Pages
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производитель  TI2 [Texas Instruments]
домашняя страница  https://www.ti.com
Logo TI2 - Texas Instruments

LP3947 датащи(HTML) 8 Page - Texas Instruments

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background image
Timer time out
Charger = Off
Timer resets
RLED = ON
GLED = ON
Disconnect
power at
CHG-IN pin to
restart charger
Maintenance Mode
Charger = Off
RLED = Off
GLED = On
1.39V<Ts<2.42V
?
Battery Temp
violation
Charger = Off
Timer resets
RLED = ON
GLED = ON
Set Fast Charge Current = I
Start 5.6 hr Timer
Timer =
5.6 hr?
EN pin =
low?
Y
N
1.39V<Ts<2.42V
?
N
Y
Y
N
Y
N
N
Y
VBATT > = 4.1V*?
1.39V<Ts<2.42V
?
N
Y
1.39V<Ts<2.42V
?
N
Y
Constant Voltage Mode
VBATT = 4.1V *
Pre-Qualification
Charge Current = 50 mA
RLED = On
GLED = Off
1.39V<Ts<2.42V
?
N
Y
LDO Mode
ICHG = 1.2A
VBATT = 4.1V*
LED's Off
4.3V < VCHG-IN < 6.0V
and
VBATT < VCHG-IN
1.39V < Ts < 2.42V
4.3V < VCHG-IN < 6V
Ts t 2.7V
VBATT > VCHG-IN
LED's Off
Charger Off
1.39V<Ts<2.42V
?
N
Y
Timer =
5.6 hr?
EN pin =
low?
Y
N
or
VBATT > 3.0V?
N
IEOC < (0.1 x ICHG)*?
N
* Default Value. See "I
2
C Interface" section.
Y
VBATT > 3.0V?
N
Y
VBATT < 3.9V
EN pin =
High?
Y
and
N
Y
LP3947
SNVS298B – NOVEMBER 2004 – REVISED APRIL 2013
www.ti.com
Figure 4. LP3947 Charger Flow Chart
8
Submit Documentation Feedback
Copyright © 2004–2013, Texas Instruments Incorporated
Product Folder Links: LP3947



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