Qdatasheet_Logo
Integrated circuits, Transistor, Semiconductors Search and Datasheet PDF Download Site

LTC4052-42 View Datasheet(PDF) - Linear Integrated System

Part Name
Description
MFG CO.
'LTC4052-42' PDF : 8 Pages View PDF
1 2 3 4 5 6 7 8
LTC4052-4.2
BLOCK DIAGRA
45mV
VIN 3
+
BAT
GND 4
TIMER 5
OSCILLATOR
CHRG 6
40µA
ACPR
2
100ms SLEEP
IMAX
FILTER
CHARGE
PUMP
TRIPLER
TRICKLE FAST
CLK
VMIN
STOP
C/10
LOGIC
+
TIMERS
VRECHRG
VFLOAT
105m+V
VIN
24mA
10m
1 SENSE
7 GATE
8 BAT
THERMAL
SHUTDOWN
TEMP
REFERENCE
1.23V
VMAX
1.23V
U
OPERATIO
The LTC4052 is a complete lithium-ion battery pulse
charger with an internal 0.35N-MOSFET switch driven
by an internal charge pump. The charge current is set by
the current limit of the input supply (wall adapter). An
external RSENSE sets the maximum allowable charge
overcurrent and prevents a wall adapter with the wrong
current limit from damaging the battery. If the current limit
of the input supply is above IMAX, the charger will imme-
diately terminate charging and will retry after 640ms
(CTIMER = 0.1µF). If the battery is disconnected while in
4
4052 BD
fast charge mode, the charge pump will be turned off when
the voltage at the BAT pin rises above 4.7V and turned back
on when the voltage drops below the float voltage.
A charge cycle begins when the voltage at the VIN pin rises
above the BAT pin by 45mV. The charger will go into trickle
charge mode if the battery voltage is below 2.45V. The
trickle charge current is preset to 24mA and is provided by
an internal current source. In trickle mode, both the pass
transistor and charge pump are off.
405242i
Share Link: GO URL

All Rights Reserved © qdatasheet.com  [ Privacy Policy ] [ Contact Us ]