ETA4259
1.2A/40V Fully Integrated Linear Charger for 1 Cell Li-ion Battery
DESCRIPTION
FEATURES
ETA4259 is a single cell, fully integrated constant current
(CC)/constant voltage (CV) Li-ion battery charger. Its compact
package with minimum external components requirement makes
the ETA4259 ideal for portable applications. No external sense
resistor or blocking diode is necessary for the ETA4259. Build-in
thermal feedback mechanism regulates the charge current to
control the die temperature during high power operation or at
elevated ambient temperature. The ETA4259 has a pre-charge
function for trickle charging deeply discharged batteries. The fast
charge current can be programmed by an external resistor. CV
regulation mode is automatically enabled once the battery’s
charging curve reaches the constant voltage portion. The output
current then decays and is finally terminated once the charge
current drops to 1/5 of the programmed value. The ETA4259
keeps monitoring the battery voltage and enables a new charge
cycle once the voltage drops by 200mV below the CV value.
40V input standoff voltage
4.2V charge termination voltage
2.6V trickle charge threshold
Charge current programmable, up to 1.2A
400nA BAT current when no charging
Soft-start limits in-rush current
Fault and Charge Status Indicator
DFN3x3-10
APPLICATIONS
E-cigarette
Toys
Bluetooth applications
Li-ion battery powered devices
ETA4259 is in an DFN3x3-10 package.
TYPICAL APPLICATION
1
10
IN
IN
BATT
ISET
IBF
BAT
CBAT
2
8
7
6
STDBY
CIN
RNTC1
ETA4259
3
9
STAT
NTC
RISET
RIBF
nEN
nEN
RNTC2
4
TMR
GND
5
CTMR
PART No.
PACKAGE
TOP MARK
ETA4259
YWW2L
Pcs/Reel
ORDERING INFORMATION
ETA4259D3K
DFN3x3-10
5000
www.etasolution.com
1
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