ETA4255
1.2A/40V Fully Integrated Linear Charger for 1 Cell Li-ion Battery
DESCRIPTION
FEATURES
ETA4255 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 ETA4255 ideal for portable applications. No external sense
resistor or blocking diode is necessary for the ETA4255. Build-in
thermal feedback mechanism regulates the charge current to
control the die temperature during high power operation or at
elevated ambient temperature. The ETA4255 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 ETA4255
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
Input over voltage protection
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
ESOP8
APPLICATIONS
E-cigarette
Toys
Bluetooth applications
Li-ion battery powered devices
ETA4255 is in an ESOP8 package.
TYPICAL APPLICATION
BAT
5
2
IN
4
7
IN
BAT
CBAT
STAT
ISET
nEN
CIN
RNTC1
ETA4255
6
1
STDBY
NTC
RISET
nEN
8
GND
3
RNTC2
PART No.
PACKAGE
TOP MARK
ETA4255
YWW2L
Pcs/Reel
ORDERING INFORMATION
ETA4255E8A
ESOP8
4000
www.etasolution.com
1
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