Version: 10/10/23
www.lowpowersemi.com
High-
Efficiency 2A Sensorless Switching Charger
Features
Easy-to-use standalone high-
efficiency
switching charger
- Proprietary sensorless
charge current control
-
4.1V to 6.2V input voltage with 28V absolute
maximum input voltage rating
-
Resistor programmable charge voltages
4.1V/4.2V/4.25V/4.35V
- 2.0
A maximum fast charge current
- 1.2MHz switching frequency
- 95
% high efficiency @ VBAT=3.8V, ICHG=
- 93
% high efficiency @ VBAT=3.8V, ICHG=2A
- Input voltage regulation
to allow weak input
power source to charge battery
(VINDPM)
- Support trickle charge, prechar
ge,
Current (CC) charge and C
onstant
charge, charge termination and recharge
High charge accuracy
- +/-
0.5% charge voltage regulation
- +/- 6
% charge current regulation
High integration
- Integrated all MOSFETs
- Internal loop compensation
- Internal bootstrap diode
- LED charge indication driver
Protections
- Cycle-by-
cycle current limit protection
- Input under-
voltage lockout (UVLO)
- Input over-
voltage protection (OVP)
-
Cold/hot battery temperature monitoring
-
Junction temperature thermal regul
- ISET pin short and open protect
i
- Charge safety timer
Packaging
- DFN3x3-10
- RoHS compliant and halogen free
- 100% lead (Pb) free
Applications
Portable battery powered devices
Gaming devices
Charging docks and cradles
E-Cigarette
www.lowpowersemi.com
email:
marketing@lowpowersemi.com
Efficiency 2A Sensorless Switching Charger
efficiency
1-cell
charge current control
4.1V to 6.2V input voltage with 28V absolute
Resistor programmable charge voltages
A maximum fast charge current
% high efficiency @ VBAT=3.8V, ICHG=
1A
% high efficiency @ VBAT=3.8V, ICHG=2A
to allow weak input
(VINDPM)
ge,
Constant
onstant
Voltage (CV)
charge, charge termination and recharge
0.5% charge voltage regulation
% charge current regulation
cycle current limit protection
voltage lockout (UVLO)
voltage protection (OVP)
Cold/hot battery temperature monitoring
Junction temperature thermal regul
ation
i
on
General Description
The LP4032 is a standalone 1
battery charger providing up to
to the battery from
4.1V to 6.2V input voltage. The
charge current is programmable by a resis
connected from ISET to GND and the charge
voltage is programmable
by a resistor
from VSET to GND.
The charge can be enabled
and disabled from
ISET pin.
at 1.2MHz switching frequency allowing
small-size 1uH inductor
for 2A
patent-protected integrated
control technique
eliminates external sensing
resistor and allows very
high charge efficiency
BOM cost and very
small footprint
features high accuracy of
and end-of-charge
termination
competitive with the
external
current sensing and con
t
LP4032 is available in D
FN3x3
Order Information
LP4032
F: Pb-
Free
Package Type
QV: DFN -1
Application Circuit
VBUS
PMID
1μF
4.1V – 6.2V
C1
SW
TS
BAT
REGN
STAT
VSET
GND
BST
2.2μF
C2
REGN
VIN
ISET
1kΩ
LP4032
20kΩ
marketing@lowpowersemi.com
1 / 20
LP4032
Efficiency 2A Sensorless Switching Charger
General Description
The LP4032 is a standalone 1
-cell switching
battery charger providing up to
2A charge current
4.1V to 6.2V input voltage. The
charge current is programmable by a resis
tor
connected from ISET to GND and the charge
by a resistor
connected
The charge can be enabled
ISET pin.
The LP4032 operates
at 1.2MHz switching frequency allowing
a
for 2A
fast charging. The
current sensing and
eliminates external sensing
high charge efficiency
, low
small footprint
. The LP4032
precharge, fastcharge
termination
current, which is
external
-resistor-based
t
rol architecture. The
FN3x3
-10 package.
Free
Package Type
0
ENP
10μF
C3
SCL
1μH
47nF
C4
+
REGN
10μF
C5
RT1
RT2
