Version: 10/5/2022 www.lowpowersemi.com email: marketing@lowpowersemi.com 1 / 23
LP4081H
16V, I2C Controlled Linear Charger with Power Path
Features
âš« Input over-voltage protected up to 16V
âš« Charge Management
- Programmable charge current up to 1A
- Programmable floating voltage with 0.3%
accuracy
- Programmable trickle charge and termination
current
âš« Charge and discharge current monitor
âš« Automatic re-charge and thermal foldback
âš« I2C bus to SoC with an interrupt pin
âš« Low drop-out fast charge function
âš« Power Path Management
âš« Charge safety timer and watchdog
âš« NTC management
âš« Rich protections: UVLO, OVP, SCP
⚫ 0.6-µA ultra-low iq in standby mode
⚫ 0.4-µA ultra-low iq in ship mode
⚫ 3mm Χ 3mm DFN-10 package
âš« RoHS Compliant and 100% Lead (Pb) Free
âš«
Applications
âš« Wearable
âš« Fitness Application
âš« Smart Watch
General Description
The LP4081H is an ultra-low power linear charger targeting
at wearable applications protected up to 16V input voltage.
It contains a linear charger to charge the Li-ion battery. An
I2C interface is offered for programmability and flexibility of
the device. The charger has an ideal-diode mode for high
efficiency and low heat operation. The LP4081H integrates
the power path management function to support SoC
powerup even with a deeply-discharged battery. The
LP4081H features 150mΩ low R
ds,on
of the BAT_FET from
the battery to the system to achieve high discharge
efficiency and low heat.
The LP4081H provides rich protections, including the input
Under-volage lockout protection (UVLO), input over-
voltage protection (OVP) and system short circuit
protection (SCP).
The typical quiescent current of LP4081H is 0.6-µA and the
battery current is reduced to 0.4-uA in ship mode.
The whole system is in a 10-pin 3 X 3 DFN package.
Order Information
LP4081H
F: Green/Pb-Free
Package Type
QV : DFN
Typical Application Circuit
ß = 3435
R
NTC
LP4081H
BAT
BUS
SYS
SoC
SCL
IRQb
GPIO0
GPIO1
SDA
GPIO2
Q1 Q2
Q3
Battery
VIN
GND
10uF
C
3
10uF
C
4
VDD
NTC
1uF
C
1
1Ω
R
1
1uF
C
2
10kΩ
R
2
10
1
2
3
5
6
7
8
9
NC
4
