LP28601-02

Mar.-2017

www.lowpowersemi.com

Page 1 of 12

Preliminary Datasheet

LP28601

3.5A Synchronous Buck Li-ion Charger

With Intelligent Path Management，Adapter Adaptive and OTG

General Description

The LP28601 is a 3.5A Li-Ion battery charger intended

for 4.4V~14V wall adapters. It utilizes a high efficiency

synchronous buck converter topology to reduce power

dissipation during charging. And a synchronous step

up function could supply 5V/2A from Li-Ion battery

which can be used as the OTG. The LP28601 includes

complete charge termination circuitry, automatic

recharge and a ±1% 4.2V/4.3V /4.35V float voltage.

The LP28601 could manage the power supply for

system intelligently. The adapter would satisfy the

system`s demand firstly, then charge battery with extra

current output capacity from adapter. If the current

capacity of adapter could not meet the system demand,

the adapter and battery would supply power for system

together. When the adapter`s current capacity is low

than the set charge current, the LP28601 would

decrease the charge current automatically to keep the

output of adapter would not be pull down by the chip.

Additional features include shorted cell detection;

temperature qualified charging and overvoltage

protection. The LP28601 is available in a low profile

QFN-28 package.

Order Information

LP28601 □ □ □

F: Pb-Free

Package Type

QV: QFN-28

Applications



Quick charge 2.0/3.0 (QC2.0 / QC3.0)



Portable Media Players



Cellular and Smart mobile phone



PDA/DSC



Handheld Battery-Powered Devices



Handheld Computers



Charging Docks and Cradles

Features



Power Path Management Intelligently



Adapter Adaptive



CHARGE:



Very Low Power Dissipation



3.5A Maximum Charge Current



Efficiency up to 90%



Input voltage: 4.4V~14V



Programmable charge complete voltage:

4.2V /4.3V /4.35V



Operation with Thermal Regulation to

Maximize Charge Rate Without Risk of

Overheating



Charges Single Cell Li-Ion Batteries Directly

from USB Port



OTG:





Efficiency up to 92%



Available in QFN28(4*4mm) Package



RoHS Compliant and 100% Lead (Pb)-Free

Functional Pin Description

27

25

24

23

1

2

3

4

5

16

15

6

22

17

28

21

20

19

18

7

VDDA

VBAT

OTG

IREF

BOOST

SYSSEL

VB

GNDP

LDR

VDDP

BST

LX

HDR

STAT

8

10

9

11

12

13

14

26

29

GNDA

Marking Information

Device

Marking

Package

Shipping

LP28601QVF

LPS

LP28601

YWX

QFN-28

3K/REEL

Y: Year code. W: Week code. X: Batch numbers.