LP28400 Datasheet, PDF (1/17 Pages) Lowpower Semiconductor inc – Programmable Charge Current Up to 3000mA

Preliminary Datasheet
LP28400
3A/15V Synchronous Switching Mode 1/2cell Li-ion
Chargers With Power Path Selector
General Description
The LP28400 is a complete constant-current/
constant- voltage Switch mode charger for 1cell or
2cell lithium-ion batteries. 1.5MHz Synchronous
Switching Charger with 3A Integrated MOSFETs. No
external blocking diodes is required. The Switch
mode charger uses a high switching frequency to
reduce power dissipation during charging eliminate
heat and allow tiny external components. It can
operate from a single input that accepts. All power
switches for charging and switching the load
between battery and external power are included
on-chip that can be embedded in a wide range of
handheld applications, Built-in power path controller,
easily installation with external MOSFETs, Dynamic
power management, better thermal performance.
The LP28400 includes complete charge termination
circuitry, automatic recharge and a ±1% output
voltage. Fault condition protection includes cycle -by
-cycle current limiting and thermal shutdown. Other
safety features include battery temperature
monitoring, charge status indication and
programmable timer to cease the charging cycle.
The LP28400 is available in a low profile (0.75mm)
10-lead (4mm × 4mm) TDFN package.
Order Information
LP28400 □ □ □ □ □
F: Pb-Free
Package Type
QV: TQFN-20
Output voltage
Default: 4.2V/8.4V
Features
 Up to 95% efficiency
 4.5-15V Operating voltage(Vin)
 Vin Over Voltage Protection:6.8V/16.5V
 Short-circuit protection
 Programmable Charge Current Up to 3000mA
 Constant-Current/Constant-Voltage Operation
with Thermal Regulation to Maximize Charge
Rate Without Risk of Overheating
 Charges 1Cell and 2cell Li-Ion Batteries Directly
with same chip, Chargers with power path
selector
 Internal Fixed 7Hrs timer
 Drainage Charge Current Thermal Regulation
Status Outputs for LED or System Interface
 Indicates Charge and Fault Conditions
 Optional Battery Temperature Monitoring Before
and During Charge Automatic Sleep Mode for
Low-Power
 Consumption Available in 4mm × 4mm TQFN-20
Package
 RoHS Compliant and 100% Lead (Pb)-Free
Marking Information
Device Marking
LP28400 LPS
LP28400
XXXXX
X: Batch numbers.
Package
QV: TQFN-20
Shipping
Applications
 Portable Media Players
 Cellular and Smart mobile phone
 Car GPS
 Handheld Battery-Powered Devices
 Handheld Computers
 Charging Docks and Cradles
LP28400-00 Version 1.0 May.-2013 Email: [e-mail] www.lowpowersemi.com Page 1 of 17