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| LP28012 Datasheet, PDF (1/10 Pages) Lowpower Semiconductor inc – Programmable Charge Current Up to 1200mA | |||
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Preliminary Datasheet
LP28012
1.2A Single-chip Li-ion and Li-POL Charge
General Description
The LP28012 is a complete constant-current/ constant
voltage linear charger for single cell lithium-ion
batteries. Its ESOP8 package and low external
component count make the LP28012 ideally suited for
portable applications. No external sense resistor is
needed, and no blocking diode is required due to the
internal MOSFET architecture. Thermal feedback
regulates the charge current to limit the die
temperature during high power operation or high
ambient temperature. The charge voltage is fixed at
4.2V, and the charge current can be ISET rammed
externally with a single resistor. The LP28012
automatically terminates the charge cycle when the
charge current drops to 1/10th the ISET rammed value
after the final float voltage is reached.
When the input supply is removed, the LP28012
automatically enters a low current state, dropping the
battery drain current to less than 4µA.
Other features include charge current monitor, under
voltage lockout, automatic recharge and a status pin to
indicate charge termination and the presence of an
input voltage.
Order Information
LP28012
â¡â¡ â¡
F: Pb-Free
Package Type
QV: TDFN-10
Applications
ï² Portable Media Players/Game
ï² Power Bank
ï² PDA/MID
ï² Bluetooth Applications
Features
ïµ Very Low Power Dissipation
ïµ Short-circuit protection
ïµ Programmable Charge Current Up to 1200mA
ïµ No MOSFET, Sense Resistor or Blocking Diode
Required
ïµ Constant-Current/Constant-Voltage Operation
with Thermal Regulation to Maximize Charge Rate
Without Risk of Overheating
ïµ 8µA Supply Current in Shutdown
ïµ Drainage Charge Current Thermal Regulation
Status Outputs for LED or System Interface
ïµ Indicates Charge and Fault Conditions
ïµ Consumption Available in TDFN-10 Package
ïµ RoHS Compliant and 100% Lead (Pb)-Free
Typical Application Circuit
VIN
10uF
LP28012
1
VIN
8 EN
3
STAT2
2 STAT1
5 GND
10
BATT
6
ISET
ICHARG=1000/Rset
1uF
BATTERY
Rset
2K
Marking Information
Device
LP28012
Marking
LPS
LP28012
XXXX
Package Shipping
QV:TDFN-10 3K/REEL
LP28012 â 00 Feb.-2014 Email: marketing@lowpowersemi.com
www.lowpowersemi.com
Page 1 of 10
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