LP28009 Datasheet, PDF (1/12 Pages) Lowpower Semiconductor inc – Internal Integrate P-MOSFETs

Preliminary Datasheet
LP28009
Single and Dual Cell Li+ Battery Charger IC –LP28009
General Description
The LP28009 is a fully integrated low cost single-cell
and dual cell Li-Ion battery charger IC ideal for
portable applications. The LP28009 is capable of
being powered up from AC adapter. The LP28009
enters sleep mode when AC adapter is removed. The
LP28009 optimizes the charging task by using a
control algorithm including preconditioning mode, fast
charge mode and constant voltage mode. The
charging task is terminated as the charge current
drops below the preset threshold. The AC adapter
charge current can be programmed up to 1.2A with
an external resister. The internal thermal feedback
circuitry regulates the die temperature to optimize the
charge rate for all ambient temperatures. The
LP28009 features 18V maximum rating voltages for
AC adapter. The other features are under voltage
protection, over voltage protection for AC adapter
supply and battery temperature monitoring.
Order Information
LP28009 □ □ □ □ □
F: Pb-Free
Package Type
SP: SOP-8(EP)
Output Voltage
42: 4.2V
84: 8.4V
Applications
 Portable Media Players/MP3 players
 Cellular and Smart mobile phone
 PDA/DSC
 Bluetooth Applications
Features
 18V Maximum Rating for AC Adapter
 Internal Integrate P-MOSFETs
 AC Adapter Power Good Status Indicator
 Charge Status Indicator
 Under Voltage Protection
 Over Voltage Protection
 Automatic Recharge Feature
 Battery Temperature Monitoring
 Small 8-Lead SOP(EP) Package
 Thermal Feedback Optimizing Charge Rate
 ROHS Compliant and 100% Lead (Pb)-Free
Marking Information
Device Marking Package Shipping
LP28009
SP:SOP-8 3K/REEL
Typical Application Circuit
VIN
RED
10uF
1 _ACIN
BATT ⁸
2
CHRG_S
7
NC
3 _PGOOD
4
GND
5
ISETA
9 _GND
EN ⁶
LP28009-42SPF
10uF
BATTERY
I/O CTRL
Q1
LPM9013
VIN
RED
10uF
1
ACIN
8
BATT
2 _{CHRG_S}
NC ⁷
3
PGOOD
4 _GND
ISETA ⁵
9 _GND
EN ⁶
LP28009-84SPF
10uF
BATT
I/O CTRL
Q8
LPM9013
LP28009 – 02
May.-2013
Email: [e-mail]
www.lowpowersemi.com
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