LP28501
LP28501 is 3.5A Synchronous Buck Li-ion Charger manufactured by Lowpowersemi.
Description
The LP28501 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. The LP28501 includes plete charge termination circuitry, automatic recharge and a ±1% 4.2V/4.3V /4.35V float voltage.
The LP28501 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 LP28501 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 LP28501 is available in a low profile QFN-28 package.
Order Information
- -
- 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 puters
- 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 plete 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
- Available in QFN28(4- 4mm) Package
- Ro HS pliant and 100% Lead (Pb)-Free
Functional Pin Description
VDC VDC VBUS VBUS VSYS VSYS VBAT
VDDP 1 BST 2 LX 3 HDR 4
GNDP 5 LDR 6
STAT 7
27 26...
