NCP1855 Datasheet, PDF (1/26 Pages) ON Semiconductor – Fully Integrated Li-Ion Switching Battery Charger

NCP1855
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9 V / 2.5 A, 12 V / 2 A, Fully
Integrated Li-Ion Switching
Battery Charger with Power
Path Management and USB
On-The-Go Support
The NCP1855 is a fully programmable single cell Lithium-ion
switching battery charger optimized for charging from a USB
compliant input supply and AC adaptor power source. The device
integrates a synchronous PWM controller, power MOSFETs, and the
entire charge cycle monitoring including safety features under
software supervisibon. An optional battery FET can be placed
between the system and the battery in order to isolate and supply the
system. The NCP1855 junction temperature is monitored during
charge cycle and both current and voltage can be modified accordingly
through I²C setting. The charger activity and status are reported
through a dedicated pin to the system. The input pin is protected
against overvoltages.
The NCP1855 also provides USB OTG support by boosting the
battery voltage as well as providing overvoltage protected power
supply for USB transceiver.
Features
• 2.5 A Buck Converter with Integrated Pass Devices
• Input Current Limiting to Comply to USB Standard
• Automatic Charge Current for AC Adaptor Charging
• High Accuracy Voltage and Current Regulation
• Input Overvoltage Protection up to +28 V
• Factory Mode
• 1000 mA Boosted Supply for USB OTG Peripherals
• Reverse Leakage Protection Prevents Battery Discharge
• Protected USB Transceiver Supply Switch
• Dynamic Power Path with Optional Battery FET
• Silicon Temperature Supervision for Optimized Charge Cycle
• Safety Timers
• Flag Output for Charge Status and Interrupts
• I²C Control Bus up to 3.4 MHz
• Small Footprint 2.2 x 2.55 mm CSP Package
• These Devices are Pb−Free and are RoHS Compliant
Typical Applications
• Smart Phone
• Handheld Devices
• Tablets
• PDAs
This document contains information on a product under development. ON Semiconductor
reserves the right to change or discontinue this product without notice.
http://onsemi.com
MARKING
DIAGRAM
25 BUMP
FLIP−CHIP
CASE 499BN
1855
AYWW
G
1855 = Specific Device Code
A = Assembly Location
Y = Year
WW = Work Week
G = Pb−Free Package
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 25 of this data sheet.
© Semiconductor Components Industries, LLC, 2014
1
August, 2014 − Rev. P1
Publication Order Number:
NCP1855/D