NCP1854 Datasheet, PDF (1/27 Pages) ON Semiconductor – Fully Integrated Li-Ion Switching Battery Charger

NCP1854
2.5 A Fully Integrated Li-Ion
Switching Battery Charger
with Power Path
Management and USB
On-The-Go Support
The NCP1854 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 supervision. An optional battery FET can be placed between
the system and the battery in order to isolate and supply the system.
The NCP1854 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 NCP1854 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
http://onsemi.com
MARKING
DIAGRAM
25 BUMP
FLIP−CHIP
CASE 499BN
1854
AYWW
G
1854 = 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 27 of this data sheet.
© Semiconductor Components Industries, LLC, 2014
1
September, 2014 − Rev. 4
Publication Order Number:
NCP1854/D