NCP1855: Switching Battery Charger, up to 15.5V Operating Input Voltage

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 supervision. 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

Applications

Single Cell Li-Ion Battery Charger
High Efficiency Charging
High USB Input Voltage Charging (5V, 9V, 12V standards)

End Products

Smart Phone
Handled device
Tablet
PDA

Software (1)

Document Title	Document ID/Size	Revision	Revision Date
ON Semiconductor Integrated Development Environment (IDE)	WDK1.0GEVK_Software (351925kB)	0

Package Drawings (1)

Document Title	Document ID/Size	Revision
25 PIN FLIP-CHIP,2.55X2.2	499BN (56.9kB)	A

Data Sheets (1)

Document Title	Document ID/Size	Revision	Revision Date
9 V / 2.5 A, 12 V / 2 A, Fully Integrated Li-Ion Switching Battery Charger	NCP1855/D (338kB)	0	Jan, 2016

Evaluation Board Documents (5)

Document Title	Document ID/Size	Revision
WDK1.0GEVK Docking Station Bill of Materials ROHS Compliant	WDK1.0GEVK_Docking_Station_BOM_ROHS.rev0 (49kB)	0
WDK1.0GEVK Docking Station Schematic	WDK1.0GEVK_Docking_Station_Schematic.rev0 (231kB)	0
WDK1.0GEVK Wearable Development Kit Schematic	WDK1.0GEVK_Wearable_Development_Kit_Schematic.rev0 (614kB)	0
WDK1.0GEVK Wearable Development Kit User's manual	WDK1.0GEVK_Users_Manual.pdf (5241kB)	2
WDK1.0GEVK Wearable Reference Design Bill of Materials ROHS Compliant	WDK1.0GEVK_Wearable_Reference_Design_BOM_ROHS.rev0 (53kB)	0

Evaluation/Development Tool Information

Product	Status	Compliance	Short Description
WDK1.0GEVK	Active		Wearable Reference Design and Development Kit

Order Information

Product	Status	Compliance	Package		MSL*	Container		Budgetary Price/Unit
NCP1855FCCT1G	Active	Pb-free Halide free	Flip-Chip-25	499BN	1	Tape and Reel	3000	$0.7333

Specifications

Product	Type	Number of Cells Charged	VCC Min (V)	VCC Max (V)	ID Max (µA)
NCP1855FCCT1G	Li-Ion/Polymer	1	4	28	5

9 V / 2.5 A, 12 V / 2 A, Fully Integrated Li-Ion Switching Battery Charger (338kB) NCP1855

WDK1 WDK1.0GEVK

25 PIN FLIP-CHIP,2.55X2.2 NCP1855