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 TitleDocument ID/SizeRevisionRevision Date
ON Semiconductor Integrated Development Environment (IDE)WDK1.0GEVK_Software (351925kB)0
Package Drawings (1)
Document TitleDocument ID/SizeRevision
25 PIN FLIP-CHIP,2.55X2.2499BN (56.9kB)A
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
9 V / 2.5 A, 12 V / 2 A, Fully Integrated Li-Ion Switching Battery ChargerNCP1855/D (338kB)0Jan, 2016
Evaluation Board Documents (5)
Document TitleDocument ID/SizeRevisionRevision Date
WDK1.0GEVK Docking Station Bill of Materials ROHS CompliantWDK1.0GEVK_Docking_Station_BOM_ROHS.rev0 (49kB)0
WDK1.0GEVK Docking Station SchematicWDK1.0GEVK_Docking_Station_Schematic.rev0 (231kB)0
WDK1.0GEVK Wearable Development Kit SchematicWDK1.0GEVK_Wearable_Development_Kit_Schematic.rev0 (614kB)0
WDK1.0GEVK Wearable Development Kit User's manualWDK1.0GEVK_Users_Manual.pdf (5241kB)2
WDK1.0GEVK Wearable Reference Design Bill of Materials ROHS CompliantWDK1.0GEVK_Wearable_Reference_Design_BOM_ROHS.rev0 (53kB)0
Evaluation/Development Tool Information
ProductStatusComplianceShort Description
WDK1.0GEVKActiveWearable Reference Design and Development Kit
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
NCP1855FCCT1GActivePb-free Halide freeFlip-Chip-25499BN1Tape and Reel3000$0.7333
Specifications
ProductTypeNumber of Cells ChargedVCC Min (V)VCC Max (V)ID Max (µA)
NCP1855FCCT1GLi-Ion/Polymer14285
9 V / 2.5 A, 12 V / 2 A, Fully Integrated Li-Ion Switching Battery Charger (338kB) NCP1855
WDK1 WDK1.0GEVK
WDK1 WDK1.0GEVK
WDK1 WDK1.0GEVK
WDK1 WDK1.0GEVK
WDK1 WDK1.0GEVK
WDK1 WDK1.0GEVK
25 PIN FLIP-CHIP,2.55X2.2 NCP1855