NCP1854 Series

Battery Charger, Switching, 2.5 A, with External Power Path Control and USB-OTG Boost Regulator

Catalog

Battery Charger, Switching, 2.5 A, with External Power Path Control and USB-OTG Boost Regulator

Part	Operating Temperature [Max]	Operating Temperature [Min]	Mounting Type	Battery Chemistry	Package / Case	Current - Charging	Supplier Device Package [x]	Supplier Device Package [y]	Supplier Device Package	Interface	Battery Pack Voltage	Charge Current - Max [Max]	Voltage - Supply (Max)	Number of Cells
ON Semiconductor NCP1854FCCT1G	85 °C	-40 °C	Surface Mount	Lithium Ion	25-UFBGA FCBGA	Constant - Programmable	2.55	2.2	25-FlipChip	I2C USB	4.5 V	2.5 A	7.3 V	1

Catalog

Battery Charger, Switching, 2.5 A, with External Power Path Control and USB-OTG Boost Regulator

Key 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

Description

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.