ON Semiconductor, a supplier of high performance silicon solutions, has introduced a fully programmable Lithium- Ion (Li-Ion) switching battery charger that has been optimised for power efficiency in smart phones, tablets and other handheld devices. The NCP1851 has been designed to significantly reduce charge times, increase battery life and includes advanced start-up features.
With 1.6 ampere (A) charging capability, the device is sized at 2.2 x 2.55 mm for the latest USB compliant input supplies and large battery capacities and can complete a full charge cycle of a 1650 milli ampere hour (mAh), 4.2 volt (V) Li-Ion battery in 90 minutes.
“Robustness, efficiency and fast charge time are now pre-requisites for designers of high performance, ultra-space constrained applications,” said Thibault Kassir, director of ON Semiconductor’s Interface & Power ICs Division. “The NCP1851 single chip solution allows simple integration into the latest USB charging designs.”
The NCP1851 provides dynamic power path management which enables instant system turn-on in case of a weak battery and helps replenish a deeply discharged battery. Both the device’s internal junction temperature sensor and external Negative Temperature Coefficient (NTC) thermistor ensure safe charging of the system by reporting dedicated interrupts to the i²C Control Bus. The NCP1851 provides a USB On-the-Go (OTG) mode that boosts battery voltage to power accessories plugged into the USB port, eliminating the need for another step-up converter.
The NCP1851 is housed in a 25 bump Flip-Chip CSP package case with overall dimensions of a mere 2.2 mm x 2.55 mm and height of 0.6 mm maximum.