Date: 18/11/2010

USB-compliant, Li-Ion switching chargers from Fairchild with USB On-The-Go

Fairchild Semiconductor has released the FAN5400 family of USB-compliant, Li-Ion switching chargers with USB On-The-Go (USB-OTG) capabilities.

The FAN5400 family with charge current capability up to 1.25A is suggested for single-cell or parallel-cell Li-Ion battery charging in devices such as cell phones, smartphones, tablets, wireless broadband hotspots, digital cameras and portable media/game players. The FAN5400's switch-mode charger provides up to 94 percent efficiency, which helps with faster charging and lower thermal dissipation.

Integrated with the switch-mode charger is a 5V 300mA boost regulator that uses the same inductor as the charger thereby reducing external component count. In addition, both the charger and boost circuit switch at 3MHz minimizing the size and cost of external passive components. Available in a 1.96 x 1.87mm, 20-bump, 0.4mm pitch CSP package. Fairchilds claims FAN5400 family is the smallest solution on the market that provides both charger and USB-OTG boost functionality.

Charging parameters and operating modes can be programmable through an I2C interface, which operates up to 3.4Mbps. This charger IC charges the battery at high charge voltage accuracy (±0.5 percent @25ºC) allows for more “topping out” of the battery, resulting in longer battery life.

In addition to the standard thermal and short circuit protections, the FAN5400 family can sustain up to 20V DC on the input in order to protect against unregulated over voltage conditions on the USB port.

Price: Each US$1.18 for 1K pieces

Availability: Sampling now

Delivery: 12 weeks ARO