Fairchild Semiconductor’s USB-Compliant, Li-Ion Battery Switching Charger Shortens Charge Time and Reduces Heat
November 15 2010 - 11:02AM
Business Wire
When charging a single-cell or parallel-cell Lithium Ion
(Li-Ion) battery through a USB port or AC/DC adaptor, designers
need a solution that provides faster charge times and overcomes the
thermal issues associated with the linear charger solutions in use
today. To meet this need, Fairchild Semiconductor (NYSE: FCS)
developed the FAN5400 family of USB-compliant, Li-Ion switching
chargers with USB On-The-Go (USB-OTG) capabilities.
Fairchild Semiconductor's USB-Compliant,
Li-Ion Battery Switching Charger Shortens Charge Time and Reduces
Heat (Photo: Business Wire)
The FAN5400 family is ideal 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. As charge currents and battery
sizes continue to increase, charging through the USB port or 5V
AC/DC adaptor with a linear charger becomes increasingly
inefficient. 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, the FAN5400 family is the smallest
solution on the market that provides both charger and USB-OTG boost
functionality.
For flexibility the device’s charging parameters and operating
modes are programmable through an I2C interface, which operates up
to 3.4Mbps. Maximum charge current of up to 1.25A ensures fast
charging times and 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.
Fairchild’s USB expertise, combined with its broad portfolio of
mobile power solutions, allows designers to innovate and
differentiate their mobile offerings. By working with customers, as
well as by identifying developing trends in the marketplace,
Fairchild continues to develop the right power management solutions
that advance mobile designs and enrich the user experience.
Price (each, 1k pcs.): FAN5400 = $1.18
Availability: Samples available now
Delivery: 12 weeks ARO
Contact Information:
To contact Fairchild Semiconductor about this product, please go
to: http://www.fairchildsemi.com/cf/sales_contacts/.
For information on other products, design tools and sales
contacts, please visit: http://www.fairchildsemi.com.
Note to Editor: For a datasheet in PDF format, please go
to:
http://www.fairchildsemi.com/ds/FA/FAN5400.pdf
About Fairchild Semiconductor:
Fairchild Semiconductor (NYSE: FCS) – global presence, local
support, smart ideas. Fairchild delivers energy-efficient,
easy-to-use and value-added semiconductor solutions for power and
mobile designs. We help our customers differentiate their products
and solve difficult technical challenges with our expertise in
power and signal path products. Please contact us on the web at
www.fairchildsemi.com.
Follow us on Twitter @ http://twitter.com/FairchildSemi
View product and company videos, listen to podcasts and comment
on our blog @
http://www.fairchildsemi.com/engineeringconnections
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