Fairchild Semiconductor’s Eco-Friendly Battery Charger Reduces Charge Time and Powers USB Peripherals

Device Offers a Fast, Accurate High-Efficiency Switching Charger with Integrated 500mA USB On-the-Go (OTG) Power Supply

SAN JOSE, Calif. — (BUSINESS WIRE) — April 17, 2013 — Today’s mobile devices are becoming powerful computing products, with an increasingly feature-rich, immersive user experience. With the emergence of USB charging standards and the continuing trend for electronic devices, especially handsets, to be powered through the USB port, product designers are faced with the challenge of enabling advanced product features while quickly and safely charging high-capacity batteries and supporting connected peripherals.

Fairchild Semiconductor's Eco-Friendly Battery Charger Reduces Charge Time and Powers USB Peripheral ...

Fairchild Semiconductor's Eco-Friendly Battery Charger Reduces Charge Time and Powers USB Peripherals (Photo: Business Wire)

Fairchild Semiconductor’s (NYSE: FCS) FAN54015 USB-compliant single-cell Li-ion switching charger provides designers a balance of safety, accuracy, efficiency, and solution size for charging mobile device batteries.

To reduce charge time and mitigate heat dissipation, the FAN54015 switching charger employs a high-efficiency, eco-friendly, 3MHz DC-DC synchronous buck converter capable of supplying 1.45A. Additionally, to accommodate legacy and emerging lithium battery technologies, the regulated battery float voltage can be programmed from 3.5V to 4.44V. The device’s innovative system architecture allows reverse use of the switch-mode buck converter, resulting in a 500mA USB on-the-go (OTG) boost regulator, and providing power for USB peripherals.

To protect the battery and maximize mobile device usage time, the FAN54015 device supports battery charging in three phases: pre-conditioning, constant current (CC), and constant voltage (CV). An integrated over-voltage protection (OVP) FET blocks current flow when the input voltage reaches dangerous levels, eliminating the need for an external protection MOSFET and thereby reducing complexity and bill of material (BOM) costs.

The FAN54015 charger is fully programmable via an I2C interface, allowing setup of custom charging profiles and is part of a growing family of battery charging solutions that combine safety, accuracy, and fast charging time, while reducing overall solution cost.

Features and Benefits:

  • Fast charging for single cell lithium battery with 1.45A current
  • Cooler and safer device charging with greater than 95 percent efficiency
  • Longer battery life with lowest quiescent current and greater than 94 percent efficiency in USB-OTG
  • Input and battery over-voltage protection and thermal regulation
  • Programmability of input and output power and OTG boost regulator
  • 0.5 percent voltage regulation and 3.0 percent charge current accuracy ensures complete charge of the battery
  • Tiny footprint 1.96mm x 1.87mm, 20-bump WL-CSP package with minimal external components
  • Pulse width modulated (PWM), 3MHz, synchronous buck converter enables use of a tiny 1µH inductor

Price: in 1,000 quantity pieces

FAN54015         US $1.27

Availability: Samples available upon request

Delivery: 8-12 weeks ARO

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, enrich the user experience and extend usage-times.

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