Faster, easier battery charging with USB

The new Battery Charging Specification from the USB Implementers Forum makes it faster and more convenient to charge the battery in a mobile phone, personal media player, or other handheld device.

NXP is the first to integrate the new specification into its USB product line, and now offers several flexible, low-power USB ICs with battery-charger detection. They all support fully automated hardware detection and manual software control, and provide fast, reliable charging in a small, low-cost format.

With the new specification, PCs and laptops can now provide up to 1.5 A without interfering with the USB protocols, since the higher charging current no longer creates noise that could corrupt the USB data. That means consumers can still get the same reliable performance from the USB connection while charging their batteries faster than ever.

The new standard also makes it easy to use a single charger with all the phones, personal media players, and other portables in the home. And, while traveling, consumers only need a laptop, a laptop charger, and a USB connector to keep all their portables fully charged.

NXP's new ICs detect USB-compliant wall chargers, host chargers, hub chargers, and standard hosts and hubs. They make it possible for the USB connection to differentiate between USB sources and to determine the appropriate level of current for optimal charging.

For existing designs, ISP1601 is a standalone battery-charger detection IC for quick upgrades to the charging function.

For new designs, the ISP1703, ISP1704, and the ISP1707 are ULPI Hi-Speed USB OTG transceivers that combine a full USB physical front-end with battery-charger detection.

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