Fastest possible charging for mobile equipment

April 04, 2013 // By Graham Prophet
Maxim’s intelligent enumerating battery charger provides the quickest and safest and battery charging by automatically detecting adapter types and charging at the highest possible current without an external CPU or system hardware.

Maxim Integrated's MAX77301 Li+ battery charger integrates the intelligence to enumerate with the host device, automatically identify the adapter type, and then determine the fastest rate to charge a battery. With advanced temperature monitoring, the MAX77301 modulates the charge current and battery regulation voltage automatically to maximise safety in any temperature environment. It performs all of these functions without an external CPU or system hardware. The MAX77301 is ideal for mobile equipment, such as cameras, Bluetooth headsets, MP3 players, and portable medical devices.

To enhance battery safety, battery makers often recommend charging “gently” in cold or hot ambient temperatures. This often necessitates use of a microcontroller to monitor and control the charger. The MAX77301 solves this charging problem by automatically setting charge parameters at a safe level. The device also provides full programmability via the I 2C interface, increasing flexibility. Furthermore, it integrates an enumeration and adapter detection engine to maximise charge current. This safety feature and the adapter detection ensure the fastest and safest possible charging. The Smart Power Selector feature allows a portable device to operate with a discharged battery or no battery; charging can be from a USB port, with no extra software required for charger detection or USB enumeration.

In a 25-bump, 2.44 x 2.44 mm wafer-level package (WLP), pricing starts at $ 2.22 (1000)