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Switch-mode chargers with JEITA-compliant offer battery-temperature monitoring for mobile devices

May 04, 2010 | Paul Buckley | 222900890
Switch-mode chargers with JEITA-compliant offer battery-temperature monitoring for mobile devices Maxim Integrated Products has introduced switch-mode DC-DC chargers with JEITA-compliant battery-temperature monitoring for safely charging 1-cell lithium-ion (Li+) or lithium-polymer (Li-Poly) batteries.
The company claims that the devices are the first chargers to integrate ±20 V overvoltage protection, which allows them to provide added safety and reliability without external switches.      

The MAX8900A/MAX8900B operate at a high switching frequency of 3.25 MHz to allow the use of tiny external components. They deliver up to 1.2 A of charge current to the battery from 3.4 V to 6.3 V (MAX8900A) or 3.4 V to 8.7 V (MAX8900B) without generating excessive heat. Low heat and small solution size make these chargers ideal for space-constrained portable devices such as smartphones, Bluetooth headsets, portable media players (PMPs), and mobile Internet devices (MIDs).     

The maximum charge current for MAX8900A/MAX8900B can be programmed from 50 mA to 1200 mA using a small external resistor. Other charger parameters, such as the safety timer and prequalification current, are also adjustable to provide maximum flexibility for system designers to meet their application requirements.     

Availability and Pricing     

The MAX8900A/MAX8900B are available in a 2.44 mm x 2.67 mm x 0.6 4mm, 40-bump wafer-level package (WLP) with a 0.4 mm pitch, and are fully specified over the -40 to +85 degrees Celsius extended temperature range.  Prices start at 1.65 US Dollars (1000-up, FOB USA). An evaluation kit is available to speed designs.     

Datasheet: MAX8900A









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