Sunnyvale, Calif. - Maxim Integrated Products' MAX8713, billed as a simplified SMBus-based multichemistry battery charger that uses a minimum number of external components, provides a regulated charge voltage accurate to ±0.5 percent for portable equipment applications such as handset car kits, digital cameras, and cable modems.
This synchronous, step-down chip, using two external n-channel MOSFETs, can deliver upwards of 2 amps (scaleable with a sense resistor) to, for instance, charge one to four lithium-ion cells in series. Charge-current regulation accuracy is 5 percent. The chip's charge-current sense amplifier has low offset error, allowing the use of small-value sense resistors.
The MAX8713 is packaged in a 28-pin QFN (4-by-4 mm) and
is specified for the industrial temperature range (-40 to +85°C). Prices start at $5.04 each (1000-up, FOB USA).