The MAX8713 multichemistry battery charger simplifies
construction of smart chargers with a minimum number
of external components. It uses the Intel System
Management Bus (SMBus) to control the charge voltage
and charge current. High efficiency is achieved
through the use of a constant off-time step-down topology
with synchronous rectification.
The MAX8713 charges one to four lithium-ion (Li+) cells
in series and delivers over 2A charge currentscalable
with the sense resistor. The MAX8713 drives n-channel
MOSFETs for improved efficiency and reduced cost. A
low-offset charge-current-sense amplifier provides high accuracy
charge current with small sense resistors.
The MAX8713 is available in a space-saving 24-pin,
4mm x 4mm TQFN package and operates over the
extended (-40°C to +85°C) temperature range. An evaluation
kit is available to reduce design time.