Simplified Multichemistry SMBus Battery Charger

Multichemistry, SMBus™, Battery Charger Simplifies Construction of Smart Chargers with a Minimum Number of External Components


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 current—scalable 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.

MAX8713: Typical Operating Circuit MAX8713: Typical Operating Circuit Enlarge+

Key Features

  • Over 2A Charge Current
  • Intel SMBus 2-Wire Serial Interface
  • ±0.6% Charge Voltage Accuracy
  • 11-Bit Charge Voltage Resolution
  • 6-Bit Charge Current Resolution
  • Adjustable Switching Frequency
  • +8V to +28V Input Voltage Range
  • Cycle-By-Cycle Current Limit
  • Charges Any Battery Chemistry (Li+, NiCd, NiMH, Lead Acid, etc.)
  • Small, 24-Pin TQFN
  • Applications/Uses

    • Digital Cameras
    • Handset Car Kits
    • Notebook Computers
    • PDAs and Tablet Computers
    • Portable Equipment with Rechargeable Batteries
    Part Number Lithium Ion Cells Protected VIN
    Charging VIN
    Charge Rate Set by Max. ICHG
    Charge Termination Charge Regulation Oper. Temp.
    max max
    28 28 I2C/SMBus 2
    Current Limit
    Max. Voltage
    Smart Battery Control
    Switchmode -40 to +85
    See All Battery Chargers (74)
    Pricing Notes:
    This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

    MAX8713EVKIT: Evaluation Kit for the MAX8713

    Quality and Environmental Data

    Product Reliability Reports: MAX8713.pdf 
    Lead-Free Package Tin (Sn) Whisker Reports

    Related Resources