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MAX8672EVKIT

Evaluation Kit for the MAX8672

Product Details

Key Features

Simplified Block Diagram

Technical Docs

Data Sheet Evaluation Kit for the MAX8672 Dec 19, 2006

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.

Key Features

  • 2.7V to 5.5V Input-Voltage Range
  • Charges One- or Two-Cell NiMH Backup Batteries
  • Programmable Charge Voltage and Current
  • Programmable Undervoltage-Lockout (UVLO) Threshold
  • Programmable Charge Timer
  • Two Backup Output Voltages:
    3.05V (Fixed), 20mA Step-Up DC-DC Converter
    1.75V (Adjustable), 20mA LDO
  • 14-Pin, 3mm x 3mm TDFN Package
  • Lead-Free EV Kit
  • Fully Assembled and Tested
  • Applications/Uses

    • PDA, Palmtop, and Wireless Handhelds
    • Smart Cell Phones

    Description

    The MAX8672 evaluation kit (EV kit) is a fully assembled and tested PCB that evaluates the MAX8672 backup-management IC for NiMH batteries. The MAX8672 EV kit charges one- or two-cell NiMH batteries, with the EV kit configured for two-cell applications. Maximum battery-charge voltage, standard-charge current, and trickle-charge current are preprogrammed to 3V, 3mA, and 450µA, respectively, using external resistors. The programmable charge timer is set to 480 minutes. An adjustable battery undervoltage-lockout (UVLO) threshold is preset to 1.6V and shuts down battery-backup functions.

    To support system-supply voltages, the MAX8672 EV kit provides two outputs. Low-voltage backup cells are stepped up to a fixed 3.05V by a low quiescent-current synchronous-rectified step-up DC-DC converter capable of delivering up to 20mA. A low-dropout (LDO) output is set to 1.75V and is capable of providing up to 20mA. The LDO output voltage is adjustable with external resistors.

    The MAX8672 EV kit also features a thermistor input to monitor battery temperature (negative temperature coefficient (NTC) thermistor not included). To simulate a 100kΩ thermistor at TA = +25°C, the EV kit comes with a 100kΩ resistor installed. See the Thermistor Monitor section for details.

    The MAX8672 EV kit comes fully assembled and tested and has an operating temperature range of -40°C to +85°C.

    Simplified Block Diagram

    Technical Docs

    Data Sheet Evaluation Kit for the MAX8672 Dec 19, 2006

    Support & Training

    Search our knowledge base for answers to your technical questions.

    Filtered Search

    Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

    Sampling:
    Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.