Features and Benefits

  • Input-Current Source Limiting
  • Charges 4 Lithium-Ion Batteries
  • Also Charges Ni-Based Batteries
  • Up to 28V Input
  • 300kHz PWM Operation
  • 16-Pin QSOP Package
  • Surface-Mount Construction
  • Fully Assembled and Tested

Product Details

The MAX1873 evaluation kit (EV kit) is a complete, fully assembled and tested PC board that is capable of supplying power to a system load while charging a lithium-ion (Li+) or nickel (Ni)-based battery pack. The EV kit is preset to limit the total source current and the maximum battery-charging current to 3A, and to charge 4-series Li+ cells up to 4.2V each. An analog output voltage proportional to the charging current also permits an ADC or microcontroller to monitor the charging current. The EV kit requires a power source with a minimum output of 18.5V.

The EV kit can be reconfigured to limit the total input current drawn from the power source, the maximum battery-charging current, and the charging cell voltage. The Li+ cell voltage can be set between 4.009V and 4.387V using standard 1% resistors. To charge Li+ battery packs with two or three cells, replace the IC on the EV kit board with one of the ICs listed on the Parts Selection Table.


  • 2-, 3-, or 4-Cell Li+ Battery Pack Chargers
  • 6-, 9-, or 10-Cell Li+ Battery Pack Chargers
  • Desktop Cradle Chargers
  • Handheld Instruments (PDAs, Palmtops)
  • Notebook Computers
  • Portable Desktop Assistants (PDAs)
  • Portable Internet Tablets

Documentation & Resources


Pricing displayed is based on 1-piece.

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.