Thursday, March 02, 2017

Fast-Charge Controllers - MAX712 and MAX713

Uses MAX712/MAX713 fast charge controllers. PCB Design too. The only difference between them is the battery-fully-charged sensing method. The MAX713 is designed for NiCd batteries, while the 712 is for NiMh batteries.

Fast, smart and universal NiCd/NiMh battery charger

This is a project by Roberto Barrios at his Ham Projects EB4EQA Site.

Application Note - The MAX712 terminates fast charge by detecting zero voltage slope, while the MAX713 uses a negative voltage-slope detection scheme.

Fast-Charge Controllers - MAX712

The MAX712/MAX713 are powered by the DC source via an on-board +5V shunt regulator. They draw a maximum of 5µA from the battery when not charging.

Fast-Charge Controllers - MAX712 and MAX713

Some Specs
  • Charge 1 to 16 Series Cells
  • Supply Battery's Load While Charging (Linear Mode)
  • Fast Charge from C/4 to 4C Rate
  • C/16 Trickle-Charge Rate
  • Automatically Switch from Fast to Trickle Charge