Charge controller for NiMH/NiCd cells

In 2003 I became aware of the TEA1102. With this controller, nickel cadmium, nickel metal hydride, lead gel as well as lithium ion cells can be charged with relatively few components.

Picture: TEA1102 charge controller

For NiCd or NiMh batteries the charger works with delta peak detection, Lithium Ion and lead acid cells are charged with constant current / constant voltage. In addition, an overtemperature protection and a timeout are available.

The circuit was mostly taken from the datasheet, the three solder bridges, R6 and R7 are wired according to battery type and capacity and charging current.

Picture: Circuit diagram TEA1102

Picture: Top side of the board
Picture: Bottom side of the board

Since this layout was my very first self-etched one, there are unfortunately no documents left.