MCP73844 - Battery pack not charging fully

The following are some reasons why a battery pack is not charging fully:

  • The MOSFET could be overheating resulting in the battery not charging to its full capacity.
  • The battery pack could be faulty. To test if the problem is with the battery or the circuit: Apply a very low current (100 mA - constant current) to the MOSFET, and input the voltage as per specifications. Observe the battery voltage, if it is slowly rising then you can increase the current in steps up to about 1 A (double check that the battery you are using can handle 1 A current) and observe the battery voltage. If the battery voltage reaches full capacity then you can conclude that the battery is working properly.

  Return to Top

© 2024 Microchip Technology, Inc.
Notice: ARM and Cortex are the registered trademarks of ARM Limited in the EU and other countries.
Information contained on this site regarding device applications and the like is provided only for your convenience and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE. Microchip disclaims all liability arising from this information and its use. Use of Microchip devices in life support and/or safety applications is entirely at the buyer's risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights.