Check out these resources from Intersil for your power management, analog and mixed-signal semiconductor needs:

Putting Safety into Li-ion Battery Packs - This white paper discusses the detection blocks and how they apply to the state of the power FETs to ensure safe operation of Li-ion battery packs.

Powering IoT Infrastructure Systems - This white paper examines the evolution of the multiphase converter architecture from analog to digital implementations, and compares the various control mode schemes.

Selecting the Right Battery Chemistry for Automotive Safety Applications - This white paper explains Li-ion and LiFePO4 chemistries, including their characteristics and charging profiles. It also identifies charging solutions that derive the maximum energy from the battery while maximizing battery life and reliability.