Tristar and Tigris chip failure happens when iPhones are not connected to charger cables and adapters that are not factory recommended. Basically, there are an integrated circuits (ICs) on the motherboard that are known as the “Tristar” and “Tigris” chips that control the charging function of the phone along with USB data transfer functionality. All iPhone models made since iPhone 6 are vulnerable to Tristar and/or Tigris chip damage. Easy Phone can perform expert-quality iPhone Tristar and Tigris chip repair.