The MAX77785/MAX77786 is a high-performance high-input 3.5/5.5A fast charger with Smart Power Selector™. The ICs can operate as a reverse boost converter without an additional inductor, allowing the battery to share its power through the charging port, and offer programmable output voltage from 4.505V to 10.805V. The devices feature fully integrated low-loss power switches to provide a small solution size and high efficiency, even at high input voltage and high charging current. Its high switching frequency allows the use of a smaller-sized inductor. The ICs feature true load disconnection in reverse boost mode and have an adjustable output current protection limit. The device is highly flexible and programmable through I2C configuration. Li-ion, Li-polymer, and LiFePO4battery chemistries are supported. It can also provide fast programmable unplug detection of sources for dynamic system load management. To support a variety of legacy USBs as well as proprietary adapters, the device also integrates BC1.2 detection using the D+ and D- pins.The battery charger includes a Smart Power Selector to accommodate a wide range of battery sizes and system loads. The Smart Power Selector allows the system to start up gracefully when an input source is available, even when the battery is deeply discharged (dead battery) or missing. It can be configured so that when power is applied to the charger input, the battery charging can automatically start.ApplicationsGaming DevicesVR ApplicationsmPOSTablet PCsSmart Power Selector is a trademark of Maxim Integrated Products, Inc.USB Type-C is a registered trademark of USB Implementers Forum, Inc.Power Path is a trademark of Linear Technology Corporation.