USB Type-C Charger

The MAX14748 USB battery charger integrates a charger detector, boost/buck converter, and Li+ battery charger with smart power selector to provide fast and safe charging of 2s Li+ battery packs.

The MAX14748 provides support for devices functioning as a UFP/DRP per the USB Type-C 1.1 standard, while also providing detection of legacy USB Battery Charging Specification, Revision 1.2 (BC1.2) compliant chargers in addition to other nonstandard chargers. The programmable Automatic Input Current Limiting (AICL) feature ensures that maximum safe current is drawn from the charging adapter.

The Li+ charger includes an automatic Smart Power Selector™ to simultaneously charge the battery and provide power to the system load. The Smart Power Selector function will supplement the system power with the battery if power from the charging adapter is insufficient. The Li+ charger features JEITA thermal monitoring and charger voltage/current reduction or charger disable.

The MAX14748 is available in a 54-bump, 0.4mm pitch, 3.97mm x 2.77mm x 0.64mm wafer-level package (WLP) and operates over the -40°C to +85°C extended temperature range.

Applications

* Digital Imaging (DSC, DVC) * Handheld Barcode Readers * Wireless Speakers

* Minimize Power Management Footprint Through High Integration

* 13mΩ (typ) Integrated Battery To System Switch

* Thermal Current Limiting

* DC-DC Converter with Boost and Reverse Buck

* High Efficiency

* 92% in Boost Mode at 1A Output Current and 7.4V Battery Voltage

* 94% in Reverse Buck Mode at 500mA Output

* Internal USB Switch for USB D+/D- Data Lines

* Easy-to-Implement Li+ Battery Charging

* Charges 2s Li-Ion Batteries from Legacy 5V USB Adapters

* 15W Input Power with 3A Type-C Adapter

* 7.5W Input Power with DCP Adapter

* 1A System/Charge Current From DCP Adapter

* 2A System/Charge Current From 3A Type-C Adapter

* DRP Mode USB Type-C Specification, Rev 1.1 Compliant

* UFP Mode USB Type-C Specification, Rev 1.1 Support

* VCONN and Super-Speed Multiplexer Logic Controls

* Non-Standard DCP Detection

* USB Battery Charging Specification, Rev 1.2 Compliant

* Automatic Input Current Limit (AICL) Power Management

* Support Weak/Dead Batteries Detection

* Smart Power Selector

* Thermistor Monitor

* Various Protection Features

* 28V Integrated Overvoltage Protection

* JEITA Charge Protection

* ±15kV ESD Protection on USB Adapter Pins