MC34825

Freescale Semiconductor Technical Data Document Number: MC34825 Rev 4.0, 9/2014 Micro-USB Interface IC Supporting Universal Charging Solution and Wired Accessories 34825 The 34825 is designed to support the Universal Charging Solution (UCS) recommended by the OMTP (Open Mobile Terminal Platform), as well as to use the same 5-pin micro or mini-USB connector for other INTERFACE IC wired accessories. The 34825 supports various types of external power supplies to charge the battery, such as a dedicated AC/DC adapter or a USB port. It has functions built-in to identify the type of the power supply, and sets low or high charging current, based on the current capability of the power supply. The 34825 monitors the power supply, and offers an up to 28 V of overvoltage protection (OVP) to the cell phone against failed power supplies. The 34825 also contains analog switches to multiplex the five pins, to support UART and high speed USB data communication, mono or stereo audio headset with or without a microphone and a cord remote controller, manufacturing or research- (PB-FREE) 98ASA00716D 20-PIN QFN and-development (R/D) test cables, and other accessories. The 34825 monitors both the VBUS status and the resistance between the ID pin and the ground to identify the accessory being plugged into the mini or micro-USB connector. A high-accuracy 5-bit ADC is offered to distinguish 32 levels of ID resistance that are assigned to buttons in a cord remote controller or to identifi...