USB3751A-1-A4-TR

The USB3751A integrates many features that have historically been discrete devices in a mobile product. This device provides significant VBUS protection for the entire system, robust USB interface ESD protection, a USB 2.0 compliant High Speed switch, and USB-IF Battery Charger Detection (revision 1.2) capabilities that are essential to the latest mobile products. Several advanced features allow the USB3751A to be optimized for portable applications and to reduce both eBOM part count and printed circuit board (PCB) area. Outstanding ESD robustness eliminates the need for external ESD protection devices. In addition to the integrated ESD protection on the USB interface, the USB3751A provides VBUS Over-Voltage Protection (OVP). The USB3751A integrated battery charger detection circuitry supports USB-IF Battery Charger Detection. Battery charger detection will begin automatically whenever VBUS rises above the UVLO threshold, and can also be completed manually through the I2C interface. The USB3751A can detect a range of USB battery chargers including a Standard Downstream Port (SDP), a Charging Downstream Port (CDP), and a Dedicated Charging Port (DCP). The I2C interface gives processor control over the USB Switch, charger detection, OVLO settings, and status of the USB3751A. In addition, custom charger detection can be implemented through the I2C interface. The USB3751A family is enabled with Microchip's RapidCharge AnywhereTM which supports USB-IF Battery Charging 1.2 for any portable device (Note 1). RapidCharge AnywhereTM provides three times the charging current through a USB port over traditional solutions which translate up to 1.5 amps via compatible USB host or dedicated charger. In addition, this provides a complete USB charging ecosystem between device and host ports such as Dedicated Charging Port (DCP), Charging (CDP) and Standard (SDP) Downstream Ports.

• VBUS Over-Voltage Protection - Protects internal circuits from VBUS up to 9V - Over-Voltage/Under-Voltage Lockout opens VBUS switch - Interrupt to indicate Over-Voltage/Under-Voltage Lockout - Integrated Low RDSON FET
• USB Port ESD Protection (DP/DM/VBUS) - ±15kV (air discharge) - ±15kV (contact discharge) - IEC 61000-4-2 level 4 ESD protection without external devices
• High Speed USB Mux for multiplexing the USB lanes between different functions (USB3750 only) - Switch the USB connector between two different functions - High bandwidth USB switch passes HS USB signals
• Provides USB Battery Charger Detection for: - USB-IF Battery Charging compliant Dedicated Charging Ports (DCP) - USB-IF Battery Charging compliant Charging Downstream Port (CDP) - Standard Downstream Port (SDP); i.e. USB host or downstream hub port - Dedicated SE1 type chargers - Allows 100 mA trickle charging from VBUS when attached to a Standard Downstream Port (SDP) while not enumerated