Richtek RTQ2116A

Description

The RTQ2116A combines a charging port controller and a 3A synchronous buck converter. The RTQ2116A provides the electrical signatures on D+/D- to support charging schemes compatible with the USB 2.0 Battery Charging Specification BC1.2 and Chinese Telecommunication Industry Standard YD/T 1591-2009. Auto-detect mode is also integrated which supports USB 2.0 Battery Charging Specification BC1.2 Dedicated Charging Port (DCP), Divider 3 mode and 1.2V shorted mode to comply with the legacy fast charging mode of mobile devices. The RTQ2116A integrates a high efficiency, monolithic synchronous buck converter that can deliver up to 3A output current from a 3V to 36V wide range input supply and is protected from load-dump transients up to 42V. The RTQ2116A has constant current control to achieve adjustable USB current limit and implement the current sense signal for adjustable USB power output voltage with load line compensation. The converter includes optional spread-spectrum frequency modulation to overcome EMI issue and complete protection for safe and smooth operation in all applied conditions. Protection features include cycle-by-cycle current limit for protection against shorted outputs, soft-start control to eliminate input current surge during start-up, input under-voltage lockout, output under-voltage protection, output over-voltage protection and over-temperature protection. The RTQ2116A can be used to support Type-A connector. The RTQ2116A is fully specified over the temperature range of TJ = -40°C to 125°C and available in WET-WQFN-32L 5x5

Features

• USB Charging Port Controller-Support D+/D- DCP Modes per USB BC1.2-Support D+/D- Shorted Mode per Chinese Telecommunication Industry Standard YD/T 1591-2009-Support Automatic Selection Mode for D+/D Shorted / Divider 3 / 1.2V Mode
• 36V 3A Synchronous Buck Converter-3V to 36V Input Voltage Range-3A Continuous Output Current-CC/CV Mode Control-Adjustable and Synchronizable Switching Frequency : 300kHz to 2.2MHz
• Selectable PSM/PWM at Light Load-Adjustable Soft-Start-Adjustable USB Power Output Voltage between 5V and 6V with Load Line Compensation-Optional Spread-Spectrum Frequency Modulation for EMI Reductions
• Power Good Indicator
• Enable Control
• ±8kV HBM on DS+/DS-
• Over-Temperature Protection
• AEC-Q100 Grade 1 Qualified
• Cycle-by-Cycle Over-Current Limit Protection
• Input Under-Voltage Protection
• Adjacent Pin-Short Protection
• -40°C to 125°C Operating Ambient Temperature
• DS+/DS- OVP

Typical applications

• Automotive Car Chargers, USB Power Chargers

More information

• Datasheet
• IC product information