iW662 Datasheet | Dialog Semiconductor

i W662 AC/DC Secondary-Side Synchronous Rectification and Rapid Charge TM Interface Controller for Qualm® Quick Charge™ 3.0 1 Description The i W662 is an AC/DC secondary-side bo controller for Qualm® Quick Charge TM 3.0 (QC3.0) which includes USB interface, secondary-to-primary munication and synchronous rectification functions in a single IC. The i W662 resides on the secondary side of an AC/DC power supply and allows the adapter to be configured for multi-level output voltages from 3.6V to 12V in 200m V increments, depending on the voltage requested by the mobile device (MD). It can be used in Dialog’s primary-side controlled AC/ DC systems to achieve fast voltage transition, low noload power consumption, and fast dynamic load response. The i W662 uses Dialog’s proprietary XM-m secondary-to-primary digital munication technology. When paired with Dialog’s primary-side controller, the i W1790, the optocoupler can be pletely eliminated in the system. The i W662 transmits all necessary information for rapid charge through the power transformer, including output voltage requests, output current limits, output voltage undershoot, output over-voltage, and fault and reset signals. The i W662 is also an advanced synchronous rectifier (SR) controller with an integrated MOSFET driver, enabling discontinuous mode flyback converters with high efficiency operation. The device works with an external power MOSFET to replace the main rectifying diode on the secondary of a flyback converter, improving efficiency by reducing secondaryside conduction losses. Dialog’s digital adaptive turn-off control technology minimizes turn-off deadtime, eliminating the need for an additional Schottky diode that is typically needed in parallel with the synchronous MOSFET in conventional synchronous rectifiers. The i W662 and i W1790 provide double-layer cable protection. On the secondary side, the i W662 incorporates Dialog’s proprietary D+/D- over-voltage protection to address VBUS...