Dialog Semiconductor iW630+iW1780+iW671 Rapid Charge adapter chipset

Dialog Semiconductor has released its iW630+iW1780+iW671 Rapid Charge adapter chipset. The chipset provides the high efficiency and power density needed for small-form-factor, fast-charging smartphones and mobile device power adapters.

The iW630 Rapid Charge interface IC works with Dialog’s iW1780 PrimAccurate primary-side digital pulse width modulation (PWM) controller. The iW1780 uses a secondary-to-primary digital communication link signal to receive all rapid charge commands and then dynamically scales the output voltage regulation and output current limit of the power adapter to deliver more power through a standard USB cable.

Current sensing is performed by the iW1780 on the primary side, eliminating the need for a secondary-side current sense resistor for a high-efficiency solution. The iW671 synchronous rectifier further boosts efficiency by up to 88%.