Power Integrations (POWI) has rolled the newest member of the ChiPhy charger-interface IC family, the CHY103D IC for off-line AC-DC chargers compatible with the Quick Charge (QC) 3.0 protocol from Qualcomm Technologies.
In combination with POWI’s InnoSwitch AC-DC switcher ICs, the CHY103D incorporates the functionality necessary to support QC 3.0. The QC 3.0 protocol reduces losses in the smart mobile device handset during rapid charging; enabling designers to choose to charge handsets faster or reduce phone touch-temperature during charging.
The IC improves charging efficiency and reduces heat dissipation by enabling voltage changes in 200 mV increments instead of the larger steps (e.g., from 5 volts to 9 or 12 volts) used in many current rapid-charging designs. Mobile devices are able to optimize the supply voltage from the offline charger, minimizing losses in the phone’s internal charge-management system.
Protection features include Adaptive Output Overvoltage Protection (AOVP), which prevents the output from exceeding 120% of the set output voltage, Output Soft Short-circuit Protection (OSSP), which detects partial shorts and stops power delivery to prevent overheating of cable and connector, and a Remote Shutdown Protection (RESP) feature, which enables the powered device to shut the adapter off remotely if a fault is detected.
The device consumes less than 1 mW at 5 V output; in combination with highly efficient InnoSwitch devices, the low power consumption aids designers in complying with stringent efficiency requirements for chargers, such as the upcoming revision to U.S. federal standards for external power supplies.
The device are suitable for battery chargers for mobile devices such as tablets, smartphones, Bluetooth® accessories and various USB power output ports. It is also compatible with Quick Charge 2.0 products.
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