Reference design kit for a 10W CV/CC USB charger

InnoSwitch ICs combine the primary-side switch together with primary and secondary controllers and feedback circuits into a single, worldwide safety-rated, surface-mount package.

Innoswitch ICs leverage accurate secondary-side regulation using Power Integrations’ high-speed digital FluxLink technology to communicate direct voltage and current measurements across the safety isolation barrier. This new feedback technique permits precise control without the need for a bulky optocoupler, while avoiding the performance compromises inherent in primary-side regulation, such as limited accuracy and efficiency and poor transient response versus no-load consumption. Other benefits include: ±3% CV, ±5% CC regulation; cable voltage-drop compensation; built-in synchronous rectification driver for high efficiency; less than 10mW no-load input power; and accommodation of transformer manufacturing tolerances.

Shyam Dujari, Director of Product Marketing, Power Integrations, said: “This reference design shows the high power density, high performance and high efficiency that can be achieved using our InnoSwitch ICs. The excellent no-load performance is one of the key reasons why several of the world’s leading mobile device makers are already in mass production of chargers using InnoSwitch ICs.”