Power

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

16th April 2015
Nat Bowers
0

Based on the company’s InnoSwitch-CH family of integrated switcher ICs, Power Integrations has announced a reference design kit for a 10W CV/CC USB charger. RDK-420 enables users to build an 85-264VAC input smart mobile / USB charger with 5V, 2A output, measured in accordance with new US Department of Energy standards and European Union Code of Conduct Version 5, Tier 2 at the end of a USB cable.

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.”

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