PI launches InnoSwitch4-CZ flyback GaN switch IC

2021-05-25: Power Integrations (NASDAQ: POWI), a well-known company in the field of high-efficiency power conversion with high-voltage integrated circuits, recently announced the launch of the InnoSwitch™4-CZ series of high-frequency, zero-voltage switching (ZVS) flyback switcher ICs. InnoSwitch4-CZ devices integrate a reliable and durable 750V primary switch using Power Integrations' PowiGaN™ technology, and a new high-frequency active clamp flyback controller, which can easily design new ultra-compact chargers for mobile phones, tablets and laptops. Today, Anker, a global mobile device charging expert, launched the first batch of consumer charging devices based on InnoSwitch4-CZ devices at a YouTube Live event.

Comments Balu Balakrishnan, CEO of Power Integrations: “The introduction of the InnoSwitch4-CZ family of ICs marks a major milestone for gallium nitride (GaN) technology. The PowiGaN switches combined with our active clamping solution, ClampZero™, enable highly efficient designs and extremely compact form factors. We are pleased to have worked closely with the Anker team to bring this new class of mobile chargers to market.”

“We are delighted to be the exclusive launch partner for PI’s InnoSwitch4 chip,” said Anker founder and CEO Meng Yang. “The InnoSwitch4-CZ device’s exceptional integration and operational efficiency are key to the compact design of the Anker Nano II USB-C series.”

The InnoSwitch4-CZ product family uses a thin InSOP-24D package and integrates a 750V switch, primary and secondary controllers, ClampZero interface, synchronous rectification, and feedback circuits that meet safety standards. Steady-state switching frequencies of up to 140kHz minimize transformer size and further improve power density. Compared with previous active clamp flyback methods, the combination of InnoSwitch4-CZ and ClampZero can achieve system efficiency of up to 95% and maintain very high efficiency across input voltage, system load, and output voltage changes. This is achieved through variable frequency asymmetric control with active clamping with intelligent zero voltage switching, thereby achieving both discontinuous and continuous conduction operating modes, greatly improving design flexibility and maximizing efficiency over the entire operating range. The new flyback switcher IC has excellent constant voltage/constant current accuracy, is not affected by peripheral components, and has a no-load power consumption of less than 30mW while providing safety and protection functions such as input voltage detection.

InnoSwitch4-CZ ICs offer variable output voltage constant current characteristics, making them ideal for high-efficiency and compact USB-PD adapters, high power density flyback designs up to 110W, and high-efficiency constant voltage/constant current power supplies. These devices can be fully protected thanks to the new devices offering auto-restart or latching fault response for output overvoltage and undervoltage protection, as well as multiple output undervoltage fault thresholds and latching or hysteretic primary overtemperature protection.

Supply and related resources

For a technical video on the InnoSwitch4-CZ and ClampZero products, click here. The new InnoSwitch4-CZ ICs are priced at $3.85 each in 10,000-piece quantities. For more information, please contact a Power Integrations sales representative.