Power Integrations Introduces InnoSwitch4-CZ Flyback Switcher ICs for Mobile Charging Devices

By Tiera Oliver

Associate Editor

Embedded Computing Design

May 24, 2021


Power Integrations Introduces InnoSwitch4-CZ Flyback Switcher ICs for Mobile Charging Devices

Power Integrations announced the InnoSwitch4-CZ family of high frequency, zero voltage switching (ZVS) flyback switcher ICs.

InnoSwitch4-CZ devices incorporate a robust 750 V primary switch using Power Integrations’ PowiGaN technology and a high frequency active clamp flyback controller to facilitate ultra-compact chargers suitable for phones, tablets, and laptops. The first consumer devices based on InnoSwitch4-CZ devices were introduced by Anker, the global charging provider for mobile devices, through a YouTube Live event which can be accessed here.

The InnoSwitch4-CZ family incorporates 750 V switch, primary and secondary controllers, ClampZero interface, synchronous rectification, and safety-rated feedback in a single, compact InSOP-24D package. Per the company, a steady state switching frequency of up to 140 kHz minimizes transformer size, further increasing power density. In contrast with older active clamp flyback approaches, the InnoSwitch4-CZ and ClampZero combination provides up to 95% efficiency and maintains high efficiency across variations in line voltage, system load, and output voltage. This is achieved with variable frequency asymmetrical control of the active clamp with intelligent zero-voltage switching, enabling both discontinuous and continuous conduction modes of operation. The new flyback switcher ICs enable ideal CV/CC accuracy, independent of external components, and consume less than 30 mW no-load including line-sensing safety and protection features.

Targeting high efficiency compact USB PD adapters, high-density flyback designs up to 110 W, and high-efficiency CV/CC power supplies, InnoSwitch4-CZ ICs provide variable output voltage and constant current profiles. Devices are protected featuring auto-restart or latching fault response for output over-voltage and under-voltage protection, multiple output under-voltage fault thresholds and latching, or hysteretic primary over-temperature protection.

A technical overview video of the InnoSwitch4-CZ and ClampZero devices is available here. The new InnoSwitch4-CZ ICs are priced at $3.85 per unit in 10,000-unit quantities. 

For more information, visit: www.power.com.

Tiera Oliver, Associate Editor for Embedded Computing Design, is responsible for web content edits, product news, and constructing stories. She also assists with newsletter updates as well as contributing and editing content for ECD podcasts and the ECD YouTube channel. Before working at ECD, Tiera graduated from Northern Arizona University where she received her B.S. in journalism and political science and worked as a news reporter for the university’s student led newspaper, The Lumberjack.

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