Power Integrations Introduces InnoSwitch4-CZ Flyback Switcher ICs for Mobile Charging Devices
May 24, 2021
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.