Power Integrations InnoSwitch™ Series
The Power Integrations InnoSwitch™ family of ICs are highly integrated, off-line CV/CC flyback switcher ICs. They dramatically simplify the design and manufacture of small, efficient, and robust power supplies. The InnoSwitch series integrates a high-voltage power MOSFET, primary-side controller, secondary-side synchronous rectification controller, and FluxLink™ feedback technology into a single surface-mount package.
This unique FluxLink technology enables accurate secondary-side regulation without the need for an optocoupler, significantly reducing component count, improving reliability, and enabling ultra-fast transient response. With variants like InnoSwitch3-Pro for programmable output, InnoSwitch3-CP/EP/CE for various power levels and applications, and the latest InnoSwitch4 for even higher power density, these devices are ideal for USB-PD fast chargers, home appliances, industrial power supplies, and more. LiTong Group, as an authorized PI distributor, provides comprehensive support for selecting and implementing InnoSwitch solutions.
The InnoSwitch series stands out for its exceptional efficiency across the entire load range, robust protection features, and compact footprint, making it a cornerstone for next-generation power conversion designs. Whether you are designing for high power density, stringent efficiency standards, or robust fault protection, the InnoSwitch family offers a tailored solution.
LiTong FAE Review: "The InnoSwitch series truly redefines power supply design. Its integration level is unmatched, allowing our customers to achieve incredible power density and efficiency with minimal external components. The FluxLink technology is a game-changer for reliability, eliminating the weakest link in traditional flyback designs. We've seen fantastic results in USB-PD applications, where its fast transient response and high efficiency are critical."
InnoSwitch™ Series Product Model Table
| Model | Series | Power Range (W) | Voltage (V) | Package | Key Features | Datasheet |
|---|---|---|---|---|---|---|
| INN3378C-H101 | InnoSwitch3-CP | Up to 65W | 90-265VAC | InSOP-24C | Constant Power, High Efficiency, FluxLink | Download |
| INN3679C-H101 | InnoSwitch3-EP | Up to 90W | 90-265VAC | InSOP-24C | Enhanced Performance, High Efficiency, FluxLink | Download |
| INN3870C-H101 | InnoSwitch3-Pro | Up to 100W | 90-265VAC | InSOP-24C | Programmable Output, I2C Interface, FluxLink | Download |
| INN4070C-H101 | InnoSwitch4-CZ | Up to 150W | 90-265VAC | InSOP-24C | Zero Voltage Switching, High Power Density | Download |
Alternative & Matching Part Numbers
Looking for alternatives or complementary components? Contact our sales team for recommendations.
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InnoSwitch™ Series FAQs
Q: What is FluxLink™ technology?
A: FluxLink is Power Integrations' proprietary, high-speed communications link that provides a reliable and accurate feedback path across the isolation barrier without the need for an optocoupler. This improves reliability and reduces BOM cost.
Q: Can InnoSwitch devices be used for USB-PD applications?
A: Absolutely. The InnoSwitch3-Pro and InnoSwitch4 series are particularly well-suited for USB-PD (USB Power Delivery) applications due to their high efficiency, fast transient response, and programmable output voltage capabilities.
Q: What is the difference between InnoSwitch3-CP and InnoSwitch3-EP?
A: InnoSwitch3-CP (Constant Power) is optimized for applications requiring a constant power output characteristic, often seen in USB-PD. InnoSwitch3-EP (Enhanced Performance) offers a broader range of features and higher power capability for general-purpose applications.