Power Integrations InnoSwitch4-QR
InnoSwitch4-QR slashes component count in high efficiency flyback designs up to 220 W
Power Integrations recently announced the InnoSwitch4-QR family of high-frequency, quasi-resonant flyback switcher ICs, designed for compact chargers and adapters up to 220 W. These highly integrated devices minimize transformer size and offer high power density without the need for heatsinks, achieving up to 95% system efficiency and as low as 30 mW no-load consumption.
The new ICs feature a robust 750 V PowiGaN primary switch and a steady-state switching frequency of up to 155 kHz. When paired with HiperPFS-5 power factor correction (PFC) ICs, they can deliver up to 220 W output in simple flyback designs for high-power applications that don't require an active clamp drive.
InnoSwitch4-QR devices use Power Integrations’ FluxLink magneto induction communications to provide direct sensing of the output voltage and offer benefits such as accurate regulation and extremely fast transient response. The devices are fully 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.
Reasons to Buy
- Flyback topology delivering up to 220 W without heatsink
- Unprecedented power density and range
- High switching frequency minimizing transformer size
- Ideal for applications that require high output power with simple flyback design
Product Description
The InnoSwitch4-QR family of ICs significantly enhances the efficiency of flyback power converters, especially in applications requiring a compact form-factor. By integrating primary and secondary controllers, a PowiGaN power switch, and safety-rated feedback (FluxLink) into a single IC, the InnoSwitch4-QR devices offer a high level of integration that simplifies the design process and reduces the overall component count.
At the core of the InnoSwitch4-QR product family is a quasi-resonant (QR) flyback controller capable of operating in continuous conduction mode (CCM). This controller employs a variable frequency and variable current limit control scheme, enhancing efficiency and performance.
With advanced features like a frequency jitter oscillator, lossless input line sensing, and comprehensive protection mechanisms, the InnoSwitch4-QR delivers exceptional performance and reliability in a compact package.
The InnoSwitch4-QR ICs incorporate a full array of protection features to ensure robust and reliable operation. These include output overvoltage and over-current limiting, as well as over-temperature shutdown. Additionally, the IC supports combinations of latching and auto-restart protection modes, catering to the diverse requirements of applications such as chargers, adapters, consumer electronics, and industrial systems.
Reference designs and kits
DER-993 – 72 W Power supply for appliances
- 12 V, 6 A output, 90-265 VAC universal input
- Higher than 93% efficiency at 230 VAC input
- Less than 55 mW no-load consumption at 230 VAC input
- Only 44 components, no heatsinks required
DER-1021 – 150 W 2-Stage Flyback 3-Way Dimmable LED Ballast
- 42 V, 3.57 A output, 100-277 VAC input
- Higher than 92.5% system level efficiency
- Integrated PFC function, power factor higher than 0.95
- 3-Way Dimming (0-10VDC, 10 V PWM, and variable resistance)
- Very low adjusted total harmonic distortion (ATHD) and ripple current
Key features
- Quasi-resonant operation for high efficiency
- Robust 750 V PowiGaN primary switch
- High density flyback designs up to 220 W
- Up to 95% efficient
- Less than 30 mW no-load consumption including line sense
- Steady state switching frequency up to 155 kHz, minimizing transformer size
- Synchronous rectification driver and secondary-side sensing
- Integrated FluxLink, HIPOT-isolated, feedback link
- Precise CV/CC accuracy, independent of external components
- Accurate, adjustable output current sense using external sense resistor
Applications
- Servers and PC standby power supplies
- Higher than 92.5% system level efficiency
- Integrated PFC function, power factor higher than 0.95
- 3-Way Dimming (0-10VDC, 10 V PWM, and variable resistance)
- Very low adjusted total harmonic distortion (ATHD) and ripple current
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