Skyworks Solutions' Si3404 and Si3406x products integrate an IEEE 802.3at PoE controller and a high-efficiency DC/DC converter onto a single chip. Both reduce BOM cost and board space with an on-chip TVS protection diode and DC/DC switching FET; the Si3406x also integrates the rectifier diode bridges to reduce cost and board space even further. The low-cost Si3404 comes in a tiny 4 mm x 4 mm QFN for 13 W (class 3) applications. Reaching 90% efficiency, the Si3406x family delivers 25 W (class 4) power with industry-leading on-chip integration in a small 5 mm x 5 mm QFN.
To simplify the PoE design process, Skyworks Solutions offers five evaluation boards (EVBs), each implementing a different power supply topology, optimized for size and efficiency. Every EVB has been tested and passed EMI emissions and is designed for customers to copy into their end products. The complete BOM, schematic, design files, and EMI test reports are included with the EVBs.
| Si3404 Features |
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- 13W 802.3at type 1, class 3 and 802.3af compliant PoE device
- Integrated DC/DC converter:
- Supports flyback or buck topologies
- Tunable switching frequency
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- On-chip TVS protection diode and DC/DC switching FET
- 120 V process technology for high reliability and efficiency
- Tiny 4 mm x 4 mm QFN package
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| Si3406x Features |
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- 25 W 802.3at type 1 or 2, class 4 PoE/PoE+ device family
- Si3406 - feature rich 802.3at type 1 or 2 device
- Si34061 - highest efficiency, highest output power
- Si34062 - lowest standby power
- On-chip rectifier diode bridges, TVS protection diode, and DC/DC switching FET
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- Small 5 mm x 5 mm QFN package
- Integrated DC/DC converter:
- Supports flyback or buck topologies
- Tunable switching frequency
- Up to 90% efficiency
- Automated maintain power signature (MPS) support
- 120 V process technology for high reliability and efficiency
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| Applications |
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- VoIP phones
- Security cameras
- Wireless access points
- Point of sale devices
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- Industrial and machine vision cameras
- Intelligent lighting fixtures
- Connected digital building systems - HVAC sensors, badge readers, door locks, and others
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Skyworks Solutions' Si3404 and Si3406x products integrate an IEEE 802.3at PoE controller and a high-efficiency DC/DC converter onto a single chip. Both reduce BOM cost and board space with an on-chip TVS protection diode and DC/DC switching FET; the Si3406x also integrates the rectifier diode bridges to reduce cost and board space even further. The low-cost Si3404 comes in a tiny 4 mm x 4 mm QFN for 13 W (class 3) applications. Reaching 90% efficiency, the Si3406x family delivers 25 W (class 4) power with industry-leading on-chip integration in a small 5 mm x 5 mm QFN.
