| Customization: | Available |
|---|---|
| Conductive Type: | Bipolar Integrated Circuit |
| Integration: | MSI |
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SI3404-A-GMR: Power Over Ethernet Controller 1 Channel 802.3at (PoE) 20-QFN (4x4)
Mfr. Part#: SI3404-A-GMR
Mfr.: SILICON LABS
Datasheet: 
(e-mail or chat us for PDF file)
ROHS Status:
Quality: 100% Original
Warranty: ONE YEAR
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Product Status
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Active
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Type
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Controller (PD), DC/DC
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Number of Channels
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1
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Power - Max
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15.4 W
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Internal Switch(s)
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Yes
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Auxiliary Sense
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Yes
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Standards
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802.3at (PoE)
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Voltage - Supply
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1.5V ~ 57V
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Current - Supply
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-
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Operating Temperature
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-40°C ~ 85°C
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Mounting Type
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Surface Mount
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Package / Case
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20-VFQFN Exposed Pad
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Supplier Device Package
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20-QFN (4x4)
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Base Product Number
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SI3404
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Fully-Integrated IEEE 802.3 Type 1-Compliant POE PD Interface and High-Efficiency Switching Regulator with Compact Footprint
The Si3404 integrates the power management and control functions required in a Power-over-Ethernet (PoE) powered device (PD) application. These devices convert the high voltage supplied over the 10/100/1000BASE-T Ethernet connection to a regulated, low-voltage output supply. The optimized architecture of this device minimizes the solution footprint and external BOM cost and enables the use of low-cost external components while maintaining high performance. The Si3404 integrates a transient surge suppressor. The switching power FET and associated functions are also integrated. The integrated, current mode controlled switching regulator supports isolated or non-isolated flyback and buck converter topologies. The switching frequency for the regulator is tunable with a simple external resistor value to help avoid unwanted harmonics for better emissions control. This device fully supports the IEEE 802.3at specification for Type 1, single-event classification. Standard external resistors provide the proper IEEE 802.3 signatures for the detection function and programming of the classification mode, and internal startup circuits ensure well-controlled soft-start initial operation of both the hotswap switch and the voltage regulator. The Si3404 is available in a low-profile, 20-pin, 4 x 4 mm QFN package.
APPLICATION
• Voice over IP telephones • Wireless access points • Security and surveillance IP cameras • Point-of-sale terminals • Internet appliances • Network devices
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