AN4319 datasheet(9/28 Pages) STMICROELECTRONICS

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AN4319 Datasheet(PDF) 9 Page - STMicroelectronics

Part #	AN4319

Description	Power over Ethernet - PD converter with 12 V 1 A output

PDF	28 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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9 / 28 page

DocID024885 Rev 1

9/28

AN4319

Measurement results

3.1

Efficiency

Figure 3. Overall and DC/DC efficiency

Figure 3 shows overall and DC/DC efficiencies for the converter. Overall efficiency includes

all loss from RJ45 to the 12 V output voltage rail. DC/DC efficiency is a figure of merit of the

converter standalone, and typically does not include the losses associated to the PoE

interface section, that are: the RJ45 connector, data transformer, bridges, power

consumption of the I/F section of the PM8800A device.

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