Smsc LAN9512 User Manual download pdf (Page 39)

USB Hub with Integrated 10/100 Ethernet Controller

Datasheet

SMSC LAN9512 39 Revision 1.0 (04-20-09)

DATASHEET

4.3 Power Consumption

This section details the power consumption of the device as measured during various modes of

operation. Power dissipation is determined by temperature, supply voltage, and external source/sink

requirements.

4.3.1 Operational Current Consumption & Power Dissipation

Note: All values measured with maximum simultaneous traffic on the Ethernet port and all USB ports.

Note: Magnetic power consumption:

 100BASE-TX: ~42mA

 10BASE-T: ~104mA

Table 4.1 Operational Current Consumption & Power Dissipation (VDD33IO = VDD33A = 3.3V)

PARAMETER MIN TYPICAL MAX UNIT

100BASE-TX Full Duplex (USB High-Speed)

Supply current (VDD33IO, VDD33A) 231 mA

Power Dissipation (Device Only) 763 mW

10BASE-T Full Duplex (USB High-Speed)

Supply current (VDD33IO, VDD33A) 188 mA

Power Dissipation (Device Only) 621 mW

10BASE-T Full Duplex (USB Full-Speed)

Supply current (VDD33IO, VDD33A) 152 mA

Power Dissipation (Device Only) 502 mW

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Smsc LAN9512 User Manual Page 39