Datasheet

TLK110
SLLS901D –DECEMBER 2011–REVISED JANUARY 2014 www.ti.com
9.6 Power Supply Characteristics
The data was measured using a TLK110 evaluation board. The current from each of the power supplies is
measured and the power dissipation is computed. For the single 3.3V external supply case the power dissipation
across the internal linear regulator is also included. All the power dissipation numbers are measured at the
nominal power supply and typical temperature of 25°C. The power needed is given both for the device only, and
including the center tap of the transformer for a total system power requirement. The center tap of the
transformer is normally connected to the 3.3V supply, thus the current needed may also be easily calculated.
9.6.1 Active Power, Single Supply Operation
PARAMETER TEST CONDITIONS FROM POWER PINS FROM UNIT
TRANSFORMER
CENTER TAP
100Base-TX /W Traffic (full packet 1518B
203 73
rate)
Single 3.3V external supply mW
10Base-T /W Traffic (full packet 1518B rate) 96 211
9.6.2 Active Power, Dual Supply Operation
PARAMETER TEST CONDITIONS FROM 3.3V FROM 1.55V FROM UNIT
POWER PFBIN1, PFBIN2 TRANSFORMER
CENTER TAP
100Base-TX /W Traffic (full packet
53 73 73
1518B rate)
Dual external supplies,
mW
3.3V and 1.55V
10Base-T /W Traffic (full packet
23 35 212
1518B rate)
9.6.3 Power-Down Power
PARAMETER TEST CONDITIONS
(1)
FROM 3.3V POWER FROM 1.55V FROM UNIT
PFBIN1, PFBIN2 TRANSFORMER
CENTER TAP
IEEE PWDN Single 3.3V external supply 12 – 5
Passive Sleep Mode 71 – 5
Active Sleep Mode 71 – 5
mW
IEEE PWDN Dual external supplies, 12 0 5
3.3V and 1.55V
Passive Sleep Mode 21 23 5
Active Sleep Mode 21 23 5
(1) Measured under typical conditions.
80 Electrical Specifications Copyright © 2011–2014, Texas Instruments Incorporated
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