TLK105_16 Datasheet, PDF (79/104 Pages) Texas Instruments – TLK105 TLK106 Industrial Temp, Single Port 10/100Mbs Ethernet Physical Layer

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TLK105
TLK106
SLLSEB8C – AUGUST 2012 – REVISED APRIL 2016
9.9 Power Supply Characteristics
The data was measured using a TLK10x evaluation board. The current from each of the power supplies is
measured and the power dissipation is computed. For the single 3.3-V 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 3.3-V supply, thus the current needed may
also be easily calculated.
9.9.1 Active Power, Single Supply Operation
PARAMETER
100Base-TX /W Traffic (full packet 1518B
rate)
10Base-T /W Traffic (full packet 1518B rate)
TEST CONDITIONS
Single 3.3-V external supply
FROM POWER PINS
203
96
FROM
TRANSFORMER
CENTER TAP
73
211
UNIT
mW
9.9.2 Active Power, Dual Supply Operation
PARAMETER
100Base-TX /W Traffic (full packet
1518B rate)
10Base-T /W Traffic (full packet
1518B rate)
TEST CONDITIONS
Dual external supplies,
3.3 V and 1.55 V
FROM 3.3-V
POWER
53
23
FROM 1.55 V
PFBIN1, PFBIN2
73
35
FROM
UNIT
TRANSFORMER
CENTER TAP
73
mW
212
9.9.3 Power-Down Power
PARAMETER
TEST CONDITIONS⁽¹⁾
IEEE PWDN
Single 3.3-V external supply
Passive Sleep Mode
Active Sleep Mode
IEEE PWDN
Passive Sleep Mode
Dual external supplies,
3.3 V and 1.55 V
Active Sleep Mode
(1) Measured under typical conditions.
FROM 3.3-V POWER
12
71
71
12
21
21
FROM 1.55 V
PFBIN1, PFBIN2
–
–
–
0
23
23
FROM
TRANSFORMER
CENTER TAP
5
5
5
5
5
5
UNIT
mW
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Electrical Specifications
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