LTC4267IGN-1#TRPBF Linear Technology, LTC4267IGN-1#TRPBF Datasheet - Page 18
LTC4267IGN-1#TRPBF
Manufacturer Part Number
LTC4267IGN-1#TRPBF
Description
IC POE 802.3AF INTERFACE 16SSOP
Manufacturer
Linear Technology
Datasheet
1.LTC4267IGN-1PBF.pdf
(32 pages)
Specifications of LTC4267IGN-1#TRPBF
Controller Type
Power over Ethernet Controller (POE)
Interface
IEEE 802.3af
Current - Supply
3mA
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
16-SSOP
Linear Misc Type
Negative Voltage
Package Type
SSOP N
Operating Supply Voltage (max)
-57V
Operating Temperature (min)
-40C
Operating Temperature (max)
85C
Operating Temperature Classification
Industrial
Product Depth (mm)
3.99mm
Product Height (mm)
1.5mm
Mounting
Surface Mount
Pin Count
16
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Supply
-
Lead Free Status / Rohs Status
Compliant
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LTC4267-1
designer should determine which power category the PD
falls into and then select the appropriate value of R
from Table 2. If a unique load current is required, the value
of R
where I
classifi cation and is given in the electrical specifi cations.
The R
grading the overall accuracy of the classifi cation circuit.
18
APPLICATIO S I FOR ATIO
R
CLASS
CLASS
CLASS
IN_CLASS
can be calculated as:
= 1.237V/(I
resistor must be 1% or better to avoid de-
is the LTC4267-1 IC supply current during
U
DESIRED
Figure 10. PD Front End with Isolation Transformer, 2nd Schottky Diode Bridge
U
– I
IN_CLASS
W
)
U
CLASS
Resistor power dissipation will be 50mW maximum and
is transient so heating is typically not a concern. In order
to maintain loop stability, the layout should minimize
capacitance at the R
can be disabled by fl oating the R
should not be shorted to V
LTC4267-1 classifi cation circuit to attempt to source very
large currents and quickly go into thermal shutdown.
CLASS
node. The classifi cation circuit
PORTN
CLASS
as this would force the
pin. The R
CLASS
42671f
pin