LTC4264IDE#PBF Linear Technology, LTC4264IDE#PBF Datasheet - Page 17

• Manufacturer Part Number: LTC4264IDE#PBF
• Description: IC CNTRLR PD INTERFACE 12-DFN
• Manufacturer: Linear Technology

Specifications of LTC4264IDE#PBF

• 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: 12-DFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Supply: -

APPLICATIONS INFORMATION
RJ45
RJ45
RJ45
RJ45
1
2
3
6
4
5
7
8
1
2
3
6
4
5
7
8
1
2
3
6
4
5
7
8
1
2
3
6
4
5
7
8
TX
TX
RX
RX
TX
TX
RX
RX
TX
TX
RX
RX
TX
TX
RX
RX
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
SPARE
SPARE
SPARE
SPARE
SPARE
SPARE
SPARE
SPARE
+
+
+
+
–
–
–
–
TRANSFORMER
TRANSFORMER
TRANSFORMER
TRANSFORMER
ISOLATED
ISOLATED
ISOLATED
ISOLATED
WALL
WALL
WALL
WALL
T1
T1
T1
T1
OPTION 3: AUXILIARY POWER APPLIED TO LTC4264 AND PD LOAD
OPTION 2: AUXILIARY POWER INSERTED AFTER LTC4264 WITH SIGNATURE DISABLED
OPTION 1: AUXILIARY POWER INSERTED BEFORE LTC4264
V
V
V
V
+
–
+
–
+
–
+
–
WW
WW
WW
WW
TO PHY
TO PHY
TO PHY
TO PHY
Figure 10. Interfacing Auxiliary Power Source to the PD
OPTION 4: AUXILIARY POWER APPLIED TO ISOLATED LOAD
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
BR1
BR2
BR1
BR2
BR1
BR2
BR1
BR2
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
S1B
D8
D3
SMAJ58A
TVS
D3
SMAJ58A
TVS
D3
SMAJ58A
TVS
D3
SMAJ58A
TVS
0.1µF
100k
100k
100V
C14
V
V
IN
IN
LTC4264
LTC4264
BSS63
V
V
GND
GND
C14
0.1µF
100V
OUT
C14
0.1µF
100V
C14
0.1µF
100V
OUT
SHDN
V
D10
S1B
IN
LTC4264
SHDN
V
IN
LTC4264
V
GND
OUT
V
GND
C1
OUT
C1
S1B
D10
S1B
D9
LOAD
PD
LOAD
PD
• V
• REQUIRES EXTRA DIODE
• SEE APPS REGARDING POWER PRIORITY
• 42V ≤ V
• NO POWER PRIORITY ISSUES
• NO LTC4264 CURRENT LIMITS FOR V
• 42V ≤ V
• NO POWER PRIORITY ISSUES
• LTC4264 CURRENT LIMITS FOR BOTH PoE AND V
WW
C1
C1
ANY VOLTAGE BASED ON PD LOAD
DRIVE
LOAD
WW
PD
WW
ISOLATED DC/DC CONVERTER
≤ 57V
≤ 57V
• V
• SEE APPS REGARDING POWER PRIORITY
• BEST ISOLATION
WW
LOAD
ANY VOLTAGE BASED ON PD LOAD
WW
WW
LTC4264
17
4264f