LTC4269-1 Linear Technology Corporation, LTC4269-1 Datasheet - Page 41

• Manufacturer Part Number: LTC4269-1
• Description: IEEE 802.3 At PD And Synchronous No-Opto Flyback Controller
• Manufacturer: Linear Technology Corporation

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TYPICAL APPLICATIONS
+
–
B1100 8 PLCS
54V FROM
DATA PAIR
54V FROM
SPARE PAIR
T1: PCA ELECTRONICS, EPC3410G-LF
T2: PULSE, PE-68386NL
C1: PSLDIC476MH
48V AUXILLIARY
POWER
OR
PULSE, PA2467NL
83
93
91
89
87
85
81
79
77
75
73
0.2
42V
0.4
IN
0.6
SMAJ58A
10k
S1B
LOAD CURRENT (A)
0.1μF
100V
0.8
48V
Effi ciency
IN
107k
1.0
V
PORTP
57V
1.2
BSS63LT1
30.9Ω
24k
36V
PDZ36B
IN
1.4
1.6
V
SHDN
R
V
V
PORTP
CLASS
PORTN
NEG
383k
14.0k
42691 TA04b
1.8
UVLO
SYNC
2.0
PoE-Based 12V, 2A Power Supply
GND
+
OSC
10μF
10μH
33pF
PGDLY
12k
LTC4269-1
2.2μF
t
ON
100k
29.4k
3.01k
ENDLY
BAS21
20Ω
FB
38.3k
R
CMP
V
CC
2.2k
20k
+
C
12.0
12.5
12.4
12.3
12.2
12.1
11.9
11.8
11.7
11.6
11.5
CMP
22μF
0.1μF
0.2
PG
V
CMP
0.38
SENSE
SENSE
1nF
SG
1μF
0.56
+
–
0.74
10k
LOAD CURRENT (A)
Regulation
4.7nF
FDS2582
150Ω
33mΩ
0.92
47pF
100Ω
1μF
1.1
•
•
•
T1
T2
1.3
2.2nF
•
•
2kV
15Ω
470pF
MMBT3906
1.5
2.2nF
50V
LTC4269-1
IN
1.6 1.8
FDS3572
42691 TA04c
42V
57V
0.33μH
10μF
MMBT3904
IN
IN
15Ω
42691 TA04a
BAT54
2
+
C1
47μF
10k
41
42691f
12V
2A