Datasheet

LTC4269-1
41
42691fc
TYPICAL APPLICATIONS
PoE-Based 3.3V, 7A Power Supply
100k
150
30.9
20
3.01k
29.4k
20k
BAS21
1k
38.3k
33pF
0.1µF
100V
22µF
V
PORTP
0.1µF
t
ON
12k
PGDLYV
NEG
S1BS1B
SYNC
R
CLASS
SHDN
V
CMP
R
CMP
ENDLYOSC
LTC4269-1
GND
UVLO
V
PORTP
V
CC
FB
C
CMP
10µH
BSS63LT1
36V
PDZ36B
SMAJ58A
+
V
PORTN
107k
24k
10k
10
54V FROM
SPARE PAIR
54V FROM
DATA PAIR
48V AUXILIARY
POWER
B1100 × 8 PLCS
383k
14.0k
5.1k
2.2nF
6.8nF
t
t
t
t
33m
FDS2582
10k
15
BAT54
100
2.2nF
MMBT3906 MMBT3904
FDS8670
1µF
1µF
16V
42691 TA05a
SENSE
–
SENSE
+
SG
PG
0.18µH
2.2nF
2kV
t
47µF
3.3V
7A
+
+
–
B1100
B0540W
1µF
22pF
2.2nF
10µF
+
2.2µF
5.1
47
T1: PCA ELECTRONICS, EPC3408G-LF
OR
PULSE, PA2466NL
T2: PULSE, PE-68386NL
C1: PSLB20J107M(25)
T2
T1
C1
100µF
PWRGD
Effi ciency Regulation
LOAD CURRENT (A)
0.7
EFFICIENCY (%)
85
90
91
1.4 2.8 4.2
83
88
84
89
82
81
87
86
2.1 5.6 7.03.5 4.9 6.3
42691 TA05b
37V
IN
48V
IN
57V
IN
LOAD CURRENT (A)
3.27
3.42
3.45
3.21
3.36
3.24
3.39
3.18
3.15
3.33
3.30
42691 TA05c
42V
IN
50V
IN
57V
IN
V
OUT
(V)
0.7 1.4 2.8 4.22.1 5.6 7.03.5 4.9 6.3