Datasheet

LTC4269-1
39
42691fc
TYPICAL APPLICATIONS
PoE-Based 5V, 5A Power Supply
100k
150
30.9
20
3.01k
27.4k
39k
BAS21
1.2k
38.3k
33pF
0.1µF
100V
10µF
V
PORTP
0.1µF
t
ON
12k
PGDLYV
NEG
S1B
B1100
S1B
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
T1: PCA ELECTRONICS, EPC3409G-LF
OR
PULSE, PA2369NL
T2: PULSE, PE-68386NL
C1: PSLB20J107M(45)
54V FROM
DATA PAIR
48V AUXILIARY
POWER
B1100 × 8 PLCS
383k
14.0k
10k
1nF
3.3nF
t
t
t
t
33m
FDS2582
10k
15
BAT54
100
2.2nF
MMBT3906 MMBT3904
T2
FDS8880
1µF
T1
42691 TA03a
SENSE
–
SENSE
+
SG
PG
PWRGD
0.18µH
C1
100µF
2.2nF
2kV
t
47µF
5V
5A
+
+
–
1µF
22pF
1.5nF
10µF
+
2.2µF
5.1
5.04.5
EFFICIENCY (%)
80
90
92
76
86
78
88
74
72
84
82
OUTPUT CURRENT (A)
42691 TA03b
42V
PORT
57V
PORT
0.5 1.0 2.0 3.01. 5 4. 02.5 3.5
50V
PORT
Effi ciency Regulation
OUTPUT CURRENT (A)
0
EFFICIENCY (%)
4.95
5.20
5.25
1.0 2.0 3.0
4.85
5.10
4.90
5.15
4.80
4.75
5.05
5.00
0.5 1.5 4.0 5.02.5 3.5 4.5
42691 TA03c
42V
PORT
57V
PORT
50V
PORT