Datasheet

LTC4269-1
40
42691fc
TYPICAL APPLICATIONS
PoE-Based 12V, 2A Power Supply
100k
150
30.9
20
3.01k
29.4k
20k
BAS21
2.2k
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
10k
1nF
4.7nF
t
t
t
t
33m
FDS2582
10k
15
BAT54
B1100
100
2.2nF
MMBT3906 MMBT3904
FDS3572
1µF
42691 TA04a
SENSE
–
SENSE
+
SG
PG
0.33µH
2.2nF
2kV
t
10µF
12V
2A
+
+
–
1µF
47pF
470pF
10µF
+
2.2µF
15
T1: PCA ELECTRONICS, EPC3410G-LF
OR
PULSE, PA2467NL
T2: PULSE, PE-68386NL
C1: PSLDIC476MH
T2
T1
C1
47µF
PWRGD
LOAD CURRENT (A)
0.2
EFFICIENCY (%)
81
91
93
0.4 0.8 1.2
77
87
79
89
75
73
85
83
0.6 1.6 2.01.0 1.4 1.8
42691 TA04b
42V
IN
48V
IN
57V
IN
LOAD CURRENT (A)
0.2
11.9
12.4
12.5
0.38 0.74 1.1
11.7
12.2
11.8
12.3
11.6
11.5
12.1
12.0
0.56 1.5 20.92 1.3 1.6 1.8
42691 TA04c
42V
IN
57V
IN
50V
IN
V
OUT
(V)
Effi ciency Regulation