Datasheet

42681fc
LTC4268-1
43
Typical applicaTion
R
tON
100k
R
CLASS
• •
•
•
•
R
SENSE
0.015Ω 1/8W 1%
Q3 Si4488DY
Q4
Si4362DY
R10 91Ω
R20 3.01k 1% R13 29.4k 1%
C18
22µF
16V
R9 20k 1/4W
C19 0.1µF
D11 BAS21
R
CMP
2.1k
R
ENDLY
150k
R27
10k
C26
680pF
R28 10k
R22 15Ω
R15 47Ω R8 10Ω 1/4W
R2 10Ω
R13 B0540W
T2
PA0184
D14 BAT54
R17 330Ω
C
OSC
33pF
C1A 12µF 100V
C8 0.1µF 100V
D1
SMAJ58A
C1B 2.2µF 100V
C
CMP
0.1µF
C33 3300pF
C28
2200pF
C23
4700pF
250VAC
Q7
FMMT718
Q6
FMMT618
C11
220pF
C27 0.1µF
C24 1µF
C21 47µF ×2
C22 100µF
3.3V 4A
L3
0.33µH
T1
PA1558NL
42681 TA02
t
ON
R
PGDLY
15k
PGDLY
V
NEG
V
NEG
V
NEG
S2B
C
SFST
0.033µF
SYNC
R
CLASS
SHDN
SENSE
–
V
CMP
SENSE
+
R
CMP
ENDLY OSC SFST
LTC4268-1
GND
SG
V
PORTP
PWRGD UVLO PGV
CC
I
LIM_EN
FB
C
CMP
PWRGD
L2
4.7µH
L1
0.33µH
C7
1000pF
100V
+
+
C6 100µF
•
Q2
Si4488DY
11.8V 0.27A
C10 22µF ×2
R3 10Ω 1/4W
C4
1500pF
•
Q1
Si4470EY
C5 47µF
5V 2.4A
+
+
+
+
+
100k
V
PORTN
V
PORTN
V
PORTN
16 14 15
1
R6 75Ω
R14 4.7k R18 100k
R21 20k
R5
75Ω
C14
0.01µF
200V
R4
75Ω
24V 30W
AUX POWER IN
J3
C13 0.01µF 200V
C15 0.01µF 200V C16 0.01µF 200V
C44 0.001µF 2kV
R7 75Ω
3 2
RX
–
6
RX
+
3
TX
–
2
TX
+
J1 –54V IN FROM HIGH POWER PSE
RJ45
T3
ETH1–230LD
XFMR
1 7 8 5 4
11
9
10
6 8 7
TO PHY
SPARE
–
SPARE
+
0.1µF
100V
V
PORTP
D2
D3 D4
D5
D6
D7 D8
B2100X8
Q5
FMMT723
10Ω
D9
30W High Efficiency Triple Output PD Supply (Order Demo Circuit DC1080A)