Datasheet

LTC1921
10
1921f
Complete –48V Telecom Supply Monitor and Hot Swap
TM
Controller
TYPICAL APPLICATIO S
U
+
V
EE
V
DD
C8
100nF
100V
LT4250L
PWRGD
SENSE
C1 470nF 25V
C2
15nF
100V
C3
0.1µF
100V
C4 0.1µF 100V
C6 0.1µF 100V
C5 100µF 100V
C7 100µF 16V
Q1
IRF530
R2 10Ω 5%
R3 1k 5%
R8 100Ω
R4
549k
1%
R5
6.49k
1%
R6
10k
1%
R1
0.02Ω
5%
4
OV
3 2
–48V A
–48V
RTN
–48V B
UV
5
6
8
7
1
GATE
DRAIN
LUCENT
JW050A1-E
V
OUT
+
SENSE
+
TRIM
SENSE
–
V
OUT
–
V
IN
+
9
5V
1921 TA02
8 7 6 5
3
1 2 4
ON/OFF
CASE
V
IN
–
V
OUT
+
V
OUT
–
V
IN
+
CASE
V
IN
–
1N4003
+
LUCENT
FLTR100V10
*
* DIODES INC. SMAT70A
MOC207
R7 51k 5%
MOC207 MOC207 MOC207
FUSE STATUS
SUPPLY A STATUS
R11 47k 1/4W
SUPPLY B STATUS
OUT FV
A
3
4 57
2 8 1
6
V
B
FUSE A
3A 3A
RTN
LTC1921
FUSE B
OUT A OUT B
R10 10k 1W
R9
10k
1W
= DIODES INC. B3100
Hot Swap is a trademark of Linear Technology Corporation