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LTC1921IMS8 Datasheet(PDF) 8 Page - Linear Technology

Part # LTC1921IMS8
Description  Dual .48V Supply and Fuse Monitor
Download  12 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC1921IMS8 Datasheet(HTML) 8 Page - Linear Technology

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8
LTC1921
1921i
MOCD207
FUSE STATUS
SUPPLY
STATUS
1921 F03a
5V
47k
5V
47k
R3
47k
1/4W
–48V OUT
OUT F
–48V
RETURN
VA
3
4
5
7
2
8
1
6
VB
FUSE A
RTN
LTC1921
FUSE B
OUT A
OUT B
SUPPLY A
–48V
SUPPLY B
–48V
R1
100k
F1
F2
R2
100k
OK: WITHIN SPECIFICATION
OV: OVERVOLTAGE
UV: UNDERVOLTAGE
0: LED/PHOTODIODE ON
1: LED/PHOTODIODE OFF
*IF BOTH FUSES (F1 AND F2) ARE OPEN,
ALL STATUS OUTPUTS WILL BE HIGH
SINCE R3 WILL NOT BE POWERED
SUPPLY STATUS
0
1
1
1
VB
OK
UV OR OV
OK
UV OR OV
VA
OK
OK
UV OR OV
UV OR OV
FUSE STATUS
0
1
1
1*
FUSE B
= VB
≠ VB
= VB
≠ VB
FUSE A
= VA
= VA
≠ VA
≠ VA
= LOGIC COMMON
MOC207
STATUS
1921 F03b
5V
OK: WITHIN SPECIFICATION
0: LED/PHOTODIODE ON
1: LED/PHOTODIODE OFF
47k
LOGIC
COMMON
48k
1/2W
–48V OUT
OUT F
VA
3
4
5
7
2
8
1
6
VB
FUSE A
RTN
LTC1921
FUSE B
OUT A
OUT B
SUPPLY A
–48V
SUPPLY B
–48V
100k
–48V
RETURN
100k
FUSE B
= VB
VA
OK
VB
OK
STATUS
0
1
FUSE A
= VA
ALL OTHER CONDITIONS
Figure 3a. Combined Supply Status
Figure 3b. All Outputs Combined
APPLICATIO S I FOR ATIO


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