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==
=1=LTC1921 !"#$%&'()*+,-.
09/02/290
MOC207
MOC207
MOC207
FUSESTATUS
SUPPLY ASTATUS
DN290 F01
5V47k
5V47k
5V47k
R347k1/4W
SUPPLY BSTATUS
OK: WITHIN SPECIFICATIONOV: OVERVOLTAGEUV: UNDERVOLTAGE
–48V OUT
= LOGIC COMMON
0: LED/PHOTODIODE ON1: LED/PHOTODIODE OFF*IF BOTH FUSES (F1 AND F2) ARE OPEN, ALL STATUS OUTPUTS WILL BE HIGH SINCE R3 WILL NOT BE POWERED
OUT F
–48VRETURN
VA
3
4
57
2
8
1
6
VB
FUSE A
F1 D1
D2F2
RTN
LTC1921
FUSE B OUT A
OUT B
SUPPLY A–48V
SUPPLY B–48V
R1100k
R2100k
SUPPLY ASTATUS
0011
VBOK
UV OR OVOK
UV OR OV
VAOKOK
UV OR OVUV OR OV
SUPPLY BSTATUS
0101
FUSE STATUS011
1*
FUSE B= VB≠ VB= VB≠ VB
FUSE A= VA= VA≠ VA≠ VA
J 48V !"#$J= ! 290
Brendan Whelan
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LTC1921 !"#$%&'(J48V !
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LTC1921 !"#$%&'()=100V
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LTC1921 !"#$%&'()*+,-.
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LTC1921 !"#$%&=VA =VB = !"
=====LTC==LT= !"#$%&'(
Hot Swap= !"#$%&'(
LINEAR TECHNOLOGY CORPORATION 2002
dn290f 0702 29K • PRINTED IN CHINA
!"#$%&'()*+,-./0 !"#$%&'()*+%,-. !"#$%&'www.linear.com.cn
!"#
http://www.linear.com.cn/go/dnLTC1921
!"#Linear Technology Corporation Ltd.www.linear.com.cn !"#$#% OOP
!" O ONMU
(852)2428-0303 (852)2348-0885
!"#!$%& OOT
! NSNM
200003 (86)21-6375-9478 (86)21-6375-9479
!"#$%Cytech Technology Ltd.www. cytecht.com !"(852)2375-8866 (852)2375-7700 !"(010)8268-4280 (010)8268-4277 !"(028)522-4111 (028)523-9451 !"(023)6860-8938 (023)6860-8938 !"(020)8762-7232 (020)8762-7227 !"(025)481-0877 (025)480-8023 !"(021)6440-1373 (021)6440-0166 !"(0755)8386-7431 (0755)8386-7954 !"(029)837-9818 (029)837-9819 !"(027)8736-0546 (027)8736-0547
!"#$ ! !"#$%Unique-A Division of Memec (Asia Pacific) [email protected] !"(852)2410-2778 (852)2370-3247 !"(010)8519-1866 (010)8519-1865 !"(028)620-0026 (028)620-0027 !"(021)6317-8226 (021)6317-3446 !"(0755)8366-4329 (0755)8366-4330 !"(027)8732-2646 (027)8732-2729 !"(0592)516-4701 (0592)516-4702 !"(029)822-9180 (029)825-8595 !"(0532)582-1322 (0532)582-1322
+
VEE
VDD
C8100nF100V
LT4250L
PWRGD
SENSE
C1470nF25V
C215nF100V
C30.1µF100V
C40.1µF100V
C60.1µF100V
C5100µF100V
C7100µF16V
Q1IRF530
R210Ω5%
R31k5%
R8100Ω
R4549k
1%
R56.49k
1%
R610k1%
R10.02Ω
5%
4
OV
3
2
–48V A
–48VRTN
–48V B
UV
5
6
8
7
1
GATE
DRAIN
LUCENTJW050A1-E
VOUT+
SENSE+
TRIM
SENSE–
VOUT–
VIN+ 9
5V
DN290 F02
8
7
6
5
3
1
2
4
ON/OFF
CASE
VIN–
VOUT+
VOUT–
VIN+
CASE
VIN–
1N4003
+
LUCENTFLTR100V10
*
* DIODES INC. SMAT70A
MOC207
R751k5%
MOC207
MOC207
MOC207
FUSESTATUS
SUPPLY ASTATUS
R1147k1/4W
SUPPLY BSTATUS
OUT FVA
3
4
57
2
8
1
6
VB
FUSE A
3A
3A
RTN
LTC1921
FUSE B OUT A
OUT B
R1010k1W
R910k1W
= DIODES INC. B3100
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!"#$%&'(==LTC1921 = !"
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LTC1921 !"#$%&'()=LED
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!"#$%& =LTC1921 ! =LED
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= 2 !"#= LTC1921 = LT®4250 = Hot
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LTC1921 !"#$%&'(J48V
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