16
LT1640L/LT1640H
1640lhfb
LINEAR TECHNOLOGY CORPORATION 1998
LT/TP 1101 1.5K REV B • PRINTED IN USA
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
TYPICAL APPLICATION
U
Using an EMI Filter Module
Many applications place an EMI filter module in the power
path to prevent switching noise of the module from being
injected back onto the power supply. A typical application
using the Lucent FLTR100V10 filter module is shown in
Figure 14. When using a filter, an optoisolator is required
to prevent common mode transients from destroying the
PWRGD and ON/OFF pins.
PART NUMBER DESCRIPTION COMMENTS
LTC
®
1421 Dual Channel, Hot Swap Controller Operates from 3V to 12V
LTC1422 High Side Drive, Hot Swap Controller in SO-8 System Reset Output with Programmable Delay
LT1640A –48V Hot Swap Controller in SO-8 LT1640 Pin Compatible, Improved Drain Pin Ruggedness
LT1641 48V Hot Swap Controller Foldback Analog Current Limit
LTC1642 Fault Protected Hot Swap Controller Operates Up to 16.5V, Protected to 33V
LTC1643 PCI Hot Swap Controller 3.3V, 5V, 12V, –12V Supplies for PCI Bus
LTC1645 Dual Hot Swap Controller Operates from 1.2V to 12V, Power Sequencing
LTC1646 CompactPCI
TM
Hot Swap Controller 3.3V, 5V Supplies, 1V Precharge, Local PCI Reset Logic
LTC1647 Dual Hot Swap Controller Dual ON Pins for Supplies from 3V to 15V
LTC4211 Low Voltage Hot Swap Controller 2.5V to 16.5V, Dual Level Circuit Breaker, Active Inrush Limiting
LT4250 –48V Hot Swap Controller in SO-8 LT1640 Pin Compatible, Active Current Limiting
LTC4251 –48V Hot Swap Controller in SOT-23 Active Current Limiting, Fast Circuit Breaker for Short-Circuit Faults
CompactPCI is a trademark of the PCI Industrial Computer Manufacturers Group
RELATED PARTS
+
V
EE
V
DD
LT1640L
PWRGD
SENSE
C1
150nF
25V
C2
3.3nF
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
18k
5%
R7
51k
5%
R4
562k
1%
R5
9.09k
1%
R6
10k
1%
R1
0.02Ω
5%
4
OV
GND
(SHORT PIN)
GND
3
2
–48V
UV
5
6
8
7
1
GATE
DRAIN
LUCENT
JW050A1-E
V
OUT
+
SENSE
+
TRIM
SENSE
–
V
OUT
–
V
IN
+
9
5V
1640 F14
8
7
6
5
3
1
2
4
ON/OFF
CASE
V
IN
–
V
OUT
+
V
OUT
–
V
IN
+
CASE
V
IN
–
+
LUCENT
FLTR100V10
*
1N4148
1N4003
MOC207
* DIODES INC. SMAT70A
43
21
Figure 14. Typical Application Using a Filter Module
