LT1640AH_15 Datasheet, PDF (16/16 Pages) Linear Technology – Negative Voltage Hot Swap Controller

LT1640AL/LT1640AH
TYPICAL APPLICATION
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.
(SHORT PIN)
GND
GND
R4
562k
1%
R5
9.09k
1%
8
1
V_DD
3
UV
PWRGD
7
DRAIN
LT1640AL
2
OV
6
GATE
R6
10k
V_EE
SENSE
1%
4
5
*
– 48V
R1
0.02Ω
3
5%
4
1
2
* DIODES INC. SMAT70A
C2
3.3nF
100V _R3
18k
5%
C1
R2
150nF 10Ω
25V
5%
Q1
IRF530
R7
51k
5%
4N25
C3
0.1µF
100V
V_IN+ V_OUT+
LUCENT
FLTR100V10
V_IN– V_OUT–
CASE
C4 +
0.1µF
100V
C5
100µF
100V
Figure 14. Typical Application Using a Filter Module
LUCENT
JW050A1-E
1 _VIN+
2
V_OUT+
SENSE ⁺
9
8
7
+
ON/OFF TRIM
C6
0.1µF
100V
4 _VIN–
6
SENSE ^–
V_OUT– ⁵
CASE
3
1640A F14
5V
C7
100µF
16V
RELATED PARTS
PART NUMBER
DESCRIPTION
LTC^®1421
Dual Channel, Hot Swap Controller
LTC1422
Hot Swap Controller in SO-8
LT1641
Positive 48V Hot Swap Controller in SO-8
LTC1642
Fault Protected Hot Swap Controller
LTC1643
PCI Hot Swap Controller
LTC1645
Dual Hot Swap Controller
LTC1646
CompactPCI^TM Hot Swap Controller
LTC1647
Dual Hot Swap Controller
CompactPCI is a trademark of the PCI Industrial Computer Manufacturers Group
COMMENTS
Operates from 3V to 12V
System Reset Output with Programmable Delay, 3V to 12V
Foldback Analog Current Limit
Operates Up to 16.5V, Protected to 33V
3.3V, 5V, 12V, – 12V Supplies for PCI Bus
Operates from 1.2V to 12V, Power Sequencing
3.3V, 5V Supplies, 1V Precharge, Local PCI Reset Logic
Dual ON Pins for Supplies from 3V to 15V
16 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^q FAX:[phone] ^q www.linear-tech.com
1640alahf LT/TP 0501 4K • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2001