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LTC2913 Fiches technique(PDF) 18 Page - Linear Technology

No de pièce LTC2913
Description  High Voltage Surge
PDF  24 Pages
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Fabricant  LINER [Linear Technology]
Site Internet  http://www.linear.com
Logo LINER - Linear Technology

LTC2913 Fiches technique(HTML) 18 Page - Linear Technology

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LT4363
18
4363fa
TYPICAL APPLICATIONS
Overvoltage Regulator with Output Keep Alive During Shutdown
CTMR
0.1µF
RSNS
10m
Q1
IRLR2908
VIN
VOUT
12V, 4A
REGULATED
AT 16V
4363 TA02
LT4363DE-2
GND TMR
9
12
OUT
2
SNS
3
FB
1
D1*
SMAJ58A
R2
24.9k
R1
287k
R7
1k
GATE
4
VCC
5
R3
10
R9
1k, 1W
*DIODES INC.
**SANYO 25CE22GA
SHDN
6
UV
8
OV
7
FLT
ENOUT
10
11
CL**
22µF
R5
30.1k
R6
10k
R4
147k
D2
1N4746A
18V
1W
UV = 6V
OV = 24V
C1
47nF
APPLICATIONS INFORMATION
The power dissipation in Q1 is:
P
=
14V • 25mV
10m
Ω
= 35W
During an output overload or soft short, the voltage at the
OUT pin could stay at 2V or higher. The total overcurrent
fault time when VOUT = 2V is:
tOC =
47nF • 0.875V
40µA
= 1.028ms
The power dissipation in Q1 is:
P
=
14V – 2V
(
)•50mV
10m
Ω
= 60W
These conditions are well within the Safe Operating Area
of the FDB33N25.



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