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Электронный компонент: LDP24A

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September 2003 - Ed: 6C
1/5
R6
Symbol
Parameter
Value
Unit
V
PP
Peak pulse load dump overvoltage
See note 1
T
amb
= 85C
100
V
P
Power dissipation on infinite heatsink
T
amb
= 100C
5
W
I
FSM
Non repetitive surge peak forward current.
T
j
initial = 25C
tp = 10 ms
500
A
T
stg
Storage temperature range.
- 65 to + 175
C
T
j
Maximum operating temperature
175
C
T
L
Maximum lead temperature for soldering
during 10 sec at 4 mm from case.
230
C
ABSOLUTE RATINGS (limiting values)
DESCRIPTION
Transient voltage suppressor diodes especially
useful in protecting integrated circuits, MOS, hy-
brids and other overvoltages sensitive semicon-
ductors and components.
n
TRANSIENT VOLTAGE SUPPRESSOR
DIODE ESPECIALLY DESIGNED FOR
LOAD DUMP PROTECTION
n
COMPLIANT WITH MAIN STANDARDS
SUCH AS:
ISO / DTR 7637
FEATURES
Symbol
Parameter
Value
Unit
R
th
(j-a)
Junction ambient thermal resistance on infinite heatsink
L
lead
= 10 mm
15
C/W
THERMAL RESISTANCES
Note 1: For surges greater than the maximum values, the diode will present a short-circuit Anode - Cathode.
LDP24A
LOAD DUMP
TRANSIENT PROTECTION
LDP24A
2/5
I
I F
V F
V
VCL
VBR
VRM
I PP
I RM
V
Symbol
Parameter
V
RM
Stand-off voltage.
V
BR
Breakdown voltage.
V
CL
Clamping voltage.
I
PP
Peak pulse current.
T
Temperature coefficient of V
BR
.
C
Capacitance
I
RM
Leakage current at V
RM
V
F
Peak forward voltage drop
ELECTRICAL CHARACTERISTICS
Symbol
Test Conditions
Min.
Typ.
Max.
Unit
Ipp
Pulse duration: 300ms
30
A
I
RM
T
j
= 25C
T
j
= 85C
V
RM
= 24 V
V
RM
= 24 V
50
300
A
A
V
BR
T
L
= 25C
I
R
= 1mA
25
32
V
V
CL
T
L
= 85C
see table1
40
V
T
10
10
-4
/C
C
F = 1MHz
V
R
= 0V
8000
pF
V
F
I
FM
= 10A
0.9
V
LOAD DUMP TEST GENERATOR CIRCUIT (SCHAFFNER NSG 506 C). Issued from ISO / DTR 7637.
Impulse
N5
Vs (V)
86.5
Vbat (V)
13.5
Ri (
)
2
t (ms)
200 (*)
tr (ms)
<10
Number
5
60s between each pulse
(*) Generator setting
Table 1
U(V)
t
0
Vbat
90%
Vs
10%
t
t r
offset
10% / 13.5V
Open circuit (voltage curve)
(Pulse test n5)
LDP24A
3/5
1
2
5
10
20
50
100
0.1
0.2
0.5
1.0
2.0
5.0
10.0
tp(ms)
Ppp(kW)
Fig. 1: Peak pulse power versus exponential pulse
duration (Tj initial=85C).
1
2
5
10
20
50
100
10
20
50
100
200
tp(ms)
Ipp(A)
Fig. 2 : Peak pulse current versus exponential
pulse duration (Tj initial=85C).
0
25
50
75
100
125
150
175
200
0.0
0.2
0.4
0.6
0.8
1.0
1.2
Tj (C)
Ppp[Tj] / Ppp [Tj initial=85C]
Fig. 3: Relative variation of peak pulse power versus
junction temperature.
0
25
50
75
100
125
150
175
0
1
2
3
4
5
6
Tamb(C)
P(W)
Rth(j-a)=Rth(j-l)
Rth(j-a)=50C/W
Fig. 4: Continous power dissipation versus ambient
temperature.
1E-2
1E-1
1E+0
1E+1
1E+2
1E+3
0.1
1.0
10.0
100.0
tp(s)
Zth(j-a)(C/W)
Lleads=10mm
Fig. 5: Variation of thermal impedance junction to
ambient versus pulse duration (printed circuit
board FR4, e(Cu)=35
m, SCu=1cm
2
).
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
1
10
100
200
VFM(V)
IFM(A)
Tj=125C
Tj=25C
Fig. 6 : Peak forward voltage drop versus peak
forward current (typical values).
LDP24A
4/5
1
2
5
10
20
50
1
2
5
10
VR(V)
C(nF)
F=1MHz
Vosc=30mV
Fig. 8: Junction capacitance versus reverse applied
voltage.
10
20
50
100
100
200
500
1000
2000
5000
tp(ms)
IFSM(A) , It(As)
Tj initial=25C
IFSM
It
Fig. 7: Non repetitive surge peak forward current
versus sinusoidal pulse duration and correspond-
ing value of I
2
t.
LDP 24 A
Load Dump Protection
Stand Off Voltage
AG Case
ORDER CODE
LDP24A
5/5
PACKAGE MECHANICAL DATA
R6 (Plastic)
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of
use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by
implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to
change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not au-
thorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
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All other names are the property of their respective owners.
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Type
Marking
Package
Weight
Base qty
Delivery mode
LDP24A
LDP24A
R6
2.048 g
100
Ammopack
LDP24ARL
LDP24A
R6
2.048 g
1000
Tape & Reel
n
Resin meets UL94-V0
REF.
DIMENSIONS
Millimeters
Inches
Min.
Typ.
Max.
Min.
Typ.
Max.
A
8.6
9.1
0.338
0.358
B
25.4
1
C
8.6
9.1
0.338
0.358
D
1.2
1.3
0.047
0.051
B
D
C
A
B