900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




Vishay Intertechnology Electronic Components Datasheet

EPICxxxxxxxx Datasheet

Electro-Pyrotechnic Initiator Chip Resistor

No Preview Available !

EPIC
Vishay Sfernice
www.DataSheet4U.com
Electro-Pyrotechnic Initiator Chip Resistor
Electro-pyrotechnic initiator resistors, also known as bridge
resistors, are resistive elements, which convert electrical
energy into heat energy in a precise electro-thermal profile
for the purpose of initiating a series of pyrotechnic events in
a controlled energetic reaction. In automotive applications
this effect is used to deploy automotive airbags and other
safety devices. These same devices are also used in military
applications for pilot ejection systems, explosive bolt
disengagement of airbone missiles, chaff dispensers,
artillery projectile activators, anti-tank mines, etc.
Commercially, they are used in mining and de-constructions
applications.
PRINCIPLE OF OPERATION
The two main parameters of an EPIC are “no fire” and “all
fire” conditions.
“No fire” represents the immunity of the resistor to the
environmental electro-magnetic pollution and electric
continuity test: Therefore customer will have to provide
Vishay/Sfernice with “no firing” conditions: Maximum current
DIMENSIONS in millimeters (inches)
B
FEATURES
Vishay has developed a special thin film resistor
chip specifically designed to provide pyrotechnic
engineers with a lot of advantages
Firing energy down to 50 µJ
Pb-free
Available
RoHS*
COMPLIANT
Firing time down to 50 µs
Ohmic range: 2R to 10R
Compatibility with various pyrotechnic composition even
with no primer
Joule effect ignition or flash ignition for very fast firing
Easy set up by design of firing levels
“No fire”/“all fire” ratio up to 70 %
Very predictable, reproducible and reliable behaviour
Size: 0603 preferred - other size available upon request
and longest duration when part should not ignite the
explosive powder.
“All fire” represents the command pulse. Customer will have
to provide Vishay/Sfernice with “all firing” conditions:
Minimum current, duration necessary to ignite the explosive
powder.
A
C
CASE
SIZE
0603
A
MAX. TOL. + 0.152 (0.006)
MIN. TOL. - 0.152 (0.006)
1.52 (0.060)
DIMENSION
B
MAX. TOL. + 0.127 (0.005)
MIN. TOL. - 0.127 (0.005)
0.75 (0.030)
C
MAX. TOL. + 0.127 (0.005)
MIN. TOL. - 0.127 (0.005)
0.5 (0.020)
MECHANICAL SPECIFICATIONS
Substrate: Special alumina based substrate
Resistive element: Fine line patterned Tantalum nitride thin
film layer
Diffusion and conductive thin film layers
Terminations: Wraparound over nickel barrier
TECHNOLOGY
This technology contributes to the stability of the heating element, the precise electro-thermal response profile and the ability to
design a precise activation energy.
All these features are perfectly controlled on high production volumes.
* Pb containing terminations are not RoHS compliant, exemptions may apply
www.vishay.com
74
For technical questions, contact: sfer@vishay.com
Document Number: 53041
Revision: 03-Nov-08


Vishay Intertechnology Electronic Components Datasheet

EPICxxxxxxxx Datasheet

Electro-Pyrotechnic Initiator Chip Resistor

No Preview Available !

Electro-Pyrotechnic Initiator Chip Resistor
EPICwww.DataSheet4U.com
Vishay Sfernice
EXAMPLE OF APPLICATION
Chip: 0603
R: 2R ± 0R2
Energy: Around 1.5 mJ
Response time: 0.2 ms
Mounting Recommendations
EPIC can be mounted either on a PCB or on a squib. Please refer to Application Note (http://www.vishay.com//doc?53044) to
see Vishay/Sfernice recommendations.
AIRBAGS INITIATORS
A prerequisite to valid reliability estimation of an electro-explosive device (EED) is a sensitivity test program carefully chosen and
properly perform. The Bruceton Method (or up and down method) of sensitivity testing was developed specifically for ordinance
testing. Here under is an example of Bruceton’s test results.
2 customers: Customer A and customer B have equipped squibs of their own with 3 variants (Variant 1, 2 and 3) . Bruceton’s test
results of Vishay heating elements are shown in Table 1
HEATING ELEMENT
Variant 1
Variant 2
Variant 3
CUSTOMER A
NF (in mA)
AF (in mA)
546 766
571 839
619 891
CUSTOMER B
NF (in mA)
AF (in mA)
538 776
577 859
612 875
CONCLUSION
Bruceton test results are self explanatory. They show that the electro-thermal behavior of EPIC is predictable, precise and
reproducible.
For more information please read the Application Note (http://www.vishay.com/doc?53044).
HOW TO GET THE RIGHT EPIC
Each EPIC will have to be adapted to customer pyrotechnic element. To reach the right product, Vishay/Sfernice works by
“iteration”. Upon receipt of the EPIC Design Guide (http://www.vishay.com/doc?53045) duly filled, an initial sampling lot is given
to customer (along with an EPIC reference) so he can provide Vishay/Sfernice with “no firing”/“all firing” conditions.
Then Vishay/Sfernice will be able to provide a new set of samples (eventually tooling charges will be necessary). Ohmic value of
samples will remain the same, but there will be a new compromise between the length, the width and the thickness of the filament
so as to increase the sensitivity of the EPIC and adapt the firing conditions to the pyrotechnic element of the customer.
When the right parameters are reached Vishay/Sfernice will design a final set of mask (with the participation of the customer).
ORDERING PROCEDURE
New Global Part Numbering: EPICxxxxNT
EP I Cx x x xNT
MODEL
EPIC
xxxx
Will be determined
at time of design
TERMINATION (1)
N: Tin/silver
B: Tin/lead
G: Gold
PACKAGING
W = Waffle pack
T = Tape and reel
Notes
(1) Tin/lead: Please consult
• EPIC being a semi-custom product, please fill EPIC Design Guide (http://www.vishay.com/doc?53045) and send to
sfer@vishay.com to get appropriate part number.
• Per Vishay policy all the components designed for automotive applications should be tested in accordance to AEC Q200
specification. As the EPIC is just part of an ignitor which is designed and qualified by each customer Vishay is not proceeding
to any AEC Q200 test.
Document Number: 53041
Revision: 03-Nov-08
For technical questions, contact: sfer@vishay.com
www.vishay.com
75


Part Number EPICxxxxxxxx
Description Electro-Pyrotechnic Initiator Chip Resistor
Maker Vishay Siliconix
Total Page 3 Pages
PDF Download

EPICxxxxxxxx Datasheet PDF

View PDF for Mobile








Similar Datasheet

1 EPICxxxxxxxx Electro-Pyrotechnic Initiator Chip Resistor
Vishay Siliconix





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy