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lmz23610 ISO-16750-2

aud_str
Prodigy 125 points
Other Parts Discussed in Thread: LMZ23610, LMZ13610

 Hi, I intend to use the  LMZ13610 or LMZ23610 in a 24 V vehicle and I need to have my product compliant with ISO-16750-2[24 V system]. So I m looking for a low cost solution that allows the power supply to handle the load dump pulse from iso-16750-2 test.

Do anyone have any suggestion?

regards,

Bruno

  • 0
    TI__Guru 57555 points

    The LMZ23610 has a max operating voltage of 36V and an abs max of 40V.  If the load dump voltage is less than 36V, then the device can tolerate that.  The ISO spec seems to say 34V ???  As always negative voltages can not be tolerated.

    However, there may be other reasons why the device may not regulate at such a high input voltage; such as too much load and/or power dissipation.

    FD

  • 0 in reply to Frank De Stasi
    Prodigy 125 points

    Thanks, however please take a look here : http://edn.com/design/automotive/4428059/Load-dump-protection--Old-vs--new-ISO-standards

    Table 1  Pulse requirements for ISO-16750-2

    Parameter

    Type of system

    Minimum

    test requirements

    UA = 12 V

    UA = 24 V

    Us  (V)

    79  to 101

    151  to  202

    10 pulses

    at intervals of 1 min.

    Ri  (Ohm)

    0.5  to  4

    1  to  8

    td  (ms)

    40   to  400

    100   to  350

    tr  (ms)

    10 / +0 / -5

    10 / +0 / -5

     How can we handle that ?

    thanks

  • 0 in reply to aud_str
    TI__Guru 57555 points

    Since these transients are beyond the ratings of this device you will have to devise your own protection scheme, such as a Zener clamp, etc.

    FD