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LM74720-Q1: Automotive transient protection ICs -ISO-16750 /ISO-7367

Aria1004
Prodigy 60 points
Part Number: LM74720-Q1
Other Parts Discussed in Thread: LM7480, LM74800-Q1, LM7480-Q1

Hi,

I already tried comparing the following devices  LM74720-Q1 , LM7480*, LM7470*  through the online tool.

Is my understanding correct that between LM74720 and LM7480 the only difference is the prior has low Iq

Functionally both are the same? and provides protections against load dump/surge/overvoltage/ reverse battery protection ?

LM74720 being a newer product --is it the recommended one?

Thanks,

  • 0
    TI__Guru 57737 points

    Hi Aria,

    You are right! Functionally both LM74720-Q1 and LM74800-Q1 are the same. The major difference between then is the low Iq offered by LM74720-Q1.

    LM74720-Q1 has integrated boost converter based Gate drive topology (when compared to traditional charge pump based in that of LM7480-Q1) which enables lower Iq and higher gate drive strength. Yes, there should be no problem using LM74720-Q1. 

    Feature

    LM74720-Q1 

    LM74800-Q1

    VIN (Vs) Range

    3V-65V (70V abs max)

    3V-65V (70V abs max)

    Iq(on)

    27µA

    396µA

    VIN (reverse)

    -65V

    -65V

    FET Driving topology

    Single FET (Ideal Diode only) and Back to Back FET driving

    Single FET (Ideal Diode only) and Back to Back FET driving

    Adjustable Over voltage protection

    Yes

    Yes

    Charge Pump capacity

    29mA (Boost regulator based)

    3.8mA

    Reverse current protection  time

    0.45µs

    0.5µs

    Forward Ton time during AC rectification

    1.9µs

    2.8µs

    Package

    WSON 3mmx3mm 12 pin

    WSON 3mmx3mm 12 pin