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Original question:

LMR16006: LMR16006YDDC SHDN

LMR16006: Over Current Protection

James VDC
Prodigy 240 points
Part Number: LMR16006
Hi Katelyn, Another LMR16006 question. With respect to over current or short circuit at the output, am I correct in my understanding the at the device will likely enter shutdown due to temperature increase at that point? And that is the protection? If so, how long can the device stay in that condition before it is damaged? If not, what is the built in protection and how does it function? Thanks!
  • 0
    TI__Mastermind 23845 points

    Hi James,

    Yes the part will have a cycle by cycle current limit therefore it will limit the peak current during an overload or short condition. Each cycle the switch current and internal COMP voltage are compared, when the peak switch current intersects the COMP voltage, the high side switch is turned off. During overcurrent conditions that pull the output voltage low, the error amplifier will respond by driving the COMP node high, increasing the switch current. The error amplifier output is clamped internally, which functions as a switch current limit.

    If the IC heats up during this cycle by cycle current limit, then the thermal shutdown will kicks in and shut off the operation of the IC until the junction temperature cools down to typical 160 degree C then it try to restart again. 

    Thanks

    -Arief