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TI Home » TI E2E Community » Support Forums » Other Analog & Touch » /etc... Analog » /etc... Analog Forum » LM2917M - Pin out
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LM2917M - Pin out

This question is answered
Donald Jones
Posted by Donald Jones
on Mar 08 2012 18:40 PM
Expert6875 points

Please provide Pin-out information (pin name and function) for LM2917M (i.e. the 14-pin version)

LM2917
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  • Donald Jones
    Posted by Donald Jones
    on Mar 08 2012 18:47 PM
    Verified Answer
    Verified by Donald Jones
    Expert6875 points

    For LM2917 14-Pin packages only 

    1

    Input Signal (+), the non-inverting input of the input signal voltage comparator

    2

    Charge Pump Timing, a timing capacitor is charged and discharged at a duty cycle and rate determined by the input signal with the average current value determined by the timing capacitor value

    3

    Charge Pump Output, the average amount of current pumped into, or out of, the timing capacitor is mirrored to the charge pump output load resistor which converts the current into a DC voltage which is integrated (filtered) by a  parallel capacitor.

    4

    Op Amp Input (+), the op-amp is used to scale the Charge Pump Output voltage

    5

    Output Transistor Emitter (Current Source), driven by the op-amp output and used to source high current levels to an external load

    6

    No internal connection

    7

    No internal connection

    8

    Output Transistor Collector (Current Sink), driven by the op-amp output and used to sink high current levels from an external load

    9

    V+, Input Supply, internal zener voltage clamp requires external series current limiting resistor

    10

    Op Amp Input (-), the op-amp is used to scale the Charge Pump Output voltage

    11

    Input Signal (-), the inverting input of the input signal voltage comparator

    12

    Ground

    13

    No internal connection

    14

    No internal connection

     

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