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TL431-Q1: TL431BQDBZRQ1 Capacitor Load Question

Kuo Duke
Expert 2040 points
Part Number: TL431-Q1
Other Parts Discussed in Thread: TL431

Hi Team,

May I know TL431BQDBZRQ1 temp drift error behavior on 85 degree condiction, since customer test TL431BQDBZRQ1 has voltage swing Vpp 400mV in different capacitor load.

Circuit

4nF Capacitance and 400mV swing

1nF Capacitance

  • 0
    TI__Mastermind 19370 points

    HI Kou,

    The TL431 is sensitive with different capacitive loads. This is shown in figure 18 of the datasheet. This is the reason why the customer see the 400mV swing.

    What temperature did your customer notice the instability?

    This app note below also goes into more detail on the stability region.

    -Marcoo