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TPS3701: TPS3701

Karl Zillner
Prodigy 10 points
Part Number: TPS3701

Hello,

have a problem with OUTB, overvoltage detection. Vdd and Vmon are the same, schematic is the same like in datasheet figure 22. Voltage limit is set to ~3.6V by the resistors. Between ~3.6 to 3.8V output is oszillating with ~50kHz, at higher voltage it is stable low. How can I avoid this?
OUTA (low voltage detection) works fine and goes straight to low.

Thank you    Karl

  • 0
    TI__Genius 12630 points
    Karl,

    What is the input voltage to V_INB? This pin voltage should be 1.7V max and for V_INA as well with the trip voltage at 0.4V. Also, placing a 0.1uF ceramic capacitor close to Vdd is useful if the supply voltage is unstable. The output should not be oscillating due to the built in hysteresis in this device.

    -Michael