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INA1650: Static power consumption and temperature

Part Number: INA1650

Im making a PCB to process signals where I use the INA1650, but when on standby (static) with the pcb pluged in the INA1650 gets hot and draws a considerable amount of power. I cant seem to find the issue, i dont see any shortcircuits or visible damage on the pcb. Why would it get hot when on standby?

  • Hi Ignacio,

    What is the current draw from your power supplies? Are your supplies going into current limit?

    Can you probe the voltages at the INA1650 power supply pins?

    It is possible that during assembly, a solder bridge was developed that is providing a short circuit to your power supply pins. Are there any other components on your board that are heating up? It may help to remove the INA and decoupling capacitors from your board, inspect for solder bridges, and then replace the components. Often the act of removing the component will also remove the solder bridge.

    You may also consider giving your PCB a thorough cleaning using isopropyl alcohol or flux remover. If the board was not cleaned after assembly, it is possible that residual solder flux is providing the low-impedance short to the power supplies.

    Regards,

    Zach