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TPS65130: High output current upon introduction of DC-DC boost converter to supply two Op-Amp EVM's

Part Number: TPS65130

We are trying to use the TPS65130 to provide +/- supply to two Op-Amps which are being used to drive two transducers which operate at 2MHz. Our current issue is that when running these amplifiers with a bench top DC supply we operate with around 300mA (~150mA per Amplifier), but when we try supplying from the TPS65130 the current climbs to 1.5 A (Current seen by bench top supply).

The signal going into the TPS65130 and the Op-Amps is a 3.3V 2MHz signal from an MSP430 EVM board, which will be using a battery supply.

  • Hi,

    I have notified our expert regarding this topic. Please expect a response by 3/13/19.

  • Hello,

    I am not sure what you mean by signal going into TPS65130 is "3.3V 2MHz"? TPS65130 expects a DC voltage in the range of 2.7V-5.5V for its input supply.
    TPS65130 is a boost and an inverting converter . There will be some loss due to power conversion and this loss will depend on input supply voltage magnitude to TPS65130 and output voltages magnitude at its VPOS and VNEG rails as well as load current magnitude. Input current of 1.5A sounds excessive. Please check your TPS65130 circuit schematics against the reference schematics in the datasheet and ensure that properly calculated component values are used for your application.

    Kind Regards,