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Need +-18V 60mA each four times three times isolated

Gerhard Kreuzer
Expert 2600 points
Other Parts Discussed in Thread: LM25019

Hi,

 

I Need two +-18V supplies, one totally isolated one not. Found the LM25019, cheap chip, but sample Shows only 10V Output. The selection page give me that choice according my Input for +-18V.

 

Is this a bug of the selection page or is this chip able to do the Job.

 

With best regards

 

Gerhard

  • 0
    TI__Genius 13700 points

    Hello Gerhard,

    The eval board is configured for 10V out but the device is capable of supporting output voltages up to 40V. The internal FETs are rated for 48 volts so operating with an +18V output assuming the input voltage is greater than +18V and the feedback is configured to track to 18V the chip will work fine.

    Since the feedback voltage is compared to 1.225V the feedback resistive divider must constructed according to have +18V produce an equivalent voltage.

    What is your input supply and how do you intend on producing the -18V?

    Ryan May