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Paul Ghobril
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On a power supply board for an X-ray sensor (PAN Sirona) we are getting -9v from an LM137 fed by an LM2672 generating -12V from +5V. The circuit is likely like that (it is not easy to make sure it is exactly like this since it is a multilayer board):

-12V from +5Venter image description here

Is there an application note that specify the usage of LM2672 to get a negative voltage since the datasheet doesn't mention this kind of usage?

On a power supply board for an X-ray sensor (PAN Sirona) we are getting -9v from an LM137 fed by an LM2672 generating -12V from +5V. The circuit is likely like that (it is not easy to make sure it is exactly like this since it is a multilayer board):

-12V from +5V

Is there an application note that specify the usage of LM2672 to get a negative voltage since the datasheet doesn't mention this kind of usage?

On a power supply board for an X-ray sensor (PAN Sirona) we are getting -9v from an LM137 fed by an LM2672 generating -12V from +5V. The circuit is likely like that (it is not easy to make sure it is exactly like this since it is a multilayer board):

enter image description here

Is there an application note that specify the usage of LM2672 to get a negative voltage since the datasheet doesn't mention this kind of usage?

Source Link
Paul Ghobril
  • 2.9k
  • 1
  • 10
  • 18

Getting negative voltage from an LM2672

On a power supply board for an X-ray sensor (PAN Sirona) we are getting -9v from an LM137 fed by an LM2672 generating -12V from +5V. The circuit is likely like that (it is not easy to make sure it is exactly like this since it is a multilayer board):

-12V from +5V

Is there an application note that specify the usage of LM2672 to get a negative voltage since the datasheet doesn't mention this kind of usage?