UC1903: Unused PIN

user5163865

Part Number: UC1903

Hi,

If I don't use SENSE 4 INVERT INPUT, what is the proper way to handle this pin?
Please note that a signal will be connected to "SENSE 4 INPUT", so we are considering a processing method that will not affect it.

Best regards,
Hiroshi

9 months ago

0 Walter Zollinger 9 months ago

TI__Expert 7610 points

Hello Hiroshi-san,

The sense 4 invert input can be left unconnected if it is not used.

Best,

Walter

0 user5163865 9 months ago in reply to Walter Zollinger

Genius 3600 points

Hi Walter-san,

Sorry. I have additional questions from our customer.

Since LINE/SWITCHER SENSE INPUT will not be used, it will be fixed at Vcc (=13V).
・Do you recommend connecting directly to Vcc or pull up?
・What is the input current of this pin?

Thank you for your support.

Hiroshi

0 Walter Zollinger 9 months ago in reply to user5163865

TI__Expert 7610 points

Hello Hiroshi-san,

The pin can be either directly connected or pulled up.

The input current for the pin is 1uA typ.

Thanks,

Walter

0 user5163865 9 months ago in reply to Walter Zollinger

Genius 3600 points

Walter-san,

Thank you for your support.

Best regards,
Hiroshi

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UC1903: Unused PIN