NHD-C0216CZ-NSW-BBW-3V3 Boost Circuit

AmericanMeter

• September 12, 2018 08:07

Hi,

I have made 40 boards with NHD-C0216CZ-NSW-BBW-3V3.   On about 8 of them the boost circuit is not running for the LCD and therefore nothing is being displayed on the display.   The board is designed for 3.0V operation.   

Voltage rise time is 540uS to go from 0.3V to 2.7V.

Tried setting the Software setting to different settings, but can't get displays to start.  Same software works fine for the other 32 units.

Checked VDD, an GND and they are present on pins.
Display is not in Reset (pin is high).

Any suggestions?
Thanks.

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• 

  Ted M.

  NHD Staff

  • September 13, 2018 08:07

  What value are the capacitors connected to pins 8,9, and 10?
  
  Regards,
  
  Ted

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  AmericanMeter

  • September 14, 2018 08:07

  I am using 1uF caps for both.
  
  1uF 10V Ceramics X5R capacitor.
  
  Regards,
  Craig

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