• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 77 subscribers
  • Views 347 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Possible LCD_A defect

Joerg Huebler
Prodigy 20 points

Hello,

in the MSP430x4xx Family user's guide chapter " LCD_A Controller" is written

"A 4.7 μF or larger capacitor must be connected from pin LCDCAP to ground
when the internal charge pump is enabled. Otherwise, damage can occur."

Does anybody know which specific effects this damage would have ?

Kind regards from Chemnitz !

  • 0
    Guru 117855 points

    Strictly a "swag" (have made no effort to read/review data) - 4uF7 is pretty large C value - when absent the charge pump may produce a voltage spike beyond the device rating - and that spike may injure the charge pump and any other device interconnected.  

    May also prove true that the cap is also required for loop stability - and charge pump may "run amuck" when absent.

**Attention** This is a public forum