MSP430F6779A: LCD charge pump 3.3 V to 3.6 V

Nattapol Khamsa-ing

Prodigy 180 points

Part Number: MSP430F6779A

Refer to MSP430F6779A's data sheet (SLAS982A) as below figure.

What if LCD is charged up from 3.3 V to 3.6 V. Which values in this table will be changed?

How much is it changed?

And how to calculate changed values?

over 4 years ago

0 Dennis Lehman over 4 years ago

TI__Guru 60131 points

Hello Nattapol,

Let me look into this to get you a definitive answer.

0 Dennis Lehman over 4 years ago in reply to Dennis Lehman

TI__Guru 60131 points

Hello Nattapol,

There is no data for that configuration.

What is the VCC you are using for this device?

0 Nattapol Khamsa-ing over 4 years ago in reply to Dennis Lehman

Prodigy 180 points

Hi Dennis Lehman,

We use 3.3 Vcc power supply when AC power is normal and 3.3 V backup battery when power failed. Or do you have other suggestion for using 3.3 Vcc with LCD charge pump?

Thank you,

Nattapol

0 Dennis Lehman over 4 years ago in reply to Nattapol Khamsa-ing

TI__Guru 60131 points

Hi Nattapol,

Probably the Icp (load) current. It has a min of 50uA but no typ or max so I assume it could be vary, depending on the LCDCPEN and VLCDx selections.

0 Dennis Lehman over 4 years ago in reply to Dennis Lehman

TI__Guru 60131 points

Hi Nattapol,

I was checking to see if you had any additional questions regarding the LCD module.

I'm assuming you have the answers you need, so I will mark this issue resolved.
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MSP430F6779A: LCD charge pump 3.3 V to 3.6 V