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LP8556: VBOOST problem

Part Number: LP8556

Hi Team

I am using LP8856TMX-E05 for our 13.3" LCM backlight driver.

Now,I meet a strange issue about Vboost.

When power on our device, the backlight was work well.

Then power off the device and power on again, backlight was not work.

In this situation,the register 0x02=0x20h.It indicate the VBOOST don't reach target.

It must be waiting for >30 senond after power off, then power on,the backlight will work well again.

Please help to solved this issue.

Thanks,

Edgar