TPS65150: TPS65150

Shafeeq Muhammed

Part Number: TPS65150

Hi,

We are using TPS65150 in our design. As per the datasheet section 7.3.5, VCOM will start once Vcpi reaches its final value.
We want sequencing as VCOM starts once VGH is reached its final value.

With default option, VCOM is rising before VGH reaches its final value.
Attached the capture for your reference.

Please suggest if there are any option to give more delay for VCOM

Thanks & Regards,

over 3 years ago

0 Liaqat Khan over 3 years ago

TI__Mastermind 18550 points

Hello Shafiq,

What is the status of CTRL pin in your design? The reason I ask is that with CTRL connected to Vin, VGH should rise almost at the same time as VCPI and VCOM should start rising up after that as shown in the picture below from the datasheet.

Kind Regards,

Liaqat

0 Shafeeq Muhammed over 3 years ago in reply to Liaqat Khan

Expert 1180 points

Dear Liaqat,

Thanks for the reply.
The CTRL is connected to VIN.

But Vcom is rising before VGH.

Best regards,
Shafeeq

0 Liaqat Khan over 3 years ago in reply to Shafeeq Muhammed

TI__Mastermind 18550 points

Hi Shafeeq,

If CTRL is connected to Vin, that means application is not using gate pulse modulation. In that case I suggest to use VCPI for VGH supply of you LCD display. VCPI is fully regulated output and is suitable to drive VGH input of the display.

Kind Regards,

Liaqat

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TPS65150: TPS65150