TPS61252 - Does this device have “Pre-bias”?

Hide

Guru 21045 points

Other Parts Discussed in Thread: TPS61252

Hi Team,

Our customer would like to enable the device, when the output voltage is left.

So, we would like to know whether this device has "Pre bias".

If it doesn’t have this function, could you please let me know the recommended output discharge circuit?

[Back ground]

They need large load capacitor(Cload) for the load device.

Therefore, they have to enable the device, when the output voltage is left.

[conditions]

Vin=2.3V to 4.2V

Vout=6.0V

Iout=Around 570mA (peak current)

Cout=22uF

Cload=47uF*2 + 1uF*2 + 0.1uF*2=96.2uF

Regards,

Kanemaru

over 9 years ago

0 Gene Lu over 9 years ago

TI__Intellectual 1305 points

Hi Kanemaru,

It's OK to restart with Vout pre-bias, TPS61252 can work normally.

Gene

0 Hide over 9 years ago in reply to Gene Lu

Guru 21045 points

Hi Gene-san,

Thank you for your prompt reply!

I have one more question.

How did you confirm this information?

Unfortunately, I was not able to find it from datasheet.

Could you please let me know if you have any advice?

Regards,

Kanemaru

0 Gene Lu over 9 years ago in reply to Hide

TI__Intellectual 1305 points

Hi Kanemaru,

Please check the following waveforms, which shows the "Pre-bias" function.

Gene

0 Hide over 9 years ago in reply to Gene Lu

Guru 21045 points

Hi Gene-san,

Thank you always for your kind support!

We will report this information to our customer.

Regards,

Kanemaru

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TPS61252 - Does this device have “Pre-bias”?