TPS54519: Datasheet Information Enquiry

CHETHANA RAO

Part Number: TPS54519
Other Parts Discussed in Thread: TPS62867

Hi Team,

Thanks & Regards,

Chethana

0 Chris Glaser over 3 years ago

Hi Chethana,

GMea is 250 uA/V, as stated earlier. R3 sets the compensated EA gain to the inverse of the power stage gain.

In any case, the TPS62867 is a newer, smaller, simpler device to use.

Thanks,

Chris

0 CHETHANA RAO over 3 years ago in reply to Chris Glaser

Hi Chris,

Thank you for the response! But in the equation-36 what is the GPWRSTG and gmEA ?

If we use the above data we won't get the provided R3 value in the datasheet.

Is it possible to explain the calculation?

Thanks & Regards,

Chethana

0 Chris Glaser over 3 years ago in reply to CHETHANA RAO

Hi Chethana,

GPWRSTG is the Gain of the Power Stage, mentioned in the previous paragraph.

gmEA is the gain (or transconductance) of the error amplifier, specified on page 3 and explained/shown on in figure 26 and equation 19.

Equation 36 works for me. Use 0.00025 for gmEA.

Chris

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