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About efficiency graph of TPS53319

Satoshi
Guru 19645 points
Other Parts Discussed in Thread: TPS53319

TPS53319 efficiency graph are different in datasheet and TPS53319EVM User's manual(Figure 4).

Please let me know about board condition of datasheet figure 20(or 21).

【Additional information】

・Vin：12V, Vout：1.5V, Io：4A, fsw：500kHz

　⇒Datasheet：about 92%, User's manual：90%

・Customer want to judge 2% differ is reasonable or bad board design.

・Customer's end application is their important customer.

  Customer is need to confirm detailed efficiency spec.

Best regards,

Satoshi

  • 0
    TI__Guru**** 191445 points

    The datasheet records efficiency for quite a few different operating conditions. They were probably generated using several different system evaluation boards. The EVM efficiency is specifically for the EVM design. There may be some variation based on different equipment, different circuit boards, different schematics, etc. Typically we consider 4% difference acceptable.  If the customer needs detailed confirmation, they could use an EVM modified to their condition to verify efficiency.