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LM27313-Q1: Some questions about Flyback design for positive and negative output by LM27313-Q1

chao yang
Expert 1620 points
Part Number: LM27313-Q1
Other Parts Discussed in Thread: PMP10703, LM2733

Hello all

I want to design power supply for gate driver IC of IGBT module (Three phase bridge).

So I want to use LM27313-Q1 to design flyback convertor which can output 15V(250mA) and -9V(250mA).

This is the circuit topology I designed:(I'm going to design six same power supplies for gate driver ICs due to functional safety)

Q1: Is this power topology designed to be reasonable?

Q2:Is 250mA current output capability enough for this gate driver IC：1EDI2010AS?

Q3:Is there anything else I need to pay attention to?

Q4:Does TI have any better design topologies than my design?Such as more appropriate chips(automobile grade) of TI or more appropriate topology for this ?

Thank you 

  • 0
    TI__Intellectual 2655 points
    Hi yang
    A1 it is reasonable
    A2 will you use the 15V and -9V to drive the MOS? it depends on the MOS Qg.
    A3 because the compensation is inside except C9, you should pay attention to the stability.
    A4 we have a similar reference design you can refer it.
    9V to 14Vin, Isolated +/- 15V/100mA Output Flyback Reference Design Solution with LM2733 (ACTIVE) PMP10703