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LM5121: recommended boost

Adrian Ymeraj
Expert 3810 points
Part Number: LM5121
Other Parts Discussed in Thread: LM5122

Hello team,

for a new project I'm looking for a boost powered by a battery, specs are Vin=14V, Vout=24V P=90W and I noticed the LM5121 and the 5122 without disconnection switch. Would there be a multi-phase controller (I would like to make my converter with 2 phases) that also manages synchronous rectification (therefore with integrated boostrap)?
Even one without synchronous rectification could work for me.
I would prefer to have a controller with integrated peak current mode.

Please let me know what your suggestions are.

Thanks and best regards,

Adrian

  • 0
    TI__Mastermind 31315 points

    Hi Adrian,

    The 5122 is a synchronous controller and can implement dual-phase interleaved boost. It also utilizes peak current mode control. Please see section 8.1.3 of LM5122 datasheet for interleaved operation.

    This reference design (http://www.ti.com/tool/PMP9309) may be a starting point for your application. Keep in mind that you do not need to have the op-amp circuit as noted in the design.

    Thanks,

    Richard