TMS320F28076: f28076 four-switch non-inverting buck–boost

jaures Hsieh

Prodigy 245 points

Part Number: TMS320F28076
Other Parts Discussed in Thread: LM5177

Tool/software:

hi sir

i want to use the cla(dsp) to doing the fourswitch
non-inverting buck–boost:

and i don't know how to calculate the CCM and DCM

and i want to doing like lm5177 phase shift mode,

calculate ccm vin 12.5v;vout=12v;L=10UH,FS=100KHZ

buck duty 0.7347 ;boost duty=0.2347 ;

USE PLECS simulator was correct.

but which DCM IO?

which DCM buck duty ?boost duty?

mean DBM

could you have reference data for me calculate?

we use mathcad

IET Power Electronics - 2020 - Zhang - Advanced four‐mode‐modulation‐based four‐switch non‐inverting buck boost converter_p6_dcm.pdf

over 1 year ago

0 Gus Martinez over 1 year ago

TI__Mastermind 29521 points

Hello,

We don't have this data to provide to you. However, there is a buck-boost reference design which you may want to use as a starting point for your firmware development:

https://www.ti.com/tool/TIDM-BUCKBOOST-BIDIR

0 jaures Hsieh over 1 year ago in reply to Gus Martinez

Prodigy 245 points

hello

see the sprabx5.pdf ,no calculate the dcm or Iob.

calculate buck mode dcm duty

vin=53v,vo =28.6 v;l=3.2uh;fs=100khz ;iout=1A

The CCM duty=D0=0.5396, iout min=20.57A

The Iout=1A the duty=0.1189

ccm to dcm limit=Iob=20.57A

But the buck-boost,how to calculate?

if you have and ref dtata ,please let me know

beacuse i need diode emulation mode(DE mode) use in CLA(DSP).

Calculate DCM ,the dynamic on/off S2s in cla.

thank you your response

0 Gus Martinez over 1 year ago in reply to jaures Hsieh

TI__Mastermind 29521 points

Apologies, I don't have this data or guidance to give you.

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TMS320F28076: f28076 four-switch non-inverting buck–boost