UCD3138PSFBEVM-027: Is UCD3138PSFBEVM-027 an advanced phase-shifted full bridge?

zoujiangyilang

Hello, is the main circuit on the UCD3138PSFBEVM-027 development board using a diode-clamped advanced phase-shifted full bridge?

Some documents say that the loss of the lagging type is smaller, why do you choose the leading type?

If I want to change to the hardware and software design of the development board, instead of the hysteresis type,

Using the UCD3138PSFBEVM-027.pdf can I achieve the hysteresis type only by changing the hardware design, such as changing the position of the transformer primary and resonant inductance without changing the firmware?

over 3 years ago

0 Peter Meaney over 3 years ago

TI__Mastermind 31580 points

The UCD product is supported by our team in the US who are on vacation today.

I have notified the application engineer and they will respond on Monday.

Regards

Peter

0 zoujiangyilang over 3 years ago in reply to Peter Meaney

Genius 4560 points

Thank you.

0 zoujiangyilang over 3 years ago in reply to Peter Meaney

Genius 4560 points

I looked at the PWM timing from the figure above.

I compare the above two figures, QT2 leads QB1, QB2 leads QT1, so it is presumed to be the lead type.

0 zoujiangyilang over 3 years ago in reply to Peter Meaney

Genius 4560 points

Hello, if I want to change to hysteresis,

may I ask 4 primary PWMs for demo (DPWM2A-QT2/DPWM2B-QB2/DPWM3A-QB1/DPWM3B-QT1) and 2 secondary PWMs (DPWM0B-QSYN24/DPWM1B-QSYN13 ),

is it possible to swap the two primary arm PWMs of the 4-way primary PWM, such as (DPWM2A-QB1/DPWM2B-QT1/DPWM3A-QT2/DPWM3B-QB2) without changing the secondary PWM?

0 Sean Xu over 3 years ago in reply to zoujiangyilang

TI__Genius 14480 points

Swap 2A with 3A;

Swap 2B with 3B.

No need to change the secondary side DPWMs.

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UCD3138PSFBEVM-027: Is UCD3138PSFBEVM-027 an advanced phase-shifted full bridge?