LLC 2KW (24V 70A)?

Antonio Faggio

Other Parts Discussed in Thread: UCC256403, UCC28951, LM5046

Hi,

Do we have LLC IC 2kW 24V 70A to propose to customer for new designs? Write also me in private for any roadmap we might have.

Customer targets are;

Increase equipment efficiency

Do not use DSP but just analog solutions

It is a coupled question with: https://e2e.ti.com/support/power-management/f/196/t/851645

Many Thanks,

Antonio

over 5 years ago

0 Eric Faraci over 5 years ago

TI__Expert 8210 points

Antonio

We do not have an analog resonant LLC controller that can support up to 2kW. The only resonant LLC controllers TI has are half bridge devices, like UCC256403, which are designed to work below 1kW.

For 2kW we recommend our phase shift full bridge controller UCC28951. This device uses a full bridge so it can support 2kW better. It also achieves zero voltage switching so it has high efficiency.

Best Regards,

Eric

0 Antonio Faggio over 5 years ago in reply to Eric Faraci

TI__Expert 7920 points

Hi Eric,

Customer is ok with UCC28951 but asking whether we have some controller similar with UCC28951 but simpler so without SR control for instance?

Many Thanks,

Antonio

0 Eric Faraci over 5 years ago in reply to Antonio Faggio

TI__Expert 8210 points

Antonio

You do not need to use the SR control with UCC28951. UCC28951 can work with diode on output and the SR drive pins can be left floating.

We do have a family of controllers that support the PSFB topology available at the link below. Please note that UCC28951 is the latest PSFB controller so it has the best feature set for performance. If the input voltage is lower (less than 100V) then alternative controller LM5046 may be preferred.

http://www.ti.com/power-management/offline-isolated-dcdc-controllers-converters/pwm-resonant-controllers/products.html#~p1129=Phase-Shifted%20Full-Bridge

Best Regards,

Eric

Power management

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LLC 2KW (24V 70A)?