TPS53632G: I2C

Shailendra Pardeshi

Part Number: TPS53632G
Other Parts Discussed in Thread: LMG5200, , LM5141

Hello,

I am planning to build a GaN FET based buck converter 24V to 5V @ 1A Max. Can I use any other TI’s synchronous buck controller (1MHz switching) to drive LMG5200? I don’t want to use I2C control to program output voltage to keep it very simple. Solution for LMG5200 half bridge GaN makes use of TPS53632g and needs to be configured/set through I2C

Regards,

Shailendra

over 7 years ago

0 Alberto Doronzo over 7 years ago

TI__Expert 4640 points

Hi Shailendra,

for a simple buck application to 5V the TPS53632G would not be the preferred solution, especially because the output-tied pins are limited to less than 3.3V (There are workarounds but would require more external components).

A better candidate for a buck controller up to 2.5MHz is the LM5141.

This is a current mode controller which can be used in combination with the LMG5200, by referencing the high-side outputs to ground rather than the switched node.

The operation would be limited to continuous PWM, disabling discontinuous mode at low loads.

If you would like more information about this application, feel free to share your contact with me and I will send you the appropriate collateral.

Regards,

Alberto

0 Shailendra Pardeshi over 7 years ago in reply to Alberto Doronzo

Prodigy 80 points

Thanks Alberto. I am interested to build a buck converter using LM5141 and LMG5200.

Please share suitable material and application notes

0 Alberto Doronzo over 7 years ago in reply to Alberto Doronzo

TI__Expert 4640 points

Hi Shailendra,

below is a schematic that you can use as guideline to get the LM5140 to operate correctly with the LMG5200.

0 Alberto Doronzo over 7 years ago in reply to Alberto Doronzo

TI__Expert 4640 points

LMG5200+LM5140 schematics.PDF

0 Don Dapkus over 7 years ago in reply to Alberto Doronzo

TI__Guru**** 189399 points

Hi, Shailendra,

Let us know if you have any questions about this.

Because of the Thanksgiving holiday in the U.S., TI E2E™ design support forum responses may be delayed from November 25 through December 2. Thank you for your patience.

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TPS53632G: I2C