LM5176: Is its output current adjustable according to the external MOSFET？

Amelie Zheng

Part Number: LM5176

Hi team,

Is its output current adjustable according to the external MOSFET？

customer input is 8-38V, output is 12V,

What can be achieved when the output current increases? Is it to replace an external MOSFET with higher current resistance?

over 4 years ago

0 EM over 4 years ago

TI__Genius 11215 points

Hello Amelie,

Thanks for your question.

Are you talking about the MOSFETs connected to the gate driver pins of the LM5176 (HDRV2, HDRV1, LDRV2 LDRV1)?

Kind regards,

Elisabetta

0 Amelie Zheng over 4 years ago in reply to EM

TI__Genius 10865 points

Hi Elisa,

Yes.Does the load output current capacity of LM5176 depend on the MOSFET current capacity?

0 EM over 4 years ago in reply to Amelie Zheng

TI__Genius 11215 points

Hello Amelie,

The MOSFETs of the full bridge are usually chosen taking into account their RDSon and their gate charge in order to calculate the power losses that they might cause and they also need to have a VDS high enough wrt to the VIN. The MOSFET also need to be able to sustain the maximum peak current of the circuit and the maximum dissipated power not to get damaged. Usually all these info can be found in the datasheet of the MOSFETs.

I would suggest to use the quick start tool to see if the chosen MOSFETs are appropriate for your design

Kind regards,

Elisabetta

0 EM over 4 years ago in reply to Amelie Zheng

TI__Genius 11215 points

Hello,

I haven’t heard back from you, so I’m assuming you were able to resolve your issue. If not, just post a reply below (or create a new thread if the thread has been locked due to time-out).

Thanks,

Elisabetta

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LM5176: Is its output current adjustable according to the external MOSFET？