LM5145: using two LM5145's to drive TEC/Peltier module?

Bart

Part Number: LM5145
Other Parts Discussed in Thread: LM10011,

Team,

we have an application where we need to drive a TEC/Peltier module for both heating and cooling (up to 7A current flowing through the module in one or another direction).

Would that be achievable with two LM5145 used as below? Each of the LM5145's would need to transition from being current source to current sink and vice-versa (controlled for instance with LM10011).

Thanks for your advice.

over 6 years ago

0 Katelyn Wiggenhorn over 6 years ago

TI__Genius 11040 points

Hello,

I have reached out to the product expert on this question, and I will follow up with his advise.

Best Regards,
Katelyn

0 Timothy Hegarty over 6 years ago

TI__Guru 73202 points

Hi Bartosz,

The LM5145 was not designed or tested to behave as a current sink (effectively acting as a boost regulator with current flowing from the low-voltage to the high-voltage side).

Regards,
Tim

0 Bart over 6 years ago in reply to Timothy Hegarty

TI__Expert 6460 points

Hi Tim,

thanks for your feedback. In the documentation it is mentioned that LM5145 can work as current sink in the Forced PWM mode (3.5-A Sink Capability), or is not the same what we're looking for?

Can you advise then any other approach here?

0 Bart over 6 years ago in reply to Bart

TI__Expert 6460 points

Hi there,

do you have any feedback on that?

Thank you

0 Timothy Hegarty over 6 years ago in reply to Bart

TI__Guru 73202 points

Hi Bartosz,

I will follow up offline with you on this.

Regards,
Tim

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LM5145: using two LM5145's to drive TEC/Peltier module?