DRV595: DRV595 higher power version or alternate TI parts to drive a TEC?

Chris Rawle

Part Number: DRV595
Other Parts Discussed in Thread: TPA3255

I have been using the DRV595 to drive a TEC with success (4A, 12VDC) however I now need more current (up to 10A). Is there a higher current version of this IC or alternatively is there a similar driver which I can interface with external mosfets? Perhaps a monolithic high power H-Bridge IC? Like the DRV595 it would be ideal to drive the differential input single ended and run the driver at a minium of 400kHz in order to keep component size and electrical noise/ripple to a minimum for the TEC.

Any suggestions appreciated!

over 6 years ago

0 Robert Clifton56 over 6 years ago

TI__Mastermind 25370 points

Hi Chris,

Are you planning on using the same 12VDC supply to power the IC? Is there any other important key features that you will need this new system to have?

Best Regards,

Robert Clifton

0 Chris Rawle over 6 years ago in reply to Robert Clifton56

Prodigy 240 points

Hi Robert,

yes it would be the same 12VDC supply (the TEC is rated up to 14VDC). The DRV595 circuit I designed closely follows the TI reference design though in this particular case a 12bit DAC provides the single ended input to IN+ while the IN- pin is biased to 3V. It works as required and only lacks the ability to provided higher currents up to 10A.

Regards,

Chris.

0 Robert Clifton56 over 6 years ago in reply to Chris Rawle

TI__Mastermind 25370 points

Hi Chris,

I forgot to ask if you know what the load's impedance is? I'm trying to narrow down our options. A lot of devices that are able to output higher power (thus higher current) tend to also have a higher load impedance as well as a minimum supply voltage.

Regards,

Robert Clifton

0 Chris Rawle over 6 years ago in reply to Robert Clifton56

Prodigy 240 points

Hi Robert, sorry I missed your reply.

the load (TEC) is 1.17 ohm

(https://www.digikey.com/products/en?keywords=1487-1013-ND)

0 Yanming Gong over 6 years ago in reply to Chris Rawle

TI__Mastermind 19650 points

Hi Chris,

For high power amplifier devices, you can choose TPA3255.

Hoping that can help you.

Regards,

Derek

0 Robert Clifton56 over 6 years ago in reply to Yanming Gong

TI__Mastermind 25370 points

Hi Chris,

Adding to Yanming's comment, the TPA3255 can drive this device but the input control is an analog signal rather than a PWM input like the DRV595. It also can only get up to 600kHz switching frequency on the output FETs.

Best Regards,

Robert Clifton

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DRV595: DRV595 higher power version or alternate TI parts to drive a TEC?