24V DC in, +-12V,100mA output, please suggest a suitable device.

Yue TANG

Other Parts Discussed in Thread: LMR36006, LMR36506, LMR36503, LM25019

Hi,

would you please help to recommend a solution : 24V DC in and + -12V, 100mA solution. also need to support short circuit protection。

Fewer devices are better。 thanks.

over 5 years ago

0 Milos over 5 years ago

TI__Expert 7925 points

Hi Tang,

As far as I can see, there is no single device with split rail outputs and integrated switches that fits your requirements. I will reassign the thread to another organization.

Best regards,
Milos

0 Marshall_Beck over 5 years ago

TI__Mastermind 35210 points

What about flybuck?

http://www.ti.com/lit/an/snva674b/snva674b.pdf

Or you can do two chip solution:

I am unsure of what the input is, Ill assume it has transients

You could do one implementation of typical buck with either LMR36006 or LMR36506 to generate positive supply

You could do another implementation of inverting buck boost with either LMR36006 or LMR36506 to generate negative supply

http://www.ti.com/lit/an/snva856/snva856.pdf

0 Yue TANG over 5 years ago in reply to Marshall_Beck

TI__Expert 8695 points

Beck,

Thanks for the suggestion. your two buck solution is OK for customer. would you please suggest a 100mA, cost efficient device to produce the negative rail, also need to support short protection. thanks.

0 Marshall_Beck over 5 years ago in reply to Yue TANG

TI__Mastermind 35210 points

Either LMR36503 or LMR36506. Both will work for 24 to neg12 at 100mA with 30% inductor ripple.

0 Yue TANG over 5 years ago in reply to Marshall_Beck

TI__Expert 8695 points

Just noticed these devices you recommended is quite new. please suggest if LM25019 can support the same function? thanks.

http://www.ti.com.cn/product/cn/LM25019

0 Marshall_Beck over 5 years ago in reply to Yue TANG

TI__Mastermind 35210 points

LMR36006 is also option.

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24V DC in, +-12V,100mA output, please suggest a suitable device.