UC1625-SP: UC1625-SP-Space application motor controller support

Hi CJ,

Thank you for posting to the MD forum!

1) We still do not have development boards for this since this is an older device. 

2) In regards to stack-up recommendations, we do not have any on hand for this device specifically. You can try and look for any layout information for CDIP SB JDJ packaging on the web and adhere to other examples. TI does have another device that uses this package specifically (OPA4277-SP), and their datasheet includes a layout example for their package in Section 10, although I am not sure if there any differences due to its functionality as an OpAmp. For any information in regards high current paths in layout, please refer to our Motor Driver Layout App Note: https://www.ti.com/lit/slva959. There should be no special considerations needed for space-grade layout in comparison to industrial layouts. 

3) These discrete components are just used for reference to the application. This gate driver device was redesigned from an industrial device in the past, so the block diagram used industrial discrete components that are not space qualified. You may replace the BJTs and FETs with space-grade parts that have similar specs. 

Thanks,
Aaron

Dear Aaron

Thanks for getting back to me quickly I will keep the same numbering of questions:

1. On the space portfolio (TI 2021) for brushless motor control the only option currently is the UC1625-SP but you write me is an older device, have Texas Instrument other alternative (Non space) as COTS in TI portfolio (meaning qualified for MIL or Space grade for motor controlling), much better if has flight heritage? a newer reference to be used in order to replace the older device (I know there are other industrial options, but interested on qualified candidates).

2. Many thanks for the Motor driver Layout guideline, is interesting because connecting with previous point, THT is not common even for power applications as these days, but as the only candidate have this "older" package we included as possible candidate, then this point is solved, I will be reviewing this point and waiting for advices from point 1.

3. This point was solved, but could be nice to put in revision history of datasheet "just for reference", I had my doubts but you answered :), no worries.

CJ

Hi Carlos,

1) Although the newest revision of Texas Instruments' space portfolio includes this device (UC1625-SP), this device was released in 2011 and is our only space-grade BLDC gate driver that we support. In regards to non-space BLDC gate drivers, we don't have any information about any industrial-grade drivers that have been used in space applications. Please clarify if this is what you are inquiring about!

2) Glad this helps.

3) It is not likely that the datasheet will be updated because the device is older, however we can mark this thread as a reference if future customers inquire about the part selection in the block diagram!

Thanks,
Aaron