DRV8305-Q1: the difference between DRV8305NQPHPRQ1 and DRV8305NPHPR

Hi Kura-san,

DRV8305NQPHPRQ1 is automotive grade 1 version of DRV8305, with VREG applied externally (internal VREG regulator and VREG_UV fault are disabled). DRV8305NPHPR is industrial version.

Thanks,
Aaron

Hi Kura-san, 

Following up on this item - 

Quick question: What is your customer's application? Is it automotive? 

From our database information, these two devices have:

• different silicon die (but design may be quite similar) 
• different qualification classification (automotive vs industrial) 
• same Assembly/Test site facility,
  • but different production test coverage (more test coverage on the automotive Q1 version) 
  • assembly bill-of-materials components are the same/similar between the two devices 

Thanks and Best Regards, 
Andrew 

Hi Kura-san, 

Also one more note: when you are selecting the Q1 vs non-Q1 substitute, please be sure to know the below key differences in the variants of the DRV8305x device family. 

This mainly has to deal with the LDO voltage reference in 3 vs 5 vs N vs NE options. 

• The device either has an integrated LDO to provide 3.3V or 5V, or requires an external VREF input voltage supply. 
• Industrial (non-Q1) vs Automotive (-Q1) is not as drastic of a change in functional performance, other than test coverage and qualification effort
  • this means pin-to-pin substitution should be ok as long as you're keeping the same type of VREG/VREF option 

Best Regards, 
Andrew 

Hi Kura-san, 

Thanks for your answer on this!

I think the information above about Q1 (automotive) vs non-Q1 (industrial) should be helpful in your team's decision making of supply sourcing. 

• Main thing to keep in mind is differences in production test coverage and the silicon die/chip itself (might have a slightly different design for added robustness) 

I'll send another message internally to our team to see if the application (power slide door) itself has any major concerns

Best Regards, 
Andrew 

Hi Kura-san, 

Please see the chart below - if we are purely considering N vs NE versions, then the difference should be the over-temperature shutdown functionality. Should have no major difference between industrial (non-Q1) and automotive (Q1) from a functionality point of view 

Thanks and Best Regards, 
Andrew 

Hi Kura-san,

From my system records, these two devices (N vs NE) use different die inside. 

For these two Q1 devices, the NE version has 'extended' temperature coverage (up to 150C) so I believe the production test coverage might be more for this NE version compared to the N version (up to 125C). Test coverage is probably similar, but may have different temperature guardbanding and production test limits implemented for screening devices. 

Thanks and Best Regards, 
Andrew 

Hi Kura-san, 

Between the N vs NE versions, records indicate that the die name is different - but they may have the same (or very similar design). 

I am not too sure on the answer for that, and am not sure if I can share that publicly regardless - 

From pin-to-pin replacement perspective of DRV8305NQPHPRQ1 vs DRV8305NEQPHPRQ1, TI motor drivers team's advice is that production test coverage is different. If your application requires 150C max operating range then NE is the only option - but if you only need 125C, you can use either N or NE interchangeably for normal operation. 

Also note that the NE version specifically has over-temperature shutdown feature disabled by default, so if you are wanting to retain OTSD -> will have to configure that in the SPI settings for 'FLIP_OTSD' bit in Register map address 0x9

Best Regards, 
Andrew