bq40z50 IC in ICT test

J.C Chen

Other Parts Discussed in Thread: BQ40Z50, BQ40Z50-R1

Hi, All

In the in circuit test, we test try to check if each pin of bq40z50 is mounted to pcb well. There is detail data for each pin in the datasheet.

Will TI give any proposal for this?

J.C

over 8 years ago

0 Damian Lewis over 8 years ago

TI__Mastermind 34775 points

Hi J.C,

Is there an issue with the detailed pin information in the datasheet? We provided the information so our customer can use it to create their own test plan based on their PCB/application.

Do you have a specific question or concern you need us to assist you with? Be sure not to exceed the recommended or ABS max conditions stated in the datasheet.

0 J.C Chen over 8 years ago in reply to Damian Lewis

Expert 1285 points

Hi, Damian

No issue, but big concern.

For example,

1) How to check that the pin 25 (Fuse) is connected to R17 well? I want make sure the pin is mounted well during SMT. We have no plan to test during pack assembly. If not mounted well, it's a big risk.

Another, is there a diodes inside the IC body? Do i need add a diode outside?

J.C Chen

0 Damian Lewis over 8 years ago in reply to J.C Chen

TI__Mastermind 34775 points

Hi JC,

The fuse pin should be pulled low unless the fuse is blown can be verified by probing both pins of R17 and by the bq40z50-R1. The gauge also checks whether the fuse is blown and will set the PFStatus()[FUSE] flag.

Where are you considering adding diodes? Please flow the reference circuit provided in the EVM Users guide.

0 J.C Chen over 8 years ago in reply to Damian Lewis

Expert 1285 points

Hi, Damian

Add diodes between R9 and Pin VCC. Is that necessity?

0 Damian Lewis over 8 years ago in reply to J.C Chen

TI__Mastermind 34775 points

Hi JC,

No diode is needed. In fact it's not recommended to use diode for the VCC pin.

Power management

Power management forum

bq40z50 IC in ICT test