Other Parts Discussed in Thread: BQ76952, BQ769142
I see that this component is available only from TI directly. When will it be available from distributors such as Mouser, Farnell, Digikey? Thanks!
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Hi Ben,
We can't comment on the availability of our parts at distributors so I suggest you go & check directly on their websites. You can also reach out to the TI Customer support center.
Hi David, do you know if this part has been released to distributors at all? Is the delay on the distributor side or on the supply side?
What I'm trying to find is whether production quantities will soon be available (within a month or two), or if the only stock ready for sale is the 5,991 units available from TI.
Ben,
BQ76942 has been released to all customers including distributors and production is on-going, in high volumes. Our lead-times are currently higher than 1-2 months so I recommend you order ASAP from ti.com
Hi David,
I was going to purchase today, there were 3,568 in TI stock last night but that stock dropped to 0 during today's working day. Talk about bad luck! Looks like someone went in and bought out the entire stock, or maybe TI just froze all orders on this device?
Either way, is there any way to purchase these now? I've just spent the last few days designing a board with this component and will have to start from scratch.
If it's impossible to get hold of these for the next few months, could you recommend any alternative parts? I need:
If there's any chance you could hook me up with prototyping stock for the BQ76942 instead of a redesign I'd be super grateful.
Thanks
Ben
Hi Ben,
The inventory has been consumed by multiple customers. We're working on getting a new batch of BQ76942 samples on ti.com but I do not have an exact ETA for the time being. Maybe end of March.
Alternative parts from the same family of monitors are BQ769142 (14s) & BQ76952 (16s): these parts are p2p to BQ76942, use the same commands, can handle 10s as well. BQ769142 has CRC enabled & REG1 enabled by default. BQ76952 is probably your best alternative if you cannot wait for samples (just don't use cell 11 to 16).
Hi David,
Thanks for your advice. When I looked previously the BQ76952 seemed to be out of stock as well, but I'm glad it is in stock.
The BQ76952 datasheet mentions that cell inputs 1, 2 and 16 should always be connected to actual cells, and that unused inputs should be shorted to adjacent cells.
I think there's a good chance that we may want to use the same PCB design for a BQ76942 version once it comes out however the BQ76942 datasheet lists the 'unused' inputs (pins 1, 3, 5, 7, 9, 11) as NC.
If we wanted to maintain compatibility between BQ76942 and BQ76952, is it safe to connect as follows (shorting NC pins to adjacent pins)?
Pin 48: Cell 6 Upper Pin 01: Cell 5 Upper / Cell 6 Lower Pin 02: Cell 5 Upper / Cell 6 Lower Pin 03: Cell 5 Upper / Cell 6 Lower Pin 04: Cell 5 Upper / Cell 6 Lower Pin 05: Cell 5 Upper / Cell 6 Lower Pin 06: Cell 5 Upper / Cell 6 Lower Pin 07: Cell 5 Upper / Cell 6 Lower Pin 08: Cell 5 Upper / Cell 6 Lower Pin 09: Cell 5 Upper / Cell 6 Lower Pin 10: Cell 5 Upper / Cell 6 Lower Pin 11: Cell 4 Upper / Cell 5 Lower Pin 12: Cell 4 Upper / Cell 5 Lower Pin 13: Cell 3 Upper / Cell 4 Lower Pin 14: Cell 2 Upper / Cell 3 Lower Pin 15: Cell 1 Upper / Cell 2 Lower Pin 16: Cell 1 Lower
Hi Ben,
Yes, this should work for both devices. When you program the register settings for the device, make sure to set the VCell Mode register to indicate which cells are connected. When using the BQ76952, you should set this register to 0x802F and for the BQ76942 you should set this register to 0x021F.
Best regards,
Matt