Hi Furkan,
1. Yes, see the BQ76940EVM schematic or TIDA-00255
2. Yes, see TIDA-00449
3. Yes probably, you must design for the conditions. If needed, add drivers for the FETs
Part Number: BQ76940 Other Parts Discussed in Thread: TIDA-00255 , TIDA-00792 , Hi,
I need precharge circuitry reference design for 48v/90ah, three wheeler battery pack.
Kindly suggest appropriate design and documents for explaination if any.
R…
Part Number: BQ76920 Other Parts Discussed in Thread: BQ24650 , , BQ78350-R1 , BQ4050 , TIDA-00792 , BQ76940 , TIDA-00255 , I am currently trying to design a system with 3 Li-Ion batteries in series.
One battery is: 3.2V and 3.3Ah, therefore total of…
Hi Rohit,
Use external balancing for more than 5 mA balance current with BQ76930 and BQ76940. See examples in the http://www.ti.com/lit/pdf/slua749 application note or the EVM or TIDA-00255, TIDA-00449, TIDA-00792.
The input resistors must be large…
Hi Vaibh,
I don't know of a reference design for parallel modules, such implementations are unique to the system. In general ORing might be achieved with diodes or ORing controllers. You might look at products starting at http://www.ti.com/powerswitches…
Hi Bill,
I think a diode / resistor pair is needed to protect the FET by reducing the power during a heavy load. Section 9 of this app note discusses this need in much more detail: http://www.ti.com/lit/pdf/slua749
You can also refer to this 15s reference…
Hi User,
Yes, the bq76930EVM and bq76940EVM share the same board. The bq76940EVM is available as TIDA-00255, the bq76930 design is variant -002.
The TIDA-00449 is also a bq76930 design with files available, it uses a MCU. If using the TIDA-00449 design…
Hi Neil,
We have plenty of TIDesigns with CAD files (among other documents).
Here is an example which should be suitable for your question: www.ti.com/.../TIDA-00255
You can find TIDesigns at www.ti.com/.../index.html
Regards,
David
Hi Furkan,
As David noted, for 15 cells a stacked solution is not needed, the BQ76940 can support 15 cells. For a high side switched application see TIDA-00792, for a low side solution see (the EVM) or TIDA-00255. The BQ76940 will give 3 temperature…
Hi Yoshwa,
The bq76920EVM board is not presently available for download. The board for bq76930EVM and specifically the bq76940EVM is available for download as TIDA-00255, this is often a useful starting point although it has more cells so more circuitry…
