TI AUTOMOTIVE · PART DECISION PAGE
BQ79731B-Q1
Battery-junction-box voltage and current monitor
Measures divided-down high-voltage nodes and current for BJB/contactors, a different role from per-cell AFEs. Use an appropriately designed front end; the public datasheet is abbreviated and the pins are not direct high-voltage-pack inputs.
5-second verdict
Key specifications
Orderable variants (OPNs)
The GPN is for selection; the full OPN is for ordering. These examples were observed on the verification date, not live stock. Variants may differ in package, temperature, gain/threshold and, for PMICs, NVM/sequencing. Distinguish TA from TJ in the exact datasheet.
| OPN | Package | Temperature | Note |
|---|---|---|---|
| BQ79731BQPHPRQ1 | HTQFP (PHP) · 48 pin | −40°C to +125°C (datasheet ordering table) | Verify exact OPN, temperature definition and revision; not a stock claim. |
Official ordering page: https://www.ti.com/product/BQ79731B-Q1
Typical applications
FAQ
Do 17 voltage channels mean a 17-cell monitor?
No. BQ79731B targets pack/junction-box nodes. Series-cell monitoring uses a suitable cell monitor and its channel architecture.
Can this page label it Grade 1?
The reviewed source states AEC-Q100 and −40°C to +125°C, but no numeric grade. We retain that uncertainty instead of deriving qualification from temperature.
How should I verify the BQ79731B-Q1 orderable?
The page lists 1 OPN examples from official material checked on 2026-11-06. Match package, function options and temperature definitions; obtain live price/stock from TI or authorized distributors.
Sources and verification
Related selection and design checks
NuAxi is an independent semiconductor market-intelligence platform and is not affiliated with Texas Instruments. Information is for selection reference only and is not a design, certification or procurement guarantee; verify against TI's official datasheet, ordering page and terms.