BQ79656PAPRQ1 is an automotive-grade 16-cell battery monitor and balancer AFE IC manufactured by Texas Instruments (TI). It is packaged in HTQFP-64 (PAP, 10×10mm), supplied in tape & reel with 1000 pcs per reel, MSL Level3. It is designed for high-voltage lithium battery pack BMS systems, with AEC-Q100 Grade1 qualification and supports ISO 26262 ASIL-D functional safety requirements.
2. Model Definition
- BQ79656: Device family, up to 16 series cell monitoring
- PAP: HTQFP64 package
- R: Tape & reel packaging
- Q1: Automotive AEC-Q100 Grade1 qualified
3. Core Electrical Specifications
- Supported cells: 6S ~ 16S lithium battery
- Max module voltage: 80V
- Operating temperature: -40℃ ~ +125℃
- Built-in balancing current: 240mA, auto pause/resume by temperature
- ADC: 16-bit main ADC, capable of completing measurement of 16 cells within 200μs
- Interface: Isolated Daisy-chain, UART, SPI
- Built-in functions: Cell voltage sensing, shunt current sensing, 8-channel temperature measurement, open wire detection, OV/UV/OT hardware protection
4. Key Features
- Automotive high safety: AEC-Q100 Grade1, supports ISO26262 ASIL-D system design, independent hardware protection.
- High precision measurement: Integrated analog front filter and digital low-pass filter, improves SOC/SOH calculation accuracy.
- Stackable architecture: Daisy-chain communication allows multiple IC cascading for high voltage packs beyond 16S.
- Autonomous cell balancing: 240mA passive balancing with thermal protection.
- Synchronous current & voltage sampling, good for coulomb counting.
- RoHS & Halogen-free compliant.
5. Applications
- EV / HEV traction battery BMS
- High voltage energy storage battery packs
- High-power e-mobility and industrial lithium battery systems
6. Family Alternatives
BQ79654-Q1 (max 14S), BQ79652-Q1 (max12S), same platform, fewer cell channels.
English Simple Short Version
BQ79656PAPRQ1 is TI automotive grade 16S battery monitor & balancer AFE IC, HTQFP64 package, AEC-Q100 Grade1 qualified and ASIL-D ready. It monitors 6~16 lithium cells, measures voltage, temperature and pack current. Integrated 240mA passive cell balancing and hardware protection functions. Daisy-chain interface supports multi-device stacking for high voltage battery packs. Typical applications: EV battery BMS, energy storage systems. Operating temperature: -40℃ ~125℃, tape reel 1000pcs/reel, MSL3. BQ79654-Q1 (14S) and BQ79652-Q1 (12S) are pin-compatible family options.
