BQ27750DRZR

BQ27750DRZR is a Texas Instruments digital gas gauge (fuel gauge) IC for Li-ion/Li-polymer battery packs. It implements TI’s Impedance Track algorithm to estimate state of charge (SOC) and state of health (SOH) over the cell life. It continuously monitors cell voltage, discharge/charge current (via an external sense resistor), temperature, and impedance to report SOC, remaining design capacity, full charge capacity, and health indicators to a host controller.
Interface and config: uses a two‑wire I2C/SMBus‑compatible serial interface, with status/alert flags and configurable thresholds. It stores calibration/learn data and can auto‑learn as the cell ages.
Packaging: DRZR denotes a specific TI packaging variant; check TI’s product page for the exact mechanical drawing and pinout.
Applications: portable electronics, tools, tablets/laptops, and any pack with an integrated BMS that needs accurate, aging-aware SOC/SOH reporting.
In short: a compact, aging-aware Li‑ion gas gauge with self-learning, health reporting, and I2C control suitable for pack-level BMS.

Here are the key features of the BQ27750DRZR (gas gauge IC):
- Li-ion/Li-poly battery pack gauge for 1–4 series cells
- Coulomb counting fuel gauge with SOC estimation
- Real-time monitoring: pack voltage, current, and temperature
- Remaining capacity, design capacity, and full-charge capacity tracking
- On-chip EEPROM for calibration data and battery parameters
- SMBus/I2C interface for host communication
- Auto-capacity learning and aging compensation
- Safe-operation features with fault reporting (over/under voltage, overcurrent/short-circuit)
- NTC temperature sensing input
- Low-power sleep mode with wake on bus activity
- Status flags and diagnostic information for integration
Note: For exact register map, programming details, and supported chemistries, refer to the TI datasheet.

16-pin WSON package (2.9 × 3.0 mm), RoHS-compliant.

Pin count: 16 pins (DRZR in a WSON-16 style package).
Function: TI bq27750DRZR is a Li‑ion battery gas/fuel gauge IC. It performs coulomb counting and SOC estimation, measures cell voltage, current, and temperature, stores gauge data, and provides an I2C/SMBus interface (to the host or system controller) along with alerts/interrupts for battery management.

Manufacturer: Texas Instruments (TI).
What kind of company: TI is an American multinational semiconductor company that designs and manufactures analog and mixed-signal integrated circuits, embedded processors, and related semiconductor products.

BQ27750DRZR is TI’s battery fuel gauge for Li‑ion/Li‑polymer packs used in portable electronics and multi‑cell packs for industrial/telecom equipment. Applications include smartphones, tablets, wearables, medical devices, cordless tools, cameras, and energy‑storage modules. It delivers SOC estimation, coulomb counting, voltage/temperature monitoring, impedance tracking, and protection signaling for safe, efficient battery management.