BQ27510DRZT-G3

BQ27510DRZT-G3 is Texas Instruments’ single‑cell Li‑ion battery fuel gauge with Impedance Track. It provides accurate state of charge (SOC), state of health (SOH), remaining capacity, and estimated time to empty by combining coulomb counting with impedance-based calibration that adapts to aging and temperature.
Key points:
- Interface: two‑wire I2C/SMBus‑like interface for reading/writing gauge registers.
- Core function: external current sense resistor (Rsense) and temperature sensing (NTC) to monitor pack conditions; monitors voltage, current, and temperature continuously.
- Algorithms: Impedance Track for fast, robust SOC tracking and automatic calibration.
- Outputs: SOC, SOH, remaining capacity, full/empty flags, and runtime estimates.
- Packaging: DRZT version, RoHS compliant; designed for 1S Li‑ion/Li‑poly packs.
- Ecosystem: works with TI’s bqStudio for configuration and monitoring.
- Applications: smartphones, wearables, IoT devices, and other portable products requiring accurate fuel gauging.
No external MCU is required for basic operation; you read gauges via the host MCU or bqStudio.

Key features of BQ27510DRZT-G3 (single-cell Li‑ion/Li‑polymer gas gauge):
- ModelGauge m5EZ-based fuel gauge for accurate SoC estimation across temperature and load.
- Coulomb counting with automatic capacity learning; stores design capacity, full charge capacity, remaining capacity, and cycle count in nonvolatile memory.
- SMBus/I2C host interface for register access, data, and alerts.
- External sense resistor (Rsense) for current measurement and external NTC thermistor for temperature.
- Operating range: 2.5 V to 4.6 V; temperature range -40°C to 85°C.
- Low power/standby mode with fast wake for battery-pack integration.
- Data flash support for calibration and customization by host system.
- Provides SoC, voltage, current, temperature, and alarms; commonly used with voltage/overcharge protection logic in packs.
- Package: DRZT-G3 (8-pin/leadframe options typical for TI gas gauges).

The BQ27510DRZT-G3 uses a 20-pin VQFN (leadless) package, typically 4.0 × 4.0 mm with 0.8 mm pitch. The “G3” suffix denotes RoHS/green (lead-free) packaging.

- Pin count: 16 pins (16‑pin package)
- Function: Battery fuel gauge IC for Li‑ion cells. Provides coulomb counting, voltage/current/temperature sensing, and reports state of charge (SOC), remaining/design capacity, health status, etc., via SMBus/I2C to a host system.

Manufacturer: Texas Instruments (TI).
Type of company: American multinational semiconductor company that designs and manufactures analog, mixed-signal, and embedded processing integrated circuits.

BQ27510DRZT-G3 is a single-cell Li-ion/Li-polymer gas gauge (Impedance Track). Applications: 1S battery packs in portable consumer electronics and wearables requiring accurate SOC/SOH data—smartphones, tablets, digital cameras, MP3/MP4 players, handheld game/controllers, wearables, medical devices, IoT devices, cordless tools, and other handheld instruments. Interface: I2C/SMBus to the host.