BQ20Z90DBTR-V150

BQ20Z90DBTR-V150 is a Texas Instruments battery fuel gauge IC for Li‑ion/Li‑poly packs. It uses Impedance Track technology to estimate State of Charge (SOC), state of health, and remaining capacity by combining coulomb counting with voltage, current, temperature, and impedance measurements.
Key points:
- Functions as a gas gauge and pack monitor, providing SOC/SOH data and protection signaling (via an I2C/SMBus interface to the host MCU).
- Requires external components such as a current sense resistor and a temperature sensor (NTC) and is used with a charger/pack-management design.
- Package: DBTR variant; -V150 indicates a device revision/version (design/firmware variant for this part).
- Typical applications: single‑cell or small multi‑cell Li‑ion/Li‑poly packs in portable devices (phones, wearables, handhelds).
For exact specifications, connections, and reference designs, consult the TI BQ20Z90 datasheet and product page.

Key features of bq20Z90DBTR-V150 (TI gas gauge):
- Integrated battery fuel gauge with on-chip processor and firmware
- Li‑ion/Li‑poly pack support with coulomb counting (current sense) for SOC tracking
- Voltage, current, and temperature sensing for accurate gauge operation
- SOC and State‑of‑Health (SOH) estimation with learned/full-charge capacity tracking
- On‑chip non-volatile memory for design capacity, full charge capacity, cycle count, and user data
- Open/close-loop OCV lookup for improved accuracy and temperature compensation
- SMBus/I2C host interface with registers, alerts/interrupts, and control commands
- Battery protection features (over/under voltage, over-current/short-circuit) and safe-charge/discharge supervision
- Data logging and event counters; health monitoring
- Low-power operation with wake/sleep modes and watchdog compatibility
- Packaging: DBTR-V150 option (sensor/gauge in a compact package)
Note: This is a concise feature summary; for exact specs and cell-count support, refer to the product data sheet.

Pin count: 28 pins (DBTR package).
Function: Battery fuel gauge/controller (gas gauge) for Li‑ion/Li‑poly packs, with coulomb counting and monitoring of voltage, current, and temperature; provides SOC/remaining capacity via SMBus/I2C interface.

- Manufacturer: Texas Instruments Incorporated (TI).
- Company type: American multinational semiconductor company that designs and manufactures analog, mixed-signal, and embedded processing integrated circuits for a wide range of markets.

BQ20Z90DBTR-V150 is TI’s lithium‑ion battery gas gauge and protection IC. It performs coulomb counting, voltage/temperature monitoring, and over‑current/short‑circuit protection with a digital interface to the system host. Typical application areas include:
- Portable consumer electronics (phones, cameras, handheld devices)
- Cordless power tools and portable instruments
- IoT sensors, wearables, and other battery‑powered products
- Small medical devices and instrumentation requiring accurate state-of-charge info

BQ20Z90DBTR-V150 uses a 16-pin VQFN package (4.0 × 4.0 mm) with an exposed pad. The “TR” suffix indicates Tape-and-Reel packaging.