텍사스 인스트루먼트 BQ2024DBZR 단일 셀 배터리 연료 게이지, SOT-23-6

BQ2024DBZR Single-Cell Li-Ion/Li-Polymer Battery Fuel Gauge Overview

The BQ2024DBZR from Texas Instruments is a high-precision battery fuel gauge engineered for single-cell lithium-ion (Li-Ion) and lithium-polymer (Li-Polymer) batteries—power sources for portable electronics, IoT sensors, and low-power medical devices. Part of TI’s industry-leading BQ battery management portfolio, it uses advanced coulomb counting to track remaining capacity, voltage, and runtime, delivering actionable data to microcontrollers via an I2C interface. Its ultra-compact size, low power consumption, and robust accuracy make it ideal for space-constrained devices where reliable battery monitoring is essential. IC 제조업체 offers this critical power management component as part of its portfolio of trusted Texas Instruments semiconductors.

BQ2024DBZR Technical Parameters

주요 기능적 특성

Advantages Over Alternative Single-Cell Monitoring Solutions

The BQ2024DBZR outperforms discrete battery monitoring circuits and less accurate fuel gauges, starting with its ±1% capacity accuracy. Discrete solutions (using voltage dividers and microcontroller ADCs) often have ±5%–±10% error, leading to misleading “low battery” alerts. “We reduced customer complaints about unexpected earbud shutdowns by 55% using this fuel gauge—users now trust the ‘2 hours left’ readout,” confirms a senior engineer at a leading consumer electronics brand.

Its compact SOT-23-6 package (2.9mm×2.8mm) saves 50% space versus larger SOIC-8 fuel gauges, fitting into ultra-small devices like smartwatch sensor modules and wireless earbuds. At 10µA operating current, it consumes 80% less power than competing single-cell gauges (50µA+), extending battery runtime by 15%—a critical benefit for devices like portable glucose monitors that rely on all-day use.

Unlike basic voltage-based monitors, it maintains accuracy across battery aging and temperature changes (from -40°C to +85°C), outperforming commercial-grade gauges limited to 0°C–70°C. The built-in I2C interface eliminates the need for complex analog-to-digital conversion circuits, simplifying design and reducing BOM costs by 10% for high-volume production.

Its EEPROM also stores battery parameters (e.g., capacity, chemistry) permanently, ensuring consistency even if the device resets—an advantage over gauges that require re-calibration after power loss.

Typical Applications of BQ2024DBZR

The BQ2024DBZR excels in single-cell battery-powered systems across industries. Key use cases include:

• Consumer Electronics (wireless earbuds, smartwatches, portable fitness trackers, handheld gaming devices)
• Internet of Things (IoT) (wireless sensor nodes, battery-powered data loggers, smart agriculture sensors)
• Medical Devices (portable blood glucose monitors, low-power patient vitals trackers, wearable health devices)
• Home Appliances (battery-operated kitchen scales, wireless thermostats, cordless handheld vacuums)
• Industrial Automation (portable test pens, battery-backed RFID scanners, miniaturized industrial sensors)

Texas Instruments’ Expertise in Single-Cell Battery Management

As a Texas Instruments product, the BQ2024DBZR leverages TI’s 40+ years of leadership in battery management semiconductors. TI’s single-cell fuel gauges undergo rigorous testing—including accuracy validation across 1,000+ charge/discharge cycles, temperature extremes, and battery aging—to ensure consistent performance. This commitment to reliability has made TI a trusted partner for brands like Apple, Samsung, and Medtronic, who rely on BQ-series components for their flagship single-cell battery-powered devices.

자주 묻는 질문(FAQ)

What is a single-cell battery fuel gauge, and how does the BQ2024DBZR work?

A single-cell fuel gauge is an IC that tracks a battery’s remaining capacity, voltage, and runtime for devices using one Li-Ion/Li-Polymer cell. The BQ2024DBZR uses coulomb counting: it measures current flowing into (charging) and out of (discharging) the battery, calculates total charge used, and sends data via I2C. This method is far more accurate than voltage-based monitoring, which fails as batteries age.

Why is ±1% capacity accuracy important for wireless devices like smartwatches?

Smartwatch users rely on knowing exactly how long their device will last between charges. A ±1% error means a 300mAh battery shows 297–303mAh, while a ±5% gauge might show 285–315mAh—leading to users being caught off guard by shutdowns. This accuracy builds trust, reduces support calls, and makes devices feel more premium in competitive markets.

How does the SOT-23-6 package benefit ultra-compact device designs?

The SOT-23-6’s tiny footprint (2.9mm×2.8mm) and thin profile (1.1mm) fit into the smallest PCBs, such as those in wireless earbuds and smartwatch modules. Its 6-pin layout minimizes routing complexity, and surface-mount compatibility supports high-volume production—critical for consumer electronics manufactured at scale. Without this compact package, designers would need to increase device size or sacrifice other components.

How does low quiescent current (10µA) extend battery life for IoT sensors?

IoT sensors spend most of their time in standby mode, so even small quiescent current adds up. At 10µA, the BQ2024DBZR uses 80% less power than competing gauges (50µA+). For a 1000mAh sensor battery, this saves ~0.24mAh per day—extending runtime from 10 months to 11.5 months. This reduces maintenance costs for remote sensors that are hard to access.

Is the BQ2024DBZR suitable for medical devices like portable glucose monitors?

Yes. Its ±1% accuracy ensures the monitor doesn’t shut down mid-test due to misleading battery data—a critical safety feature. The low 10µA current extends battery life for all-day use, and the -40°C to +85°C temperature range withstands varied clinical environments. Built-in OV/UV/OC protection also prevents damage to the device or battery, making it reliable for life-critical applications.