会社ブログについて Supplying the BQ24259 Drone Chip – High-Performance I²C-Controlled 2A Single-Cell USB Charge Management IC

With the rapid development of consumer drones, smart wearable devices and portable electronic products, efficient, safe and compact battery charging management solutions have become an essential requirement for the industry. As a specialist supplier with nearly 30 years’ experience in the electronic components industry, Mingjiada Electronics now offers original, in-stock supplies of Texas Instruments’ (TI) high-performance battery management chip—the BQ24259RGER (BQ24259)—providing outstanding power path management and charging solutions for drones, smartphones, tablets and various portable devices.

BQ24259 Product Overview

The BQ24259 is a highly integrated switch-mode battery charge management and system power path management device launched by Texas Instruments, specifically designed for single-cell lithium-ion and lithium-polymer batteries. Its low-impedance power path optimises switch-mode operating efficiency, significantly shortens battery charging time and extends battery life during the discharge phase. With flexible configuration of charging and system settings via an I²C serial interface, the BQ24259 has become the preferred choice for power management solutions in numerous portable devices.

BQ24259 Key Technical Specifications

Chip Type: Charge Management IC (Battery Management)

Brand: Texas Instruments

Input Voltage Range: 3.9V – 6.2V

Overvoltage Protection: 6.4V

Maximum Charge Current: 2A (programmable)

Battery Type: Single-cell lithium-ion/lithium-polymer battery

Battery Pack Voltage: 4.2V

Operating Temperature: -40°C to +85°C

Quiescent Current (Iq): 20μA

Interface Type: I²C, USB

Package Type: VQFN-24 (4mm × 4mm)

Fault Protection: Overcurrent, Overtemperature, Overvoltage

BQ24259 Key Features and Advantages

1. Charging efficiency of up to 90 per cent

The BQ24259 utilises synchronous rectification technology to deliver switch-mode charging efficiency of up to 90 per cent. In applications such as drones, where flight endurance and charging speed are critical, this high efficiency translates to shorter ground charging times and longer flight operation times.

2. Flexible USB Input Compatibility

The chip supports standard USB charging with a single input voltage ranging from 3.9V to 6.2V, and provides 6.4V overvoltage protection. Input current limit settings include 100mA, 150mA, 500mA, 900mA, 1A, 1.5A and 2A, ensuring full compatibility with USB 2.0 and USB 3.0 power specifications. The BQ24259 can adapt automatically to either a standard USB host port or a dedicated USB charging port.

3. NVDC Power Path Management

The BQ24259 integrates narrow-range VDC (NVDC) power path management technology, which regulates the system voltage to a level slightly above the battery voltage, whilst ensuring it does not fall below the minimum system voltage of 3.5V (programmable). This feature enables the system to start up and operate immediately even when the battery is completely depleted or not installed at all—which is crucial for devices such as drones that cannot afford downtime due to battery issues.

When the input source current or voltage reaches its limit, the power path management automatically reduces the charging current to zero and begins discharging the battery to meet the system’s power requirements, effectively preventing input source overload.

4. USB OTG Functionality

The BQ24259 supports USB On-The-Go (OTG) operation, providing an adjustable output voltage of 4.55 V to 5.5 V (5 V by default) on the VBUS, with precise current limiting up to 1.5 A. The fast OTG start-up time is just 22 ms (typical), whilst the 5 V boost mode efficiency is as high as 90 per cent. This feature enables drones to power external devices—such as remote controls, video transmission modules or mobile phones—via the USB interface, thereby expanding the range of practical applications for the device.

5. Autonomous Charging and High-Precision Control

The BQ24259 supports autonomous completion of battery charging cycles, whether or not managed by a host device. The charging process is automatically divided into three stages: pre-regulation (trickle charging), constant-current charging and constant-voltage charging. Charging is automatically terminated when the charging current during the constant-voltage stage falls below a preset threshold; a new charging cycle is automatically initiated when the battery voltage drops below the recharge threshold.

In terms of accuracy, the BQ24259 offers ±0.5% charging voltage regulation accuracy, ±7% charging current regulation accuracy and ±7.5% input current regulation accuracy.

6. Multiple Safety Protections

The chip incorporates comprehensive built-in safety protection mechanisms: battery temperature sensing (supporting both charging and OTG mode discharge), battery charging safety timer, thermal regulation and thermal shutdown, input and system overvoltage protection, MOSFET overcurrent protection, and more. Intermittent-mode overcurrent protection with ±15% accuracy further enhances system reliability.

7. Compact Package and Low Power Consumption

It utilises a 4 mm × 4 mm VQFN-24 package, making it suitable for space-constrained drone motherboard designs. The 1.5 MHz switching frequency supports the use of slim 1.2 mm inductors, further reducing the overall height of the solution. The low battery leakage current of 20 μA supports transport mode, making it suitable for the storage and transport of drone products.

Mingjiada Electronics Supply and Services

Shenzhen Mingjiada Electronics Co., Ltd., a globally renowned independent specialist distributor of electronic components with nearly 30 years’ experience in the industry, now supplies the full range of Texas Instruments battery management and various battery charger products from genuine stock to the market.

Supply Details

Product Model: BQ24259RGER (BQ24259)

Brand: Texas Instruments

Package: VQFN-24 (4 mm × 4 mm)

Packaging: Tape and Reel (TR), 3,000 pieces per reel

Status: In stock

Operating Temperature: -40°C to 85°C

Mingjiada’s Core Advantages

Nearly 30 years of industry expertise: Professional experience in the supply and service of electronic components

Guarantee of genuine products: All chips supplied are genuine TI products

Stock availability: BQ24259RGER is available in large quantities from stock, supporting rapid delivery

Wide range of applications: In addition to drones, widely used in smartphones, tablets, network equipment, portable audio speakers and other fields

Contact Us

Contact: Mr Chen

Mobile: +86 13410018555

Email: sales@hkmjd.com

Website: www.integrated-ic.com

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