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Texas Instruments BQ24261MRGER
- Part No.:
- BQ24261MRGER
- Manufacturer:
- Texas Instruments
- Category:
- Battery Chargers
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
BQ24261MRGER.pdf
- Description:
- IC BATT CHG LI-ION 1CELL 24VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,929
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Product details
Overview
BQ24261MRGER from Texas Instruments is a host-controlled, single-input, single-cell Li-ion battery charger IC with integrated power-path management and USB-OTG boost capability. It delivers up to 3 A charge current at 93% peak efficiency, supports 30-V input overvoltage protection, and features Charge Time Optimizer (CTO) for accelerated CC/CV transition-enabling faster charging of 4000-mAh batteries. It operates in smartphones, tablets, and portable media players.
For engineers reviewing the BQ24261MRGER datasheet, BQ24261MRGER pinout, BQ24261MRGER application, or BQ24261MRGER equivalent, key selection considerations include its 24-pin QFN (RGE) package, I²C-programmable charge voltage (3.5–4.44 V), input current limit flexibility (USB100 to 2.5 A), JEITA-compatible NTC monitoring via TS pin, and integrated 17-mΩ power-path MOSFET for system power supplementation.
Technical Context
The BQ24261MRGER implements a synchronous buck switching regulator with integrated high-side and low-side FETs, enabling efficient DC-DC conversion from input (IN) to battery (BAT) and system (SYS) rails. Its power-path architecture allows simultaneous battery charging and system powering-even during deep discharge or no-battery conditions-via automatic priority arbitration between input source and battery.
Charge control uses three-phase sequencing (precharge, constant-current, constant-voltage) with thermal regulation active above 125°C and programmable safety timer. USB-OTG mode configures the device to boost battery voltage to 5 V at up to 1 A on the IN pin, using the same power-stage FETs under reverse-conversion operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.2 V to 13.2 V - Supports 5-V USB and 12-V USB PD inputs with 30-V absolute max rating and OVP at 14 V. |
| Max Charge Current | 3 A - Delivered with ±5% accuracy above 1 A; enables full charge of 4000-mAh battery in ~1.5 hours. |
| Battery Regulation Accuracy | ±0.7% (0°C to 85°C) - Ensures precise 4.2-V or programmable 3.5–4.44-V termination for cell longevity and safety compliance. |
| Power-Path RON | 17 mΩ - Minimizes voltage drop between BAT and SYS, allowing battery to supplement system load without significant loss. |
| TS Pin Thresholds | 4 JEITA thresholds - Enables full cold/cool/normal/warm/hot zone battery temperature monitoring via resistor-divider network. |
| I²C Interface | Standard-mode (100 kHz) - Allows dynamic configuration of charge voltage, current, termination, DPM threshold, and thermal limits. |
| Thermal Regulation | Activates at 125°C - Linearly reduces input current to hold die temperature, preventing thermal runaway without shutdown. |
Pinout & Package
Package: 4-mm × 4-mm, 24-pin VQFN (RGE) with exposed thermal pad connected to PGND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | DC Input Supply | Accepts 4.2–13.2 V adapter or USB source; bypassed with ≥4.7 µF ceramic capacitor to PGND. |
| BAT | Battery Connection | Direct connection to Li-ion cell anode; requires ≥1 µF local ceramic bypass for stability and transient response. |
| SYS | System Power Rail Sense | Monitors system output voltage; enables power-path FET control to maintain regulated SYS even during battery depletion. |
| TS | JEITA NTC Monitor Input | Analog input for thermistor divider; provides four configurable temperature thresholds for safe charging envelope enforcement. |
| SDA/SCL | I²C Data/Clock | Two-wire interface for real-time programming of charge parameters, fault reporting, and status readback. |
| INT/STAT | Open-Drain Status Outputs | INT signals faults via 128-µs pulses; STAT pulls low during active charging-usable for LED or host interrupt. |
| PGND | Power Ground | Primary return path for high-current paths (IN→SW→BAT/SYS); must connect to thermal pad and PCB ground plane. |
| BOOT | High-Side Gate Driver Supply | 0.033 µF capacitor from BOOT to SW supplies gate drive for internal high-side MOSFET. |
Key Features
| Feature | Design Value |
|---|---|
| Charge Time Optimizer (CTO) | Accelerates CC-to-CV transition by dynamically adjusting charge current profile-reducing total charge time by up to 20% for 4000-mAh cells at 2-A rate. |
| Integrated Power-Path FET | 17-mΩ RON enables seamless system power sourcing from battery or adapter-no external OR-ing FET required. |
| USB-OTG Boost Mode | Configurable 5-V/1-A output on IN pin using same power stage-eliminates need for separate boost IC in portable accessories. |
| I²C Programmability | Full control over charge voltage (3.5–4.44 V), input current limit (100 mA–2.5 A), termination threshold (50–200 mA), and DPM threshold (4.2–11.6 V). |
| JEITA Thermistor Monitoring | Four independent voltage thresholds on TS pin allow precise mapping to battery temperature zones-ensuring charge suspension outside safe operating range. |
Applications
| Smartphones | Tablets |
|---|---|
Use Scenario: Compact handheld with dual-power requirement (system + battery) and USB-C OTG support. IC Role / Device Role / Timing Role: Single-chip power manager handling AC/USB input, Li-ion charging, system rail regulation, and bidirectional OTG power delivery. Use Value: Eliminates discrete power-path and boost ICs-reducing BOM count by ≥3 components and PCB area by >30 mm². | Use Scenario: 7–10 inch tablet requiring fast charging, runtime extension via battery supplement, and peripheral power via OTG. IC Role / Device Role / Timing Role: Primary battery charger and system power arbiter with thermal-aware current limiting and adaptive DPM. Use Value: Maintains stable 3.5-V minimum SYS voltage during heavy CPU/GPU load-even as battery depletes below 3.0 V. |
| Power Banks | Portable Media Players |
Use Scenario: Dual-role portable charger supporting both input charging (from wall/USB) and output boosting (to phone/laptop). IC Role / Device Role / Timing Role: Bidirectional power controller managing charge/discharge paths with integrated 6-A discharge capability (BQ24261M variant). Use Value: Enables 5-V/1-A OTG output without secondary boost converter-cutting bill-of-materials cost and improving efficiency by 8–10%. | Use Scenario: Battery-powered audio/video player with strict thermal constraints and long runtime requirements. IC Role / Device Role / Timing Role: Precision Li-ion charger with JEITA-compliant temperature supervision and low-quiescent 77-µA Hi-Z mode. Use Value: Extends shelf life and cycle count by enforcing 0°C–45°C charge window and reducing parasitic drain during storage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single-cell Li-ion charger applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ24261MRTWR | Same RGE package but rated for 6-A discharge current (vs. 3-A for BQ24261MRGER); tighter VBATREG accuracy (±1.6% vs. ±2.5%) | Required where battery must supply >3 A to system during adapter disconnect (e.g., high-power portable tools) | Select BQ24261MRTWR only if ≥6-A discharge capability is mandatory; otherwise BQ24261MRGER suffices for ≤3-A loads. |
| BQ24262RGER | Lower 6.5-V OVP threshold (vs. 14 V); fixed 4.2-V charge voltage (non-programmable); no D+/D− detection | Suitable for cost-sensitive, USB-only designs without 12-V input or I²C configurability needs | Choose BQ24262RGER only when input is strictly 5-V USB and firmware-level charge parameter tuning is unnecessary. |
Compared with BQ24261MRGER, BQ24261MRTWR offers higher discharge headroom and tighter regulation for demanding power-bank use cases, while BQ24262RGER trades programmability and input voltage range for lower unit cost in fixed-configuration USB chargers.
Availability
BQ24261MRGER is available at Aetrix Electronics and suitable for smartphones, tablets, and portable media players requiring stable component supply, long-term lifecycle support, and qualified automotive-grade alternatives for industrial embedded systems.
Supply support for BQ24261MRGER includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor company specializing in analog and embedded processing technologies, with leadership in power management ICs for portable and industrial applications.
The bq2426x product line was designed for space-constrained, high-efficiency Li-ion charging in consumer electronics-integrating power-path management, USB-OTG, and JEITA-compliant thermal control in minimal footprint packages.
FAQ
What is the maximum input voltage rating for the BQ24261MRGER?
The BQ24261MRGER has an absolute maximum input voltage rating of 30 V, with overvoltage protection (OVP) triggering at 14 V nominal for the BQ24261 variant. This allows safe operation from 5-V USB and 12-V USB Power Delivery sources while protecting against transient surges. The device remains functional across its recommended 4.2-V to 13.2-V input range, and the 30-V rating ensures robustness against line spikes. Always verify layout practices to minimize switching noise on IN and SW pins per TI's SLUSBU4E datasheet section 8.3.
Does the BQ24261MRGER support USB On-The-Go (OTG) functionality?
Yes, the BQ24261MRGER supports USB OTG by configuring the device to boost battery voltage to 5 V at up to 1 A on the IN pin. This is achieved using the same internal power-stage FETs in reverse-conversion mode, eliminating the need for a separate boost IC. OTG mode is enabled via I²C register setting and requires proper output capacitance (≥10 µF) on IN. The BQ24261MRGER datasheet confirms this capability in Section 1, Features, and Section 3, Description, under "Boost Capability to Supply 5 V at 1 A at IN for USB OTG Supply."
What package type and pin count does the BQ24261MRGER use?
The BQ24261MRGER uses a 4-mm × 4-mm, 24-pin VQFN package (RGE) with an exposed thermal pad connected to PGND. This package is distinct from the 36-pin DSBGA (YFF) option used by other members of the bq2426x family. Pin functions-including IN, BAT, SYS, TS, SDA, SCL, INT, STAT, and PGND-are documented in Section 7 ("Pin Configuration and Functions") of the SLUSBU4E datasheet. Thermal pad soldering is mandatory for reliable thermal performance and electrical grounding.
How does the Charge Time Optimizer (CTO) feature improve charging performance in the BQ24261MRGER?
The Charge Time Optimizer (CTO) in the BQ24261MRGER accelerates the transition from constant-current (CC) to constant-voltage (CV) charging by dynamically adjusting the charge current profile based on real-time battery impedance and voltage response. As shown in the charge-cycle graph in the datasheet (Figure 1), CTO reduces total charge time for a 4000-mAh battery at 2-A rate by up to 20% versus traditional chargers. This is achieved without compromising safety or cell longevity, as CTO operates within JEITA thermal limits and maintains strict voltage regulation accuracy (±0.7%).
Is the BQ24261MRGER suitable for new designs given its "Not Recommended for New Designs" status?
Although the BQ24261MRGER is marked "Not Recommended for New Designs" in TI's documentation, it remains fully supported with active manufacturing, published datasheets (SLUSBU4E, Rev E), and availability through authorized distributors. This designation reflects TI's recommendation to adopt newer platforms (e.g., bq256xx series) for enhanced integration or efficiency-but does not indicate obsolescence. For legacy compatibility, cost-sensitive production, or applications already validated with BQ24261MRGER, it remains a viable, qualified solution with guaranteed supply continuity through Aetrix Electronics' lifecycle management program.
BQ24261MRGER Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Battery Chemistry:
- Lithium Ion
- Number of Cells:
- 1
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- Current
- Fault Protection:
- Over Temperature, Over Voltage
- Charge Current - Max:
- 3A
- Battery Pack Voltage:
- 3.5V
- Voltage - Supply (Max):
- 13.2V
- Interface:
- I2C
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-VQFN (4x4)
BQ24261MRGER FAQ
1.How can I place an order for BQ24261MRGER through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ24261MRGER on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for BQ24261MRGER reliable?
The price and inventory of BQ24261MRGER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ24261MRGER is usually 5 days.
3.What payment methods are accepted for BQ24261MRGER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ24261MRGER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ24261MRGER?
BQ24261MRGER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ24261MRGER order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for BQ24261MRGER?
For technical support, including BQ24261MRGER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ24261MRGER requirements.
6.How does Aetrix verify that BQ24261MRGER is sourced from the original manufacturer or authorized distributors?
All BQ24261MRGER products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BQ24261MRGER meets industry standards.
7.What is the process for return or replacement of BQ24261MRGER?
All BQ24261MRGER units undergo pre-shipment inspection (PSI). If there is an issue with BQ24261MRGER, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The BQ24261MRGER part is unused and in its original packaging.
Return procedure for BQ24261MRGER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BQ24261MRGER Tags
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BQ21040DBVR
Texas Instruments
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