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Texas Instruments BQ24161BRGET
- Part No.:
- BQ24161BRGET
- Manufacturer:
- Texas Instruments
- Category:
- Battery Chargers
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
BQ24161BRGET.pdf
- Description:
- IC BATT CHG LI-ION 1CELL 24VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:383
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Product details
Overview
BQ24161BRGET from Texas Instruments is a 2.5-A dual-input switched-mode Li-ion battery charger with integrated power path management and I²C programmability. It supports simultaneous system power delivery and battery charging, delivers ±1% battery voltage regulation accuracy and ±10% charge current accuracy, and operates from either USB (up to 1.5 A) or IN (up to 2.5 A) inputs with 10.5-V OVP. It enables instant system startup even with a deeply discharged or absent battery in portable media players.
For engineers reviewing the BQ24161BRGET datasheet, BQ24161BRGET pinout, BQ24161BRGET application, or BQ24161BRGET equivalent, key selection considerations include its VQFN-24 package, JEITA-compatible NTC monitoring, I²C-configurable charge parameters, dual-input isolation, and power path architecture enabling system operation without battery dependency.
Technical Context
The BQ24161BRGET implements a synchronous buck converter with internal high-side and low-side N-channel MOSFETs (RDS(on) ≤ 110 mΩ and ≤ 115 mΩ respectively) and an external P-channel discharge FET driven by BGATE. Its power path separates SYS output regulation from battery charging, allowing independent control of system voltage (3.7 V nominal, adjustable via VMINSYS) and charge termination (ITERM programmable down to 50 mA).
Input selection is managed via I²C register control or hardware PSEL pin (logic-high = 100 mA USB limit; logic-low = 1.5 A), with full electrical isolation between USB and IN paths. The device integrates thermal regulation (120°C throttle start), safety timers, and dual overvoltage protection (6.5 V for USB, 10.5 V for IN), all verified per SLUSAO0H Rev H (July 2022).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Charge Current | Up to 2.5 A continuous - supports fast charging of high-capacity single-cell Li-ion batteries in space-constrained devices. |
| Battery Regulation Accuracy | ±1% - ensures precise 3.5–4.44 V charge voltage setting, critical for cell longevity and safety compliance. |
| Input Voltage Ranges | USB: 4.2–6 V; IN: 4.2–10 V - accommodates standard USB ports and AC adapters while enforcing 10.5-V OVP on IN. |
| Power Path Output | SYS regulated at 3.7 V (±0.12 V) - powers system load independently of battery state, enabling boot with 0-V battery. |
| I²C Interface | Standard-mode (100 kHz) - enables dynamic configuration of charge current, voltage, safety timers, and NTC thresholds in-system. |
| NTC Monitoring | JEITA-compliant 4-threshold detection (VHOT/VWARM/VCOOL/VCOLD) - supports safe charging across extended temperature ranges. |
| Package | VQFN-24 (4 mm × 4 mm) - thermally enhanced surface-mount package with exposed thermal pad tied to PGND. |
Pinout & Package
Package: VQFN-24 (4.00 mm × 4.00 mm), RoHS-compliant, with exposed thermal pad electrically connected to PGND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 21) | High-power input supply connection | Accepts 4.2–10 V DC (AC adapter/wireless charging); bypassed to PGND with ≥1 μF ceramic capacitor. |
| USB (Pin 22) | USB input supply connection | Accepts 4.2–6 V DC (USB port); isolated from IN path; supports D+/D− detection only on BQ24160/3 variants. |
| PSEL (Pin 2) | USB source detection select | Hardware-selectable USB current limit: high = 100 mA (BQ24161), low = 1.5 A - no effect on IN path. |
| BAT (Pins 11,12) | Battery terminal interface | Connects to Li-ion cell anode; requires ≥1 μF local bypass; monitors battery voltage and short-circuit (VBATSHRT = 2.0 V). |
| SYS (Pins 13,14) | System power rail sense and FET connection | Feedback point for system regulation; connects to bulk output capacitors (≥10 μF recommended); enables supplement mode when VBAT > VSYS. |
| SW (Pin 18) | Switch node | Drives external inductor; carries high-frequency PWM current; must be routed with minimal loop area for EMI control. |
| PGND (Pins 5,15–17) | Power ground reference | Primary return path for high-current switching; thermally coupled to exposed pad; must be solidly connected to PCB ground plane. |
| SCL/SDA (Pins 3,4) | I²C serial interface | Configures charge parameters, reads status registers, and reports faults; pulled up externally (10 kΩ typical). |
Key Features
| Feature | Design Value |
|---|---|
| Independent Power Path Management | Enables system operation from input supply while charging battery - eliminates boot delay and supports dead-battery recovery. |
| Dual Isolated Input Architecture | USB and IN inputs are fully decoupled; selection via I²C or PSEL avoids cross-conduction and simplifies source arbitration logic. |
| Programmable Safety Timers & Termination | Charge timeout, ITERM (50–500 mA), and VRCH (120 mV) configurable via I²C - ensures robust end-of-charge control under varying battery conditions. |
| JEITA-Compatible NTC Monitoring | Four precision voltage thresholds (VHOT/VWARM/VCOOL/VCOLD) referenced to DRV - enables compliant charging profiles without external comparators. |
| Thermal Regulation & Protection | Active current throttling begins at 120°C; thermal shutdown at 165°C with 10°C hysteresis - maintains reliability in sealed portable enclosures. |
Applications
| Portable Media Players | Handheld Industrial Scanners |
|---|---|
|
Use Scenario: Compact audio/video player with 2000–3000 mAh Li-ion battery, requiring rapid recharge from USB-C and uninterrupted playback during charging. IC Role / Device Role / Timing Role: Single-chip power manager handling input arbitration, battery charge control, and system rail regulation with zero downtime. Use Value: Enables instant-on functionality and runtime extension via power path - user experiences no interruption when plugging in USB for charge. |
Use Scenario: Rugged handheld barcode scanner used in warehouse environments, operating 8+ hours per charge and recharged via cradle or USB. IC Role / Device Role / Timing Role: Dual-input charger with thermal regulation and NTC monitoring ensures safe charging across ambient temperatures from –20°C to 60°C. Use Value: JEITA compliance prevents charging below 0°C or above 45°C - extends battery cycle life and avoids field failures in uncontrolled environments. |
| Smart POS Terminals | Portable Medical Monitors |
|
Use Scenario: Battery-backed point-of-sale terminal with always-on connectivity, requiring reliable backup power and hot-swap capability during merchant shifts. IC Role / Device Role / Timing Role: Power path controller maintaining stable 3.7 V SYS rail while managing 2.5-A fast charge - supports seamless battery replacement. Use Value: Eliminates need for external OR-ing FETs or supervisor ICs - reduces BOM count and PCB area in cost-sensitive retail hardware. |
Use Scenario: Portable ECG or SpO₂ monitor used in clinical and home settings, needing FDA-aligned battery safety, low standby leakage, and accurate SoC estimation. IC Role / Device Role / Timing Role: Precision charger with ±1% VBATREG and ±10% ICHARGE accuracy - provides stable reference for fuel-gauge ICs like BQ27530. Use Value: Tight regulation tolerance directly improves battery remaining capacity calculation - enhances clinician trust in displayed runtime estimates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single-cell Li-ion battery charging applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ24163RGET | Same VQFN-24 package; includes D+/D− USB detection (vs. PSEL on BQ24161); lower VMINSYS (3.2 V) and VBATSHRT (2.0 V). | Preferred where automatic USB adapter identification is required and lower system cutoff voltage is acceptable. | Select BQ24163RGET if D+/D− handshake is needed and design can tolerate reduced minimum system voltage. |
| BQ24161BRGER | Identical functionality and pinout; differs only in tape-and-reel packaging (250 vs. 3000 units/reel) and moisture sensitivity level (MSL 2 vs. MSL 3). | No functional difference; suitable for low-volume prototyping or small-batch production where reel size matters. | Choose BQ24161BRGER for evaluation or pilot runs; BQ24161BRGET remains optimal for volume manufacturing. |
Compared with BQ24163RGET and BQ24161BRGER, the BQ24161BRGET offers hardware-based USB current selection via PSEL - reducing firmware dependency - and higher VMINSYS (3.5 V), improving system stability during low-battery conditions.
Availability
BQ24161BRGET is available at Aetrix Electronics and suitable for portable media players, handheld industrial scanners, and smart POS terminals requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for BQ24161BRGET 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 leader specializing in analog and embedded processing technologies, with decades of expertise in battery management ICs and power conversion solutions.
The BQ24161 belongs to TI's BQ2416x family of highly integrated Li-ion chargers designed specifically for space-constrained portable electronics requiring dual-input flexibility, power path independence, and I²C configurability.
FAQ
What is the maximum input voltage rating for BQ24161BRGET on the IN pin?
The BQ24161BRGET supports a maximum input voltage of 10.5 V on the IN pin, with overvoltage protection (OVP) triggering at 10.3–10.7 V. This rating applies specifically to the BQ24161 variant and is distinct from the 6.5-V USB OVP threshold. Exceeding 10.5 V risks permanent damage, as confirmed in Section 7.1 Absolute Maximum Ratings of the SLUSAO0H datasheet.
Does BQ24161BRGET support JEITA-compliant battery temperature monitoring?
Yes, the BQ24161BRGET supports JEITA-compliant NTC monitoring with four precise thresholds (VHOT, VWARM, VCOOL, VCOLD) referenced to the DRV rail. This functionality is explicitly enabled for BQ24161 in Table 5 Device Comparison and detailed in Section 7.5 Electrical Characteristics. It allows safe charging suspension outside 0°C–45°C without external circuitry.
What package type and dimensions does BQ24161BRGET use?
The BQ24161BRGET uses the VQFN-24 package with nominal body dimensions of 4.00 mm × 4.00 mm and an exposed thermal pad. This is confirmed in the Device Information table and Figure 6-1 of the SLUSAO0H datasheet. The 'RGET' suffix denotes the 4-mm VQFN variant, distinguishing it from the 2.8-mm DSBGA option used in other BQ2416x variants.
How does the power path architecture of BQ24161BRGET enable system operation with no battery?
The BQ24161BRGET's power path architecture uses a dedicated DC-DC converter to regulate the SYS rail independently of the battery. When no battery is present or it is deeply discharged, the IC routes input power (USB or IN) directly to SYS while keeping the battery FET off. This is documented in Section 3 Description and enables instant system turn-on - a core feature validated in application schematics.
Can BQ24161BRGET be configured to limit USB input current to 100 mA at startup?
Yes, the BQ24161BRGET supports 100-mA USB current limiting at startup via the PSEL pin: driving PSEL high configures USB100 mode. This behavior is specified in the Device Comparison Table and Pin Functions section for BQ24161. Unlike BQ24160/3, it does not use D+/D− detection - PSEL is the sole hardware method for USB current selection on this variant.
BQ24161BRGET Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- 1
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- -
- Fault Protection:
- Over Temperature, Over Voltage
- Charge Current - Max:
- 2.5A
- Battery Pack Voltage:
- 3.7V
- Voltage - Supply (Max):
- 10V
- Interface:
- I2C
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-VQFN (4x4)
BQ24161BRGET FAQ
1.How can I place an order for BQ24161BRGET through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ24161BRGET 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 BQ24161BRGET reliable?
The price and inventory of BQ24161BRGET are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ24161BRGET is usually 5 days.
3.What payment methods are accepted for BQ24161BRGET?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ24161BRGET transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ24161BRGET?
BQ24161BRGET orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ24161BRGET 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 BQ24161BRGET?
For technical support, including BQ24161BRGET datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ24161BRGET requirements.
6.How does Aetrix verify that BQ24161BRGET is sourced from the original manufacturer or authorized distributors?
All BQ24161BRGET 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 BQ24161BRGET meets industry standards.
7.What is the process for return or replacement of BQ24161BRGET?
All BQ24161BRGET units undergo pre-shipment inspection (PSI). If there is an issue with BQ24161BRGET, 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 BQ24161BRGET part is unused and in its original packaging.
Return procedure for BQ24161BRGET:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BQ24161BRGET Tags
-
BQ21040DBVR
Texas Instruments
-
MCP73812T-420I/OT
Microchip Technology
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MCP73831T-2ACI/OT
Microchip Technology
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MCP73832T-2ACI/OT
Microchip Technology
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MCP73831T-2DCI/OT
Microchip Technology
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MCP73832T-2DCI/OT
Microchip Technology
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MCP73831T-2ATI/OT
Microchip Technology
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MCP73832T-2ATI/OT
Microchip Technology
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MCP73831T-5ACI/OT
Microchip Technology
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MCP73832T-2ACI/MC
Microchip Technology
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MCP73831T-2ACI/MC
Microchip Technology
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MCP73831T-2ATI/MC
Microchip Technology
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