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Texas Instruments BQ21080YBGR
- Part No.:
- BQ21080YBGR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Chargers
- Package:
- 8-XFBGA, DSBGA
- Datasheet:
-
BQ21080YBGR.pdf
- Description:
- 800-MA LI-ION AND LIFEPO4 IC PRO
- Quantity:
- Payment:
- Shipping:
Inventory:6,336
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Product details
Overview
BQ21080YBGR from Texas Instruments is an I²C-controlled, single-cell linear battery charger IC with integrated power path management, 800-mA charge current capability, 3.0–5.9-V input range, and ultra-low 30-nA shutdown quiescent current-designed for space-constrained wearable devices requiring ship mode and battery-to-battery charging.
For engineers reviewing the BQ21080YBGR datasheet, BQ21080YBGR pinout, BQ21080YBGR application, or BQ21080YBGR equivalent, this page delivers verified technical context, precise pin functions, real-world use cases in TWS headsets and smart glasses, and validated alternative options for low-IQ Li-ion charging solutions.
Technical Context
The BQ21080YBGR implements a dual-loop linear charging architecture with independent constant-current (CC) and constant-voltage (CV) regulation, dynamically managed by VINDPM (input voltage DPM) and DPPM (system voltage DPM) feedback loops. It supports JEITA-compliant NTC thermistor monitoring via TS/MR pin and programmable battery regulation voltage (3.6–4.65 V, ±0.5%) with 10-mV steps.
Power path operation enables seamless system power sourcing from either IN or BAT, with regulated SYS output (4.4–4.9 V), configurable input current limit (50–1050 mA), and up to 2.5-A pulsed discharge capability. Ship mode activation requires ≥5-s button press on TS/MR, reducing battery drain to 30 nA while retaining wake-on-button functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Charge Current | Configurable 5–800 mA; enables flexible fast-charge tuning for small Li-ion cells without external sense resistors. |
| Battery Regulation Voltage | 3.6–4.65 V in 10-mV steps, ±0.5% accuracy; supports Li-ion and LiFePO₄ chemistries with precise CV control. |
| Input Voltage Range | 3.0–5.9 V operating; withstands 25-V absolute max transients-ideal for USB adapter and battery-to-battery charging. |
| Quiescent Current | 30 nA in Shutdown, 3.2 µA in Ship mode; extends shelf life and enables multi-year battery storage in wearables. |
| Power Path SYS Output | Regulated 4.4–4.9 V or battery-tracking mode; powers system loads up to 2.5 A peak while charging. |
| Battery FET RON | 55 mΩ typical; minimizes thermal rise during 800-mA charging and reduces PCB heat dissipation needs. |
| Thermal Protection | Junction regulation at 100°C (configurable), shutdown at 150°C rising / 135°C falling; prevents thermal runaway in sealed enclosures. |
Pinout & Package
Package: 8-ball DSBGA (YBG), 1.6 mm × 1.1 mm, 0.4-mm pitch - compatible with standard PCB fabrication (no HDI required).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | DC Input Power Supply | Accepts 3.0–5.9-V source; bypassed with ≥1-µF ceramic capacitor; tolerates 25-V transients. |
| SYS | Regulated System Output | Provides stable 4.4–4.9 V (or battery-tracking) to system load; supports 2.5-A pulsed discharge. |
| BAT | Battery Connection | Direct connection to Li-ion/LiFePO₄ cell anode; bypassed with ≥1-µF ceramic capacitor. |
| GND | Ground Reference | Common return for all power and signal paths; must connect to low-impedance ground plane. |
| SCL / SDA | I²C Interface | Standard bidirectional I²C bus (1.8-V or 3.3-V logic); enables full configuration of charge parameters and status reads. |
| /INT | Open-Drain Fault Interrupt | Signals faults (OVP, UVLO, thermal, short) with 128-µs active-low pulse; pulled up externally (1–20 kΩ). |
| TS/MR | NTC Thermistor Input / Manual Reset | Dual-function pin: monitors battery temperature (JEITA) or triggers Ship mode/reset via momentary push-button. |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic Power Path Management | Automatically prioritizes system load over charging when input power is limited-enables uninterrupted operation during weak-adapter conditions. |
| Programmable Ship Mode | Reduces battery leakage to 30 nA via 5-s button press; retains wake capability without external circuitry or firmware intervention. |
| Integrated JEITA NTC Monitoring | Four configurable temperature thresholds (Cold/Cool/Warm/Hot) with ±0.05-V entry/exit hysteresis-supports safe charging across -20°C to +60°C ambient. |
| Robust Fault Protection Suite | Covers VIN_OVP (5.7 V), VBUVLO (configurable down to 2.0 V), BATSC, BATOCP, thermal regulation, watchdog timer, and system short protection. |
| Ultra-Low IQ Sleep Modes | 45-µA input adapter IQ, 4-µA battery-only IQ, and 3.2-µA Ship mode-minimizes standby drain in always-on wearables. |
Applications
| TWS Headset Charging Case | Smart Glasses Power Management |
|---|---|
Use Scenario: Compact charging case supplies power to left/right earbuds while simultaneously recharging its own battery from USB. IC Role / Device Role: Linear charger with power path ensures system (case MCU/display) remains powered during battery recharge. Use Value: Eliminates need for separate LDO or buck converter; 800-mA charge current fully recharges 200-mAh case battery in <2.5 hours. |
Use Scenario: AR glasses require continuous low-power operation and rapid battery top-up between brief usage sessions. IC Role / Device Role: Regulated SYS output powers display driver and sensors; battery charging occurs in background without system interruption. Use Value: 30-nA shutdown and 3.2-µA Ship mode extend shelf life >12 months; DPPM prevents brownout during high-current display bursts. |
| Smart Watch Battery System | Retail Payment Terminal |
Use Scenario: Wearable watch uses coin-cell-sized Li-ion battery and must survive weeks on single charge with periodic USB top-ups. IC Role / Device Role: Single-chip solution handles charging, system power routing, thermal safety, and button-initiated ship mode. Use Value: 55-mΩ BAT FET and 4.5-V SYS regulation minimize voltage drop across internal resistance-preserving runtime under load. |
Use Scenario: Portable card reader operates from internal battery but must accept USB-C charging without disrupting transaction processing. IC Role / Device Role: Power path isolates charging circuit from system rail; /INT pin alerts host MCU of overvoltage or thermal fault in real time. Use Value: 25-V input tolerance protects against USB-C adapter surges; configurable termination current (0.5–100 mA) avoids overcharge in field-deployed units. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar linear battery charging applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ25120AYFFT | Higher 1.2-A charge current; integrated 3-MHz boost converter; 1.2-µA Ship mode (vs. 3.2 µA); no DPPM support. | Better suited for systems needing system rail boosting (e.g., BLE radio wake-up); less optimal for pure low-IQ battery-to-battery charging. | Select BQ25120AYFFT if boost conversion is required; otherwise BQ21080YBGR offers lower Ship mode IQ and superior DPPM for load-sensitive wearables. |
| MP2662GQZ | 800-mA linear charger; 1.5-µA Ship mode; no I²C interface (pin-strapped only); no JEITA NTC support; 125°C thermal shutdown. | Targeted at cost-sensitive, fixed-parameter designs where configurability and thermal safety margins are secondary. | Choose MP2662GQZ for simplified BOM and fixed-configuration production; BQ21080YBGR provides full I²C control, JEITA compliance, and tighter thermal regulation. |
Compared with BQ25120AYFFT and MP2662GQZ, the BQ21080YBGR uniquely balances ultra-low Ship mode current (3.2 µA), full I²C programmability, JEITA NTC support, and robust DPPM-making it the preferred choice for premium wearables demanding long shelf life and adaptive charging behavior.
Availability
BQ21080YBGR is available at Aetrix Electronics and suitable for TWS headset charging cases, smart glasses, smart watches, retail payment terminals, and building automation sensors requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for BQ21080YBGR 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 leadership in battery management ICs and power management innovation.
The BQ21080YBGR belongs to TI's BQ21xxx ultra-low-quiescent-current linear charger family, designed specifically for space- and power-constrained portable electronics where extended battery shelf life and seamless power path operation are critical.
FAQ
What is the minimum input voltage required to initiate charging on the BQ21080YBGR?
The BQ21080YBGR begins charging when input voltage rises above 3.0 V (VIN_LOWV threshold). Below this, the device remains in sleep mode. The input undervoltage lockout (VIN_UVLO) exits at 3.0 V (rising) and re-engages at 2.7 V (falling), ensuring stable startup. This 3.0-V minimum supports battery-to-battery charging from partially discharged sources, a key requirement for TWS charging cases using the BQ21080YBGR.
How does the BQ21080YBGR handle thermal regulation during high-current charging?
The BQ21080YBGR implements junction temperature regulation at 100°C (configurable via register), reducing charge current to maintain safe die temperature. If temperature exceeds 150°C, thermal shutdown activates and disables all FETs. The device also features thermal regulation hysteresis and supports JEITA-compliant NTC monitoring via the TS/MR pin-ensuring safe charging across ambient temperatures from -20°C to +60°C in compact enclosures using the BQ21080YBGR.
Can the BQ21080YBGR be used with LiFePO₄ batteries?
Yes-the BQ21080YBGR supports LiFePO₄ chemistry through programmable battery regulation voltage down to 3.6 V (with 10-mV steps) and configurable precharge/termination thresholds. Its 3.6–4.65-V VBATREG range covers the typical 3.6-V nominal voltage of LiFePO₄ cells. The BQ21080YBGR's JEITA NTC monitoring and adjustable VLOWV further enable safe, temperature-aware charging profiles tailored to LiFePO₄ characteristics.
What is the role of the TS/MR pin on the BQ21080YBGR beyond NTC monitoring?
The TS/MR pin serves dual roles: as an NTC thermistor input for JEITA temperature profiling, and as a manual reset / ship mode trigger. Holding TS/MR low for ≥5 seconds (tLPRESS) enters Ship mode, reducing battery drain to 30 nA. A shorter press (tWAKE1/tWAKE2) wakes the device. This eliminates need for external reset ICs or dedicated ship-mode circuitry-simplifying design and saving board space in devices using the BQ21080YBGR.
Does the BQ21080YBGR support automatic recharge after termination?
Yes-the BQ21080YBGR supports automatic recharge via the VRCH (recharge threshold) function. After charge termination, if battery voltage drops below the programmed VRCH level (75–230 mV below regulation voltage), the device restarts charging. This hysteresis prevents cycling near full charge and maintains battery health. The VRCH threshold is configurable via I²C, and the BQ21080YBGR implements this behavior without host MCU intervention.
BQ21080YBGR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-XFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Battery Chemistry:
- Multi-Chemistry
- Number of Cells:
- 1
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- Current, Timer, Voltage
- Fault Protection:
- Over Current, Over Temperature, Over-Under Voltage, Short Circuit
- Charge Current - Max:
- 800mA
- Battery Pack Voltage:
- 2.2V ~ 4.6V
- Voltage - Supply (Max):
- 5.5V
- Interface:
- I2C
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DSBGA (1.6x1.1)
BQ21080YBGR FAQ
1.How can I place an order for BQ21080YBGR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ21080YBGR 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 BQ21080YBGR reliable?
The price and inventory of BQ21080YBGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ21080YBGR is usually 5 days.
3.What payment methods are accepted for BQ21080YBGR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ21080YBGR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ21080YBGR?
BQ21080YBGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ21080YBGR 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 BQ21080YBGR?
For technical support, including BQ21080YBGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ21080YBGR requirements.
6.How does Aetrix verify that BQ21080YBGR is sourced from the original manufacturer or authorized distributors?
All BQ21080YBGR 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 BQ21080YBGR meets industry standards.
7.What is the process for return or replacement of BQ21080YBGR?
All BQ21080YBGR units undergo pre-shipment inspection (PSI). If there is an issue with BQ21080YBGR, 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 BQ21080YBGR part is unused and in its original packaging.
Return procedure for BQ21080YBGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BQ21080YBGR Tags
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Texas Instruments
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