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Texas Instruments BQ29330DBTRG4
- Part No.:
- BQ29330DBTRG4
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 30-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
BQ29330DBTRG4.pdf
- Description:
- IC BATT PROT LI-ION 2-4C 30TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,176
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Product details
Overview
BQ29330DBTRG4 from Texas Instruments is a 2- to 4-series lithium-ion/polymer battery protection analog front-end (AFE) IC with integrated 2.5-V/16-mA and 3.3-V/25-mA LDOs, NMOS FET gate drivers for charge/discharge/precharge control, I²C-compatible interface, and programmable overcurrent/short-circuit protection. It delivers individual cell voltage translation (0.15× scaling), 2-kB data flash, and operates from 4.5 V to 28 V supply - used in notebook battery packs requiring autonomous safety shutdown.
For engineers reviewing the BQ29330DBTRG4 datasheet, BQ29330DBTRG4 pinout, BQ29330DBTRG4 application, or BQ29330DBTRG4 equivalent, key selection considerations include its dual-LDO power architecture, 32-pin TSSOP package with verified 2-tier overcurrent detection, cell balancing drive capability via VCx pins, and support for host-initiated sleep/ship modes via UART/I²C.
Technical Context
The BQ29330DBTRG4 implements autonomous protection logic using internal comparators for overload (OL), short circuit in charge (SCC), and short circuit in discharge (SCD), each with independently programmable thresholds (50–205 mV OL, 100–475 mV SCC/SCD) and blanking delays (1–31 ms OL, 0–915 μs SCC/SCD). Its cell voltage monitor uses a delta-sigma A/D converter with calibrated gain (K = 0.150 ±0.003) and offset correction to deliver ±1% accuracy across 4 cells.
It integrates two independent LDOs: a 2.5-V regulator (±0.2% temp drift, 16-mA max) powered from LEDOUT, and a 3.3-V regulator (±0.2% temp drift, 25-mA max) powered from VCC/BAT. Both support external capacitors (CREG = 1 μF, CLED = 2.2 μF) and feature current limiting, line/load regulation, and POR/WDT supervision.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 4.5 V to 28 V - supports full Li-ion stack voltages up to 4S (16.8 V) with margin for transient spikes |
| Cell Count Support | 2-, 3-, or 4-series cells - configurable via VC1–VC5 pin connections without firmware change |
| Overcurrent Threshold | Programmable 50–205 mV (OL), 100–475 mV (SCC/SCD) - enables precise FET sizing with 5-mΩ sense resistor |
| Quiescent Current | 105–190 μA typical - ensures low self-discharge in always-on battery pack monitoring |
| Cell Voltage Accuracy | ±1% after calibration - achieved via on-chip reference (0.975 V ±1%) and gain trimming registers |
| LDO Outputs | 2.5 V @ 16 mA & 3.3 V @ 25 mA - powers external gas gauge (e.g., bq803x), LEDs, and microcontrollers |
| I²C Interface | Standard-mode (≤100 kHz), open-drain SCLK/SDATA with internal 10-kΩ pullups - enables host read/write of status, control, and calibration registers |
Pinout & Package
Package: 30-pin TSSOP (DBT), 0.65-mm pitch, body size 7.0 mm × 4.4 mm, thermal resistance θJA = 81.4°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VC1–VC5 | Cell voltage sense & balance current input | Direct connection to series cell nodes; VC1 = most positive, VC5 = most negative; internal FETs enable per-cell bypass via external resistors |
| SRP/SRN | Current sense differential input | Measures charge/discharge current direction and magnitude; supports bidirectional sensing with ±0.5 V common-mode range |
| CHG/DSG/ZVCHG | NMOS gate drive outputs | Charge pump-driven high-side gate drives (CHG/DSG = 7.5–15.5 V above source); ZVCHG controls precharge P-FET |
| REG/LEDOUT | Regulated power outputs | REG = 2.5 V for internal logic and peripherals; LEDOUT = 3.3 V for display backlight or external IC bias |
| SCLK/SDATA/XALERT | I²C-compatible serial interface | Open-drain bus signals with internal pullups; XALERT asserts low on fault or register change for host interrupt |
Key Features
| Feature | Design Value |
|---|---|
| Programmable 2-tier overcurrent protection | Independent OL, SCC, and SCD thresholds/delays allow staged response: soft shutdown for overload, hard cutoff for shorts |
| Calibrated cell voltage translation | 0.15× scaling with on-chip 0.975-V reference and register-based gain/offset correction yields ±1% measurement accuracy |
| Dual integrated LDOs | 2.5-V/16-mA and 3.3-V/25-mA regulators eliminate need for external power supplies in compact battery packs |
| Host-controlled power modes | Sleep (50 μA), ship (1 μA), and normal modes enable dynamic power optimization based on system state |
| Cell balancing drive | Internal FETs with 400-Ω RDS(on) support up to 10 mA bypass current per cell using external 500–1 kΩ resistors |
Applications
| Notebook Battery Packs | Medical Portable Devices |
|---|---|
Use Scenario: Multi-cell Li-ion battery pack in ultrabook with embedded fuel gauge and thermal management. IC Role / Device Role / Timing Role: Primary protection AFE providing real-time cell voltage, current, and temperature monitoring while enforcing UL2054-compliant shutdown. Use Value: Enables autonomous overvoltage/undervoltage/cell imbalance protection without host CPU intervention, reducing firmware complexity and failure risk. | Use Scenario: Rechargeable battery module in portable ECG monitor requiring long shelf life and medical-grade safety compliance. IC Role / Device Role / Timing Role: Safety supervisor that enters ultra-low-power ship mode (0.1–1 μA) during storage and wakes on PACK voltage rise. Use Value: Extends shelf life by minimizing self-discharge; certified thermal fault response meets IEC 60601-1 leakage and isolation requirements. |
| Industrial Handheld Testers | High-Precision Instrumentation |
Use Scenario: Ruggedized multimeter with hot-swappable Li-ion battery and onboard calibration memory. IC Role / Device Role / Timing Role: Battery interface IC supplying regulated 2.5 V/3.3 V to ADC reference and microcontroller, while logging cell data to 2-kB data flash. Use Value: Eliminates external regulators and EEPROM; flash retention supports 100k write cycles for calibration history and usage logs. | Use Scenario: Benchtop power analyzer with 4S Li-ion backup battery maintaining real-time clock and SRAM during AC loss. IC Role / Device Role / Timing Role: Precision voltage translator feeding scaled cell voltages to host ADC with <1 mV offset error post-calibration. Use Value: Delivers ±1 mV absolute accuracy for SOC estimation - critical for energy accounting in metrology-grade equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery protection AFE applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ29312ADBTR | 2- to 3-cell only; no ZVCHG pin; 1-kB data flash; lacks 3.3-V LDO | Targeted at cost-sensitive 2S/3S packs without precharge or LED drive needs | Select when 4S support, precharge control, or dual-LDO integration are not required |
| MAX14920ETA+ | 4S-only; integrated Coulomb counter; SPI interface; higher quiescent current (250 μA) | Designed for systems needing integrated fuel gauging alongside protection | Choose when host requires direct coulomb counting and SPI compatibility outweighs I²C and lower IQ advantages |
Compared with BQ29330DBTRG4, BQ29312ADBTR reduces feature set for lower cost in simpler 2S/3S designs, while MAX14920ETA+ adds fuel-gauge functionality at the expense of higher supply current and interface compatibility - making BQ29330DBTRG4 optimal for balanced 2S–4S protection with minimal BOM count and flexible host communication.
Availability
BQ29330DBTRG4 is available at Aetrix Electronics and suitable for notebook computers, medical portable devices, industrial handheld testers, and high-precision instrumentation requiring stable component supply, long-term lifecycle support, and automotive-grade reliability validation.
Supply support for BQ29330DBTRG4 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, embedded processing, and power management technologies with over 50 years of innovation in battery management solutions.
The BQ29330DBTRG4 belongs to TI's bq29xxx family of battery protection AFEs, designed specifically for high-reliability multi-cell Li-ion/polymer packs where autonomous safety, precision cell monitoring, and minimal external components are critical.
FAQ
What is the operating temperature range for the BQ29330DBTRG4?
The BQ29330DBTRG4 is rated for functional operation from –40°C to +110°C ambient temperature, with recommended operating conditions specifying –25°C to +85°C for full electrical performance compliance. Its thermal design (θJA = 81.4°C/W) supports reliable use in sealed battery enclosures without forced airflow.
Does the BQ29330DBTRG4 support 4-series lithium-ion battery configurations?
Yes, the BQ29330DBTRG4 natively supports 2-, 3-, and 4-series lithium-ion or lithium-polymer battery configurations. Pin assignments VC1 through VC5 accommodate up to four stacked cells, and the internal cell voltage translation circuitry scales each differential cell voltage by 0.15× for accurate host-side measurement.
How does the BQ29330DBTRG4 implement cell balancing?
The BQ29330DBTRG4 provides cell balancing drive via internal N-channel FETs connected to VC1–VC5 pins, each with 400-Ω typical RDS(on). Balancing current is set by external series resistors (recommended 500 Ω–1 kΩ); the device enables one cell path at a time under host I²C command, supporting up to 10 mA per cell.
What interfaces does the BQ29330DBTRG4 support for host communication?
The BQ29330DBTRG4 supports I²C-compatible serial communication (standard-mode, ≤100 kHz) using open-drain SCLK and SDATA pins with internal 10-kΩ pullups to REG. It also provides UART-capable signals (SCLK/SDATA reconfigurable) and status alerts via XALERT - but does not include native UART PHY or HDQ/1-Wire hardware.
Can the BQ29330DBTRG4 operate without an external microcontroller?
Yes, the BQ29330DBTRG4 performs autonomous protection (overvoltage, undervoltage, overload, short-circuit) without host intervention. However, configuration, calibration, cell balancing activation, and power mode transitions require I²C commands from a host microcontroller or gas gauge like the bq803x family.
BQ29330DBTRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 30-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Function:
- Battery Protection
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- 2 ~ 4
- Fault Protection:
- Over Current, Over/Under Voltage, Short Circuit
- Interface:
- I2C
- Operating Temperature:
- -40°C ~ 110°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 30-TSSOP
BQ29330DBTRG4 FAQ
1.How can I place an order for BQ29330DBTRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ29330DBTRG4 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 BQ29330DBTRG4 reliable?
The price and inventory of BQ29330DBTRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ29330DBTRG4 is usually 5 days.
3.What payment methods are accepted for BQ29330DBTRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ29330DBTRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ29330DBTRG4?
BQ29330DBTRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ29330DBTRG4 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 BQ29330DBTRG4?
For technical support, including BQ29330DBTRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ29330DBTRG4 requirements.
6.How does Aetrix verify that BQ29330DBTRG4 is sourced from the original manufacturer or authorized distributors?
All BQ29330DBTRG4 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 BQ29330DBTRG4 meets industry standards.
7.What is the process for return or replacement of BQ29330DBTRG4?
All BQ29330DBTRG4 units undergo pre-shipment inspection (PSI). If there is an issue with BQ29330DBTRG4, 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 BQ29330DBTRG4 part is unused and in its original packaging.
Return procedure for BQ29330DBTRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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