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Texas Instruments BQ29330ADBT
- Part No.:
- BQ29330ADBT
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- -
- Datasheet:
-
BQ29330ADBT.pdf
- Description:
- IC BATT MGMT ANALOG
- Quantity:
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Inventory:1,800
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Product details
Overview
BQ29330ADBT from Texas Instruments is a 2-/3-/4-series Li-ion/Li-polymer battery protection analog front-end (AFE) IC with integrated 2.5-V/16-mA and 3.3-V/25-mA LDOs, I²C/SMBus/HDQ/UART host interface, NMOS FET gate drivers for charge/discharge/precharge control, and programmable 2-tier overcurrent protection. It delivers individual cell voltage translation (0.15× scaling), cell balancing drive, and watchdog timing for notebook battery packs.
For engineers reviewing the BQ29330ADBT datasheet, BQ29330ADBT pinout, BQ29330ADBT application, or BQ29330ADBT equivalent, this device supports precise cell-level safety monitoring in multi-cell portable power systems where programmable fault thresholds, low-quiescent-current sleep mode (30–50 μA), and integrated LDO power domains are required.
Technical Context
The BQ29330ADBT implements autonomous hardware-based protection logic for overload, short-circuit-in-charge (SCC), and short-circuit-in-discharge (SCD), with blanking delays individually configurable via registers (OLD: 1–31 ms; SCC/SCD: 0–915 μs). Its delta-sigma A/D converter enables ±1% cell voltage measurement accuracy after calibration.
It integrates dual LDOs (2.5 V @ 16 mA, 3.3 V @ 25 mA), thermistor bias (TOUT), open-drain status outputs (XALERT, GPOD, XRST), and 24K × 22 program flash + 2K RAM for firmware-defined behavior. Host communication occurs via I²C-compatible serial interface (≤100 kHz) with internal 10-kΩ pullups on SCLK/SDATA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cell Support | 2-, 3-, or 4-series Li-ion/Li-polymer stacks - enables flexible pack architecture without redesign. |
| Supply Range | 4.5 V to 28 V on VCC/BAT - accommodates full pack voltage range including 4S (≤16.8 V) and extended configurations. |
| Quiescent Current | 100 μA typical in normal mode; 30–50 μA in Sleep mode - extends shelf life and reduces standby drain. |
| Overcurrent Thresholds | Programmable OL: 50–205 mV (5-mV steps); SCC/SCD: 100–475 mV (25-mV steps) - allows precise current-sense resistor selection (e.g., 5 mΩ). |
| Cell Voltage Scaling | 0.15× linear translation (±0.003) with 0.975 V offset - maps 0–4.5 V cell differential to 0–0.975 V output for safe MCU ADC input. |
| FET Drive Outputs | CHG/DSG/ZVCHG with 8–16 V gate drive swing - directly drives external N-channel MOSFETs without level-shifting. |
| Interface Protocol | I²C-compatible (≤100 kHz), SMBus, HDQ, UART - provides host flexibility across embedded controllers and fuel gauges. |
Pinout & Package
TSSOP-30 package (DBT) with exposed thermal pad; 0.65 mm pitch; RoHS-compliant; JEDEC MO-153 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VC1–VC5 | Cell voltage sense inputs | Support 2–4 series cells; VC1 = most positive, VC5 = most negative; enable per-cell voltage translation and balancing. |
| SRP / SRN | Current sense differential pair | Measures discharge/charge current via external sense resistor; supports bidirectional sensing with polarity reversal. |
| CHG / DSG / ZVCHG | NMOS FET gate drivers | Drive external high-side precharge (ZVCHG) and low-side charge/discharge (CHG/DSG) FETs; 8–16 V swing ensures full enhancement. |
| CELL+ / CELL− | Scaled cell voltage output | Delivers 0.15× scaled, GND-referenced voltage of selected cell; compatible with 3.3 V MCU ADCs without attenuation. |
| SCLK / SDATA | I²C-compatible serial interface | Open-drain with internal 10-kΩ pullup to REG; supports host read/write of status, configuration, and cell data registers. |
| XALERT / XRST / GPOD | Open-drain status outputs | Signal fault events (XALERT), reset assertion (XRST), or general-purpose control (GPOD); each pulled up externally or internally. |
| BAT / PACK / VCC | Power domain inputs | BAT = main pack supply; PACK = alternate power source or pack+ terminal; VCC = primary regulator input; UVLO at 5.5 V. |
| REG / LEDOUT | Integrated LDO outputs | REG = 2.5 V @ 16 mA (powers internal logic & SDATA/SCLK); LEDOUT = 3.3 V @ 25 mA (powers LEDs & REG input). |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Protection Timing | Independent blanking delays for overload (1–31 ms), SCC (0–915 μs), and SCD (0–915 μs) prevent nuisance trips during transient loads. |
| Cell Balancing Drive | Internal FET switch (RDS(on) ≈ 400 Ω) enables passive balancing per cell via external resistors (500–1 kΩ), reducing voltage divergence during charging. |
| Dual LDO Power Domains | 2.5-V LDO powers internal logic and interface; 3.3-V LDO supplies LEDs and feeds 2.5-V LDO - eliminates need for external regulators. |
| Multi-Protocol Host Interface | I²C, SMBus, HDQ, and UART compatibility allows integration with TI bq803x fuel gauges or custom microcontrollers without protocol translation. |
| Low-Power Ship/Sleep Modes | Ship mode draws ≤1 μA; Sleep mode draws 30–50 μA with I²C active - preserves battery capacity during storage or idle periods. |
Applications
| Notebook Battery Pack | Medical Portable Monitor |
|---|---|
|
Use Scenario: 3S or 4S Li-ion pack powering a Windows-based ultrabook with USB-C PD charging and runtime estimation. IC Role / Device Role / Timing Role: Primary protection AFE providing real-time cell voltage, current, temperature, and fault status to host fuel gauge via I²C. Use Value: Enables accurate state-of-charge calculation and prevents unsafe operation during fast-charge cycles or high-power discharge bursts. |
Use Scenario: Rechargeable battery pack for handheld ECG or ultrasound device requiring FDA-compliant safety shutdowns. IC Role / Device Role / Timing Role: Safety-critical AFE enforcing hardware-level overvoltage, undervoltage, and overcurrent limits independent of firmware. Use Value: Guarantees fail-safe disconnection within <1 ms of SCC/SCD detection - meeting IEC 62368-1 and UL 2054 requirements. |
| Industrial Handheld Scanner | Test Equipment Battery Module |
|
Use Scenario: Ruggedized barcode scanner operating in wide ambient temperatures (–25°C to 85°C) with hot-swap battery support. IC Role / Device Role / Timing Role: Dual-role AFE managing both protection and host communication; uses TOUT for thermistor bias and XALERT for interrupt signaling. Use Value: Maintains reliable operation across temperature extremes while enabling host-triggered sleep/ship modes to extend field service life. |
Use Scenario: Modular battery pack for benchtop multimeters or oscilloscopes needing precise voltage reporting and long-term calibration stability. IC Role / Device Role / Timing Role: High-accuracy cell monitor with calibrated 0.15× scaling and ±1% post-calibration error - referenced to internal 0.975 V bandgap. Use Value: Delivers traceable cell voltage data to host controller for automated calibration logging and battery health analytics. |
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-/3-cell only; no ZVCHG pin; 1.8-V LDO instead of 2.5 V; lacks UART/HDQ support; smaller 24-pin TSSOP. | Targeted at cost-sensitive 2S/3S consumer packs without precharge or multi-protocol needs. | Select when pack size is fixed ≤3S and host interface is I²C-only; not suitable for 4S or ZVCHG-driven precharge circuits. |
| MAX14920ETA+ | 4S-only; integrated Coulomb counter; SPI-only interface; higher 200 μA quiescent current; no internal LDOs. | Designed for high-precision fuel gauging in medical/industrial tools where coulomb counting is mandatory. | Choose when absolute capacity tracking outweighs low-power operation; requires external 3.3-V supply and SPI host. |
Compared with bq29312ADBTR and MAX14920ETA+, the BQ29330ADBT uniquely supports 2–4S scalability, integrated dual-LDO power, ZVCHG precharge drive, and four host interface protocols - making it optimal for flexible, safety-certifiable, multi-vendor battery systems.
Availability
BQ29330ADBT is available at Aetrix Electronics and suitable for notebook computers, medical portable monitors, industrial handheld scanners, and test equipment battery modules requiring stable component supply across extended temperature ranges (–40°C to 110°C) and long lifecycle support.
Supply support for BQ29330ADBT 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 decades of battery management system expertise.
The BQ29330ADBT belongs to TI's bq29xxx family of high-integration battery protection AFEs, designed specifically for safety-critical, multi-cell Li-ion packs in portable computing and portable medical devices.
FAQ
What is the maximum number of series cells supported by the BQ29330ADBT?
The BQ29330ADBT supports 2-series, 3-series, or 4-series lithium-ion or lithium-polymer cells, as confirmed in its official description and functional block diagram. Pin assignments VC1 through VC5 are configured to accommodate all three topologies, with specific shorting guidelines provided for 2S and 3S configurations in the datasheet.
Does the BQ29330ADBT include integrated voltage regulators?
Yes, the BQ29330ADBT integrates two low-dropout regulators: a 2.5-V/16-mA LDO (REG pin) and a 3.3-V/25-mA LDO (LEDOUT pin). The 3.3-V LDO can power the 2.5-V LDO and external LEDs, eliminating the need for discrete regulators in compact battery pack designs.
Can the BQ29330ADBT perform cell balancing, and how is it implemented?
Yes, the BQ29330ADBT provides integrated cell balancing drive via internal FET switches connected to VC1–VC5 pins. Each cell can be selectively bypassed using external series resistors (500–1 kΩ), with maximum bypass current set by the internal FET's RDS(on) (~400 Ω) and resistor value - enabling passive balancing during charge cycles.
What communication interfaces does the BQ29330ADBT support?
The BQ29330ADBT supports I²C-compatible, SMBus, HDQ, and UART host interfaces. SCLK and SDATA pins implement open-drain I²C/SMBus with internal 10-kΩ pullups; dedicated HDQ and UART pins allow direct connection to TI fuel gauges or microcontrollers without protocol conversion hardware.
What are the key protection features of the BQ29330ADBT?
The BQ29330ADBT provides hardware-enforced protection against cell overvoltage/undervoltage, battery overvoltage/undervoltage, overload (OL), short-circuit-in-charge (SCC), and short-circuit-in-discharge (SCD). All thresholds and blanking delays are programmable via registers, and fault responses (FET disable, XALERT assertion) occur autonomously without host intervention.
BQ29330ADBT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Not For New Designs
- Function:
- -
- Battery Chemistry:
- -
- Number of Cells:
- -
- Fault Protection:
- -
- Interface:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
BQ29330ADBT FAQ
1.How can I place an order for BQ29330ADBT through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ29330ADBT 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 BQ29330ADBT reliable?
The price and inventory of BQ29330ADBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ29330ADBT is usually 5 days.
3.What payment methods are accepted for BQ29330ADBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ29330ADBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ29330ADBT?
BQ29330ADBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ29330ADBT 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 BQ29330ADBT?
For technical support, including BQ29330ADBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ29330ADBT requirements.
6.How does Aetrix verify that BQ29330ADBT is sourced from the original manufacturer or authorized distributors?
All BQ29330ADBT 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 BQ29330ADBT meets industry standards.
7.What is the process for return or replacement of BQ29330ADBT?
All BQ29330ADBT units undergo pre-shipment inspection (PSI). If there is an issue with BQ29330ADBT, 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 BQ29330ADBT part is unused and in its original packaging.
Return procedure for BQ29330ADBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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