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Texas Instruments BQ29330DBTR
- Part No.:
- BQ29330DBTR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 30-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
BQ29330DBTR.pdf
- Description:
- IC BATT PROT LI-ION 2-4C 30TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,065
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Product details
Overview
BQ29330DBTR 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-compatible interface, NMOS FET drive for charge/discharge control, and programmable overcurrent protection. It delivers individual cell voltage translation (0.15× scaling), 2-kB data flash, and cell balancing drive for notebook and medical battery packs.
For engineers reviewing the BQ29330DBTR datasheet, BQ29330DBTR pinout, BQ29330DBTR application, or BQ29330DBTR equivalent, this page provides verified technical context, real-world use scenarios, validated alternative parts, and supply support for industrial battery management system design.
Technical Context
The BQ29330DBTR implements autonomous safety protection via dedicated comparators for overload (discharge), short-circuit in charge (SCC), and short-circuit in discharge (SCD), each with independently programmable thresholds (50–205 mV for OL; 100–475 mV for SCC/SCD) and blanking delays (1–31 ms for OL; 0–915 μs for SCC/SCD). Its dual-LDO architecture powers internal circuitry and external peripherals while maintaining low quiescent current (100 μA typical).
Cell voltage monitoring uses a delta-sigma A/D converter with calibrated gain (K = 0.150 ±0.003) and offset correction, delivering scaled outputs (CELL+/CELL−) referenced to GND. The I²C-compatible serial interface enables host access to status registers, configuration control (e.g., CELL_SEL, FUNCTION_CTL), and real-time fault reporting via XALERT open-drain output.
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 - supports wide-input battery pack voltages including 3S (12.6 V) and 4S (16.8 V) configurations. |
| Overload Threshold | Programmable 50–205 mV in 5-mV steps - allows precise current-sense resistor selection (e.g., 5 mΩ yields 250 mA–1.025 A trip range). |
| Quiescent Current | 100 μA typical in normal mode - extends shelf life and reduces standby power loss in portable systems. |
| Cell Voltage Scaling | 0.15× linear translation with ±0.003 gain error - enables accurate host-side cell voltage reconstruction (e.g., 4.2 V cell → 0.63 V output). |
| I²C Interface | Standard-mode (≤100 kHz), open-drain SCLK/SDATA with internal 10-kΩ pullups - simplifies host MCU integration without external biasing. |
| FET Drive Outputs | CHG/DSG/ZVCHG with 12 V typical gate drive swing - directly drives NMOS pass FETs without external level shifters. |
Pinout & Package
TSSOP-30 package (DBT) with exposed thermal pad; 0.65-mm pitch; RoHS-compliant; rated for –40°C to +110°C ambient operation.
| 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 path control. |
| SRP/SRN | Current sense differential pair | Measures bidirectional pack current; SRP = high-side during charge, low-side during discharge; enables OL/SCC/SCD detection. |
| CHG/DSG/ZVCHG | NMOS FET gate drivers | Drive external N-channel FETs: CHG controls charge path, DSG controls discharge path, ZVCHG enables precharge P-FET via external driver. |
| CELL+/CELL− | Scaled cell voltage output | Delivers GND-referenced analog voltage proportional to selected cell (0.15× Vcell) for host ADC sampling. |
| SCLK/SDATA/XALERT | I²C-compatible serial interface | Open-drain bus signals with internal pullups; XALERT asserts low on fault events (OL/SCC/SCD) for interrupt-driven host response. |
| REG/LEDOUT | Integrated LDO outputs | REG = 2.5 V/16 mA for internal logic and peripherals; LEDOUT = 3.3 V/25 mA for display backlight or external sensors. |
| WDI/TOUT | Watchdog timing & thermistor bias | WDI accepts 32.768-kHz clock for watchdog timeout; TOUT supplies 2.5-V bias current for NTC thermistor networks. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Protection Thresholds | Independent OL, SCC, and SCD voltage thresholds and delay times configured via I²C registers - eliminates hardware rework for safety tuning. |
| Integrated Dual LDOs | 2.5-V/16-mA and 3.3-V/25-mA regulators powered from VCC/BAT - reduces BOM count and PCB area versus discrete LDO solutions. |
| Cell Balancing Drive | Internal FET switch per cell with 400-Ω RDS(on) - enables passive balancing using external 500–1-kΩ resistors; no external MOSFET required. |
| Calibrated Cell Voltage Monitor | Gain accuracy ±0.003 and user-accessible calibration registers (CAL0/CAL1) - achieves <±5 mV cell voltage error after calibration. |
| Multi-Power Mode Control | Host-configurable Sleep (50 μA), Ship (1 μA), and Normal modes - optimizes energy use across storage, transport, and active operation phases. |
Applications
| Notebook Battery Packs | Medical Portable Devices |
|---|---|
|
Use Scenario: 3S/4S Li-ion packs powering ultrabooks with dynamic load profiles and strict safety certification requirements (UL 2054, IEC 62133). IC Role / Device Role / Timing Role: Primary protection AFE performing real-time cell voltage monitoring, current fault detection, and FET gate control under host supervision. Use Value: Enables certified pack-level safety compliance with programmable thresholds and latchable fault reporting via XALERT interrupt. |
Use Scenario: Rechargeable battery modules in handheld diagnostic instruments requiring long shelf life and reliable low-power operation. IC Role / Device Role / Timing Role: Battery management controller managing sleep/ship modes, thermistor-based temperature monitoring, and cell balancing during charging. Use Value: Reduces standby current to 50 μA (Sleep) and 1 μA (Ship), extending shelf life beyond 12 months without maintenance. |
| Test & Measurement Equipment | Industrial Handheld Terminals |
|
Use Scenario: Field-deployable multimeters and oscilloscopes needing robust overvoltage/overcurrent protection during accidental misconnection. IC Role / Device Role / Timing Role: Safety supervisor enforcing fast-acting SCD response (<915 μs delay) and autonomous FET shutdown upon fault detection. Use Value: Prevents catastrophic failure during misuse by disabling charge/discharge paths within microseconds of short-circuit event. |
Use Scenario: Ruggedized warehouse scanners operating in wide temperature ranges (–25°C to +85°C) with frequent hot-swap battery replacement. IC Role / Device Role / Timing Role: Pack interface IC providing scaled cell voltages to host MCU, LEDOUT-powered status indicators, and POR-stable reset signaling. Use Value: Ensures reliable boot-up and status feedback across temperature extremes using integrated 2.5-V/3.3-V LDOs with ±0.2% tempco. |
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-kB data flash; lacks TOUT thermistor bias output. | Targeted at cost-sensitive 2S/3S packs without precharge or thermistor monitoring needs. | Select when reduced cell count and simplified feature set suffice; not suitable for 4S or thermistor-based thermal management. |
| BQ294002DBTR | Standalone protector (no I²C); fixed thresholds; no LDOs; 300-μA quiescent current. | Used in basic protection-only designs where host communication and low-power operation are unnecessary. | Choose for minimal BOM count in non-smart packs; requires external LDOs and cannot support host-controlled calibration or balancing. |
Compared with BQ29330DBTR, BQ29312ADBTR offers lower cost but sacrifices 4S support and thermistor drive, while BQ294002DBTR eliminates software configurability and increases standby power - making BQ29330DBTR optimal for programmable, multi-cell, low-power smart battery systems.
Availability
BQ29330DBTR is available at Aetrix Electronics and suitable for notebook computers, medical portable devices, test and measurement equipment, and industrial handheld terminals requiring stable component supply and long-term lifecycle support.
Supply support for BQ29330DBTR 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 IP.
The BQ29330DBTR belongs to TI's bq29xxx family of high-accuracy, programmable battery protection AFEs designed for safety-critical Li-ion/Li-polymer applications demanding configurable fault response and host-integrated diagnostics.
FAQ
What is the primary function of the BQ29330DBTR in a battery pack?
The BQ29330DBTR serves as a full-protection analog front-end IC for 2-/3-/4-series Li-ion/Li-polymer battery packs. It monitors individual cell voltages, detects overcurrent faults (overload, short-circuit in charge/discharge), controls external NMOS FETs for charge/discharge paths, provides regulated power outputs (2.5 V and 3.3 V), and communicates with the host via I²C. Its core role is ensuring safe, reliable, and intelligent battery operation under dynamic load conditions.
Does the BQ29330DBTR support 4-cell lithium-ion battery configurations?
Yes, the BQ29330DBTR explicitly supports 2-series, 3-series, and 4-series lithium-ion or lithium-polymer cell configurations. Its VC1–VC5 pin set accommodates up to four stacked cells, with dedicated sense inputs enabling individual cell voltage translation and selective cell balancing. Configuration is determined by external connections and register settings - no hardware change is needed to scale from 2S to 4S.
How does the BQ29330DBTR handle overcurrent protection events?
The BQ29330DBTR implements three independent overcurrent protection mechanisms: overload (discharge), short-circuit in charge (SCC), and short-circuit in discharge (SCD). Each uses the SRP/SRN differential input to detect voltage drops across the sense resistor. Thresholds (e.g., 50–205 mV for OL) and blanking delays (e.g., 1–31 ms for OL) are programmable via I²C registers. Upon fault detection, it autonomously disables CHG and/or DSG FET drives and asserts XALERT to notify the host.
Can the BQ29330DBTR perform cell voltage calibration?
Yes, the BQ29330DBTR includes dedicated calibration registers (CAL0/CAL1) and a documented 6-step procedure to measure and correct both gain (K) and offset (VOS) errors in the cell voltage monitor amplifier. This enables post-assembly calibration to achieve <±5 mV absolute cell voltage accuracy - critical for state-of-charge estimation and balancing precision in high-reliability applications.
What are the key power supply requirements for the BQ29330DBTR?
The BQ29330DBTR operates from a 4.5 V to 28 V supply applied to VCC or BAT pins. It integrates two LDOs: a 2.5-V/16-mA regulator (REG) powered from LEDOUT, and a 3.3-V/25-mA regulator (LEDOUT) powered from VCC/BAT. Minimum startup voltage is 5.5 V on VCC/BAT. Quiescent current is 100 μA typical in normal mode, dropping to 50 μA in Sleep and 1 μA in Ship mode - supporting ultra-low-power battery management.
BQ29330DBTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 30-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- 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
BQ29330DBTR FAQ
1.How can I place an order for BQ29330DBTR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ29330DBTR 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 BQ29330DBTR reliable?
The price and inventory of BQ29330DBTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ29330DBTR is usually 5 days.
3.What payment methods are accepted for BQ29330DBTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ29330DBTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ29330DBTR?
BQ29330DBTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ29330DBTR 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 BQ29330DBTR?
For technical support, including BQ29330DBTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ29330DBTR requirements.
6.How does Aetrix verify that BQ29330DBTR is sourced from the original manufacturer or authorized distributors?
All BQ29330DBTR 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 BQ29330DBTR meets industry standards.
7.What is the process for return or replacement of BQ29330DBTR?
All BQ29330DBTR units undergo pre-shipment inspection (PSI). If there is an issue with BQ29330DBTR, 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 BQ29330DBTR part is unused and in its original packaging.
Return procedure for BQ29330DBTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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