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Texas Instruments BQ29413PWR
- Part No.:
- BQ29413PWR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
BQ29413PWR.pdf
- Description:
- IC BATT PROT LI-ION 2-4CL 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,790
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Product details
Overview
BQ29413PWR from Texas Instruments is a secondary overvoltage protection IC for 2-, 3-, or 4-cell Li-ion battery packs, featuring fixed 4.50 V per-cell overvoltage threshold, <2 µA supply current, and programmable delay via external capacitor on CD pin. It monitors individual cell voltages (VC1–VC4), drives an external N-channel FET to blow the fuse upon overvoltage, and operates across –40°C to 110°C.
For engineers reviewing the BQ29413PWR datasheet, BQ29413PWR pinout, BQ29413PWR application, or BQ29413PWR equivalent, this page delivers verified technical context, exact pin functions, real-world use cases in portable instrumentation and notebook battery packs, and validated alternative options for second-level Li-ion protection design.
Technical Context
The BQ29413PWR implements precision voltage monitoring across up to four series-connected Li-ion cells using dedicated sense inputs (VC1–VC4), comparing each against an internal 4.50 V reference with ±80 mV accuracy over –40°C to 110°C. Its overvoltage detection triggers a controlled delay via CD pin charging (0.18 µA current source) before asserting the open-drain OUT signal.
It features high ripple rejection and stable operation during pulse charging, with independent input voltage range (–0.3 V to 28 V per sense pin) and differential cell-voltage tolerance (0–8 V between adjacent VC pins). The device supports flexible cell configurations (2S–4S) via configurable VC pin connections and requires no external biasing for normal operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Overvoltage Threshold | 4.50 V per cell - fixed, factory-trimmed value enabling precise second-level protection without external resistors. |
| Supply Current (ICC) | <2 µA at TA = 25°C - ultra-low quiescent power extends battery shelf life in always-connected protection circuits. |
| Overvoltage Accuracy | ±80 mV over –40°C to 110°C - ensures reliable trip margin under extreme thermal conditions in portable equipment. |
| Delay Time Programmability | Configured via CD pin capacitor (e.g., 0.22 µF → 1.5 s typical) - allows system-level tuning of fault response window before fuse activation. |
| Operating Temperature | –40°C to 110°C - supports industrial and high-ambient applications including ruggedized portable instrumentation. |
| Cell Configuration Support | 2-, 3-, or 4-cell Li-ion stacks - achieved by selective VC pin interconnection, enabling single-IC reuse across multiple pack designs. |
| Output Type | Open-drain OUT pin - directly drives gate of external N-channel FET to interrupt charge path and blow fuse. |
Pinout & Package
TSSOP-8 (PW) package, 3.0 mm × 4.4 mm × 1.2 mm body height, RoHS-compliant, tape-and-reel (2000 pcs/reel), MSL Level-2-260°C-1 year.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VC1) | Sense input for most positive cell | Connects to top of battery stack; voltage must be ≤28 V above GND and ≥VC2 to ensure valid 4S operation. |
| 2 (VC2) | Sense input for second most positive cell | Used in 3S/4S configs; tied to VC1 for 2S operation; differential voltage VC1–VC2 must stay within 0–8 V. |
| 3 (VC3) | Sense input for third most positive cell | Required for 4S; tied to VC2 for 3S; enables independent monitoring of middle cells in multi-cell packs. |
| 4 (GND) | Ground reference | System ground return for all internal circuitry and sense references; must be low-impedance connection. |
| 5 (VC4) | Sense input for least positive cell | Connects to bottom cell's positive terminal (i.e., node between Cell 1 and GND in 4S); defines lowest monitored node. |
| 6 (CD) | Capacitor delay timing input | Charged by 0.18 µA internal current source; reaches 1.2 V to trigger OUT; sets overvoltage response latency. |
| 7 (VDD) | Power supply input | Accepts 4–25 V; powers internal circuitry; may be connected to VC1 in standard configurations. |
| 8 (OUT) | Open-drain protection output | Drives external N-FET gate; sinks ≤5 µA when low, sources ≤1 mA when pulled high externally for fuse control. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 4.50 V overvoltage threshold | Eliminates external resistor network and calibration effort; guarantees consistent trip point across production lots. |
| Programmable overvoltage delay | Enables system-level coordination with primary protection ICs and avoids nuisance trips during transient voltage spikes. |
| Ultra-low ICC < 2 µA | Minimizes parasitic drain on battery during storage or standby, critical for long-shelf-life portable devices. |
| High supply ripple rejection | Maintains accurate cell voltage sampling even under noisy switching charger conditions, preventing false triggering. |
| Stable during pulse charge operation | Continues reliable monitoring without latch-up or reset during intermittent high-current charging pulses. |
Applications
| Notebook Computer Battery Packs | Portable Instrumentation Power Systems |
|---|---|
Use Scenario: Secondary overvoltage protection in multi-cell Li-ion packs used in business-class notebooks with fast-charge capability. IC Role / Device Role / Timing Role: Monitors individual cell voltages in real time and asserts OUT after programmable delay to disable charging if any cell exceeds 4.50 V. Use Value: Prevents thermal runaway during AC adapter overvoltage events or charger communication failure, meeting UL 2054 safety requirements. |
Use Scenario: Safety-critical backup power for handheld multimeters, oscilloscopes, and gas analyzers operating in field environments. IC Role / Device Role / Timing Role: Acts as independent hardware-based fail-safe that activates only when primary BMS fails to clamp cell voltage. Use Value: Ensures compliance with IEC 62133 for secondary protection, extending safe operational lifetime beyond primary controller limits. |
| Medical Portable Diagnostic Devices | Industrial Handheld Data Collectors |
Use Scenario: Rechargeable battery packs in FDA-cleared portable ECG monitors and ultrasound probes requiring dual-layer safety. IC Role / Device Role / Timing Role: Provides redundant overvoltage cutoff independent of host MCU firmware, triggered solely by analog cell voltage comparison. Use Value: Meets ISO 14971 risk management requirements by eliminating single-point failure modes in life-support adjacent systems. |
Use Scenario: Ruggedized barcode scanners and RFID readers deployed in warehouses with wide ambient temperature swings. IC Role / Device Role / Timing Role: Detects overvoltage during regenerative braking or hot-swap events in 3S Li-ion packs and initiates fuse blow via OUT-driven FET. Use Value: Enables operation from –40°C to 110°C ambient while maintaining ±80 mV trip accuracy, reducing field failure rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar secondary overvoltage protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ29412PWR | 4.45 V fixed overvoltage threshold; otherwise identical pinout, timing, and package. | Suitable where tighter cell voltage margin is required before secondary shutdown, e.g., high-precision medical battery packs. | Select BQ29412PWR when system architecture mandates earlier intervention than 4.50 V allows. |
| BQ29414PWR | 4.55 V fixed overvoltage threshold; same electrical specs and TSSOP-8 footprint. | Preferred in applications with higher cell voltage tolerance, such as certain power tool packs with extended charge profiles. | Choose BQ29414PWR when primary protection has wider hysteresis or when legacy pack design uses 4.55 V trip points. |
Compared with BQ29412PWR and BQ29414PWR, the BQ29413PWR provides the industry-standard 4.50 V secondary overvoltage threshold-aligned with common Li-ion chemistry upper limits-while maintaining full functional and mechanical compatibility across the bq2941x family.
Availability
BQ29413PWR is available at Aetrix Electronics and suitable for notebook computer battery packs, portable instrumentation power systems, and industrial handheld data collectors requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for BQ29413PWR 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 company specializing in analog and embedded processing technologies, with leadership in battery management, power conversion, and precision analog ICs.
The bq2941x product line was designed specifically for redundant, hardware-based overvoltage protection in multi-cell Li-ion battery packs-delivering fail-safe shutdown independent of software-controlled primary BMS.
FAQ
What is the overvoltage protection threshold of the BQ29413PWR?
The BQ29413PWR has a fixed, factory-trimmed overvoltage protection threshold of 4.50 V per cell, specified with ±80 mV accuracy over the full operating temperature range (–40°C to 110°C). This value is not adjustable and applies uniformly to all monitored cells (VC1–VC4) in 2S–4S configurations. The BQ29413PWR uses this threshold to initiate the CD pin delay sequence and ultimately assert the OUT signal.
How does the BQ29413PWR implement programmable delay for overvoltage response?
The BQ29413PWR implements programmable delay via its CD pin, which sources a precise 0.18 µA current to charge an external capacitor. When the CD pin voltage reaches 1.2 V, the OUT pin transitions to activate the external fuse-blowing FET. For example, a 0.22 µF capacitor yields a typical delay of 1.5 seconds. The BQ29413PWR's delay is fully analog and independent of MCU intervention, ensuring deterministic response timing.
Can the BQ29413PWR be used in a 2-cell Li-ion configuration?
Yes, the BQ29413PWR supports 2-cell (2S) configurations by connecting VC1, VC2, and VC3 together to the positive terminal of the top cell, and VC4 to the positive terminal of the bottom cell (i.e., junction between Cell 1 and Cell 2). GND connects to the battery negative. This wiring reduces the effective number of monitored nodes while preserving full functionality of the BQ29413PWR's overvoltage detection and delay logic.
What package type and dimensions does the BQ29413PWR use?
The BQ29413PWR uses the TSSOP-8 (PW) package: 3.0 mm × 4.4 mm body size, 1.2 mm maximum height, 0.65 mm lead pitch, and RoHS-compliant NiPdAu lead finish. It is supplied in tape-and-reel format (2000 units per reel) with MSL Level-2 rating (260°C peak reflow, 1-year floor life). The BQ29413PWR's pinout matches TI's standardized PW outline (MO-153 variation AA).
Does the BQ29413PWR require external components for basic operation?
Yes-the BQ29413PWR requires at minimum an external capacitor on the CD pin to set overvoltage delay time, and an external N-channel MOSFET driven by the OUT pin to interrupt the battery charge path and blow the fuse. Optional RC filters (RIN/CIN on VC pins, RVD/CVD on VDD) improve noise immunity but are not mandatory for functional operation. No external voltage dividers or trimming components are needed due to its fixed 4.50 V threshold.
BQ29413PWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Battery Protection
- Battery Chemistry:
- Lithium Ion
- Number of Cells:
- 2 ~ 4
- Fault Protection:
- Over Voltage
- Interface:
- -
- Operating Temperature:
- -40°C ~ 110°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
BQ29413PWR FAQ
1.How can I place an order for BQ29413PWR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ29413PWR 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 BQ29413PWR reliable?
The price and inventory of BQ29413PWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ29413PWR is usually 5 days.
3.What payment methods are accepted for BQ29413PWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ29413PWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ29413PWR?
BQ29413PWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ29413PWR 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 BQ29413PWR?
For technical support, including BQ29413PWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ29413PWR requirements.
6.How does Aetrix verify that BQ29413PWR is sourced from the original manufacturer or authorized distributors?
All BQ29413PWR 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 BQ29413PWR meets industry standards.
7.What is the process for return or replacement of BQ29413PWR?
All BQ29413PWR units undergo pre-shipment inspection (PSI). If there is an issue with BQ29413PWR, 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 BQ29413PWR part is unused and in its original packaging.
Return procedure for BQ29413PWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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