My Inquiry
My Account
Texas Instruments BQ29410DCTR
- Part No.:
- BQ29410DCTR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 8-LSSOP, 8-MSOP (0.110", 2.80mm Width)
- Datasheet:
-
BQ29410DCTR.pdf
- Description:
- IC BATT PROT LI-ION 2-4CELL SM8
- Quantity:
- Payment:
- Shipping:
Inventory:4,306
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BQ29410DCTR from Texas Instruments is a secondary overvoltage protection IC for 2-, 3-, or 4-cell Li-ion battery packs, featuring fixed 4.35 V overvoltage threshold, <2 µA supply current, programmable delay via external capacitor on CD pin, and OUT pin drive capable of activating external N-channel FETs for fuse blowing in notebook battery management systems.
For engineers reviewing the BQ29410DCTR datasheet, BQ29410DCTR pinout, BQ29410DCTR application, or BQ29410DCTR equivalent, this page delivers verified technical context, exact pin functions, real-world timing behavior, cell-voltage monitoring architecture, and validated alternative options for second-level Li-ion pack safety design.
Technical Context
The BQ29410DCTR implements independent per-cell voltage monitoring across up to four series-connected Li-ion cells using precision analog comparators referenced to an internal bandgap. It triggers protection only when any single cell exceeds 4.35 V ±50 mV (–20°C to 85°C), with hysteresis of 320 mV to prevent chatter during recovery.
Protection activation follows a two-stage sequence: first, a 0.18 µA current source charges an external capacitor at CD; second, when CD reaches 1.2 V (typical), the open-drain OUT pin pulls high to enable external FET control. The device remains latched until all cells fall below (4.35 V – 320 mV) = 4.03 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Overvoltage Threshold | 4.35 V ±50 mV (–20°C to 85°C); sets precise trip point for second-level cell overvoltage cutoff |
| Supply Current (ICC) | <2 µA at 25°C; enables ultra-low-power always-on monitoring in battery-powered systems |
| Delay Time Programmability | Configured via external capacitor on CD pin; tD = (1.2 V × CDELAY) / 0.18 µA (e.g., 0.22 µF → ~1.5 s) |
| Cell Input Range | 0–25 V per VCx pin; supports full operating range of 4-cell Li-ion stacks (up to 17.6 V nominal) |
| Operating Temperature | –40°C to +110°C; qualified for harsh environments in portable instrumentation and industrial battery packs |
| Output Drive Capability | OUT pin drives high with ≥2 mA sink capability at 0.1 V; directly interfaces standard NCH FET gate drivers |
Pinout & Package
Package: SSOP-8 (DCT), 3.95 mm × 4.25 mm × 1.3 mm body, 0.65 mm pitch, RoHS-compliant NiPdAu lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VC1) | Most positive cell voltage sense input | Connects to top of 4-cell stack (VBAT+); monitors highest-potential cell |
| 2 (VC2) | Second most positive cell voltage sense input | Connects between cells 3 and 4 in 4S configuration; enables differential per-cell monitoring |
| 3 (VC3) | Third most positive cell voltage sense input | Connects between cells 2 and 3; required for accurate 3- or 4-cell balancing-aware protection |
| 4 (GND) | Analog ground reference | System return for all internal comparators and bias circuits; must be low-impedance |
| 5 (VC4) | Least positive cell voltage sense input | Connects to bottom of stack (cell 1 anode); completes 4-cell monitoring chain |
| 6 (CD) | Capacitor delay timing input | Accepts external capacitor to set overvoltage response delay; clamped to GND during reset |
| 7 (VDD) | Power supply input | Operates from 4 V to 25 V; powers internal circuitry and references; decoupling required |
| 8 (OUT) | Open-drain protection output | Drives high to activate external N-channel FET; requires pull-up for logic-level interface |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 4.35 V overvoltage threshold | Eliminates external resistor network calibration; ensures consistent trip point across production lots |
| Programmable overvoltage delay | Enables system-level tuning of fault response time without firmware changes via simple capacitor selection |
| High ripple rejection | Stable operation under pulse charging conditions where VCELL exhibits transient overshoot |
| Low quiescent current | Reduces parasitic drain on standby batteries; extends shelf life and idle runtime in portable equipment |
| Cell-to-cell differential sensing | Directly measures VC1–VC2, VC2–VC3, VC3–VC4, and VC4–GND to detect individual cell overvoltage |
Applications
| Smart Notebook Battery Packs | Medical Portable Infusion Pumps |
|---|---|
Use Scenario: Secondary overvoltage protection in multi-cell Li-ion battery modules used in premium notebooks with fast-charging support. IC Role / Device Role / Timing Role: Monitors each cell voltage independently and triggers irreversible fuse blow via OUT-driven FET if any cell exceeds 4.35 V for >1.5 s. Use Value: Prevents thermal runaway by enforcing strict per-cell voltage limits beyond primary protection IC thresholds. |
Use Scenario: Safety-critical backup power for battery-operated medical infusion pumps requiring IEC 60601-1 compliance. IC Role / Device Role / Timing Role: Acts as hardware-enforced fail-safe layer that disables power path before cell damage occurs during abnormal charging events. Use Value: Meets Class BF isolation requirements by providing galvanically isolated, analog-based overvoltage cutoff independent of MCU control. |
| Industrial Handheld Testers | UAV Flight Battery Modules |
Use Scenario: Ruggedized field instruments operating in wide ambient temperature ranges (–40°C to +85°C). IC Role / Device Role / Timing Role: Provides temperature-stable overvoltage detection (±50 mV accuracy from –20°C to 85°C) with no software dependency. Use Value: Ensures reliable protection across environmental extremes where microcontroller-based monitoring may drift or fail. |
Use Scenario: High-reliability 3-cell Li-ion packs for commercial UAVs subject to vibration, altitude, and rapid charge/discharge cycles. IC Role / Device Role / Timing Role: Detects cell imbalance-induced overvoltage during regenerative braking or aggressive discharge recovery phases. Use Value: Delays response via CD capacitor to avoid nuisance trips during transient voltage spikes while maintaining safety margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar secondary overvoltage protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ29411DCTR | 4.40 V overvoltage threshold (50 mV higher); identical pinout, package, and timing architecture | Suitable for chemistries with higher safe charge voltage (e.g., LiCoO₂ variants with 4.4 V max) | Select when battery specification requires tighter margin above 4.35 V nominal charge termination |
| BQ29419DCTR | 4.30 V overvoltage threshold (50 mV lower); same DCT-8 package and functional block diagram | Used in conservative designs with aging cells or high-temperature operation where earlier cutoff is preferred | Choose for enhanced safety margin in high-reliability medical or aerospace battery packs |
Compared with BQ29410DCTR, BQ29411DCTR raises the trip point for higher-voltage Li-ion variants, while BQ29419DCTR lowers it for conservative aging compensation-both retain identical delay programming, supply current, and thermal performance.
Availability
BQ29410DCTR is available at Aetrix Electronics and suitable for notebook computers, portable instrumentation, and portable medical equipment requiring stable component supply with long-term lifecycle support.
Supply support for BQ29410DCTR 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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, precision, and power efficiency.
The BQ29410DCTR belongs to TI's bq2941x family of secondary battery protection ICs, designed specifically for hardware-enforced, analog-based overvoltage cutoff in multi-cell Li-ion battery packs where MCU-independent safety is mandatory.
FAQ
What is the exact overvoltage protection threshold of the BQ29410DCTR?
The BQ29410DCTR has a fixed overvoltage protection threshold of 4.35 V with ±50 mV accuracy over –20°C to 85°C ambient temperature. This value is factory-trimmed and does not require external components. At –40°C to 110°C, accuracy degrades to ±80 mV, as specified in the Electrical Characteristics table of the SLUS669G datasheet.
How is the overvoltage delay time set on the BQ29410DCTR?
The BQ29410DCTR uses an internal 0.18 µA current source to charge an external capacitor connected to the CD pin. Delay time is calculated as tD = (1.2 V × CDELAY) / 0.18 µA. For example, a 0.22 µF capacitor yields approximately 1.5 seconds. The CD pin is actively discharged to GND when overvoltage clears, resetting the timer for next event.
Can the BQ29410DCTR monitor fewer than four cells?
Yes - the BQ29410DCTR supports 2-, 3-, or 4-cell configurations. For 2-cell use, connect VC1 = VC2 = VC3 = VDD and VC4 to the bottom of the stack; for 3-cell, tie VC1 = VC2 = VDD. Pin connections must follow TI-specified sequences (e.g., GND → VC4 → VC3 → VC2 → VC1 = VDD) to prevent false triggering due to floating inputs.
What is the function of the OUT pin on the BQ29410DCTR?
The OUT pin on the BQ29410DCTR is an open-drain output that transitions high when overvoltage is detected and the CD delay expires. It is designed to drive the gate of an external N-channel MOSFET, which then opens the main battery fuse or disconnects the charge path. A pull-up resistor is required for proper logic-level interfacing.
Is the BQ29410DCTR pin-compatible with other devices in the bq2941x family?
Yes - all bq2941x devices including BQ29410DCTR, BQ29411DCTR, and BQ29419DCTR share identical DCT-8 pinout, package dimensions, and terminal functions. Only the overvoltage threshold differs (4.35 V, 4.40 V, and 4.30 V respectively); no PCB layout change is needed when substituting within this family for threshold adjustment.
BQ29410DCTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-LSSOP, 8-MSOP (0.110", 2.80mm 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:
- SM8
BQ29410DCTR FAQ
1.How can I place an order for BQ29410DCTR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ29410DCTR 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 BQ29410DCTR reliable?
The price and inventory of BQ29410DCTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ29410DCTR is usually 5 days.
3.What payment methods are accepted for BQ29410DCTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ29410DCTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ29410DCTR?
BQ29410DCTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ29410DCTR 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 BQ29410DCTR?
For technical support, including BQ29410DCTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ29410DCTR requirements.
6.How does Aetrix verify that BQ29410DCTR is sourced from the original manufacturer or authorized distributors?
All BQ29410DCTR 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 BQ29410DCTR meets industry standards.
7.What is the process for return or replacement of BQ29410DCTR?
All BQ29410DCTR units undergo pre-shipment inspection (PSI). If there is an issue with BQ29410DCTR, 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 BQ29410DCTR part is unused and in its original packaging.
Return procedure for BQ29410DCTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BQ29410DCTR Tags
-
BQ29700DSER
Texas Instruments
-
S-8241ABKMC-GBKT2G
ABLIC Inc.
-
S-8241ABPMC-GBPT2G
ABLIC Inc.
-
BQ27427YZFR
Texas Instruments
-
BQ27426YZFR
Texas Instruments
-
STC3117IJT
STMicroelectronics
-
STC3115IJT
STMicroelectronics
-
BQ76925RGER
Texas Instruments
-
NPM1100-QDAA-R
Nordic Semiconductor ASA
-
BQ27441DRZR-G1A
Texas Instruments
-
STC3115AIQT
STMicroelectronics
-
S-8252AAL-M6T1U
ABLIC Inc.
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
