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BQ29312APWR
Texas Instruments
IC BATT PROT LI-ION 2-4C 24TSSOP
23779 Pcs New Original In Stock
Battery Battery Protection IC Lithium Ion/Polymer 24-TSSOP
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Minimum 1
5.0 / 5.0
- (93 Ratings)
BQ29312APWR
Product Overview
1262882
DiGi Electronics Part Number
BQ29312APWR-DGManufacturer
Texas Instruments
BQ29312APWR
Description
IC BATT PROT LI-ION 2-4C 24TSSOPInventory
23779 Pcs New Original In Stock
Battery Battery Protection IC Lithium Ion/Polymer 24-TSSOP
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
Warranty & Returns
How to Order
Shipping & Delivery
Quality Assurance
365 - Day Quality Guarantee - Every part fully backed.
90 - Day Refund or Exchange - Defective parts? No hassle.
Limited Stock, Order Now - Get reliable parts without worry.
Global Shipping & Secure Packaging
Worldwide Delivery in 3-5 Business Days
100% ESD Anti-Static Packaging
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BQ29312APWR Technical Specifications
Category
Power Management (PMIC), Battery Management
Packaging
Cut Tape (CT) & Digi-Reel®
Series
-
Product Status
Active
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 ~ 85°C (TA)
Mounting Type
Surface Mount
Package / Case
24-TSSOP (0.173", 4.40mm Width)
Supplier Device Package
24-TSSOP
Base Product Number
BQ29312
Datasheet & Documents
HTML Datasheet
BQ29312APWR-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
BQ29312APWR-DG
296-25926-6
296-25926-1
296-25926-2
Standard Package
2,000
Alternative Parts
PART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
La livraison a été parfaitement stable et rapide, ce qui m'a permis de recevoir mes achats en temps voulu, avec un service après-vente toujours à l'écoute.
de desembre 02, 2025
Timely delivery combined with affordable prices makes shopping stress-free.
de desembre 02, 2025
The packaging integrity directly contributes to the quality of the customer experience.
de desembre 02, 2025
Speedy delivery and outstanding product durability—Di Digi Electronics has become my trusted supplier.
de desembre 02, 2025
The real-time updates provided peace of mind during transit, a testament to their customer-centric approach.
de desembre 02, 2025
Their competitive pricing makes premium quality accessible to all consumers.
de desembre 02, 2025
Their extensive product selection allows us to build comprehensive learning solutions without sourcing from multiple vendors.
de desembre 02, 2025
Durability is top-notch; it feels solid and designed for everyday wear and tear.
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Frequently Asked Questions (FAQ)
How does the BQ29312APWR handle cell imbalance in a 3S Li-ion battery pack during charging, and what design steps should I take to prevent protection false triggers due to voltage mismatch?
The BQ29312APWR does not include active cell balancing; it only monitors individual cell voltages and triggers overvoltage protection if any cell exceeds the threshold. In a 3S configuration, passive balancing via external resistors or a dedicated balancer IC (e.g., BQ77915) is required to prevent imbalance-induced false OVP trips. Ensure tight tolerance (±10mV) in cell selection and use matched interconnects to minimize differential resistance. Without balancing, repeated charge cycles can cause one cell to consistently hit OVP first, leading to reduced pack capacity and premature protection lockouts.
Can I replace the BQ29312APWR with a cheaper alternative like the DW01A in a 4S drone battery application, and what are the critical risks of doing so?
Replacing the BQ29312APWR with the DW01A is not recommended for 4S applications. The DW01A is a single-cell protector and lacks per-cell monitoring, making it incapable of detecting individual cell overvoltage in series stacks—this creates a severe fire risk if one cell overcharges while others remain within limits. Additionally, the BQ29312APWR offers I2C diagnostics and configurable thresholds, which the DW01A lacks. For multi-cell systems, always use a dedicated multi-cell protector like the BQ29312APWR or TI’s BQ77905 to ensure safe, reliable operation.
What layout considerations are critical when placing the BQ29312APWR on a high-current 4S battery management board to avoid nuisance overcurrent trips during motor startup in an electric scooter?
To prevent nuisance overcurrent trips during high-inrush events like motor startup, minimize the resistance and inductance of the sense path between the battery negative, sense resistor, and BQ29312APWR’s VSS and SRP/SRN pins. Use a 4-wire Kelvin connection for the sense resistor and place it as close as possible to the IC. Route high-current return paths away from sensitive analog traces. Also, ensure the PCB ground plane under the IC is solid and low-impedance. Consider adding a small RC filter (e.g., 100Ω + 100nF) at the SRP/SRN inputs to suppress transient noise without significantly delaying fault response.
Is the BQ29312APWR suitable for automotive applications requiring operation at 105°C ambient, given its -40°C to 85°C rating?
No, the BQ29312APWR is not suitable for sustained operation above 85°C ambient, as specified in its datasheet. While brief excursions may be tolerated, prolonged exposure to 105°C exceeds the maximum junction temperature limits and risks thermal runaway or degraded reliability. For automotive-grade battery packs (e.g., e-bikes, EVs), consider automotive-qualified alternatives like the BQ77915A (rated up to 105°C) or implement active cooling and thermal derating strategies. Always validate thermal performance under worst-case load and environmental conditions to avoid field failures.
How do I configure the BQ29312APWR’s I2C interface to safely disable protection features during factory testing without compromising end-user safety?
The BQ29312APWR allows temporary disablement of protection via I2C commands (e.g., writing to control registers), but this should only be done in a controlled test environment with external monitoring. Never ship units with protections disabled. Use a secure test firmware mode that automatically re-enables all protections after a timeout (e.g., 60 seconds) or upon disconnection of the test jig. Document this procedure clearly and restrict access to authorized personnel. Bypassing protection permanently voids safety certifications and introduces liability; always ensure the final firmware locks critical registers and validates protection status at boot.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
BQ29312APWR CAD Models
Texas Instruments BQ29312APWR PCB symbols & footprints
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