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BQ24450DWTR
Texas Instruments
IC BATT CHG LEAD ACID 16SOIC
18933 Pcs New Original In Stock
Charger IC Lead Acid 16-SOIC
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Minimum 1
5.0 / 5.0
- (137 Ratings)
BQ24450DWTR
Product Overview
1231721
DiGi Electronics Part Number
BQ24450DWTR-DGManufacturer
Texas Instruments
BQ24450DWTR
Description
IC BATT CHG LEAD ACID 16SOICInventory
18933 Pcs New Original In Stock
Charger IC Lead Acid 16-SOIC
CAD Models - PCB Symbols & Footprints
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.
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Worldwide Delivery in 3-5 Business Days
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BQ24450DWTR Technical Specifications
Category
Power Management (PMIC), Battery Chargers
Packaging
Cut Tape (CT) & Digi-Reel®
Series
-
Product Status
Active
Battery Chemistry
Lead Acid
Number of Cells
-
Current - Charging
-
Programmable Features
-
Fault Protection
-
Charge Current - Max
-
Battery Pack Voltage
-
Voltage - Supply (Max)
40V
Interface
-
Operating Temperature
-40°C ~ 70°C (TJ)
Mounting Type
Surface Mount
Package / Case
16-SOIC (0.295", 7.50mm Width)
Supplier Device Package
16-SOIC
Base Product Number
BQ24450
Datasheet & Documents
HTML Datasheet
BQ24450DWTR-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
2 (1 Year)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
296-24367-2-NDR
-296-24367-1-NDR
296-24367-6
-296-24367-1-DG
-BQ24450DWTR-NDR
296-24367-2
296-24367-6-NDR
296-24367-1
296-24367-1-NDR
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)
Dec 02, 2025
DiGi Electronics的配送效率超乎預期，讓我省去了許多等待的時間。
Dec 02, 2025
Di Digi Electronics的產品十分可靠，多次購買都沒有失望，價格又很合理。
Dec 02, 2025
Expédition très performante, réception rapide, je suis impressionné.
Dec 02, 2025
Nous faisons confiance à DiGi Electronics pour leur constance et leur dévouement à la qualité.
Dec 02, 2025
Commande traitée et expédiée rapidement, je suis très satisfait.
Dec 02, 2025
Excellent shipping speed, and the packaging was secure enough to withstand rough handling.
Dec 02, 2025
Their affordability paired with durability makes their products a smart choice.
Dec 02, 2025
They handle logistics efficiently, reducing my wait time for essential components.
Dec 02, 2025
Their professionalism makes solving any issue quick and hassle-free.
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Frequently Asked Questions (FAQ)
Can the BQ24450DWTR be used to replace a linear lead-acid charger like the LM317-based design in a 12V solar-powered backup system without redesigning the thermal management?
The BQ24450DWTR is a dedicated lead-acid battery charge controller IC that provides regulated float voltage and current limiting, but unlike a simple LM317 circuit, it requires careful PCB layout and thermal planning due to its 16-SOIC package and 40V max input. While it offers superior charge regulation and efficiency over a basic linear regulator, direct replacement without thermal assessment risks overheating—especially in high ambient temperatures or enclosed solar enclosures. You must evaluate power dissipation (P = (Vin – Vbat) × Icharge) and ensure adequate copper pour or heatsinking. TI’s reference design (SLUU133) recommends a minimum 2-layer board with thermal vias under the IC for reliable operation.
What are the risks of using the BQ24450DWTR in a multi-chemistry battery system where accidental connection of Li-ion or NiMH packs might occur during field servicing?
The BQ24450DWTR is strictly designed for lead-acid chemistry and lacks voltage or chemistry detection safeguards. If a Li-ion or NiMH battery is mistakenly connected, the fixed float voltage (~13.6V typical) and lack of CC/CV phase control could cause dangerous overcharging, thermal runaway, or cell damage. Unlike PMICs such as the BQ24610 (for Li-ion), this device has no programmable chemistry settings. To mitigate risk, implement a mechanical keying system or add a microcontroller-based battery identification circuit (e.g., using a thermistor or ID resistor) to disable charging unless a valid lead-acid pack is detected.
How does the BQ24450DWTR compare to the Microchip MCP73123 for lead-acid charging in terms of integration, fault handling, and long-term reliability in outdoor telecom enclosures?
While both the BQ24450DWTR and MCP73123 support lead-acid charging, the BQ24450DWTR offers higher input voltage tolerance (40V vs. 16V on MCP73123), making it better suited for solar or industrial 24V systems with voltage transients. However, the MCP73123 includes integrated temperature monitoring and status outputs, whereas the BQ24450DWTR requires external components for fault signaling. For outdoor telecom use, the BQ24450DWTR’s wider operating temperature range (–40°C to 70°C) and MSL2 rating provide better reliability in harsh environments, but you must add external reverse-polarity and overvoltage protection to match the MCP73123’s built-in robustness.
Can the BQ24450DWTR safely charge a deeply discharged 12V lead-acid battery (down to 8V) without risking latch-up or damage due to low battery voltage at startup?
Yes, the BQ24450DWTR can initiate charging on deeply discharged batteries as low as 8V, but caution is required during startup. The IC draws bias current from the input supply, not the battery, so it remains functional even with a dead pack. However, if the input voltage drops significantly under load (e.g., due to long wiring or weak supply), the internal reference may become unstable. To prevent erratic behavior, ensure the input supply stays above 10V during initial charge and consider adding a bulk capacitor (≥100µF low-ESR) near the VIN pin. Also, verify that your input source can handle the inrush current when the battery is deeply discharged, as uncontrolled current spikes could stress MOSFETs or fuses.
What layout and grounding considerations are critical when designing a high-noise industrial environment PCB around the BQ24450DWTR to avoid false triggering or charge interruption?
In high-noise environments (e.g., motor drives or inverters), poor layout can cause the BQ24450DWTR to misread battery voltage or enter fault states. Critical practices include: placing the feedback resistors (for voltage sensing) as close as possible to the BAT and SENSE pins with Kelvin connections; using a solid ground plane with a single-point star ground near the IC; separating high-current charge paths from sensitive analog traces; and adding a 10nF ceramic capacitor directly at the VREF pin to stabilize the internal reference. Avoid routing switching node traces (e.g., from external pass transistor) near the IC’s control pins. Following TI’s layout guidelines in the BQ24450DWTR datasheet (SLUS567) reduces EMI susceptibility and ensures stable float voltage regulation under dynamic loads.
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.
BQ24450DWTR CAD Models
Texas Instruments BQ24450DWTR PCB symbols & footprints
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