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BQ2019PW
Texas Instruments
IC BAT MON MULT-CHEM 1-3C 8TSSOP
1381 Pcs New Original In Stock
Battery Battery Monitor IC Multi-Chemistry 8-TSSOP
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5.0 / 5.0
- (320 Ratings)
BQ2019PW
Product Overview
1272899
DiGi Electronics Part Number
BQ2019PW-DGManufacturer
Texas Instruments
BQ2019PW
Description
IC BAT MON MULT-CHEM 1-3C 8TSSOPInventory
1381 Pcs New Original In Stock
Battery Battery Monitor IC Multi-Chemistry 8-TSSOP
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
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BQ2019PW Technical Specifications
Category
Power Management (PMIC), Battery Management
Packaging
Tube
Series
-
Product Status
Active
Function
Battery Monitor
Battery Chemistry
Multi-Chemistry
Number of Cells
1 ~ 3
Fault Protection
-
Interface
HDQ
Operating Temperature
-20°C ~ 70°C (TA)
Mounting Type
Surface Mount
Package / Case
8-TSSOP (0.173", 4.40mm Width)
Supplier Device Package
8-TSSOP
Base Product Number
BQ2019
Datasheet & Documents
HTML Datasheet
BQ2019PW-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
2156-BQ2019PW
-BQ2019PWG4
TEXTISBQ2019PW
-296-9348-5-DG
-BQ2019PW-NDR
296-9348-5-NDR
-296-9348-5
296-9348-5
-BQ2019PWG4-NDR
Standard Package
100
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
Der Kundenservice hat mir bei einer kleinen Reklamation sofort geholfen, extrem schnell reagiert.
de desembre 02, 2025
いつも時間厳守で、梱包もとても丁寧です。
de desembre 02, 2025
We appreciate their transparency in communicating potential issues and solutions in advance.
de desembre 02, 2025
DiGi Electronics excels in delivering products quickly and supporting customers afterward.
de desembre 02, 2025
The team’s friendliness makes every visit a pleasant experience.
de desembre 02, 2025
Tracking my package was very straightforward and reassuring.
de desembre 02, 2025
Their logistics process is highly efficient, ensuring fast delivery every time.
de desembre 02, 2025
DiGi Electronics provides great value with a smooth and intuitive online platform.
de desembre 02, 2025
DiGi Electronics consistently delivers reliable products that stand the test of time, making them a great investment for any gaming setup.
de desembre 02, 2025
Their post-sale assistance is thorough and genuinely helpful.
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Frequently Asked Questions (FAQ)
Can the BQ2019PW be used as a drop-in replacement for the MAX17055 in a 2S Li-ion battery pack design, and what firmware or calibration adjustments are needed?
The BQ2019PW is not a direct drop-in replacement for the MAX17055 due to fundamental architectural differences—the BQ2019PW uses an HDQ interface and requires host-side fuel-gauging algorithms, while the MAX17055 includes an integrated ModelGauge algorithm. To replace the MAX17055 with the BQ2019PW, you must implement custom coulomb counting and state-of-charge estimation in your host microcontroller, recalibrate voltage thresholds for 2S operation, and ensure HDQ communication compatibility. Additionally, the BQ2019PW lacks built-in protection features present in the MAX17055, so external protection circuitry becomes mandatory, increasing design complexity and risk if not properly validated.
What are the key reliability risks when using the BQ2019PW in a high-vibration industrial environment with frequent thermal cycling between -10°C and 60°C?
The BQ2019PW’s 8-TSSOP package has limited mechanical robustness under sustained vibration, and its specified operating temperature range (-20°C to 70°C) leaves minimal margin for transient spikes during thermal cycling. Repeated stress can cause solder joint fatigue or delamination, especially if PCB layout lacks adequate strain relief or thermal vias. To mitigate risk, use conformal coating, implement a robust grounding strategy with thermal relief pads, and validate long-term performance through accelerated life testing. Also, ensure your battery connector and sense lines are mechanically secured to prevent intermittent connections that could corrupt HDQ communication or current sensing.
How does the BQ2019PW handle multi-chemistry support when switching between Li-ion and LiFePO4 cells in the same application, and what configuration changes are required?
The BQ2019PW supports multi-chemistry operation but requires manual reconfiguration via host firmware when switching between Li-ion and LiFePO4 chemistries, as it does not auto-detect chemistry. You must adjust charge/discharge voltage thresholds, full-charge detection parameters, and termination currents in software. For example, LiFePO4 has a lower nominal voltage (3.2V vs. 3.7V), so using default Li-ion settings risks undercharging or misreporting state of charge. Always validate threshold settings against your specific cell datasheets and implement a chemistry-selection routine during system initialization to avoid unsafe operating conditions.
Is the BQ2019PW suitable for always-on battery monitoring in a low-power IoT device drawing <10µA sleep current, and how does its quiescent current impact system-level power budgeting?
While the BQ2019PW itself has low quiescent current, it requires continuous HDQ communication with a host MCU to function, which typically prevents true deep sleep modes. In an always-on IoT application with <10µA system sleep current, the BQ2019PW may dominate the power budget unless paired with a ultra-low-power microcontroller that can wake periodically for brief HDQ transactions. Consider instead a standalone fuel gauge like the BQ27441-G1, which integrates gauging and draws <5µA in shutdown. If you must use the BQ2019PW, optimize by minimizing polling frequency, using interrupt-driven communication, and ensuring the host MCU enters the lowest possible sleep state between readings.
What layout and grounding considerations are critical when designing a PCB with the BQ2019PW to ensure accurate current sensing in a 3-cell series configuration with high di/dt load transients?
Accurate current sensing with the BQ2019PW in a 3S configuration demands a star-ground topology with the sense resistor placed close to the IC’s SRP/SRN pins, using Kelvin connections to avoid IR drop errors. Route high-current paths away from analog traces, and isolate the BQ2019PW’s ground plane from noisy digital grounds using a single-point connection near the sense resistor. During high di/dt events (e.g., motor startup), ground bounce can corrupt measurements—mitigate this with a low-ESR bypass capacitor (100nF ceramic) directly at the VCC pin and consider adding a small RC filter (10Ω + 100nF) on the sense lines. Failure to follow these practices may result in ±10% or greater SOC error 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.
BQ2019PW CAD Models
Texas Instruments BQ2019PW PCB symbols & footprints
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