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BQ20Z95DBT
Texas Instruments
IC GAS GAUGE LI-ION 2-4C 44TSSOP
2074 Pcs New Original In Stock
Battery Multi-Function Controller IC Lithium Ion/Polymer 44-TSSOP
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5.0 / 5.0
- (121 Ratings)
BQ20Z95DBT
Product Overview
1253307
DiGi Electronics Part Number
BQ20Z95DBT-DGManufacturer
Texas Instruments
BQ20Z95DBT
Description
IC GAS GAUGE LI-ION 2-4C 44TSSOPInventory
2074 Pcs New Original In Stock
Battery Multi-Function Controller IC Lithium Ion/Polymer 44-TSSOP
Quantity
Minimum 1
Minimum 1
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BQ20Z95DBT Technical Specifications
Category
Power Management (PMIC), Battery Management
Packaging
-
Series
Impedance Track™
Product Status
Obsolete
Function
Multi-Function Controller
Battery Chemistry
Lithium Ion/Polymer
Number of Cells
2 ~ 4
Fault Protection
Over Current, Over Temperature, Over/Under Voltage, Short Circuit
Interface
SMBus
Operating Temperature
-40°C ~ 85°C (TA)
Mounting Type
Surface Mount
Package / Case
44-TFSOP (0.173", 4.40mm Width)
Supplier Device Package
44-TSSOP
Base Product Number
BQ20Z95
Datasheet & Documents
HTML Datasheet
BQ20Z95DBT-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
296-22543-5-NDR
-296-22543-5
-296-22543-5-NDR
TEXTISBQ20Z95DBT
296-22543-5
-BQ20Z95DBT-NDR
2156-BQ20Z95DBT
-BQ20Z95DBTG4-NDR
-BQ20Z95DBTG4
-296-22543-5-DG
Standard Package
40
Alternative Parts
View DetailsPART 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
배송이 빠르고 포장도 견고하게 되어 있어서 걱정 없었어요.
de desembre 02, 2025
配送の早さと包装の丁寧さは他に負けません。非常に満足しています。
de desembre 02, 2025
The professionalism of their customer service team is truly impressive, always ready to assist.
de desembre 02, 2025
The post-purchase support experience with DiGi Electronics is always positive.
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Frequently Asked Questions (FAQ)
What are the key design-in risks when using the BQ20Z95DBT in a new battery management system given its obsolete status?
Using the BQ20Z95DBT in new designs carries significant supply chain risks due to its obsolete status from Texas Instruments. While 2002 units are available now, long-term availability is not guaranteed, which can jeopardize mass production or product lifecycle support. Engineers should evaluate drop-in replacements like the BQ20Z65DBT-R1 or BQ20Z655DBT early in the design phase and assess firmware compatibility, as these alternatives use similar Impedance Track™ technology but may differ in register mapping or SMBus commands. Consider securing last-time buy quantities or redesigning with active-status gas gauges such as the BQ34Z100-G1 for extended availability and technical support.
How does the BQ20Z95DBT handle cell imbalance in 3- or 4-cell lithium-ion packs, and what integration challenges should be anticipated?
The BQ20Z95DBT provides voltage monitoring and fault protection but does not include active cell balancing; it relies on external circuitry for balancing functions. In 3- or 4-cell series configurations, this means designers must integrate a separate battery balancing IC or rely on the charger system to manage imbalance. Failure to address this can lead to reduced pack capacity, premature shutdown, or safety risks. Ensure your charger or protection circuit complements the BQ20Z95DBT by providing passive or active balancing, and verify coordination between overvoltage thresholds and balancing triggers during charge cycles.
Can the BQ20Z95DBT be reliably used in high-temperature industrial applications near 85°C, and what are the reliability trade-offs?
The BQ20Z95DBT is rated for operation up to 85°C (TA), but prolonged exposure to temperatures near this limit can affect the accuracy of the Impedance Track™ fuel gauging algorithm and accelerate aging of both the IC and battery. In high-temperature environments, thermal derating is recommended. Ensure adequate PCB heatsinking and avoid placing the BQ20Z95DBT near heat-generating components. Also, monitor the die temperature via SMBus if possible, and consider that gauge calibration data may drift over time under thermal stress, requiring more frequent recalibration or end-of-discharge verification in critical applications.
What are the critical differences between the BQ20Z95DBT and its potential replacement BQ20Z655DBT in terms of SMBus communication and firmware compatibility?
While the BQ20Z655DBT is listed as a substitute for the BQ20Z95DBT, there are differences in register maps, SMBus command sets, and Impedance Track™ implementation that can affect firmware compatibility. The BQ20Z655DBT may require updated device drivers or host controller code to interpret fuel gauge data correctly. Additionally, alarm thresholds and fault reporting behavior may vary. Always cross-check the 'Data Memory Organization' and 'SMBus Communication' sections in both datasheets, and test the BQ20Z655DBT with existing host firmware to ensure seamless integration before full-scale replacement.
How does the BQ20Z95DBT respond to short-circuit events on a 4-cell Li-ion battery pack, and what are the recommended post-fault recovery procedures?
The BQ20Z95DBT includes integrated short-circuit protection that disables the discharge path via the control FET when excessive current is detected, typically within microseconds. After a short-circuit event, the device latches into a fault state and requires a host system intervention via the SMBus to clear the fault register before normal operation can resume. It is critical to ensure that downstream circuitry is not damaged during the event and that the host processor is programmed to detect the FAULT# pin assertion and initiate recovery only after the short has been removed. Additionally, verify that your protection MOSFETs are rated for the peak fault current to prevent failure upstream of the BQ20Z95DBT.
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.
BQ20Z95DBT CAD Models
Texas Instruments BQ20Z95DBT PCB symbols & footprints
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