BQ2000TSN-B5 Equivalent & Substitute Parts

Part Overview

The BQ2000TSN-B5 is a multi-chemistry battery charger IC manufactured by Texas Instruments, designed for charging 1 to 4 cells with programmable current, timer, and voltage control. The device is packaged in 8-SOIC surface mount configuration with a maximum supply voltage of 6V and operates across -20°C to 70°C. Currently classified as Last Time Buy, this part requires identification of suitable alternatives for ongoing design requirements and inventory planning.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Battery Chemistry	Multi-Chemistry
Number of Cells	1 ~ 4
Current - Charging	Constant - Programmable
Programmable Features	Current, Timer, Voltage
Voltage - Supply (Max)	6V
Operating Temperature	-20°C ~ 70°C (TA)
Mounting Type	Surface Mount
Package / Case	8-SOIC (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the BQ2000TSN-B5 is determined by the following critical parameters: battery chemistry support, number of cells, programmable charging control, supply voltage compatibility, package type, and operating temperature range.

Two substitute parts are identified:

Parametric Equivalent (BQ2000SN-B5): Maintains identical electrical specifications and package configuration. Differs only in product status (Active vs. Last Time Buy) and packaging format (Tube). This represents a direct parametric replacement with no functional or electrical deviation.

Manufacturer Recommended Substitute (BQ25172DSGR): Extends battery chemistry support to Nickel Metal Hydride, increases cell count capability to 1-6 cells, and provides enhanced fault protection (Over Current, Over Temperature, Over Voltage, Short Circuit). However, this substitute operates at higher supply voltage (18V max vs. 6V max), uses a different package type (8-WFDFN Exposed Pad vs. 8-SOIC), and operates across a wider temperature range (-40°C ~ 125°C). This substitute is suitable only for applications where the increased supply voltage and expanded feature set are compatible with the target design.

Parameter Comparison

Parameter	BQ2000TSN-B5 (Main)	BQ2000SN-B5 (Parametric Equivalent)	BQ25172DSGR (Manufacturer Recommended)
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments
Product Status	Last Time Buy	Active	Active
Battery Chemistry	Multi-Chemistry	Multi-Chemistry	Nickel Metal Hydride
Number of Cells	1 ~ 4	1 ~ 4	1 ~ 6
Current - Charging	Constant - Programmable	Constant - Programmable	Constant - Programmable
Programmable Features	Current, Timer, Voltage	Current, Timer, Voltage	Current, Timer, Voltage
Voltage - Supply (Max)	6V	6V	18V
Operating Temperature	-20°C ~ 70°C (TA)	-20°C ~ 70°C (TA)	-40°C ~ 125°C (TJ)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-WFDFN Exposed Pad
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Not applicable
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For Direct Replacement: BQ2000SN-B5 is the appropriate selection when maintaining identical electrical and mechanical specifications is required. This part is in Active product status, ensuring long-term availability and supply chain stability. Both parts maintain ROHS3 compliance and identical MSL ratings.

For Extended Capability Applications: BQ25172DSGR is suitable only when the application design accommodates the increased maximum supply voltage (18V vs. 6V), accepts the different package footprint (8-WFDFN Exposed Pad vs. 8-SOIC), and benefits from extended cell count support (1-6 vs. 1-4) and enhanced fault protection features. This part is in Active product status and operates across an extended temperature range. RoHS compliance status differs and must be evaluated against application requirements.

Frequently Asked Questions (FAQ)

Q: Can BQ2000SN-B5 be used as a direct replacement for BQ2000TSN-B5?

A: Yes. BQ2000SN-B5 is a parametric equivalent with identical electrical specifications, cell count support, programmable features, supply voltage, operating temperature range, and package configuration. The only differences are product status (Active vs. Last Time Buy) and packaging format (Tube vs. Cut Tape). No circuit modifications are required.

Q: What are the limitations of using BQ25172DSGR as a substitute?

A: BQ25172DSGR operates at a maximum supply voltage of 18V compared to 6V for the BQ2000TSN-B5. The package type differs (8-WFDFN Exposed Pad vs. 8-SOIC), requiring PCB layout and footprint redesign. Battery chemistry support is limited to Nickel Metal Hydride rather than multi-chemistry. These differences necessitate circuit redesign and validation before implementation.

Q: Are there package compatibility concerns between the main part and substitutes?

A: BQ2000SN-B5 uses the identical 8-SOIC package and requires no PCB modifications. BQ25172DSGR uses 8-WFDFN Exposed Pad packaging, which has different pin pitch, thermal characteristics, and footprint requirements. PCB redesign is mandatory for BQ25172DSGR implementation.

Q: What compliance certifications apply to each part?

A: BQ2000TSN-B5 and BQ2000SN-B5 are both ROHS3 compliant with MSL rating of 1 (Unlimited). BQ25172DSGR has RoHS status listed as Not applicable and must be evaluated against specific application compliance requirements.

Q: Which substitute should be selected for new designs?

A: For new designs requiring multi-chemistry charging of 1-4 cells at 6V supply, BQ2000SN-B5 is the appropriate selection due to its Active product status and identical specifications. BQ25172DSGR should be selected only when the application specifically requires Nickel Metal Hydride chemistry, 1-6 cell support, higher supply voltage capability, or enhanced fault protection features.

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