BQ29311PWR Equivalent & Substitute Parts

Part Overview

The BQ29311PWR is a battery protection IC designed for lithium ion and polymer battery applications. This Surface Mount device in 24-TSSOP packaging provides comprehensive fault protection including over-current, over/under-voltage, and short-circuit detection via I2C interface. The part is currently Active in product status with 19,009 units in stock. Alternative parts may be required due to inventory constraints, supply chain considerations, or design revision updates.

Substiute Parts

BQ29311PWR

Texas InstrumentsIn Stock: 19110BQ29311PWR Datasheet

Current PartRFQ

BQ29311PWRG4

Texas InstrumentsIn Stock: 8808BQ29311PWRG4 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the BQ29311PWR is determined by strict equivalence across the following critical parameters:

Manufacturer and Base Product Number: Both the main part and substitute must originate from Texas Instruments and share the base product number BQ29311 to ensure functional and electrical equivalence.

Package and Mounting: The 24-TSSOP Surface Mount package is mandatory for PCB compatibility and assembly process alignment.

Functional Specifications: Battery protection function, lithium ion/polymer chemistry support, and fault protection capabilities (over-current, over/under-voltage, short-circuit) must be identical.

Interface and Communication: I2C interface compatibility is required for system integration.

Environmental and Compliance Standards: Operating temperature range (-25°C ~ 85°C), RoHS3 compliance, and MSL rating must match to ensure reliability and regulatory adherence.

The BQ29311PWRG4 meets all these criteria and is classified as a parametric equivalent substitute.

Parameter Comparison

Engineering Selection Recommendations

The BQ29311PWR is the preferred primary selection due to its Active product status and higher inventory availability (19,009 units). This ensures long-term supply continuity and support from Texas Instruments.

The BQ29311PWRG4 is a valid parametric equivalent for applications requiring immediate substitution. However, note that this part is Discontinued at DiGi Electronics, which may impact future availability. Both parts carry identical electrical specifications, package dimensions, compliance certifications (ROHS3, REACH Unaffected), and environmental ratings, making them functionally interchangeable in lithium ion/polymer battery protection circuits.

Selection between these parts should prioritize the BQ29311PWR for new designs and long-term production. The BQ29311PWRG4 may be used as a secondary option when primary part availability is constrained, provided that existing inventory is confirmed and supply chain risk is acceptable.

Frequently Asked Questions (FAQ)

Q: Are BQ29311PWR and BQ29311PWRG4 pin-for-pin compatible?

A: Yes. Both parts use the identical 24-TSSOP package with matching pin assignments, enabling direct substitution on the PCB without layout modifications.

Q: Can I use BQ29311PWRG4 in production if BQ29311PWR is unavailable?

A: The BQ29311PWRG4 is electrically and functionally equivalent and meets all specified parameters. However, verify current inventory status before committing to production, as this part is discontinued at DiGi Electronics.

Q: What are the key parameters that determine substitutability?

A: Substitutability is determined by: manufacturer (Texas Instruments), base product number (BQ29311), package type (24-TSSOP), battery chemistry support (Lithium Ion/Polymer), fault protection capabilities (over-current, over/under-voltage, short-circuit), I2C interface, operating temperature range (-25°C ~ 85°C), and compliance certifications (ROHS3, REACH Unaffected).

Q: Does the MSL rating affect substitution?

A: No. Both parts carry MSL 1 (Unlimited), indicating no moisture sensitivity constraints. This parameter is identical across both parts and does not restrict substitution.

Q: Are there any compliance or regulatory differences between these parts?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications. Regulatory and compliance profiles are equivalent.

Q: What is the difference between BQ29311PWR and BQ29311PWRG4?

A: The primary difference is product status and inventory. BQ29311PWR is Active with 19,009 units in stock, while BQ29311PWRG4 is Discontinued at DiGi Electronics with 8,700 units available. All electrical and mechanical specifications are identical.