BQ24401D Equivalent & Substitute Parts

Part Overview

The BQ24401D is a multi-chemistry battery charger IC manufactured by Texas Instruments, designed for surface mount applications in 8-SOIC packaging. This device is classified as Last Time Buy, indicating it is no longer in active production. The part supports programmable timer functionality and operates across a supply voltage range up to 6V with an operating temperature range of -20°C to 70°C. Due to its Last Time Buy status, identifying functionally compatible substitute components is essential for ongoing design support and production continuity.

Substiute Parts

BQ24401D

Texas InstrumentsIn Stock: 3407BQ24401D Datasheet

Current PartRFQ

BQ25172DSGR

Texas InstrumentsIn Stock: 39785BQ25172DSGR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The BQ25172DSGR is identified as a manufacturer-recommended substitute for the BQ24401D. Substitution eligibility is determined by the following criteria:

Functional Compatibility: Both devices are Texas Instruments battery charger ICs within the Power Management (PMIC) category, designed for multi-cell battery charging applications.

Programmable Capability: Both parts support programmable timer functionality, meeting the control requirements of the original design.

Surface Mount Technology: Both components utilize surface mount packaging, maintaining compatibility with existing PCB assembly processes.

Supply Voltage Consideration: The BQ25172DSGR operates at a maximum supply voltage of 18V, which exceeds the BQ24401D's 6V maximum. This represents an expanded operating range suitable for designs requiring higher input voltages.

Thermal Operating Range: The BQ25172DSGR extends the operating temperature range to -40°C ~ 125°C (TJ), providing broader environmental compatibility compared to the BQ24401D's -20°C ~ 70°C range.

Compliance Status: Both parts maintain RoHS compliance and MSL Level 1 ratings, ensuring regulatory and moisture handling consistency.

Parameter Comparison

Engineering Selection Recommendations

For Last Time Buy Mitigation: The BQ24401D's Last Time Buy status necessitates component transition planning. The BQ25172DSGR, with Active product status, provides long-term availability and production continuity.

For Compliance Requirements: Both components maintain MSL Level 1 ratings and equivalent moisture handling specifications. The BQ25172DSGR's Not Applicable RoHS status should be evaluated against specific regulatory requirements for the target application.

For Thermal Environment: Applications requiring operation beyond the BQ24401D's -20°C ~ 70°C range benefit from the BQ25172DSGR's extended -40°C ~ 125°C operating window.

For Supply Voltage Architecture: Designs operating at supply voltages exceeding 6V require the BQ25172DSGR's 18V maximum rating. Designs constrained to 6V or below may use either component based on other selection criteria.

For Programmable Control: The BQ25172DSGR provides expanded programmable features (Current, Timer, Voltage) compared to the BQ24401D's Timer-only capability, enabling more granular charge profile control.

Frequently Asked Questions (FAQ)

Q: Can the BQ25172DSGR directly replace the BQ24401D in existing designs?

A: Direct replacement requires verification of supply voltage requirements and thermal operating conditions. The BQ25172DSGR's higher maximum supply voltage (18V vs. 6V) and extended temperature range (-40°C ~ 125°C vs. -20°C ~ 70°C) make it suitable for most applications. However, PCB layout and firmware adjustments may be necessary due to package differences (8-WSON vs. 8-SOIC) and expanded programmable features.

Q: What are the package differences between these components?

A: The BQ24401D uses 8-SOIC (0.154", 3.90mm Width) packaging, while the BQ25172DSGR uses 8-WFDFN Exposed Pad (8-WSON 2x2) packaging. These are different footprints requiring PCB redesign for physical compatibility.

Q: Are there battery chemistry limitations with the BQ25172DSGR?

A: The BQ25172DSGR is specified for Nickel Metal Hydride (NiMH) chemistry with support for 1 to 6 cells. The BQ24401D supports multi-chemistry applications. Verify that the target battery chemistry is compatible with the BQ25172DSGR's specifications before substitution.

Q: What is the significance of the BQ24401D's Last Time Buy status?

A: Last Time Buy indicates the manufacturer is discontinuing production. Existing inventory may be available for a limited period. The BQ25172DSGR's Active status ensures ongoing availability for new designs and production requirements.

Q: How do the programmable features differ between these parts?

A: The BQ24401D supports programmable Timer functionality only. The BQ25172DSGR supports programmable Current, Timer, and Voltage settings, providing enhanced charge profile customization. Designs utilizing only timer programmability can transition without feature loss.

Q: Are there compliance or certification differences?

A: The BQ24401D is ROHS3 Compliant with specified REACH and ECCN classifications. The BQ25172DSGR lists RoHS status as Not Applicable. Verify compliance requirements for your specific application and regulatory jurisdiction before substitution.