BQ24187YFFT Equivalent & Substitute Parts

Part Overview

The BQ24187YFFT is a single-cell lithium-ion battery charger IC manufactured by Texas Instruments in a 36-DSBGA package. This device is classified as obsolete, making equivalent and substitute parts necessary for new designs and production continuity. The BQ24187YFFT provides constant-current charging with programmable current control, over-temperature and over-voltage protection, and I2C interface communication. With a maximum charge current of 2A and maximum battery pack voltage of 4.44V, this charger is designed for single-cell lithium-ion battery applications requiring compact surface-mount solutions.

Substiute Parts

BQ24187YFFT

Texas InstrumentsIn Stock: 1068BQ24187YFFT Datasheet

Current PartRFQ

BQ25601DRTWR

Texas InstrumentsIn Stock: 23144BQ25601DRTWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BQ24187YFFT is determined by the following critical parameters:

• Single-cell lithium-ion battery chemistry support
• I2C digital interface for charge control
• Programmable charging current capability
• Operating temperature range of -40°C to 85°C
• Surface-mount technology compatibility
• ROHS3 compliance and regulatory alignment

The BQ25601DRTWR qualifies as a substitute based on these criteria. Both devices support single-cell lithium-ion/polymer battery charging with I2C interface control and programmable current features. Both operate across the same temperature range and maintain ROHS3 compliance. The primary differences lie in package form factor, maximum charge current capability, and enhanced fault protection features in the substitute part.

Parameter Comparison

Engineering Selection Recommendations

The BQ25601DRTWR is the recommended substitute for the obsolete BQ24187YFFT. Both devices maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for new designs. The BQ25601DRTWR offers active product status, providing long-term availability and manufacturing support compared to the obsolete BQ24187YFFT.

The BQ25601DRTWR provides enhanced capabilities including higher maximum charge current (3A versus 2A), higher maximum supply voltage (14.6V versus 6V), and expanded fault protection with short-circuit detection. The substitute supports both lithium-ion and lithium-polymer battery chemistries, offering broader application flexibility. Programmable voltage control in the BQ25601DRTWR provides additional charging profile customization beyond the current-only programmability of the BQ24187YFFT.

Package form factor differs between the two devices: the BQ24187YFFT uses 36-DSBGA while the BQ25601DRTWR uses 24-WQFN. PCB layout and footprint redesign is required for substitution.

Frequently Asked Questions (FAQ)

Q: Can the BQ25601DRTWR directly replace the BQ24187YFFT without circuit modifications?

A: Direct pin-for-pin replacement is not possible due to different package types (36-DSBGA versus 24-WQFN). PCB layout redesign and footprint changes are required. However, the functional I2C interface and charging control logic are compatible, allowing circuit topology reuse with package-specific modifications.

Q: What are the key compatibility criteria for substituting the BQ24187YFFT?

A: Substitute parts must support single-cell lithium-ion battery charging, provide I2C digital interface control, include programmable charging current capability, operate across -40°C to 85°C temperature range, and maintain ROHS3 compliance. The BQ25601DRTWR meets all these criteria.

Q: Does the BQ25601DRTWR support the same battery voltage range as the BQ24187YFFT?

A: The BQ25601DRTWR supports a higher maximum battery pack voltage of 4.62V compared to the BQ24187YFFT at 4.44V. This provides compatibility with single-cell lithium-ion batteries within the BQ24187YFFT operating range while offering additional headroom for battery pack variations.

Q: What is the impact of the higher maximum charge current in the BQ25601DRTWR?

A: The BQ25601DRTWR supports 3A maximum charge current versus 2A in the BQ24187YFFT. Designs can maintain the original 2A charging profile through programmable current settings, or leverage the higher current capability for faster charging in new applications.

Q: Are there supply voltage considerations when substituting these parts?

A: The BQ25601DRTWR accepts supply voltages up to 14.6V compared to 6V maximum for the BQ24187YFFT. Existing power supply designs operating at or below 6V remain compatible. The higher voltage rating provides flexibility for applications requiring higher input voltage sources.