BQ24151AYFFR Equivalent & Substitute Parts

Part Overview

The BQ24151AYFFR is a lithium-ion/polymer battery charger IC manufactured by Texas Instruments, housed in a 20-DSBGA package. This single-cell charger provides programmable charging current, timer, and voltage control with integrated over-temperature and over-voltage protection. The part is classified as "Not For New Designs," indicating it has reached end-of-life status. Alternative parts from the BQ24150 and BQ24157 series are available to support ongoing production requirements and new design initiatives.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Battery Chemistry	Lithium Ion/Polymer
Number of Cells	1
Charge Current - Max	1.25A
Battery Pack Voltage (Max)	4.44V
Voltage - Supply (Max)	6V
Interface	I2C
Operating Temperature	-40°C ~ 85°C
Package / Case	20-UFBGA, DSBGA
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the BQ24151AYFFR is determined by the following criteria:

Critical Parameters for Substitution:

Battery Chemistry: Lithium Ion/Polymer
Number of Cells: 1
Package / Case: 20-UFBGA, DSBGA
Interface: I2C
Voltage - Supply (Max): 6V
Battery Pack Voltage (Max): 4.44V
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Allowed Variation Parameters:

Charge Current - Max: 1.25A (BQ24150, BQ24151, BQ24152 series) or 1.55A (BQ24157 series)
Operating Temperature: -40°C ~ 85°C (BQ24150, BQ24151, BQ24152) or -30°C ~ 85°C (BQ24157)
Programmable Features: Current only (BQ24157) or Current, Timer, Voltage (BQ24150, BQ24151, BQ24152)
Product Status: Active or Not For New Designs

All substitute parts maintain identical electrical interfaces, power supply requirements, and physical packaging, ensuring direct functional compatibility within the specified parameter ranges.

Parameter Comparison

Part Number	Manufacturer	Charge Current - Max	Operating Temperature	Programmable Features	Product Status	Inventory (Pcs)
BQ24151AYFFR	Texas Instruments	1.25A	-40°C ~ 85°C	Current, Timer, Voltage	Not For New Designs	4225
BQ24157YFFR	Texas Instruments	1.55A	-30°C ~ 85°C	Current	Active	305300
BQ24150AYFFR	Texas Instruments	1.25A	-40°C ~ 85°C	Current, Timer, Voltage	Active	1097
BQ24150AYFFT	Texas Instruments	1.25A	-40°C ~ 85°C	Current, Timer, Voltage	Active	1337
BQ24151AYFFT	Texas Instruments	1.25A	-40°C ~ 85°C	Current, Timer, Voltage	Not For New Designs	945
BQ24152YFFR	Texas Instruments	1.25A	-40°C ~ 85°C	Current, Timer, Voltage	Not For New Designs	19100
BQ24152YFFT	Texas Instruments	1.25A	-40°C ~ 85°C	Current, Timer, Voltage	Not For New Designs	19100

Engineering Selection Recommendations

For Active Production (New Designs): BQ24150AYFFR and BQ24150AYFFT are the primary recommended substitutes. Both parts maintain identical electrical specifications to the BQ24151AYFFR, including 1.25A maximum charge current, full programmable feature set (Current, Timer, Voltage), and -40°C ~ 85°C operating temperature range. Both carry Active product status and ROHS3 compliance. The choice between YFFR (Tape & Reel) and AYFFT packaging variants depends on assembly requirements.

For Extended Temperature Range: BQ24150AYFFR and BQ24150AYFFT support the full -40°C ~ 85°C operating temperature specification, matching the original BQ24151AYFFR thermal envelope.

For Higher Charge Current Capability: BQ24157YFFR provides 1.55A maximum charge current with Active product status and ROHS3 compliance. This part operates within -30°C ~ 85°C, which is acceptable for applications not requiring the full -40°C lower temperature limit. The BQ24157YFFR offers significantly higher inventory availability (305,300 units).

Compliance Considerations: All substitute parts maintain ROHS3 compliance, Moisture Sensitivity Level 1 (Unlimited), and identical supply voltage and battery pack voltage specifications. All parts are manufactured by Texas Instruments and use the same 20-DSBGA package.

Frequently Asked Questions (FAQ)

Q: Can BQ24157YFFR replace BQ24151AYFFR in all applications? A: BQ24157YFFR is functionally compatible for applications operating within -30°C ~ 85°C. Applications requiring operation below -30°C must use BQ24150AYFFR or BQ24150AYFFT. BQ24157YFFR provides higher charge current (1.55A vs. 1.25A) and offers programmable current control only, without timer and voltage programmability.

Q: What is the difference between YFFR and AYFFT packaging? A: Both are surface-mount 20-DSBGA packages. YFFR indicates Tape & Reel packaging, while AYFFT also indicates Tape & Reel with different lead-free finish specifications. Both are mechanically and electrically identical for PCB assembly purposes.

Q: Why is BQ24151AYFFR marked "Not For New Designs"? A: This designation indicates the part has reached end-of-life status. Texas Instruments recommends BQ24150 and BQ24157 series parts for new design initiatives. Existing inventory remains available for legacy production support.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance and Moisture Sensitivity Level 1 (Unlimited), matching the original BQ24151AYFFR environmental specifications.

Q: What is the key difference between BQ24150 and BQ24157 series? A: BQ24150 series supports programmable Current, Timer, and Voltage with 1.25A maximum charge current and -40°C ~ 85°C operating range. BQ24157 series supports programmable Current only with 1.55A maximum charge current and -30°C ~ 85°C operating range. Both use identical I2C interface and 20-DSBGA packaging.

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