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AP9101CK-BFTRG1 Equivalent & Substitute Parts
Part Overview
The AP9101CK-BFTRG1 is a Battery Protection IC for single-cell Lithium Ion/Polymer applications, manufactured by Diodes Incorporated in SOT-25 package. This device provides over-current and over-voltage fault protection for battery management systems. The part is currently in Active product status with 905 units in stock.
Equivalent and substitute parts are necessary when the primary part number becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when design flexibility across compatible variants is needed for supply chain optimization.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Category | Power Management (PMIC) |
| Function | Battery Protection |
| Battery Chemistry | Lithium Ion/Polymer |
| Number of Cells | 1 |
| Fault Protection | Over Current, Over Voltage |
| Operating Temperature Range | -40°C ~ 85°C (TA) |
| Package / Case | SC-74A, SOT-753 |
| Supplier Device Package | SOT-25 |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| MSL Rating | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution eligibility for AP9101CK-BFTRG1 is determined by the following critical parameters:
- Base Product Number: AP9101
- Battery Chemistry: Lithium Ion/Polymer
- Number of Cells: 1
- Fault Protection: Over Current, Over Voltage
- Package / Case: SC-74A, SOT-753
- Supplier Device Package: SOT-25
- Operating Temperature Range: -40°C ~ 85°C (TA)
- Mounting Type: Surface Mount
- RoHS Status: ROHS3 Compliant
- MSL Rating: 1 (Unlimited)
All substitute parts listed maintain identical electrical specifications and thermal performance. Variations exist only in packaging format (Tape & Reel vs. Cut Tape) and product status. Packaging format differences do not affect electrical compatibility or functional performance.
Parameter Comparison
| Part Number | Manufacturer | Packaging | Product Status | Inventory (Pcs) | Battery Chemistry | Fault Protection | Operating Temp | Package Type | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|
| AP9101CK-BFTRG1 | Diodes Incorporated | Tape & Reel (TR) | Active | 905 | Lithium Ion/Polymer | Over Current, Over Voltage | -40°C ~ 85°C | SOT-25 | ROHS3 Compliant |
| AP9101CAK-ABTRG1 | Diodes Incorporated | Cut Tape (CT) & Digi-Reel® | Obsolete | 3100 | Lithium Ion/Polymer | Over Current, Over Voltage | -40°C ~ 85°C | SOT-25 | ROHS3 Compliant |
| AP9101CAK-AKTRG1 | Diodes Incorporated | Cut Tape (CT) & Digi-Reel® | Obsolete | 8700 | Lithium Ion/Polymer | Over Current, Over Voltage | -40°C ~ 85°C | SOT-25 | ROHS3 Compliant |
| AP9101CAK-ANTRG1 | Diodes Incorporated | Cut Tape (CT) | Obsolete | 9300 | Lithium Ion/Polymer | Over Current, Over Voltage | -40°C ~ 85°C | SOT-25 | ROHS3 Compliant |
| AP9101CAK-BRTRG1 | Diodes Incorporated | Tape & Reel (TR) | Obsolete | 3946 | Lithium Ion/Polymer | Over Current, Over Voltage | -40°C ~ 85°C | SOT-25 | ROHS3 Compliant |
| AP9101CAK-CPTRG1 | Diodes Incorporated | Tape & Reel (TR) | Obsolete | 3732 | Lithium Ion/Polymer | Over Current, Over Voltage | -40°C ~ 85°C | SOT-25 | ROHS3 Compliant |
| AP9101CK-AHTRG1 | Diodes Incorporated | Cut Tape (CT) & Digi-Reel® | Obsolete | 14500 | Lithium Ion/Polymer | Over Current, Over Voltage | -40°C ~ 85°C | SOT-25 | ROHS3 Compliant |
| AP9101CK-AKTRG1 | Diodes Incorporated | Cut Tape (CT) | Obsolete | 3820 | Lithium Ion/Polymer | Over Current, Over Voltage | -40°C ~ 85°C | SOT-25 | ROHS3 Compliant |
| AP9101CK-ASTRG1 | Diodes Incorporated | Cut Tape (CT) | Obsolete | 9400 | Lithium Ion/Polymer | Over Current, Over Voltage | -40°C ~ 85°C | SOT-25 | ROHS3 Compliant |
| AP9101CK-AUTRG1 | Diodes Incorporated | Cut Tape (CT) | Obsolete | 4300 | Lithium Ion/Polymer | Over Current, Over Voltage | -40°C ~ 85°C | SOT-25 | ROHS3 Compliant |
| BQ29706DSER | Texas Instruments | Cut Tape (CT) & Digi-Reel® | Active | 61600 | Lithium Ion/Polymer | Over Current, Over/Under Voltage, Short Circuit | -40°C ~ 85°C | 6-WSON (1.5x1.5) | ROHS3 Compliant |
Engineering Selection Recommendations
Within the Diodes Incorporated AP9101 family, all variants are electrically and functionally equivalent. Selection between AP9101CK-BFTRG1 and other AP9101 variants depends on packaging requirements and product lifecycle status:
- AP9101CK-BFTRG1 is the recommended choice for new designs due to Active product status and Tape & Reel packaging suitable for automated assembly.
- AP9101CAK-ABTRG1, AP9101CAK-AKTRG1, AP9101CAK-ANTRG1, AP9101CAK-BRTRG1, AP9101CAK-CPTRG1, AP9101CK-AHTRG1, AP9101CK-AKTRG1, AP9101CK-ASTRG1, and AP9101CK-AUTRG1 are classified as Obsolete. These variants are electrically compatible but carry obsolescence risk for long-term supply continuity.
BQ29706DSER (Texas Instruments) is a manufacturer-recommended alternative with Active product status and significantly higher inventory availability (61600 units). This part maintains single-cell Lithium Ion/Polymer protection with expanded fault detection (Over Current, Over/Under Voltage, Short Circuit). However, BQ29706DSER uses a different package format (6-WSON vs. SOT-25), requiring PCB layout and assembly process modifications. This part is suitable only when design flexibility permits package change.
Frequently Asked Questions (FAQ)
Q: Can AP9101CK-BFTRG1 be directly replaced with any AP9101 variant?
A: Yes. All AP9101 variants listed share identical electrical specifications, thermal performance, and functional protection features. Differences are limited to packaging format (Tape & Reel vs. Cut Tape) and product lifecycle status. Direct pin-for-pin substitution is supported without circuit modification.
Q: What is the difference between Tape & Reel and Cut Tape packaging?
A: Tape & Reel (TR) packaging is supplied on continuous carrier tape suitable for automated pick-and-place assembly equipment. Cut Tape (CT) packaging is supplied as individual tape segments. Both formats contain identical components. Selection depends on manufacturing process requirements and equipment compatibility.
Q: Why are most AP9101 variants marked as Obsolete?
A: Product status reflects manufacturer lifecycle classification. Obsolete parts may still be available from inventory but are no longer in active production. For new designs requiring long-term supply assurance, AP9101CK-BFTRG1 (Active status) is preferred.
Q: Is BQ29706DSER a direct replacement for AP9101CK-BFTRG1?
A: BQ29706DSER is functionally equivalent for single-cell Lithium Ion/Polymer battery protection but uses a different package format (6-WSON vs. SOT-25). PCB layout and assembly process changes are required. BQ29706DSER offers expanded fault protection (under-voltage and short-circuit detection) and higher inventory availability. Use only when design modifications are acceptable.
Q: Are all listed parts RoHS3 compliant?
A: Yes. All AP9101 variants and BQ29706DSER are ROHS3 Compliant with MSL Rating 1 (Unlimited moisture sensitivity level).
Q: What operating temperature range applies to all substitutes?
A: All listed parts operate across -40°C to 85°C (TA), supporting identical thermal performance requirements.
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