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AP9101CAK-BSTRG1 Equivalent & Substitute Parts
Part Overview
The AP9101CAK-BSTRG1 is a battery protection IC for single-cell lithium ion/polymer applications, manufactured by Diodes Incorporated. This Surface Mount device in SOT-25 packaging provides over-current and over-voltage fault protection. The part is currently Active in product status with 1003 units in stock.
Substitute parts are necessary when the primary part becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when design revisions call for equivalent functionality from the same or alternative manufacturers.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| 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) |
| Mounting Type | Surface Mount |
| Package / Case | SC-74A, SOT-753 |
| Supplier Device Package | SOT-25 |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution eligibility for the AP9101CAK-BSTRG1 is determined by the following criteria:
Primary Substitution Criteria (Must Match):
- 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)
- Mounting Type: Surface Mount
- RoHS Status: ROHS3 Compliant
Secondary Substitution Criteria (Flexible):
- Packaging format (Tape & Reel, Cut Tape, Cut Tape & Digi-Reel)
- Product Status (Active or Obsolete)
- Inventory availability
All Diodes Incorporated AP9101 variants listed meet the primary substitution criteria. The Texas Instruments BQ29703DSER is listed as a manufacturer-recommended alternative, with the distinction of providing additional short-circuit protection and a different package format (6-WSON).
Parameter Comparison
| Part Number | Manufacturer | Product Status | Packaging | Package / Case | Fault Protection | Operating Temperature | Inventory (Pcs) |
|---|---|---|---|---|---|---|---|
| AP9101CAK-BSTRG1 | Diodes Incorporated | Active | Tape & Reel (TR) | SC-74A, SOT-753 | Over Current, Over Voltage | -40°C ~ 85°C | 1003 |
| AP9101CAK-ABTRG1 | Diodes Incorporated | Obsolete | Cut Tape (CT) & Digi-Reel® | SC-74A, SOT-753 | Over Current, Over Voltage | -40°C ~ 85°C | 3100 |
| AP9101CAK-AKTRG1 | Diodes Incorporated | Obsolete | Cut Tape (CT) & Digi-Reel® | SC-74A, SOT-753 | Over Current, Over Voltage | -40°C ~ 85°C | 8700 |
| AP9101CAK-ANTRG1 | Diodes Incorporated | Obsolete | Cut Tape (CT) | SC-74A, SOT-753 | Over Current, Over Voltage | -40°C ~ 85°C | 9300 |
| AP9101CAK-BRTRG1 | Diodes Incorporated | Obsolete | Tape & Reel (TR) | SC-74A, SOT-753 | Over Current, Over Voltage | -40°C ~ 85°C | 3946 |
| AP9101CAK-CPTRG1 | Diodes Incorporated | Obsolete | Tape & Reel (TR) | SC-74A, SOT-753 | Over Current, Over Voltage | -40°C ~ 85°C | 3732 |
| AP9101CK-AHTRG1 | Diodes Incorporated | Obsolete | Cut Tape (CT) & Digi-Reel® | SC-74A, SOT-753 | Over Current, Over Voltage | -40°C ~ 85°C | 14500 |
| AP9101CK-AKTRG1 | Diodes Incorporated | Obsolete | Cut Tape (CT) | SC-74A, SOT-753 | Over Current, Over Voltage | -40°C ~ 85°C | 3820 |
| AP9101CK-ASTRG1 | Diodes Incorporated | Obsolete | Cut Tape (CT) | SC-74A, SOT-753 | Over Current, Over Voltage | -40°C ~ 85°C | 9400 |
| AP9101CK-AUTRG1 | Diodes Incorporated | Obsolete | Cut Tape (CT) | SC-74A, SOT-753 | Over Current, Over Voltage | -40°C ~ 85°C | 4300 |
| BQ29703DSER | Texas Instruments | Active | Tape & Reel (TR) | 6-WFDFN | Over Current, Over/Under Voltage, Short Circuit | -40°C ~ 85°C | 18025 |
Engineering Selection Recommendations
For Diodes Incorporated AP9101 Series Variants:
All AP9101 variants share identical electrical specifications and fault protection capabilities. Selection among these parts should be based on packaging requirements and product status considerations. The Active status of AP9101CAK-BSTRG1 makes it the preferred choice for new designs. Obsolete variants remain functionally equivalent but may face supply constraints.
Packaging format selection depends on assembly process requirements: Tape & Reel (TR) packaging suits high-volume automated assembly, while Cut Tape (CT) and Cut Tape & Digi-Reel® formats accommodate lower-volume or mixed-component operations.
For Texas Instruments BQ29703DSER:
The BQ29703DSER is a manufacturer-recommended alternative with Active product status and higher inventory availability (18025 units). This part provides expanded fault protection including short-circuit detection and under-voltage monitoring, beyond the over-current and over-voltage protection of the AP9101 series. The 6-WSON package differs from the SOT-25 package of the AP9101, requiring PCB layout and footprint modifications. This substitution is appropriate when enhanced protection features are required or when design flexibility permits package format changes.
Both the AP9101CAK-BSTRG1 and BQ29703DSER maintain ROHS3 compliance and identical operating temperature ranges, ensuring regulatory and thermal compatibility.
Frequently Asked Questions (FAQ)
Q: Can AP9101 variants with different packaging formats be used interchangeably?
A: Yes, all AP9101 variants listed are electrically equivalent. Packaging format differences (Tape & Reel, Cut Tape, Cut Tape & Digi-Reel) affect only the delivery and handling method, not component functionality. PCB footprints and assembly processes remain identical across all variants.
Q: What is the difference between Active and Obsolete product status?
A: Active status indicates the manufacturer continues production and supports the part. Obsolete status indicates the manufacturer has discontinued production. Functionally obsolete parts remain suitable for use but may face future supply unavailability. For new designs, Active parts are recommended.
Q: Can the BQ29703DSER replace the AP9101CAK-BSTRG1 directly?
A: The BQ29703DSER provides equivalent single-cell lithium ion/polymer battery protection with additional short-circuit and under-voltage detection. However, the 6-WSON package differs from the SOT-25 package, requiring PCB redesign and new footprint implementation. Electrical compatibility is confirmed, but physical substitution requires design modification.
Q: Are all listed parts ROHS3 compliant?
A: Yes, all parts listed meet ROHS3 compliance requirements and maintain Moisture Sensitivity Level 1 (Unlimited), ensuring compatibility with standard manufacturing and storage conditions.
Q: Which substitute part offers the highest inventory availability?
A: The BQ29703DSER from Texas Instruments offers the highest inventory with 18025 units in stock, followed by AP9101CK-AHTRG1 with 14500 units.
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