Cantara/.claude/skills/manufacturers/alphaomega

Alpha and Omega Semiconductor (AOS) Handler Skill

Use this skill when working with Alpha and Omega Semiconductor (AOS) components - primarily MOSFETs.

Company Overview

Alpha and Omega Semiconductor (AOSMD) specializes in power semiconductors, particularly MOSFETs. They are known for:

• High-performance power MOSFETs for computing, consumer, industrial, and automotive applications
• Innovative packaging technologies (TOLL, GTPAK, GLPAK)
• Shield Gate Technology (SGT) for low Rds(on)
• Both N-channel and P-channel devices

MPN Structure

AOS part numbers follow this pattern:

AO[Package Prefix][Series Number][Variant Letter]

Package Prefixes

| Prefix | Package Type | Description | |--------|-------------|-------------| | AO3xxx | SOT-23 | Small outline transistor, 3-pin | | AO4xxx | SO-8 | Small outline, 8-pin | | AOD | TO-252 (DPAK) | Decawatt package | | AON | DFN | Dual flat no-lead (various sizes) | | AOI | TO-251 (IPAK) | I-pak package | | AOT | TO-220 | Through-hole power package | | AOB | TO-263 (D2PAK) | Double DPAK | | AOC | SO-8 | Common drain dual MOSFETs | | AOP | PDFN | Power DFN | | AOTL | TOLL | TO-Leadless (30% smaller than D2PAK) | | AOGT | GTPAK | Topside cooling package | | AOGL | GLPAK | Gull-wing TOLL | | AONS | DFN | DFN source-down | | AONR | DFN | DFN source-down | | AONK | DFN3.3x3.3 | Compact DFN source-down |

Variant Letters

• A - Revision or improved version
• L - Low Rds(on) variant

Examples

| MPN | Package | Type | Notes | |-----|---------|------|-------| | AO3401A | SOT-23 | P-channel | 30V, 4A | | AO3400A | SOT-23 | N-channel | 30V, 5.7A | | AO4407A | SO-8 | P-channel | 30V, 12A | | AO4988 | SO-8 | N-channel | 40V, 10A | | AOD4184 | TO-252 | N-channel | 40V, 50A | | AON6758 | DFN 5x6 | N-channel | 30V, 85A | | AOT240L | TO-220 | N-channel | 40V, 79A | | AOGT66909 | GTPAK | N-channel | Topside cooling |

Handler Implementation

File Location

src/main/java/no/cantara/electronic/component/lib/manufacturers/AlphaOmegaHandler.java

Supported Component Types

• MOSFET

Key Methods

matches(String mpn, ComponentType type, PatternRegistry patterns)

Checks if MPN matches AOS MOSFET patterns.

extractPackageCode(String mpn)

Returns package type based on prefix:

• AO3xxx -> SOT-23
• AO4xxx -> SO-8
• AOD -> TO-252
• AON -> DFN
• etc.

extractSeries(String mpn)

Returns base series without variant letters:

• AO3401A -> AO3401
• AOD4184A -> AOD4184

Test Coverage

Test File Location

src/test/java/no/cantara/electronic/component/lib/handlers/AlphaOmegaHandlerTest.java

Test Categories

• SOT-23 Package MOSFETs (AO3xxx)
• SO-8 Package MOSFETs (AO4xxx)
• TO-252/DPAK Package MOSFETs (AOD)
• DFN Package MOSFETs (AON)
• TO-251/IPAK Package MOSFETs (AOI)
• TO-220 Package MOSFETs (AOT)
• TO-263/D2PAK Package MOSFETs (AOB)
• Advanced Packages (AOTL, AOGT, AOGL, AONS, AONR, AONK)
• Common Drain Dual MOSFETs (AOC)
• PDFN Package MOSFETs (AOP)
• Package Code Extraction
• Series Extraction
• Edge Cases
• Manufacturer Detection

Common Tasks

Adding New Package Types

1. Add pattern to initializePatterns()
2. Add explicit check in matches()
3. Add package mapping in extractPackageCode()
4. Add series extraction logic in extractSeries()
5. Add tests for new patterns

Run Tests

mvn test -Dtest=AlphaOmegaHandlerTest

Learnings & Quirks

Package Encoding

• Position 3-4 after "AO" indicates package type for basic series
• Extended prefixes (AOTL, AOGT, etc.) are 4 characters
• Series numbers typically 3-5 digits

N-channel vs P-channel

• Part number doesn't directly encode polarity
• Must reference datasheet or use external lookup
• Even numbers often N-channel, odd numbers often P-channel (not a strict rule)

Variant Letters

• A suffix common for improved versions
• L suffix for low Rds(on) variants
• No suffix for original versions

References

• AOS MOSFET Product Page
• DigiKey Forum: Identifying AOS MOSFETs

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Last Updated: January 2026