Alpha & Omega Semiconductor Inc. AOTF380A60L

Overview

AOTF380A60L from Alpha & Omega Semiconductor is a 600 V, 44 A N-channel MOSFET in TO-220F Green package, featuring R_DS(ON) ≤ 0.38 Ω at V_GS = 10 V, Q_g = 18 nC, and 100% UIS-tested ruggedness-designed for high-efficiency SMPS with PFC, LLC, and flyback topologies in server power and lighting systems.

For engineers reviewing the AOTF380A60L datasheet, pinout, applications, or equivalent options, key selection criteria include its 700 V BVDSS rating at TJ,max, 0.95 °C/W R_θJC, 251 ns t_rr, 100% R_g tested gate resistance, and optimized EMI performance via aMOS5™ technology.

Technical Context

The AOTF380A60L employs proprietary aMOS5™ trench-gate process to achieve low conduction loss (R_DS(ON) ≤ 0.38 Ω) and fast switching (t_on = 33 ns, t_off = 59 ns), with enhanced body diode robustness enabling reliable operation in hard-switched and resonant converters.

Its thermal design supports high-power density applications: R_θJC = 0.95 °C/W enables efficient heatsink coupling, while normalized transient thermal impedance curves (Figure 13) confirm stable junction temperature under pulsed loads up to 10 ms at D = 0.5.

Key Specifications

Pinout & Package

Package: TO-220F Green (full-pack, isolated tab, surface-mount compatible with through-hole footprint).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar N-channel power MOSFET applications.

Compared with STP60N60DM6 and IPP60R041C7, the AOTF380A60L delivers optimal balance of low R_DS(ON), moderate Q_g, proven UIS ruggedness, and fast body diode recovery-making it preferred for space-constrained, high-reliability SMPS where both efficiency and robustness are critical.

Availability

AOTF380A60L is available at Aetrix Electronics and suitable for server power supplies, LED drivers, and flyback adapters requiring stable component supply, consistent parametric performance across production lots, and long-term industrial lifecycle support.

Supply support for AOTF380A60L includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Alpha & Omega Semiconductor (AOS) is a fabless power semiconductor company specializing in high-performance MOSFETs, IGBTs, and power ICs for computing, consumer, and industrial markets.

The AOTF380A60L belongs to AOS's aMOS5™ high-voltage MOSFET product line, engineered specifically for high-efficiency, high-reliability switched-mode power supplies operating at 60–300 kHz with stringent EMI and ruggedness requirements.

FAQ

What is the maximum junction temperature rating for the AOTF380A60L?

The AOTF380A60L has a maximum junction temperature (T_J) rating of 150 °C, validated across all absolute maximum ratings and thermal characterization curves-including Figure 13's transient thermal impedance plot. This rating is used to define its Safe Operating Area (SOA), power derating above 25 °C, and UIS test conditions. The AOTF380A60L must be thermally managed to ensure T_J does not exceed this limit during steady-state or pulsed operation.

Does the AOTF380A60L have an isolated package, and how does that affect heatsinking?

Yes, the AOTF380A60L uses a TO-220F Green package with electrically isolated metal tab, eliminating the need for insulating pads or washers when mounted to grounded heatsinks. Its R_θJC is 0.95 °C/W, measured from junction to case (tab), enabling direct thermal coupling while maintaining electrical isolation. This design simplifies thermal layout and improves reliability in high-voltage primary-side applications compared to standard TO-220.

Is the AOTF380A60L suitable for zero-voltage switching (ZVS) topologies like LLC resonant converters?

Yes, the AOTF380A60L is well-suited for ZVS LLC converters due to its low E_oss (2.6 mJ at 400 V), fast t_rr (251 ns), and controlled Crss (2.4 pF), which collectively reduce turn-on loss and enable reliable soft-switching down to ~100 kHz. Its 100% UIS testing further validates robustness during transient ZVS boundary crossings where hard switching may occur.

What is the gate threshold voltage range for the AOTF380A60L, and how does it impact drive circuit design?

The AOTF380A60L has a gate threshold voltage (V_GS(th)) range of 2.6 V to 3.8 V at T_J = 25 °C, with typical value 3.2 V. This relatively tight distribution ensures predictable turn-on behavior across temperature and lot variations. Drive circuits must supply ≥10 V to fully enhance the device (R_DS(ON) spec assumes V_GS = 10 V), and gate resistors should be selected to control dv/dt while respecting the 4.8 Ω internal R_g verified in 100% testing.

How is the AOTF380A60L different from the AOT380A60L and AOB380A60L variants?

The AOTF380A60L differs from AOT380A60L (TO-220 Green) and AOB380A60L (TO-263/D2PAK) primarily in package construction: AOTF380A60L uses TO-220F with electrically isolated tab, whereas AOT380A60L has conductive tab and AOB380A60L is surface-mount. Thermal resistance differs-R_θJC is 0.95 °C/W (AOTF), 4.6 °C/W (AOT), and 0.5 °C/W (AOB)-and each variant has distinct SOA curves and mounting requirements. All share identical silicon die and electrical specs.