My Inquiry
My Account
Alpha & Omega Semiconductor Inc. AOB288L
- Part No.:
- AOB288L
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- FETs, MOSFETs
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
AOB288L.pdf
- Description:
- MOSFET N-CH 80V 10.5A/46A TO263
- Quantity:
- Payment:
- Shipping:
Inventory:5,521
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AOB288L from Alpha & Omega Semiconductor is an 80V N-channel Trench MOSFET in TO-263 (D2PAK) package, rated for 46A continuous drain current at TC=25°C, with RDS(ON) < 9.2 mΩ at VGS=10V and < 12.5 mΩ at VGS=6V. It features 100% UIS and Rg testing, and is optimized for high-frequency switching in boost converters and synchronous rectifiers.
For engineers reviewing the AOB288L datasheet, pinout, applications, or equivalent options, key selection criteria include its 80V VDS rating, low gate charge (Qg = 26.5–38 nC), avalanche energy rating (EAS = 160 mJ), thermal resistance (RθJC = 1.6 °C/W), and TO-263 surface-mount compatibility for high-power density designs.
Technical Context
The AOB288L employs trench-gate MOSFET technology to minimize both conduction loss (via ultra-low RDS(ON)) and switching loss (via low Ciss = 1871 pF, Crss = 14 pF, and Qgd = 4 nC). Its gate threshold voltage (2.3–3.4 V) ensures robust turn-on control under varying drive conditions.
Thermally, it supports junction temperatures up to 175°C with a low RθJC of 1.6 °C/W and is characterized for stable operation across TC = 25–100°C, enabling reliable use in thermally constrained industrial and telecom power stages without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 80 V - Maximum blocking voltage for primary-side switching in 48V-input DC-DC converters and LED backlighting supplies. |
| ID (TC=25°C) | 46 A - Continuous current capability at heatsink temperature of 25°C, supporting >200W power stages with minimal parallel devices. |
| RDS(ON) @ VGS=10V | < 9.2 mΩ - Enables <0.43 W conduction loss at 20A, critical for efficiency in high-current synchronous rectification. |
| Qg (10V) | 26.5–38 nC - Low total gate charge reduces driver power demand and enables efficient 300–500 kHz switching in boost PFC circuits. |
| RθJC | 1.6 °C/W - Allows direct mounting to PCB copper or external heatsink for thermal management without thermal interface material in many applications. |
| EAS | 160 mJ - Rated unclamped inductive switching energy supports robustness against transient overloads in flyback and LLC resonant converters. |
Pinout & Package
AOB288L is housed in a surface-mount TO-263 (D2PAK) package with three terminals: Drain (D), Source (S), and Gate (G). The exposed drain pad on the bottom provides low-inductance, high-current path and enhanced thermal conduction to PCB copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D (Drain) | Main high-side current path | Connected to input bus or transformer secondary; electrically and thermally tied to large copper pour for heat spreading and EMI reduction. |
| S (Source) | Reference node for gate drive and current sensing | Provides return path for load current and serves as local ground reference for gate driver ICs; routed with low-inductance layout. |
| G (Gate) | Control terminal for channel conduction | Driven by isolated or bootstrap gate driver; requires series resistor (Rg = 0.6–2 Ω typical) to damp ringing and control dV/dt. |
Key Features
| Feature | Design Value |
|---|---|
| 100% UIS tested | Guarantees minimum 160 mJ single-pulse avalanche energy, eliminating need for external snubbers in inductive switching applications. |
| Trench MOSFET architecture | Delivers best-in-class RDS(ON) × Qg figure-of-merit (FoM ≈ 240 Ω·nC), reducing combined conduction and switching losses in high-frequency SMPS. |
| Low Crss (14 pF) | Minimizes Miller-induced shoot-through risk and improves controllability during hard-switching transitions in half-bridge topologies. |
| Body diode tRR = 32 ns | Enables efficient synchronous rectification in DC-DC converters without requiring external Schottky catch diodes in most cases. |
Applications
| Server PSU Boost Converter | Industrial 48V DC-DC Converter |
|---|---|
Use Scenario: High-efficiency, 300–500 kHz boost PFC stage in 1U server power supplies handling 800–1200W output. IC Role / Device Role / Timing Role: Main switching FET in interleaved boost topology, operating with fast gate drive and tight thermal constraints. Use Value: Low RDS(ON) and Qg reduce conduction and switching losses, while 80V rating accommodates 48V nominal input with 20% transient margin. |
Use Scenario: Primary-side switch in isolated 48V-to-12V/24V DC-DC converters for factory automation controllers and PLC I/O modules. IC Role / Device Role / Timing Role: High-side switch in active-clamp forward or asymmetrical half-bridge configuration. Use Value: 100% UIS rating ensures reliability under short-circuit and overload events common in industrial environments. |
| LED Backlight Driver | Telecom Rectifier Module |
Use Scenario: Synchronous rectifier in high-brightness LCD TV backlight inverters delivering 100–200W to CCFL or LED strings. IC Role / Device Role / Timing Role: Secondary-side switch replacing Schottky diodes to improve efficiency above 90% at full load. Use Value: Fast body diode recovery (tRR = 32 ns) and low VSD (0.71 V typ.) minimize reverse recovery loss and conduction drop. |
Use Scenario: Output rectification in 48V telecom rectifier modules compliant with NEBS Level 3 and ETSI standards. IC Role / Device Role / Timing Role: High-current, high-reliability output switch in redundant parallel rectifier banks. Use Value: TO-263 package enables automated assembly and high thermal reliability; 175°C max TJ supports extended life at elevated ambient temperatures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar N-channel power MOSFET applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STP80NF55-08 | 80V, 80A, TO-220, RDS(ON) = 8.5 mΩ @ 10V, Qg = 120 nC - higher gate charge and larger package. | Requires larger heatsink and slower switching; suited for lower-frequency (<100 kHz), higher-current linear replacement. | Choose STP80NF55-08 only when board space allows TO-220 and switching frequency is below 150 kHz. |
| IXTP80N10T | 100V, 80A, TO-220, RDS(ON) = 10.5 mΩ @ 10V, Qg = 72 nC - higher voltage rating but higher RDS(ON) and Qg than AOB288L. | Better for 60–100V bus systems; less optimal for 48V systems where AOB288L's lower Qg and RDS(ON) yield superior efficiency. | Select IXTP80N10T only if system requires 100V VDS margin; otherwise AOB288L delivers better FoM in 48V applications. |
Compared with STP80NF55-08 and IXTP80N10T, the AOB288L offers superior high-frequency efficiency due to its lower Qg and RDS(ON) × Qg FoM, tighter thermal resistance (1.6 °C/W vs. >2.5 °C/W), and surface-mount TO-263 footprint enabling denser, automated power designs.
Availability
AOB288L is available at Aetrix Electronics and suitable for server power supplies, industrial DC-DC converters, and LED backlight drivers requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for AOB288L 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, industrial, and telecom markets.
The AOB288L belongs to AOS's Trench Power MOSFET product line, engineered specifically for high-efficiency, high-frequency switching power conversion in space-constrained, thermally demanding applications.
FAQ
What is the maximum junction temperature rating for the AOB288L?
The AOB288L has a maximum junction temperature (TJ) rating of 175°C, validated per Absolute Maximum Ratings table. This allows operation in high-ambient environments such as enclosed telecom rectifiers or industrial motor drives when paired with appropriate PCB copper area or heatsinking. The device's RθJC of 1.6 °C/W enables predictable thermal design up to this limit.
Is the AOB288L suitable for synchronous rectification in DC-DC converters?
Yes, the AOB288L is well-suited for synchronous rectification due to its low RDS(ON) (<9.2 mΩ), fast body diode recovery time (tRR = 32 ns), and low forward voltage (VSD = 0.71 V typ.). These characteristics reduce conduction and reverse recovery losses compared to Schottky diodes, especially in 48V-output buck or flyback converters operating above 200 kHz.
Does the AOB288L have 100% avalanche testing, and what does that mean for reliability?
Yes, the AOB288L undergoes 100% Unclamped Inductive Switching (UIS) testing per datasheet Note C, guaranteeing a minimum single-pulse avalanche energy (EAS) of 160 mJ. This ensures robustness against inductive transients-such as those caused by transformer leakage or load dump-without requiring external protection circuitry in properly designed power stages.
What gate drive voltage range is recommended for reliable operation of the AOB288L?
The AOB288L specifies a gate threshold voltage (VGS(th)) of 2.3–3.4 V and is fully enhanced at VGS ≥ 10 V. For robust noise immunity and minimal RDS(ON), a gate drive of 10–12 V is recommended. Operation at VGS = 6 V yields RDS(ON) < 12.5 mΩ and remains viable for space-constrained or low-voltage gate driver designs, though with ~35% higher conduction loss than at 10 V.
How does the TO-263 package of the AOB288L compare thermally to TO-220 alternatives?
The AOB288L's TO-263 (D2PAK) package delivers RθJC = 1.6 °C/W-significantly lower than typical TO-220 packages (≥2.5 °C/W)-due to its large exposed drain pad and optimized internal construction. This enables higher power dissipation in surface-mount layouts and eliminates mechanical mounting hardware, improving thermal consistency and manufacturability in automated assembly lines.
AOB288L Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Series:
- -
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- FET Type:
- N-Channel
- Technology:
- MOSFET (Metal Oxide)
- Drain to Source Voltage (Vdss):
- 80 V
- Current - Continuous Drain (Id) @ 25°C:
- 10.5A (Ta), 46A (Tc)
- Drive Voltage (Max Rds On, Min Rds On):
- 6V, 10V
- Rds On (Max) @ Id, Vgs:
- 8.9mOhm @ 20A, 10V
- Vgs(th) (Max) @ Id:
- 3.4V @ 250µA
- Gate Charge (Qg) (Max) @ Vgs:
- 38 nC @ 10 V
- Vgs (Max):
- ±20V
- Input Capacitance (Ciss) (Max) @ Vds:
- 1871 pF @ 40 V
- FET Feature:
- -
- Power Dissipation (Max):
- 2.1W (Ta), 93.5W (Tc)
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263 (D2PAK)
AOB288L FAQ
1.How can I place an order for AOB288L through Aetrix?
Please submit a Request for Quotation (RFQ) for AOB288L on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AOB288L reliable?
The price and inventory of AOB288L are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOB288L is usually 5 days.
3.What payment methods are accepted for AOB288L?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOB288L transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOB288L?
AOB288L orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOB288L order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AOB288L?
For technical support, including AOB288L datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOB288L requirements.
6.How does Aetrix verify that AOB288L is sourced from the original manufacturer or authorized distributors?
All AOB288L products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AOB288L meets industry standards.
7.What is the process for return or replacement of AOB288L?
All AOB288L units undergo pre-shipment inspection (PSI). If there is an issue with AOB288L, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AOB288L part is unused and in its original packaging.
Return procedure for AOB288L:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AOB288L Tags
-
BSZ180P03NS3EGATMA1
Infineon Technologies
-
SIRA14DP-T1-GE3
Vishay Siliconix
-
AO4419
Alpha & Omega Semiconductor Inc.
-
SISA14BDN-T1-GE3
Vishay Siliconix
-
PSMN9R5-30YLC,115
Nexperia USA Inc.
-
BUK9Y21-40E,115
Nexperia USA Inc.
-
RTQ035N03HZGTR
Rohm Semiconductor
-
FDMS7680
onsemi
-
RQ3E180BNTB
Rohm Semiconductor
-
STL6N2VH5
STMicroelectronics
-
DMPH4029LFGQ-7
Diodes Incorporated
-
DMT6015LSS-13
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
