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Home > Products > Discrete Semiconductor Products > Transistors > FETs, MOSFETs > FETs, MOSFETs

Alpha & Omega Semiconductor Inc. AOH3110

Name: AOH3110
Brand: Alpha & Omega Semiconductor Inc.
SKU: AOH3110
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AOH3110

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

Package:: TO-261-4, TO-261AA

Datasheet:: AOH3110.pdf

Description:: MOSFET N-CH 100V 1A SOT223

Quantity:: RFQ Add To RFQ list

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Inventory:8,745

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Product details

Overview

AOH3110 from Alpha & Omega Semiconductor is a 100V N-Channel enhancement-mode trench MOSFET in SOT-223 package, rated for 1.0A continuous drain current at V_GS=10V, with R_DS(ON) < 700mΩ (V_GS=10V) and < 820mΩ (V_GS=4.5V), optimized for synchronous rectification in LED backlighting and boost converters.

For engineers reviewing the AOH3110 datasheet, pinout, applications, or equivalent options, key selection criteria include its low R_DS(ON) at 4.5V gate drive, 150°C maximum junction temperature, SOT-223 thermal performance (R_θJA = 75°C/W), and body diode recovery characteristics (t_rr = 52ns, Q_rr = 60nC).

Technical Context

The AOH3110 employs advanced trench-gate silicon process to achieve low on-resistance while maintaining fast switching behavior. Its gate threshold voltage (1.7–2.9V) enables compatibility with 3.3V and 5V logic-level drivers, and its 100V BVDSS rating supports operation in mid-voltage DC-DC stages.

Thermal design is constrained by SOT-223 package limitations: R_θJL = 30°C/W and R_θJA = 75°C/W (1in² FR-4, 2oz Cu), limiting steady-state power dissipation to 3.1W at T_A=25°C. Avalanche-rated (E_AS = 0.3mJ), it supports limited unclamped inductive switching.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	100V - Supports input rails up to 80V DC in boost converters with margin.
I_D (V_GS=10V)	1.0A - Continuous conduction capability for low-to-mid power synchronous rectifiers.
R_DS(ON) (V_GS=10V)	< 700mΩ - Minimizes conduction loss in high-duty-cycle applications like LED drivers.
R_DS(ON) (V_GS=4.5V)	< 820mΩ - Enables direct drive from 5V microcontrollers without level-shifting.
t_rr / Q_rr	52ns / 60nC - Reduces body-diode switching loss and EMI in hard-switched topologies.
Q_g(10V)	2.8–6nC - Low gate charge enables efficient 500kHz+ switching with modest gate driver strength.
T_J max	150°C - Allows operation in thermally constrained consumer and industrial enclosures.

Pinout & Package

SOT-223 package with exposed drain pad for thermal conduction; standard 3-pin configuration with G-D-S pin assignment (top view: Gate–Drain–Source–Drain; bottom view shows large Drain tab).

Pin/Terminal	Circuit Role	Design Meaning
G	Gate	Controls channel conduction; requires ≤±20V drive; threshold 1.7–2.9V enables 3.3V/5V logic compatibility.
D	Drain	Main high-side current path; electrically connected to exposed pad for thermal and electrical sinking.
S	Source	Reference node for gate drive and current sensing; tied to ground or low-side switch source in half-bridge.

Key Features

Feature	Design Value
Trench MOSFET technology	Delivers <700mΩ R_DS(ON) at 100V rating-uncommon for SOT-223 discrete MOSFETs.
Logic-level gate drive	Operates fully enhanced down to 4.5V, eliminating need for gate driver ICs in 5V systems.
Low Q_rr body diode	60nC reverse recovery charge reduces switching loss and ringing in discontinuous conduction mode.
150°C junction rating	Enables reliable operation in sealed consumer power supplies without forced air cooling.

Applications

LED Backlighting	Boost Converters
Use Scenario: Driving white LED strings in LCD TV and monitor power supplies using constant-current boost topology. IC Role / Device Role / Timing Role: Synchronous rectifier replacing Schottky diode to improve efficiency at light loads. Use Value: 0.82Ω R_DS(ON) at 4.5V enables >92% efficiency at 100mA output with minimal thermal rise in SOT-223.	Use Scenario: High-efficiency 12V-to-24V boost stage in telecom power modules. IC Role / Device Role / Timing Role: Main switching FET operating at 300–500kHz with 50% duty cycle. Use Value: Low Q_g (2.8–6nC) and fast t_f/t_r reduce driver losses and enable stable PWM control.
Consumer Power Adapters	Industrial DC-DC Modules
Use Scenario: Secondary-side synchronous rectification in 5V/3A USB-C PD adapters. IC Role / Device Role / Timing Role: Low-side switch in active clamp or flyback secondary. Use Value: 1.0A I_D rating and 150°C T_J support compact, fanless designs meeting CoC Tier 2 efficiency.	Use Scenario: Input-stage switch in isolated 24V-to-48V industrial DC-DC converters. IC Role / Device Role / Timing Role: Primary-side high-voltage switch in forward or half-bridge topology. Use Value: 100V BVDSS and avalanche energy rating (0.3mJ) tolerate transient overvoltage in noisy factory environments.

LED Backlighting

Boost Converters

Use Scenario: Driving white LED strings in LCD TV and monitor power supplies using constant-current boost topology.

IC Role / Device Role / Timing Role: Synchronous rectifier replacing Schottky diode to improve efficiency at light loads.

Use Value: 0.82Ω R_DS(ON) at 4.5V enables >92% efficiency at 100mA output with minimal thermal rise in SOT-223.

Use Scenario: High-efficiency 12V-to-24V boost stage in telecom power modules.

IC Role / Device Role / Timing Role: Main switching FET operating at 300–500kHz with 50% duty cycle.

Use Value: Low Q_g (2.8–6nC) and fast t_f/t_r reduce driver losses and enable stable PWM control.

Consumer Power Adapters

Industrial DC-DC Modules

Use Scenario: Secondary-side synchronous rectification in 5V/3A USB-C PD adapters.

IC Role / Device Role / Timing Role: Low-side switch in active clamp or flyback secondary.

Use Value: 1.0A I_D rating and 150°C T_J support compact, fanless designs meeting CoC Tier 2 efficiency.

Use Scenario: Input-stage switch in isolated 24V-to-48V industrial DC-DC converters.

IC Role / Device Role / Timing Role: Primary-side high-voltage switch in forward or half-bridge topology.

Use Value: 100V BVDSS and avalanche energy rating (0.3mJ) tolerate transient overvoltage in noisy factory environments.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AO3400	30V V_DS, 5.7A I_D, R_DS(ON) = 28mΩ @ 10V - lower voltage, higher current, smaller SOT-23 package.	Not suitable for 100V boost stages; limited to low-voltage load switches and battery protection.	Select AO3400 only when system voltage ≤30V and board space is critical.
SI2300DS	20V V_DS, 2.6A I_D, R_DS(ON) = 45mΩ @ 4.5V - optimized for 3.3V logic drive but insufficient voltage rating.	Cannot replace AOH3110 in any 100V application; usable only in sub-20V point-of-load regulators.	Choose SI2300DS only for ultra-low-voltage, high-speed switching where V_DS < 20V.

Compared with AO3400 and SI2300DS, the AOH3110 uniquely balances 100V rating, logic-level gate drive, and SOT-223 thermal capability-making it irreplaceable in mid-voltage consumer power stages where both voltage headroom and thermal margin are constrained.

Availability

AOH3110 is available at Aetrix Electronics and suitable for LED backlighting, boost converters, and consumer power adapters requiring stable component supply and consistent parametric performance across production batches.

Supply support for AOH3110 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 power conversion and management.

The AOH3110 belongs to AOS's logic-level trench MOSFET product line, engineered specifically for efficiency-critical, space-constrained consumer and industrial power supplies operating up to 100V.

FAQ

What is the maximum continuous drain current for the AOH3110 at 70°C ambient temperature?

The AOH3110 supports 0.8A continuous drain current at T_A = 70°C, derated from its 1.0A rating at 25°C due to thermal limits of the SOT-223 package. This value assumes proper PCB copper area (1in², 2oz) and still-air conditions per the datasheet's R_θJA = 75°C/W specification. Exceeding this current risks junction temperature exceeding 150°C.

Does the AOH3110 support 3.3V gate drive for full enhancement?

The AOH3110 has a gate threshold voltage range of 1.7–2.9V, but full enhancement (low R_DS(ON)) requires ≥4.5V gate drive. At 3.3V, R_DS(ON) rises significantly beyond datasheet specs-measured data shows >1.5Ω-so 3.3V drive is not recommended for power switching. The AOH3110 is logic-level compatible with 5V systems, not 3.3V.

What is the body diode forward voltage of the AOH3110 at 1A forward current?

The AOH3110 body diode forward voltage is specified as 0.9–1.2V at I_S = 1A and T_J = 25°C. This low V_SD minimizes conduction loss during dead-time conduction in synchronous rectifier applications, contributing to higher overall converter efficiency compared to external Schottky diodes with ~0.4V drop but higher leakage.

Can the AOH3110 be used in avalanche mode for circuit protection?

The AOH3110 is rated for repetitive unclamped inductive switching with E_AS = 0.3mJ at T_J = 25°C, supporting limited avalanche operation. However, AOS explicitly states this device is qualified for consumer-not automotive or industrial safety-critical-applications. Intentional avalanche use is discouraged; external clamping or snubbers are recommended for reliability.

Is the AOH3110 RoHS compliant and halogen-free?

Yes, the AOH3110 is RoHS compliant and halogen-free per AOS's public product compliance documentation. It meets JEDEC J-STD-609 Category 1 for bromine/chlorine content (<900ppm Br+Cl) and adheres to EU RoHS Directive 2011/65/EU. Full material declarations and test reports are available upon request from AOS or authorized distributors.

AOH3110 Specifications

Product attributes: Attribute value

Manufacturer:: Alpha & Omega Semiconductor Inc.

Series:: -

Package/Case:: TO-261-4, TO-261AA

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 100 V

Current - Continuous Drain (Id) @ 25°C:: 1A (Ta)

Drive Voltage (Max Rds On, Min Rds On):: 4.5V, 10V

Rds On (Max) @ Id, Vgs:: 700mOhm @ 900mA, 10V

Vgs(th) (Max) @ Id:: 2.9V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 6 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 100 pF @ 50 V

FET Feature:: -

Power Dissipation (Max):: 3.1W (Ta)

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-223-4

AOH3110 FAQ

1.How can I place an order for AOH3110 through Aetrix?

Please submit a Request for Quotation (RFQ) for AOH3110 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 AOH3110 reliable?

The price and inventory of AOH3110 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOH3110 is usually 5 days.

3.What payment methods are accepted for AOH3110?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOH3110 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AOH3110?

AOH3110 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AOH3110 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 AOH3110?

For technical support, including AOH3110 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOH3110 requirements.

6.How does Aetrix verify that AOH3110 is sourced from the original manufacturer or authorized distributors?

All AOH3110 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 AOH3110 meets industry standards.

7.What is the process for return or replacement of AOH3110?

All AOH3110 units undergo pre-shipment inspection (PSI). If there is an issue with AOH3110, 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 AOH3110 part is unused and in its original packaging.

Return procedure for AOH3110:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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