Year: 2026

AON7408 Datasheet PDF – 30V, 18A, N-Channel MOSFET

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AON7408 is a 30V N-Channel Power MOSFET utilizing advanced trench technology to achieve very low ON-resistance and low gate charge for high-efficiency switching applications.

Function: 30V, 18A, N-Channel enhancement mode MOSFET

Package: DFN 3×3 EP Type

Manufacturer: Alpha and Omega Semiconductor ( https://www.aosmd.com/)

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AON7408 datasheet pdf

Description

AON7408 uses advanced trench technology and design to provide excellent RDS(ON) with low gate charge. It offers excellent switching performance, high current capability, and low conduction losses, making it ideal for compact power management designs. This MOSFET is commonly used in DC-DC converters, synchronous rectifiers, battery-powered equipment, load switches, and motor control circuits.

Features

  • Advanced trench MOSFET technology
  • Very low ON-resistance
  • RDS(ON) ≤20mΩ at VGS=10V
  • RDS(ON) ≤32mΩ at VGS=4.5V
  • Low gate charge for fast switching
  • High continuous drain current capability
  • RoHS and Halogen-Free compliant
  • Suitable for high-efficiency power conversion

Pinout

AON7408 pinout

Absolute Maximum Ratings (Tc = 25 °C)

Parameter Symbol Value Unit
Drain-to-Source Voltage VDS 30 V
Gate-to-Source Voltage VGS ±20 V
Continuous Drain Current (Tc = 25°C) ID 18 A
Continuous Drain Current (Tc = 100°C) ID 11.5 A
Pulsed Drain Current IDM 64 A
Power Dissipation (Tc = 25°C) PD 11 W
Power Dissipation (Ta = 25°C) PD 4.5 W
Power Dissipation (Ta = 70°C) PD 3.1 W
Junction and Storage Temperature TJ, TSTG -55 to +150 °C

How to Choose This Part

  • Select the AON7408 for low-voltage applications requiring up to 30V drain-to-source capability
  • Choose this device when low conduction loss and fast switching are critical
  • Suitable for systems using either 10V or 4.5V gate drive voltages
  • Ideal for compact, high-efficiency switching power supplies
  • Ensure sufficient PCB thermal design for continuous high-current operation

Applications

  • DC-DC converters
  • Synchronous rectifiers
  • Battery management systems
  • Load switching circuits
  • Motor control systems
  • Power distribution circuits
  • Consumer electronics
  • Industrial power equipment

Alternative / Equivalent Products

  • AO4407A
  • AOD408
  • IRLR7843
  • FDB8447L
  • Si7465DP

AON7408 Datasheet PDF Download

AON7408 datasheet
AON7408 pdf

SD4938 Datasheet – 150V Current mode PWM Controller

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Part Number: SD4938

Function: Current Mode PWM Controller with 150V MOSFET

Package: SOP-8 Type

Manufacturer: Hangzhou Silan Microelectronics ( www.silan.com.cn )

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SD4938 datasheet pdf

Description

SD4938 is an offline current-mode PWM controller with an integrated 150V power MOSFET designed for switch-mode power supply (SMPS) applications. It incorporates a high-voltage startup circuit, burst mode operation for low standby power, frequency reduction at light loads, and soft-start functionality to improve efficiency and reliability. Comprehensive protection features—including overcurrent, overvoltage, undervoltage, overload, and overtemperature protection with automatic restart—make the SD4938 well suited for compact AC/DC power supplies and industrial power conversion systems.

Features

  • Current-mode PWM controller with integrated 150V power MOSFET
  • Input voltage range: 20V to 150V
  • Integrated high-voltage self-startup circuit
  • Adjustable output voltage options: 12V, 15V, and 18V
  • Maximum output current: 0.5A
  • Burst mode operation for ultra-low standby power consumption
  • Frequency reduction at light load for improved efficiency
  • Soft-start function to reduce startup stress
  • Automatic restart after fault recovery
  • Available in SOP-8 package

Pinout

SD4938 pinout

Typical Circuit Usage

  • Offline flyback power supplies
  • Industrial AC/DC converters
  • PoE auxiliary power supplies
  • Electric bicycle power modules
  • Power supplies for electric tools
  • Balance wheel (self-balancing scooter) controllers
  • Battery charging power supplies
  • Embedded SMPS modules

Absolute Maximum Ratings

Parameter Symbol Rating Unit
High Voltage Input (Drain to Source) VHV,MAX 155 V
Power Supply Voltage (VDD to Source) VDD,MAX 30 V
Power Dissipation PD 0.8 W
Thermal Resistance (Junction to Ambient) θJA 140 °C/W
Thermal Resistance (Junction to Case) θJC 28 °C/W
Operating Junction Temperature TJ 150 °C
Operating Ambient Temperature Tamb −40 to +125 °C
Storage Temperature TSTG −55 to +150 °C

How to Choose This Part

  • Select the SD4938 for compact offline SMPS designs requiring an integrated high-voltage MOSFET.
  • Suitable for power supplies operating from 20V to 150V input.
  • Recommended when low standby power is important due to its burst mode operation.
  • Choose this device for applications requiring comprehensive fault protection with automatic restart.
  • Ideal for flyback converters delivering approximately 12V, 15V, or 18V outputs up to 0.5A.
  • Appropriate for industrial and consumer power conversion products requiring a minimal external component count.

Applications

  • Balance wheel
  • Offline flyback converters
  • Power over Ethernet (PoE) equipment
  • Electric bicycles (E-bike)
  • Self-balancing scooters

 

SD4938 Datasheet PDF Download

SD4938 datasheet
SD4938 pdf