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Product Detailed Parameters
- Description：MOSFET N-CH 30V 9A 8SOIC
- Series：-
- Mfr：Alpha & Omega Semiconductor Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- FET Type：N-Channel
- Technology：MOSFET (Metal Oxide)
- Drain to Source Voltage (Vdss)：30 V
- Current - Continuous Drain (Id) @ 25°C：9A (Ta)
- Drive Voltage (Max Rds On, Min Rds On)：4.5V, 10V
- Rds On (Max) @ Id, Vgs：19mOhm @ 9A, 10V
- Vgs(th) (Max) @ Id：2V @ 250µA
- Gate Charge (Qg) (Max) @ Vgs：11 nC @ 10 V
- Vgs (Max)：±25V
- Input Capacitance (Ciss) (Max) @ Vds：560 pF @ 15 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：8-SOIC
- Package / Case：8-SOIC (0.154", 3.90mm Width)
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Overview
The AO4478 is a P-Channel Enhancement Mode Field Effect Transistor manufactured by Alpha & Omega Semiconductor. It utilizes advanced trench technology to achieve low on-resistance and high switching performance. The device features a Drain-Source Voltage (V_DS) of 30V and a continuous Drain Current (I_D) of 12A at 25°C. The typical On-Resistance (R_DS(ON)) is 6.2mΩ at V_GS = -4.5V and 5.5mΩ at V_GS = -10V. It is housed in an SOIC-8 surface-mount package, suitable for low-side switching applications.
Feature Summary
- Advanced trench technology for enhanced performance
- Low on-resistance for efficient power handling
- High body diode recovery characteristics
Applications
- Notebook CPU core power conversion
- Low side switch circuits
- General purpose power management
Procurement Notes
Verify the specific datasheet revision and ordering suffix when sourcing. Confirm that the component meets RoHS and Sony 259 specifications if environmental compliance is required. Ensure the SOIC-8 package dimensions match the target PCB footprint. Cross-reference the manufacturer part number with authorized distributors to ensure authenticity and traceability.
Selection Notes
Select this component for applications requiring a 30V P-channel MOSFET with moderate current handling capabilities. Consider the thermal dissipation limits in the SOIC-8 package when designing the heat sinking strategy. Evaluate the gate charge requirements against the driving circuit's capability to ensure adequate switching speeds.
Part Context
This component belongs to the AO44 series of power MOSFETs from Alpha & Omega Semiconductor. The series is designed for general-purpose switching applications where efficiency and reliability are critical. The AO4478 specifically targets P-channel requirements in compact form factors.
Replacement Considerations
Check for electrically identical alternatives within the same product family. Verify pinout compatibility and package dimensions before substituting. Ensure voltage and current ratings meet or exceed original design specifications.
