FDS7788: High-Performance N-Channel MOSFET by Fairchild Semiconductor

The FDS7788 is a premium-grade N-channel MOSFET manufactured by Fairchild Semiconductor, a leader in power electronics. Although now classified as obsolete, this MOSFET remains highly valued for its exceptional performance in switching and power management applications. Part of the Transistors - FETs, MOSFETs - Single category, the FDS7788 delivers reliable operation in demanding circuits.

Comprehensive Technical Specifications

1. MOSFET Architecture

• Type: Enhancement Mode N-Channel MOSFET
• Technology: Advanced TrenchFET Process
• Polarity: Single

2. Electrical Characteristics

• Drain-Source Voltage (V_DSS): 30V
• Continuous Drain Current (I_D): 18A @ 25 C
• Pulsed Drain Current (I_DM): 72A
• Power Dissipation (P_D): 2.5W (Ta), 50W (T_J)

3. Conduction Performance

• On-Resistance (R_DS(on)): 4m @ V_GS=10V, I_D=18A
• Gate Threshold Voltage (V_GS(th)): 1-3V

4. Switching Characteristics

• Total Gate Charge (Q_g): 48nC @ V_GS=5V
• Input Capacitance (C_iss): 3845pF @ V_DS=15V
• Turn-On Delay Time (t_d(on)): 12ns typical

Advanced Features

1. Thermal Performance

The FDS7788 features excellent thermal characteristics with:

• Junction-to-Ambient Thermal Resistance (R _JA): 50 C/W
• Operating Junction Temperature: -55 C to +150 C

2. Package Details

• Package Type: 8-SOIC
• Dimensions: 4.9mm 3.9mm 1.25mm
• Mounting: Surface Mount (SMD)
• Lead-Free and RoHS Compliant

Detailed Applications

1. Power Management Systems

• DC-DC Converters
• Voltage Regulation Modules
• Synchronous Rectification

2. Motor Control Applications

• H-Bridge Motor Drivers
• Brushless DC Motor Controllers
• Stepper Motor Drivers

3. Battery Protection Circuits

• Li-ion Battery Packs
• Power Tool Battery Management
• UPS Systems

4. Automotive Electronics

• LED Lighting Drivers
• Power Seat Controllers
• Window Motor Controls

Design Considerations

1. Gate Drive Requirements

For optimal performance:

• Use 10V gate drive for minimum R_DS(on)
• Maximum gate voltage: 20V
• Recommended gate resistor: 2.2 -10

2. PCB Layout Guidelines

• Use thick copper traces for high-current paths
• Implement proper thermal vias for heat dissipation
• Keep gate drive traces short and direct

Why Choose FDS7788?

The FDS7788 stands out for its:

• Industry-leading 4m on-resistance
• High current handling capability
• Compact SOIC-8 package
• Reliable performance across temperature ranges

Obsolete Component Solutions

While the FDS7788 is no longer in production, we maintain stock for legacy system support. For new designs, consider these potential alternatives:

• IRL8743PbF (International Rectifier)
• CSD17313Q2 (Texas Instruments)
• SI7145DP-T1-GE3 (Vishay)

Purchase Information

We offer:

• Genuine Fairchild Semiconductor FDS7788 inventory
• Competitive pricing with volume discounts
• Worldwide shipping options
• Technical support for component selection

For current pricing and availability, please contact our sales team. We're committed to providing solutions for both legacy systems and new designs requiring high-performance MOSFETs.

Note: This product may require minimum order quantities. Please inquire for specific requirements.