FS8205A 20V 6A Dual N-Channel Power MOSFET SOT-23-6

FS8205A 20V 6A Dual N-Channel Power MOSFET SOT-23-6 is a high-density, dual N-channel enhancement mode power MOSFET designed to deliver exceptional efficiency in compact power management circuits. This component utilizes advanced trench technology to achieve ultra-low on-resistance, which significantly minimizes power loss during high-current switching operations. Consequently, the FS8205A remains a top choice for battery protection modules where space-saving and thermal performance are critical. Integrated within a single SOT-23-6 package, these two independent MOSFETs allow for flexible circuit configurations. Therefore, you can efficiently implement bi-directional switching or synchronous rectification in portable electronic devices. Furthermore, its low gate charge requirements enable high-speed switching, providing a reliable and responsive solution for modern power conversion tasks.

Key Features:

• Dual Configuration: Houses two independent N-channel MOSFETs in a single miniature package, facilitating complex switching designs in limited PCB areas.
• Ultra-Low On-Resistance: Features a typical R_DS(ON) of only 25 mΩ at 4.5V, which drastically reduces heat generation during operation.
• High Current Capability: Supports a continuous drain current of up to 6A, allowing the device to handle significant power loads for its size.
• Low Gate Charge: Minimizes the energy required for switching transitions, leading to improved overall system efficiency and faster response times.
• Excellent Thermal Stability: Maintains consistent performance across a wide range of temperatures, ensuring long-term reliability in consumer electronics.

Technical Specifications:

• Drain-Source Voltage (V_DSS): 20 V
• Continuous Drain Current (I_D): 6 A
• Gate-Source Voltage (V_GSS): ±12 V
• Static Drain-Source On-Resistance (R_DS(ON)): ≈ 25 mΩ @ V_GS = 4.5V
• Pulsed Drain Current (I_DM): 25 A
• Maximum Power Dissipation (P_D): 1.5 W
• Operating Junction Temperature Range: −55°C to +150°C

Mechanical Specifications:

• Package Type: SOT-23-6 (Small Outline Transistor)
• Lead Finish: Lead-free (RoHS Compliant)
• Encapsulation: Molded Plastic Case (UL 94V-0 Rated)
• Mounting Style: Surface Mount Device (SMD/SMT)

Dimensions:

• Body Length: ≈ 2.9 mm
• Body Width: ≈ 1.6 mm
• Total Height: ≈ 1.1 mm (max)
• Pin Pitch: 0.95 mm
• Lead Span: ≈ 2.8 mm

Pinout and Wiring:

• Pin 1 (D1/D2): Common Drain for both MOSFETs (Internal connection varies by manufacturer; verify with datasheet).
• Pin 2 (S1): Source of the first N-channel MOSFET.
• Pin 3 (S1): Second terminal for Source 1 to handle higher current.
• Pin 4 (G1): Gate of the first N-channel MOSFET; apply positive voltage to trigger.
• Pin 5 (G2): Gate of the second N-channel MOSFET.
• Pin 6 (S2): Source of the second N-channel MOSFET.
• Wiring Note: However, always check the specific internal schematic of your FS8205A variant, as some versions feature internally connected drains to simplify battery protection layouts.

Datasheet Reference:

• Download Fortune Semiconductor FS8205A Datasheet

Commonly Used in:

• Lithium-Ion Battery Protection: Widely used in BMS boards to prevent overcharge, over-discharge, and short-circuit conditions.
• Load Switches: Integrated into power distribution paths for portable electronics and wearables.
• DC-DC Converters: Serving as high-efficiency power switches in small-scale buck or boost regulators.

Applications:

• Smartphones and Tablets: Managing internal battery charging and safety protocols.
• Power Banks: Controlling the output flow and protecting internal 18650 or Li-Po cells.
• Handheld Tools: Providing high-current switching for cordless electronic appliances.
• LED Drivers: Efficiently toggling power for high-brightness lighting modules.

Equivalent Models:

• DW01-series paired with 8205: Common combination in battery protection; functionally similar setups use the DW01 IC with external FS8205A MOSFETs.
• AO8810: A similar dual N-channel MOSFET featuring comparable voltage and current ratings in a TSSOP-8 or SOT-23-6 footprint.
• MT8205: A direct cross-reference part providing nearly identical electrical characteristics.

Package Includes:

• 1 x FS8205A 20V 6A Dual N-Channel Power MOSFET SOT-23-6