BD910 - Silicon Epitaxial-Base NPN Power Transistor

Overview

The BD910 is a silicon epitaxial-base NPN power transistor designed for high-power amplification and switching applications. Housed in a Jedec TO-220 plastic package, this component is optimized for robust performance in demanding environments. With its high current and voltage ratings, the BD910 is suitable for use in power supplies, motor control, and audio amplification circuits. Its construction ensures efficient thermal dissipation, making it reliable for continuous operation under high-load conditions.

Key Features

• High Current Capability: Supports collector currents up to 4A, making it ideal for power applications.
• High Voltage Tolerance: Collector-Emitter voltage (V_CEO) rating of 100V ensures reliable operation in high-voltage circuits.
• Low Saturation Voltage: Minimizes power loss during switching operations, improving efficiency.
• Excellent Thermal Stability: TO-220 package facilitates effective heat dissipation, enhancing long-term reliability.
• Complementary PNP Option: Available as part of a complementary pair with the BD911 (PNP equivalent) for push-pull configurations.
• Wide Operating Temperature Range: Suitable for industrial and automotive applications with temperatures ranging from -65°C to +150°C.

Applications

The BD910 is versatile and finds use in a variety of high-power electronic circuits, including:

• Power Supplies: Used in linear and switching regulators due to its high current and voltage handling.
• Motor Control: Ideal for driving DC motors and solenoids in industrial automation and automotive systems.
• Audio Amplification: Suitable for output stages in high-fidelity audio amplifiers.
• Switching Circuits: Efficiently manages load switching in relay drivers and inductive load controllers.
• Inverters and Converters: Used in DC-AC and DC-DC power conversion systems.

Electrical Characteristics

The following tables outline the key electrical parameters of the BD910 under specified test conditions.

Absolute Maximum Ratings

• Collector-Emitter Voltage (V_CEO): 100V
• Collector-Base Voltage (V_CBO): 120V
• Emitter-Base Voltage (V_EBO): 5V
• Collector Current (I_C): 4A (continuous)
• Total Power Dissipation (P_tot): 40W (at 25°C case temperature)
• Operating Junction Temperature (T_j): -65°C to +150°C

Thermal Characteristics

• Thermal Resistance, Junction-to-Case (R_thJC): 3.125°C/W
• Thermal Resistance, Junction-to-Ambient (R_thJA): 62.5°C/W

On-State Characteristics

• DC Current Gain (h_FE): 40 to 250 (at I_C = 500mA, V_CE = 2V)
• Collector-Emitter Saturation Voltage (V_CE(sat)): 0.5V (max) at I_C = 2A, I_B = 0.2A
• Base-Emitter Saturation Voltage (V_BE(sat)): 1.2V (max) at I_C = 2A, I_B = 0.2A

Switching Characteristics

• Turn-On Time (t_on): 500ns (typical)
• Turn-Off Time (t_off): 1.5μs (typical)
• Fall Time (t_f): 500ns (typical)

Package Information

The BD910 is housed in a TO-220 plastic package, which is widely used for power transistors due to its excellent thermal and mechanical properties.

TO-220 Package Dimensions

• Total Height: 10.0mm (max)
• Lead Length: 14.0mm (min)
• Lead Spacing: 2.54mm (between centers)
• Mounting Hole Diameter: 3.5mm (recommended)

Mechanical Specifications

• Weight: Approximately 2.0 grams
• Material: Molded plastic (UL 94V-0 flammability rating)
• Lead Material: Copper alloy, tin-plated

Recommended PCB Layout

For optimal thermal and electrical performance, follow these guidelines when designing the PCB layout:

• Ensure adequate copper area around the mounting tab to dissipate heat.
• Use a heatsink if the power dissipation exceeds 10W.
• Minimize trace lengths between the transistor and associated components to reduce parasitic inductance.

Reliability and Compliance

The BD910 complies with industry standards for reliability and environmental safety:

• RoHS Compliance: Meets Restriction of Hazardous Substances directives.
• ESD Protection: Robust against electrostatic discharge (tested per JESD22-A114).
• Moisture Sensitivity Level (MSL): MSL 1 (unlimited floor life at ≤30°C/85% RH).

Conclusion

The BD910 is a high-performance NPN power transistor that excels in applications requiring high current and voltage handling. Its TO-220 package ensures efficient thermal management, while its electrical characteristics make it suitable for a broad range of power amplification and switching tasks. Whether used in power supplies, motor control, or audio systems, the BD910 delivers reliable and efficient performance under demanding conditions.