MJD47T4 datasheet by STMicroelectronics

MJD47T4 Frequently Asked Questions (FAQs)

• What is the maximum operating temperature range for the MJD47T4?
  The MJD47T4 can operate from -40°C to 150°C (TJ), but the maximum junction temperature (TJ) should not exceed 150°C for reliable operation.
• How do I ensure the MJD47T4 is properly biased for optimal performance?
  To ensure proper biasing, connect the base to the emitter through a resistor (Rb) and the collector to the emitter through another resistor (Rc). The recommended values are Rb = 1 kΩ and Rc = 2.2 kΩ.
• What is the recommended PCB layout for the MJD47T4 to minimize thermal resistance?
  To minimize thermal resistance, use a thermal pad with a minimum size of 2 mm x 2 mm, and ensure the PCB has a thermal via array underneath the pad. Keep the thermal pad away from other components to prevent thermal coupling.
• Can I use the MJD47T4 in a switching application, and if so, what are the limitations?
  Yes, the MJD47T4 can be used in switching applications, but be aware of the maximum switching frequency (fs) and the minimum on-time (ton). The maximum fs is 100 kHz, and the minimum ton is 1 μs.
• How do I protect the MJD47T4 from electrostatic discharge (ESD)?
  To protect the MJD47T4 from ESD, use an ESD protection diode (e.g., 1.5KE6.8A) between the base and emitter, and ensure the PCB has an ESD protection network.