TPN19008QM,LQ - Toshiba

TPN19008QM,LQ Frequently Asked Questions (FAQs)

• What is the recommended PCB layout and thermal design for optimal performance?
  Toshiba provides a recommended PCB layout and thermal design guide in their application notes. It's essential to follow these guidelines to ensure optimal performance, thermal management, and reliability.
• How do I select the right input and output capacitors for this device?
  The selection of input and output capacitors depends on the specific application requirements, such as voltage rating, capacitance value, and ESR. Toshiba recommends using low-ESR capacitors with a voltage rating of at least 1.5 times the maximum input voltage. A capacitance value of 10uF to 22uF is typically suitable for most applications.
• What is the maximum allowable voltage deviation for the input voltage?
  The maximum allowable voltage deviation for the input voltage is typically ±10% of the nominal input voltage. Exceeding this deviation may affect the device's performance, efficiency, and reliability.
• How do I ensure electromagnetic compatibility (EMC) and reduce electromagnetic interference (EMI) in my design?
  To ensure EMC and reduce EMI, follow proper PCB layout practices, use shielding, and implement filtering techniques. Toshiba recommends using a common-mode choke and a differential-mode filter to reduce EMI. Additionally, ensure that the device is placed in a shielded enclosure and follow the recommended layout guidelines.
• What is the device's behavior during startup and shutdown?
  During startup, the device has a soft-start feature that gradually increases the output voltage to prevent inrush currents. During shutdown, the device has an internal undervoltage lockout (UVLO) circuit that ensures the output voltage is fully discharged before the device turns off.