TS4990IDT datasheet by STMicroelectronics

TS4990IDT Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for the TS4990IDT to minimize EMI?
  A good PCB layout for the TS4990IDT involves keeping the input and output stages separate, using a star-ground configuration, and placing the device close to the power supply decoupling capacitors. Additionally, using a solid ground plane and minimizing track lengths can help reduce EMI.
• How do I ensure the TS4990IDT is stable and doesn't oscillate?
  To ensure stability, make sure to follow the recommended component values and PCB layout guidelines. Additionally, ensure that the input and output capacitors are of high quality and have low ESR. A minimum of 10uF capacitance on the output is recommended. Also, avoid using long wires or tracks for the feedback loop.
• What is the maximum input voltage that the TS4990IDT can handle?
  The TS4990IDT can handle input voltages up to 18V, but it's recommended to keep the input voltage below 15V to ensure reliable operation and minimize power dissipation.
• Can I use the TS4990IDT in a high-temperature environment?
  The TS4990IDT is rated for operation up to 125°C, but it's recommended to derate the output current and input voltage at higher temperatures to ensure reliable operation. Consult the datasheet for thermal derating guidelines.
• How do I protect the TS4990IDT from overcurrent and short-circuit conditions?
  The TS4990IDT has built-in overcurrent protection, but it's recommended to add external protection such as a fuse or a current-sensing resistor to detect overcurrent conditions. Additionally, ensure that the output is properly decoupled and the device is used within its recommended operating conditions.