LM2578AM/NOPB datasheet by Texas Instruments

LM2578AM/NOPB Frequently Asked Questions (FAQs)

• What is the maximum input voltage that can be applied to the LM2578AM/NOPB?
  The maximum input voltage that can be applied to the LM2578AM/NOPB is 40V. Exceeding this voltage can cause damage to the device.
• How do I ensure the stability of the output voltage?
  To ensure the stability of the output voltage, it is recommended to use a minimum output capacitance of 10uF with an ESR of less than 1 ohm. Additionally, the output voltage can be stabilized by adding a 10nF capacitor between the output and ground.
• What is the maximum output current that the LM2578AM/NOPB can provide?
  The maximum output current that the LM2578AM/NOPB can provide is 3A. Exceeding this current can cause overheating and damage to the device.
• How do I choose the correct inductor value for my application?
  The inductor value depends on the input voltage, output voltage, and output current. A general rule of thumb is to choose an inductor with a value between 10uH and 100uH. The datasheet provides a formula to calculate the inductor value based on the application requirements.
• What is the purpose of the feedback pin (FB) and how do I use it?
  The feedback pin (FB) is used to regulate the output voltage. It is connected to the output voltage through a resistive divider network. The feedback voltage is compared to an internal reference voltage to regulate the output voltage. The datasheet provides a formula to calculate the resistive divider values based on the desired output voltage.