L2720 datasheet by STMicroelectronics

L2720 Frequently Asked Questions (FAQs)

• What is the maximum output current of the L2720?
  The maximum output current of the L2720 is 3A per channel, but it's recommended to limit it to 2A per channel for reliable operation and to prevent overheating.
• How do I ensure the L2720 operates within its safe operating area (SOA)?
  To ensure the L2720 operates within its SOA, you should monitor the junction temperature, output current, and input voltage. Make sure to keep the junction temperature below 150°C, output current below 2A per channel, and input voltage within the recommended range.
• What is the purpose of the bootstrap capacitor (CB) in the L2720?
  The bootstrap capacitor (CB) is used to generate the high-side gate drive voltage for the internal power MOSFETs. It's essential to choose a capacitor with a high voltage rating and low ESR to ensure proper operation.
• How do I calculate the minimum input capacitance (CIN) required for the L2720?
  The minimum input capacitance (CIN) can be calculated using the formula: CIN = (IOUT x VOUT) / (fSW x ΔV). Where IOUT is the output current, VOUT is the output voltage, fSW is the switching frequency, and ΔV is the input voltage ripple.
• What is the recommended layout and PCB design for the L2720?
  For optimal performance and thermal management, it's recommended to follow a 4-layer PCB design with a dedicated ground plane, keep the input and output capacitors close to the IC, and use a thermal pad or heat sink for the L2720.