L6202 datasheet by STMicroelectronics

L6202 Frequently Asked Questions (FAQs)

• What is the maximum operating frequency of the L6202?
  The maximum operating frequency of the L6202 is 200 kHz, but it can be operated at higher frequencies with reduced performance.
• How do I choose the right sense resistor value for my application?
  The sense resistor value depends on the desired current sensing accuracy and the maximum current of your application. A smaller sense resistor value provides better accuracy but increases power loss. A good starting point is to choose a sense resistor value that provides a voltage drop of around 0.5-1V at the maximum current.
• What is the purpose of the bootstrap capacitor (CB) in the L6202?
  The bootstrap capacitor (CB) is used to generate the high-side gate drive voltage for the power MOSFET. It is charged through the bootstrap diode (DB) when the low-side MOSFET is on, and discharges when the high-side MOSFET is on, providing the necessary voltage to drive the high-side MOSFET.
• How do I protect the L6202 from overcurrent and overheating?
  The L6202 has built-in overcurrent protection, but it's still important to add external protection mechanisms such as fuses or PTC resistors to prevent damage from excessive currents. Additionally, ensure good thermal design and heat sinking to prevent overheating.
• Can I use the L6202 in a synchronous rectification configuration?
  Yes, the L6202 can be used in a synchronous rectification configuration, where the low-side MOSFET is used as a synchronous rectifier. This can improve efficiency and reduce power loss.