L297/1 datasheet by STMicroelectronics

L297/1 Frequently Asked Questions (FAQs)

• What is the maximum voltage that can be applied to the VCC pin?
  The maximum voltage that can be applied to the VCC pin is 20V, but it's recommended to keep it between 8V and 15V for optimal performance.
• How do I choose the right value for the sense resistors (Rs) and the capacitor (Ct) in the current sensing circuit?
  The value of Rs and Ct depends on the maximum current and the desired current sensing accuracy. A good starting point is to use Rs = 0.1 ohm and Ct = 2.2nF, and then adjust based on the specific application requirements.
• What is the purpose of the bootstrap capacitor (Cb) and how do I choose its value?
  The bootstrap capacitor (Cb) is used to generate the high-side gate drive voltage. A good value for Cb is between 10nF and 100nF, depending on the switching frequency and the gate drive current requirements.
• How do I ensure that the L297/1 is properly synchronized with the external oscillator or clock signal?
  To ensure proper synchronization, the external oscillator or clock signal should be connected to the CLKIN pin, and the SYNC pin should be tied to VCC. The L297/1 will then synchronize its internal clock with the external clock signal.
• What is the maximum frequency that the L297/1 can operate at?
  The L297/1 can operate up to 100 kHz, but the maximum frequency depends on the specific application and the external components used.