TPS22949AYZPR datasheet by Texas Instruments

TPS22949AYZPR Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal performance?
  Texas Instruments provides a recommended PCB layout in the datasheet (Figure 23) and in the application note SLVA883. It's essential to follow these guidelines to minimize parasitic inductance and ensure proper operation.
• How do I choose the correct input capacitor value?
  The input capacitor value depends on the input voltage, output current, and desired ripple voltage. A general guideline is to use a capacitor with a value between 1-10 μF, with a voltage rating at least 1.5 times the input voltage. TI's Webench Power Designer tool can help with capacitor selection.
• What is the maximum output current I can get from this device?
  The TPS22949AYZPR has a maximum output current rating of 2 A. However, the actual output current may be limited by the input voltage, output voltage, and thermal considerations. Be sure to check the device's thermal performance and power dissipation to ensure reliable operation.
• How do I implement overcurrent protection (OCP) with this device?
  The TPS22949AYZPR has a built-in overcurrent protection feature. To implement OCP, connect a sense resistor (Rs) between the output and GND, and set the OCP threshold voltage (Vocp) using an external resistor divider. The device will limit the output current to the set threshold during an overcurrent event.
• What is the purpose of the EN pin, and how do I use it?
  The EN (enable) pin is used to turn the device on or off. When EN is high, the device is enabled, and when EN is low, the device is disabled. You can use the EN pin to implement power sequencing, shutdown, or low-power modes in your system.