UCC28070PW datasheet by Texas Instruments

UCC28070PW Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for the UCC28070PW to minimize EMI?
  A good PCB layout for the UCC28070PW involves keeping the high-frequency switching nodes (e.g., SW and VIN) away from sensitive analog nodes, using a solid ground plane, and minimizing loop areas. TI provides a recommended layout in the datasheet and application notes.
• How do I choose the right inductor value for my design?
  The inductor value depends on the input voltage, output voltage, and desired switching frequency. A good starting point is to use the inductor selection guide in the datasheet or TI's Power Stage Designer tool. You can also use the following formula: L = (VIN * (1 - D)) / (ΔI * f_sw), where D is the duty cycle, ΔI is the inductor ripple current, and f_sw is the switching frequency.
• What is the maximum junction temperature (Tj) for the UCC28070PW?
  The maximum junction temperature (Tj) for the UCC28070PW is 150°C. It's essential to ensure that the device operates within this temperature range to prevent damage and ensure reliability.
• How do I implement overcurrent protection (OCP) with the UCC28070PW?
  The UCC28070PW has a built-in OCP feature. You can set the OCP threshold by connecting a resistor (R_OCP) between the OCP pin and GND. The OCP threshold voltage is 0.5V, and the device will shut down if the current exceeds the set threshold.
• Can I use the UCC28070PW in a synchronous rectification topology?
  Yes, the UCC28070PW can be used in a synchronous rectification topology. The device has a built-in synchronous rectifier driver, which can be enabled by connecting the SR pin to a voltage source. This can improve efficiency and reduce power losses.