20V DC/DC konverter minimerer induktor-footprint

Texas Instruments (TI) introduces the first analog DC/DC step-down controller with remote bipolar junction transistor (BJT) temperature-compensated inductor current sensing that minimizes total solution footprint in high-power POL conversion.

The 20-V LM27403 DC/DC synchronous buck controller provides greater than 95-percent efficiency from a 12-V input at 25 A of output current to optimize solution size and deliver fast transient response in communications infrastructure, industrial, medical and power module applications.

Used in conjunction with TI's WEBENCH online design tool, the LM27403 simplifies DC/DC conversion and speeds the design process. For more information, samples and evaluation modules, visit www.ti.com/lm27403-pr-eu. Watch a video on how to design a high performance converter here.

The temperature-compensated inductor DC resistance sensing improves the current limit accuracy to 10 percent over temperature by using a low-cost BJT to measure real-time temperature shifts, allowing the LM27403 to maintain a consistent current limit threshold across the operating temperature range. The current limit accuracy over temperature results in a smaller DC/DC converter footprint that reduces inductor over-design and allows for the use of smaller and lower-cost inductors. Watch a video demonstration of temperature-compensated inductor current sensing here.

The LM27403 provides a complete dynamic voltage solution when designed together with TI’s LM10011 voltage identification (VID) interface controller and 30-V CSD87350Q5D synchronous buck NexFET Power Block MOSFET to adjust the core voltage (VCORE) of a VID-enabled processor, such as TI's TMS320C6000 power-optimized DSPs and KeyStone based multicore DSPs.