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Analog Devices Inc. EVAL-LT8350-AZ Evaluation Board features the LT8350 40V synchronous buck-boost converter. The LT8350 provides up to 2.5A load at 12V output when VIN is between 9V and 40V and will run down to 3VIN with reduced output current. The ADI EVAL-LT8350-AZ operates at 350kHz switching frequency with spread spectrum frequency modulation (SSFM) disabled. The switching frequency of the LT8350 is spread by the SSFM from fSW to fSW +25% for reduced EMI emission when enabled.
The ADI EVAL-LT8350-AZ Evaluation Board adjusts the Undervoltage lockout with a few simple resistor options. The board is designed with small, high-frequency ceramic input and output capacitors placed near the VIN and VOUT pins for a reduction in radiated EMI. An inductor EMI filter and a small ferrite bead EMI filter are mounted on the input and output of EVAL-LT8350-AZ. Combined with proper board layout and SSFM, these filters effectively reduce EMI to pass CISPR25 class 5 conducted EMI.
