TPS23521EVM-001 Controller Evaluation Module Texas Instruments TPS23521EVM-001 Controller Evaluation Module (EVM) contains evaluation and reference circuitry for the TPS23521. The TPS23521 is a low side Hotswap controller with soft start targeted at telecom applications. The Texas Instruments TPS23521EVM-001 gives a jump start to anyone designing a –48V system. It includes input clamping to support lightning surge (up to 2kV), various FET placeholders to support various power levels, and an output inductor to mimic any EMI filter before the DC/DC converter.