dc1619a DC1619A LT3845AEFE Demo Board | 16V ≤ VIN ≤ 60V, VOUT = 12V @ 10A DC1619A Demonstration Circuit 1619A is a 100kHz to 500kHz programmable frequency, high voltage, current mode DC/DC step-down converter featuring the LT3845A. The operating frequency can be synchronized up to 600kHz. This demo board is designed for 12V output at up to 10A (120W) from a 16V to 60V input.