LT4320 File Test

The LT4320/LT4320-1 are ideal diode bridge controllers that drive four N-channel MOSFETs, supporting voltage rectification from DC to 600Hz. By maximizing available voltage and reducing power dissipation (see thermograph comparison above), the ideal diode bridge simplifies power supply design and reduces power supply cost, especially in low voltage applications. The LT4320's robustness is demonstrated via the dreaded “file test”. Since the file (also known as a rasp) has many teeth, lightly scraping the AC power source's output terminal over the file applies power intermittently in rapid succession to the ideal diode circuit.