LT4320 Ideal Diode Bridge Controllers

By Analog Devices Inc 104

LT4320 Ideal Diode Bridge Controllers

Linear Technology's LT4320 / LT4320-1 are ideal diode bridge controllers that drive four N-channel MOSFETs, supporting voltage rectification from DC to 600 Hz. By maximizing available voltage and reducing power dissipation, the ideal diode bridge simplifies power supply design and reduces power supply cost, especially in low-voltage applications.

An ideal diode bridge also eliminates thermal design problems and costly heat sinks, as well as greatly reducing PC board area. The LT4320's internal charge pump supports an all- NMOS design, which eliminates larger and more costly PMOS switches. If the power source fails or is shorted, a fast turn-off minimizes reverse current transients.

Applications include security cameras, terrestrial or airborne power distribution systems, power-over-Ethernet powered device with a secondary input, polarity-agnostic power input, and diode bridge replacement.