LT4320-1

Features Maximizes Power Efficiency n Eliminates Thermal Design Problems n DC to 600Hz n 9V to 72V Operating Voltage Range n I = 1.5mA (Typical) Q n Maximizes Available Voltage n Available in 8-Lead (3mm × 3mm) DFN, 12-Lead MSOP and 8-Lead PDIP Packages n LT4320/LT4320-1 Ideal Diode Bridge Controller Description The LT®4320/LT4320-1 are ideal diode bridge controllers that drive four N-channel MOSFETs, supporting voltage rectification from DC to 600Hz typical. By maximizing available voltage and reducing power dissipation (see thermograph comparison below), 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, costly heat sinks, and greatly reduces PC board area. The LT4320’s internal charge pump supports an allNMOS 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. The LT4320 is designed for DC to 60Hz typical voltage rectification, while the LT4320-1 is designed for DC to 600Hz typical voltage rectification. Higher frequencies of operation are possible depending on MOSFET size and operating load current. Applications Security Cameras Terrestrial or Airborne Power Distribution Systems n Power-over-Ethernet Powered Device with a Secondary Input n Polarity-Agnostic Power Input n Diode Bridge Replacement n n L, LT, LTC, LTM, L...