LT4320/LT4320-1 - Ideal Diode Bridge Controller

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 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.

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.

Features
  • Maximizes Power Efficiency
  • Eliminates Thermal Design Problems
  • DC to 600Hz
  • 9V to 72V Operating Voltage Range
  • IQ = 1.5mA (Typical)
  • Maximizes Available Voltage
  • Available in 8-Lead (3mm × 3mm) DFN, 12-Lead?MSOP and 8-Lead PDIP Packages
Typical Application
LT4320 Typical Application
LT4320 Typical Application
Applications
  • Security Cameras
  • Terrestrial or Airborne Power Distribution Systems
  • Power-over-Ethernet Powered Device with a?Secondary Input
  • Polarity-Agnostic Power Input
  • Diode Bridge Replacement
Packaging
LT4320 Package Drawing
LT4320 Package Drawing
LT4320 Package Drawing
Order Information
Part NumberPackageTempPrice(1-99)Price (1k)*
LT4320HDD-1#PBF3x3 DFN-8H$5.36$3.75
LT4320HDD-1#TRPBF3x3 DFN-8H$5.42$3.81
LT4320HDD#PBF3x3 DFN-8H$4.93$3.45
LT4320HDD#TRPBF3x3 DFN-8H$4.99$3.51
LT4320HMSE-1#PBFMS-12EH$5.36$3.75
LT4320HMSE-1#TRPBFMS-12EH$5.42$3.81
LT4320HMSE#PBFMS-12EH$4.93$3.45
LT4320HMSE#TRPBFMS-12EH$4.99$3.51
LT4320HN8-1#PBFN-8H$6.51$4.56
LT4320HN8#PBFN-8H$6.10$4.27
LT4320IDD-1#PBF3x3 DFN-8I$4.64$3.25
LT4320IDD-1#TRPBF3x3 DFN-8I$3.31
LT4320IDD#PBF3x3 DFN-8I$4.21$2.95
LT4320IDD#TRPBF3x3 DFN-8I$3.01
LT4320IMSE-1#PBFMS-12EI$4.64$3.25
LT4320IMSE-1#TRPBFMS-12EI$3.31
LT4320IMSE#PBFMS-12EI$4.21$2.95
LT4320IMSE#TRPBFMS-12EI$3.01
LT4320IN8-1#PBFN-8I$5.64$3.95
LT4320IN8#PBFN-8I$5.21$3.65
LT4320MPMSE-1#PBFMS-12EMP$13.93$9.75
LT4320MPMSE-1#TRPBFMS-12EMP$13.99$9.81
LT4320MPMSE#PBFMS-12EMP$12.64$8.85
LT4320MPMSE#TRPBFMS-12EMP$12.70$8.91
Demo Boards
Part NumberDescriptionPrice
DC1823BLT4320IDD Demo Board | 1.2kW Ideal Diode Bridge Full-Wave Rectifier [9V to 40V, 30A]$75.00
DC1902BLT4320IDD Demo Board | 200W Ideal Diode Bridge Full-Wave Rectifier [9V to 60V, 3.5A]$75.00
DC2047A-ALT4276B/LT4321 Demo Board | PoE+ (25W, 12V/1.9A) PD with DC/DC, Ideal Diode Bridge and 9V-57V AUX$95.00
DC2465ALT4320IDD-1 3-Phase Ideal Diode Bridge Rectifier [9VAC to 48VAC L-L, 25A]$125.00
Datasheet
Design Note
Reliability Data
Product Selector Card
LT Journal
Press Release
CAD Symbol
Video
Ad
LTspice
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