LT4320
LT4320-1

RECOMMENDED FOR NEW DESIGNS

Ideal Diode Bridge Controller

Data Sheet Product Selection Table
Part Models
24
1ku List Price
Starting From $3.54
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Part Details

  • 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
LT4320
LT4320-1
Ideal Diode Bridge Controller
Thermograph of Passive Diode Bridge Product Package 1 Product Package 2 Product Package 3
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 4

Design Note 1

Technical Articles 3

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Hardware Ecosystem

Parts Product Life Cycle Description
PowerPath, Ideal Diodes, and Load Switches 1
LT4321
RECOMMENDED FOR NEW DESIGNS PoE Ideal Diode Bridge Controller
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Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

  • LT4320
  • LT4320-1
LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

eval board
schematic 1
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DC1902B

LT4320IDD Demo Board | 200W Ideal Diode Bridge Full-Wave Rectifier (9V to 60V, 3.5A)

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Product Details

DC1902B: Demo Board for the LT4320/LT4320-1 Ideal Diode Bridge Controller.

eval board
schematic 6
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DC1823B

LT4320IDD Demo Board | 1.2kW Ideal Diode Bridge Full-Wave Rectifier [9V to 40V, 30A]

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Product Details

Demonstration circuit 1823B features the LT4320, an ideal diode bridge controller  suitable for applications that require high current AC to DC full-wave rectification or DC polarity correction. With an AC input, the input voltage range is 12VAC to 24VAC, the output voltage can be as high as 70V, and the output current can be as high as 1.5A. The AC current is limited by the capacitance provided on the demo board and can be increased up to 17A with additional load capacitance. The DC input voltage range is 9V up to 40V, and the maximum DC output current is 30A.


The LT4320 drives four N-channel MOSFETs to perform full-wave rectification functionally similar to a discrete diode bridge but with much lower power dissipation. This topology eases thermal design, and increases usable output voltage. In addition, an all N-channel topology has benefits over a P-channel topology such as a wider selection of MOSFETs, lower cost, lower RDS(ON), and smaller footprint.

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DC2465A

LT4320IDD-1 3-Phase Ideal Diode Bridge Rectifier [9VAC to 48VAC L-L, 25A]

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Product Details

Demonstration circuit 2465A is a 3-phase ideal diode bridge using three LT4320 controllers and six N-channel FETs. This demo board provides highly efficient 3-phase rectification with an input voltage range from 5VAC to 28VAC RMS (line to neutral) and maximum load current of 25A.


 


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DC2047A-A

LT4276B/LT4321 Demo Board | PoE+ (25W, 12V/1.9A) PD with DC/DC, Ideal Diode Bridge and 9V-57V AUX

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Product Details

Demonstration circuit 2047A-A is an IEEE802.3at compliant Power over Ethernet (PoE) Powered Device (PD) with support for 9-57VDC and 24VAC auxiliary supply input. It features the LT4276 PD interface and switching regulator controller, the LT4321 PoE ideal diode bridge controller, and the LT4320 ideal diode bridge controller.
DC1902B
LT4320IDD Demo Board | 200W Ideal Diode Bridge Full-Wave Rectifier (9V to 60V, 3.5A)
DC1902B Demo Board DC1902B Demo Board DC1902B Demo Board DC1902B Demo Board DC1902B - Schematic
DC1823B
LT4320IDD Demo Board | 1.2kW Ideal Diode Bridge Full-Wave Rectifier [9V to 40V, 30A]
DC1823B Demo Board DC1823B Demo Board DC1823B Demo Board DC1823B Demo Board DC1823B - Schematic
DC2465A
LT4320IDD-1 3-Phase Ideal Diode Bridge Rectifier [9VAC to 48VAC L-L, 25A]
DC2465A Demo Board DC2465A Demo Board DC2465A Demo Board DC2465A Demo Board DC2465A - Demo Board Image DC2465A - Schematic
DC2047A-A
LT4276B/LT4321 Demo Board | PoE+ (25W, 12V/1.9A) PD with DC/DC, Ideal Diode Bridge and 9V-57V AUX
DC2047A-A Evaluation Board DC2047A-A Evaluation Board - Top View DC2047A-A Evaluation Board - Bottom View DC2047A-A - Schematic

Latest Discussions

2 Years Ago
RE: LT4320-1 Low load (controller minimum threshold voltage not reached)
2 Years Ago
RE: LT4320 ESD rating
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