LT4320HDD-1#PBF

Overview

The LT4320HDD-1#PBF is an ideal diode bridge controller manufactured by Analog Devices Inc., designed for high-voltage power management applications. It operates within a supply voltage range of 9 V to 72 V and supports input voltages up to 72 V. The device features a low quiescent current of 1.5 mA, ensuring efficient power consumption during operation. Packaged in an 8-lead DFN (DFN-8) surface-mount package, it is rated for industrial temperatures ranging from -40°C to +125°C. This component functions as an OR controller for bridge rectifiers, utilizing external N-channel FETs to emulate ideal diodes.

Feature Summary

• Controls external N-channel MOSFETs to create ideal diode bridges with minimal voltage drop
• Supports wide input voltage ranges suitable for high-voltage DC systems
• Operates reliably across extended industrial temperature environments

Applications

• High-voltage DC power distribution systems
• Redundant power supply architectures requiring seamless source switching
• Industrial equipment power management modules

Procurement Notes

Verify availability status directly with authorized distributors or the manufacturer, as supply constraints may apply. Confirm that the specific DFN-8 package variant matches your PCB footprint requirements. Ensure that external N-channel MOSFETs selected for the design are compatible with the controller's gate drive capabilities and voltage ratings. Validate thermal performance under maximum load conditions to maintain operation within the specified temperature limits.

Selection Notes

Select this component when designing systems requiring high-voltage ideal diode functionality with low standby power consumption. The 9 V to 72 V operating range makes it suitable for applications where standard low-voltage controllers are insufficient. Consider the DFN-8 package for compact designs requiring robust thermal dissipation through the exposed pad. Ensure the application does not require integrated internal switches, as this is a controller only.

Part Context

This part belongs to the LT4320 series of ideal diode bridge controllers from Analog Devices. The series is designed to replace traditional Schottky or silicon bridge rectifiers, offering superior efficiency by minimizing conduction losses. The LT4320 family provides flexible configurations for various voltage levels and packaging options, catering to diverse industrial and commercial power management needs.

Replacement Considerations

Direct substitutes include other parts within the LT4320 family, such as the LT4320IDD-1#TRPBF, which offers similar functionality in a tape-and-reel format. Verify pin compatibility and electrical specifications before substitution.