LT8315HFE#PBF

Overview

The LT8315HFE#PBF is an isolated flyback converter from Analog Devices, designed for high-voltage applications with a wide input range of 18 V to 560 V. It supports up to 630 V output and delivers 300 mA current in a TSSOP-EP-20 package. Operating at a fixed frequency of 140 kHz, it features low quiescent current of 70 uA and functions reliably between -40°C and +150°C.

Feature Summary

• Integrated ultra-high voltage power switch rated for 560 V operation
• No-optocoupler feedback architecture utilizing primary-side regulation
• Extended thermal capability supporting operation up to +150°C

Applications

• High-voltage industrial power supplies
• Battery charging systems
• Medical equipment power stages

Procurement Notes

Verify the specific suffix against official documentation to confirm temperature grade and packaging type. The HFE designation indicates extended temperature performance. Confirm RoHS compliance status directly with the manufacturer or authorized distributors before finalizing procurement specifications.

Selection Notes

Select this component when designing isolated converters requiring high input voltages without optocouplers. Ensure the design accommodates the 140 kHz switching frequency and verify that the TSSOP-EP-20 package thermal dissipation meets system requirements for the intended load conditions.

Part Context

This device belongs to the LT8315 series of isolated flyback controllers. It shares core topology with variants like LT8315IFE but differs in operating temperature range. The series targets applications needing robust high-voltage conversion with simplified control loops.

Replacement Considerations

LT8315IFE#PBF offers identical electrical performance but is rated for a maximum operating temperature of +125°C instead of +150°C.