LT8304HS8E-1#TRPBF

Overview

The LT8304HS8E-1#TRPBF is a high voltage isolated flyback converter from Analog Devices, designed for applications requiring wide input voltage ranges and galvanic isolation. It operates with an input voltage range of 3 V to 100 V and supports output voltages up to 150 V. The device delivers a switch current capability of 2 A and functions at a switching frequency of 350 kHz. It features a low quiescent current of 390 uA and operates within a temperature range of -40°C to +125°C. Packaged in an 8-SOIC (Narrow) with an exposed pad, this component integrates control circuitry for efficient power conversion without the need for optocouplers.

Feature Summary

• Eliminates the requirement for optocouplers and traditional feedback loops through integrated primary-side regulation capabilities.
• Supports high-voltage operation with an input range extending up to 100 V and output capabilities reaching 150 V.
• Provides flexible output configuration options allowing for positive or negative isolated voltage generation.

Applications

• Industrial power supplies requiring isolated outputs
• Battery chargers for electric vehicles and industrial equipment
• Telecommunications infrastructure power systems

Procurement Notes

Verify the specific suffix designation carefully during procurement, as it indicates the tape and reel packaging format distinct from tube variants. Confirm that the HS grade meets the required thermal performance specifications for your application environment. Ensure compatibility with the intended PCB footprint, specifically the 8-SOIC-N-EP package dimensions. Cross-reference the datasheet revision to confirm pinout consistency if replacing existing designs.

Selection Notes

Select this component when designing isolated converters that demand high input voltage tolerance without complex secondary-side feedback networks. Consider the thermal dissipation requirements associated with the SOIC-N-EP package for high-power density designs. Evaluate the 350 kHz switching frequency against electromagnetic interference constraints and transformer design parameters. Compare the 2 A switch current limit against peak load requirements to ensure adequate headroom.

Part Context

This part belongs to the LT8304 family of no-opto isolated flyback converters manufactured by Analog Devices. The family includes variants such as the LT8304IS8E#PBF and LT8304HS8E#PBF, which differ primarily in operating temperature grades and packaging formats. The LT8304 series is engineered to simplify isolated power supply designs by removing the optocoupler, thereby improving reliability and reducing component count in high-voltage applications.

Replacement Considerations

LT8304HS8E#PBF

FAQ

Does the LT8304HS8E-1#TRPBF require an optocoupler for regulation?

No, the LT8304 is designed as a no-opto isolated flyback converter, utilizing primary-side regulation to eliminate the need for an optocoupler and feedback resistor network typically found in isolated designs.

What is the maximum input voltage supported by this converter?

The LT8304HS8E-1#TRPBF supports a maximum input voltage of 100 V, making it suitable for high-voltage DC bus applications.