LT1248IS#TRPBF

Overview

The LT1248IS#TRPBF is a power factor correction controller from Analog Devices Inc., designed for universal off-line power systems. It utilizes fixed high-frequency PWM current averaging to achieve high power factor over a wide load range. The device operates at a switching frequency of 300 kHz and supports an input bias voltage range of 11.5 V to 25 V. It features instantaneous overvoltage protection and a typical input bias current of -25 nA. Packaged in a 16-lead SOIC, it belongs to the LT1248 series within the PMIC category.

Feature Summary

• Provides active power factor correction using fixed high-frequency PWM current averaging
• Delivers high power factor across a wide load range with line current averaging
• Includes instantaneous overvoltage protection functionality

Applications

• Universal off-line power systems
• Power factor correction circuits
• Power management IC applications

Procurement Notes

Verify the specific suffix #TRPBF indicates tape-and-reel packaging when sourcing. Confirm the manufacturer is Analog Devices Inc. or its predecessor Linear Technology. Ensure the component matches the 16-lead SOIC package and 300 kHz switching frequency specifications. Cross-reference the datasheet for exact electrical limits before integration.

Selection Notes

Select this component for designs requiring active PFC in universal input environments. The 300 kHz switching frequency offers a balance between efficiency and component size. Consider the 16-lead SOIC package for surface-mount assembly requirements. Verify compatibility with the required input voltage range of 11.5 V to 25 V for the control circuitry.

Part Context

This part belongs to the LT1248 series of power factor controllers. It is manufactured by Analog Devices Inc., which acquired Linear Technology. The device is categorized under Power Management ICs (PMIC) specifically for Power Factor Correction (PFC). It serves as a key component for improving efficiency in AC-DC conversion stages.

Replacement Considerations

LT1248IS#PBF is a verified pin-compatible alternative in a tube package. LT1248CN#PBF is another variant in the same family but operates at a different switching frequency of 100 kHz. Verify functional equivalence regarding switching speed and package type before substitution.