LT1249IS8#PBF

Overview

The LT1249IS8#PBF is a power factor controller manufactured by Analog Devices Inc., designed for high-efficiency AC-DC power conversion. It operates within a supply voltage range of 8.2V to 25V and supports switching frequencies up to 100kHz. The device features a maximum duty cycle of 48% and delivers an output current capability of 1A. It is housed in an 8-pin PDIP package, suitable for through-hole mounting, and functions reliably across an operating temperature range of 0°C to 100°C.

Feature Summary

• Integrated power factor correction control for efficient energy management
• Supports high-speed pulse width modulation with defined rise and fall times
• Non-isolated buck topology operation for compact circuit design

Applications

• Power factor correction circuits in AC-DC adapters
• High-efficiency switch-mode power supplies
• Industrial power management systems requiring PFC compliance

Procurement Notes

Verify the specific suffix IS8 against official Analog Devices documentation to confirm package type and thermal characteristics. Ensure compatibility with existing PCB footprints for through-hole assembly. Cross-reference electrical parameters such as switching frequency and duty cycle limits with system requirements before integration.

Selection Notes

Select this component when designing non-isolated buck converters requiring integrated power factor correction. Consider the 100kHz switching frequency limit and 48% maximum duty cycle constraints during topology design. Evaluate the through-hole PDIP package suitability against board space and thermal management requirements.

Part Context

This part belongs to the LT1249 series of power factor controllers from Analog Devices. It is distinct from operational amplifiers or precision reference devices in the manufacturer's portfolio. The IS8 designation indicates a specific industrial-grade variant within the broader LT1249 family, optimized for robust performance in demanding environments.

Replacement Considerations

Direct substitutes include other power factor controllers from Linear Technology or compatible manufacturers offering similar buck topology support. Verify pinout compatibility and electrical specifications such as input voltage range and switching frequency before substitution.