LT1509IN#PBF

Overview

The LT1509IN#PBF is a complete solution for universal off-line switching power supplies utilizing active power factor correction. It integrates PFC and PWM control functions within a single package. The device operates in average current mode with a fixed switching frequency of 100kHz. It supports a supply voltage up to 27V and functions reliably across an operating temperature range of -40°C to 125°C. The component is designed for through-hole mounting, providing a robust implementation for power factor correction applications.

Feature Summary

• Integrates active power factor correction and pulse width modulation control into a single chip
• Operates using average current mode control technique
• Designed specifically for universal off-line switching power supply architectures

Applications

• Universal off-line switching power supplies
• Active power factor correction circuits
• Power factor and PWM controller implementations

Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance when sourcing. Confirm the manufacturer designation as Analog Devices Inc., noting its lineage from Linear Technology. Ensure the package type matches the required through-hole footprint for your PCB design. Cross-reference the datasheet revision to ensure compatibility with your system requirements before finalizing procurement.

Selection Notes

Select this component when a unified PFC and PWM solution is required for off-line applications. The 100kHz switching frequency offers a balance between efficiency and component size. Consider the 27V supply limit and -40°C to 125°C temperature range for environmental suitability. The through-hole package is suitable for prototyping or high-reliability industrial designs requiring mechanical stability.

Part Context

This part belongs to the LT1509 family of power management integrated circuits. It serves as a specialized controller for improving power quality in AC-DC conversion systems. The integration of PFC and PWM functions reduces the bill of materials and board space compared to discrete solutions. It is categorized under PMIC PFC controllers within the broader analog signal processing portfolio.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify pinout and electrical specifications carefully if considering alternative controllers from other manufacturers. No direct cross-reference data is documented for this specific part number.