LT1950IGN#PBF

Overview

The LT1950IGN#PBF is a single switch PWM controller with an auxiliary boost converter, manufactured by Analog Devices Inc. It supports wide input range forward, boost, flyback, and SEPIC topologies. The device drives an N-channel power MOSFET using few external components. Key electrical parameters include a supply voltage range of 3V to 25V, a switching frequency range of 100kHz to 500kHz, and a maximum duty cycle of 95%. It features one output phase and is housed in a 16-SSOP package.

Feature Summary

• Supports multiple converter topologies including forward, boost, flyback, and SEPIC configurations
• Integrates an auxiliary boost converter for enhanced functionality
• Designed to drive N-channel power MOSFETs with minimal external component requirements

Applications

• High efficiency isolated forward converters
• Boost converter designs
• Flyback converter applications
• SEPIC regulator implementations

Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance when sourcing. Confirm the SSOP-16 package dimensions match your PCB footprint requirements. Ensure the supplier provides official Analog Devices documentation to validate authenticity. Cross-reference the part number against current manufacturer catalogs to avoid obsolete or discontinued variants.

Selection Notes

Select this controller for applications requiring flexible topology support such as forward, boost, flyback, or SEPIC. It is suitable for designs needing an auxiliary boost function alongside main regulation. Consider the 3V to 25V supply range and up to 500kHz switching frequency for compatibility with your system constraints. Verify N-channel MOSFET gate drive requirements align with the controller's output capabilities.

Part Context

The LT1950 belongs to Analog Devices' family of switching voltage regulators. It is specifically designed as a versatile PWM controller capable of handling various DC-DC conversion topologies. The IGN#PBF designation identifies the industrial temperature grade version in a surface-mount SSOP package, distinguishing it from other thermal or packaging variants within the same product line.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult Analog Devices official resources for direct replacements or pin-compatible alternatives if this specific part is unavailable.

FAQ

What converter topologies does the LT1950 support?

The LT1950 supports forward, boost, flyback, and SEPIC converter topologies.

What is the maximum duty cycle of the LT1950?

The maximum duty cycle of the LT1950 is 95%.