LT1950EGN#PBF

Overview

The LT1950EGN#PBF is a single-switch PWM controller designed for wide input range applications, supporting forward, boost, flyback, and SEPIC converter topologies. It drives an N-channel power MOSFET with minimal external components. The device features current mode control with a switching frequency range of 100kHz to 500kHz and supports up to 20A output capability in appropriate configurations. Packaged in a 16-pin SSOP, it includes an auxiliary boost converter for high-side drive and offers programmable duty cycle clamping.

Feature Summary

• Supports multiple converter topologies including forward, boost, flyback, and SEPIC
• Integrates an auxiliary boost converter for efficient N-channel MOSFET driving
• Features current mode control architecture for stable regulation
• Allows programmable duty cycle clamping via a single resistor

Applications

• Wide input voltage DC-DC conversion systems
• Isolated power supply designs using flyback or forward topologies
• Non-isolated boost and SEPIC regulator circuits
• Industrial and automotive power management modules requiring flexible topology support

Procurement Notes

Verify the exact datasheet version from Analog Devices to confirm pinout and electrical characteristics. Ensure the SSOP-16 package matches your PCB footprint. Confirm that the #PBF suffix indicates lead-free compliance if required by your manufacturing process. Cross-reference the manufacturer part number with authorized distributors to avoid counterfeit components.

Selection Notes

Select this controller when a single IC must support multiple converter topologies without changing the core control logic. It is suitable for designs requiring wide input voltage ranges and efficient high-side drive for N-channel MOSFETs. Consider the 16-pin SSOP package constraints for thermal and space requirements. Evaluate the need for auxiliary boost generation versus external gate drive solutions.

Part Context

The LT1950 belongs to Analog Devices' family of switching voltage regulators and PWM controllers. It is specifically engineered for applications requiring flexibility in converter topology selection. The EGNSuffix denotes the commercial temperature grade and SSOP package type. The #PBF designation confirms RoHS compliance and halogen-free construction, aligning with modern environmental standards for electronic components.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Consult Analog Devices for potential cross-references based on specific electrical requirements and pin compatibility.