LM78S40CN/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM78S40CN/NOPB is a universal switching regulator subsystem manufactured by Texas Instruments. It operates in bipolar technology and utilizes current-mode control architecture. The device supports a maximum switching frequency of 100 kHz and delivers an output current capacity of 1.5 A. It is housed in a PDIP-16 package. This component functions as a complete switching power supply solution, integrating the necessary control logic for voltage regulation.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a complete switching regulator subsystem within a single package
• Employs current-mode control for stable operation
• Supports universal input voltage ranges

Voltage Regulators - DC DC Switching Regulators Applications

• Universal AC/DC power supplies
• Flyback converter designs
• Isolated DC/DC conversion systems

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'CN/NOPB' against the manufacturer's latest datasheet to confirm pinout compatibility and RoHS status. Ensure the ordering part number matches the exact package style required for your PCB footprint. Cross-reference the manufacturer's official documentation for any recent product change notices that may affect mechanical or electrical specifications.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a monolithic switching controller with integrated power stage capabilities is required. It is suitable for applications needing moderate power levels around 1.5 A without external high-current drivers. Consider thermal management requirements due to internal power dissipation in linear-like regulation modes during startup or fault conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM78S40 family of universal switching regulators. It serves as a legacy but robust solution for offline power applications. The NOPB suffix indicates lead-free manufacturing compliant with environmental directives. It replaces earlier versions like the LM78S40CN while maintaining functional equivalence.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct replacements include LM78S40CN and LM78S40. Verify pin-to-pin compatibility before substitution. Alternative modern controllers may offer higher efficiency but require different external component configurations.