LM78S40N

Voltage Regulators - DC DC Switching Regulators Overview

The LM78S40N is a universal switching regulator subsystem manufactured by Texas Instruments in a PDIP-16 package. It operates as a current-mode controller with a maximum switching frequency of 100 kHz and supports output currents up to 1.5 A. The device utilizes bipolar technology and integrates essential control functions for power supply designs.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a complete switching regulator subsystem within a single component
• Employs current-mode control architecture for stable regulation
• Supports universal input voltage ranges for versatile application

Voltage Regulators - DC DC Switching Regulators Applications

• Universal AC/DC converter designs
• Flyback power supply implementations
• Buck-boost topology circuits

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix against official datasheets to confirm pinout compatibility and electrical specifications. Ensure the procurement channel provides genuine components from authorized sources to avoid counterfeit risks associated with legacy semiconductor parts.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when designing cost-effective power supplies requiring integrated control logic. Evaluate thermal management requirements for the 1.5 A output capability and ensure the external transformer and rectifier components match the 100 kHz switching frequency constraints.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM78S40 family of universal switching regulators. It serves as a foundational control IC for offline power conversion applications, offering a compact solution compared to discrete controller implementations.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Consult official substitution guides for equivalents such as the LM78S40CN/NOPB or UA78S40 variants. Verify functional compatibility before replacing legacy units.