MC34023P

AC DC Converters, Offline Switchers Overview

The MC34023P is a high-speed single-ended PWM controller manufactured by onsemi. It operates from a supply voltage range of 8 V to 30 V and supports switching frequencies up to 500 kHz. The device features an adjustable oscillator with external timing components, a fixed 1.25 V reference voltage, and a current-limited output capable of sourcing or sinking 200 mA. It includes under-voltage lockout, soft-start functionality, and a shutdown pin for power management.

AC DC Converters, Offline Switchers Feature Summary

• High-speed operation supporting switching frequencies up to 500 kHz
• Integrated current-limited output driver with 200 mA source/sink capability
• Built-in under-voltage lockout and programmable soft-start circuitry

AC DC Converters, Offline Switchers Applications

• Flyback switch-mode power supplies
• Forward converter topologies
• Isolated DC-DC conversion systems

AC DC Converters, Offline Switchers Procurement Notes

Verify the package marking and date code against the official datasheet revision history. Confirm that the component meets RoHS compliance requirements if applicable to your design specifications. Ensure the supplier provides traceability documentation consistent with onsemi manufacturing standards.

AC DC Converters, Offline Switchers Selection Notes

Select this controller for applications requiring high-frequency operation and robust drive capability. It is suitable for designs needing integrated protection features such as under-voltage lockout and soft-start. Consider thermal management requirements when designing for continuous high-current output stages.

AC DC Converters, Offline Switchers Part Context

This component belongs to the MC3402x series of PWM controllers, designed for efficient power conversion. It serves as a core control element in isolated power supply architectures, offering precise regulation and protection mechanisms essential for reliable industrial and commercial power systems.

AC DC Converters, Offline Switchers Replacement Considerations

The UC1823 from Texas Instruments is a documented functional substitute within the same high-speed PWM controller category. Verify pin compatibility and electrical parameter alignment before implementation.