HV9123NG-G

DC DC Switching Controllers Overview

The HV9123NG-G is a high-voltage current-mode PWM controller designed for flyback converter topologies. It operates with a fixed switching frequency of 3MHz and supports a maximum duty cycle of 97%. The device accepts a wide supply voltage range from 10V to 450V, enabling direct startup from various DC sources. It features an integrated transistor driver for external power switches and includes control characteristics such as enable, frequency control, and reset functions. The component is housed in a 16-SOIC package and is rated for junction temperatures between -55°C and 125°C.

DC DC Switching Controllers Feature Summary

• Supports high-voltage operation with a supply range up to 450V
• Integrates a transistor driver for external switch control
• Provides precise reference accuracy for stable regulation

DC DC Switching Controllers Applications

• High-voltage flyback power supplies
• Direct battery-powered systems
• Industrial power conversion circuits

DC DC Switching Controllers Procurement Notes

Verify the specific suffix and packaging configuration when ordering, as availability may vary between tubes and cut tapes. Confirm that the application environment remains within the specified thermal limits. Ensure compatibility with the required flyback topology before procurement. Cross-reference the datasheet revision to confirm electrical characteristics match design requirements.

DC DC Switching Controllers Selection Notes

Select this controller for applications requiring high input voltages without auxiliary winding complexity. The 3MHz frequency allows for smaller passive components compared to lower-frequency alternatives. Consider the 16-SOIC package constraints for PCB layout. Evaluate thermal management needs given the wide operating temperature range and high-voltage capabilities.

DC DC Switching Controllers Part Context

This component belongs to the HV912x series of high-voltage switching controllers from Microchip Technology. It is derived from Supertex technology and merged into Microchip's product line. The series is designed for robust performance in isolated power conversion applications where high input voltage tolerance is critical.

DC DC Switching Controllers Replacement Considerations

The HV9120 is a related part in the same family but operates at a different switching frequency. Verify pinout compatibility and electrical specifications when substituting. Ensure the alternative part supports the required flyback topology and voltage range.