FAN4800ASMY

Overview

The FAN4800ASMY is a discontinued Power Factor Correction (PFC) and Pulse Width Modulation (PWM) controller combination from onsemi. It integrates PFC and PWM functions in a single 16-pin SOIC package, designed for boost PFC and PWM power supplies with minimal external components. The device supports Continuous Conduction Mode (CCM) and operates in voltage-mode control. Key electrical parameters include a maximum supply voltage of 28 V, a minimum operating voltage of 9.3 V, and a nominal input voltage of 15 V. It features an operating temperature range from -40°C to +105°C.

Feature Summary

• Integrates PFC and PWM controllers in a single IC to reduce component count
• Supports CCM operation with voltage-mode control
• Includes UVLO and PFC soft-start functionality absent in legacy models

Applications

• Boost PFC and PWM power supply designs
• Universal input AC-DC converters
• Power factor correction systems requiring integrated control

Procurement Notes

Verify the obsolete status before design-in. Confirm availability through authorized distributors or secondary markets. Check for RoHS compliance and material declarations. Ensure the SOIC-16 package matches your PCB footprint. Review datasheet revisions for any parameter changes.

Selection Notes

Select this part for applications requiring integrated PFC and PWM control in a compact SOIC package. Consider the 9.3 V to 28 V supply range and -40°C to +105°C operating temperature. Evaluate compatibility with existing ML4800/FAN4800 designs by adjusting RAC and RT/CT values as specified in replacement guidelines.

Part Context

Part of the FAN4800A/C series, which offers lower quiescent current than previous ML4800/FAN4800 generations. The series provides accurate 49.9% maximum PWM duty cycle for extended run times. It includes UVLO and soft-start features not present in earlier versions, enhancing system reliability and protection.

Replacement Considerations

Publicly confirmed substitutes are not explicitly listed in the provided documentation. When replacing legacy ML4800 or FAN4800 boards, adjust RAC to 6MΩ–8MΩ, set RT=6.8kΩ and CT=1000pF for 64kHz frequency, and verify VRMS at 1.224V for universal input compatibility.

FAQ

What control mode does the FAN4800ASMY support?

The FAN4800ASMY operates in voltage-mode control.

Does the FAN4800ASMY include UVLO and soft-start?

Yes, it includes under-voltage lockout (UVLO) and PFC soft-start functionality, which were not present in the original ML4800 and FAN4800.

What is the maximum supply voltage for the FAN4800ASMY?

The maximum supply voltage is 28 V.