FAN4803CS2X

Overview

The FAN4803CS2X is an integrated Power Factor Correction (PFC) and Pulse Width Modulation (PWM) controller combo designed for space-constrained switched-mode power supplies. It operates in average current mode with a fixed switching frequency of 67 kHz. The device supports a supply voltage range of 10 V to 15 V and features low start-up current of 200 µA. It is housed in an 8-SOIC surface-mount package and functions within an operating temperature range of 0°C to 70°C.

Feature Summary

• Integrates internally synchronized PFC and PWM controllers into a single 8-pin IC to reduce component count and board space.
• Utilizes patented one-pin voltage error amplifier technology with advanced input current shaping techniques.
• Employs synchronized leading and trailing edge modulation to minimize ripple current in the storage capacitor between stages.

Applications

• Power factor corrected switched-mode power supplies
• Applications requiring compliance with IEC1000-3-2 specifications
• Space-constrained power supply designs

Procurement Notes

Verify component authenticity through authorized channels as this part is discontinued. Confirm RoHS status and moisture sensitivity level prior to assembly. Review official datasheets for handling requirements and ensure compatibility with existing design constraints given the end-of-life status.

Selection Notes

Select this component for designs prioritizing integration and reduced bill of materials over new development. Evaluate thermal performance within the specified 0°C to 70°C range. Consider the fixed 67 kHz frequency when designing magnetic components and filter capacitors for the target application.

Part Context

This component belongs to the FAN4803 series of PFC/PWM controller combos from onsemi. It represents a legacy solution for high-efficiency power conversion, offering a compact alternative to discrete controller implementations. The CS2X suffix denotes the specific tape-and-reel packaging variant of the SOIC-8 package.

Replacement Considerations

The FAN4803CS1X is a verified substitute within the same family, sharing identical electrical characteristics and pinout configuration while differing only in packaging format.