FAN7530N

Overview

The FAN7530N is a critical conduction mode (CRM) power factor correction (PFC) controller manufactured by Fairchild Semiconductor. It utilizes voltage-mode PWM to generate MOSFET turn-off signals without requiring rectified AC line voltage information, thereby reducing input sensing network power loss. The device features low startup current of 40µA and operating current of 1.5mA. It includes protection functions such as over-voltage protection, open-feedback protection, over-current protection, and under-voltage lockout with 3.5V hysteresis. The output driver provides +/-500/-800mA peak gate drive current.

Feature Summary

• Utilizes variable on-time control method for low total harmonic distortion
• Integrates open-feedback protection and disable function
• Includes zero current detector for efficient switching
• Features internal 150µs start-up timer

Applications

• Adapter
• Ballast
• LCD TV
• CRT TV
• SMPS

Procurement Notes

Verify the specific suffix 'N' against official datasheets to confirm package type, typically indicating DIP-8. Ensure compliance with RoHS standards if required. Confirm manufacturer origin as Fairchild Semiconductor or successor entities. Validate pinout compatibility with existing PCB layouts before procurement.

Selection Notes

Select this component for CRM PFC applications requiring low THD and minimal external components. Suitable for designs needing reduced standby power consumption through low quiescent current. Ideal for cost-sensitive applications in consumer electronics where high efficiency at light loads is critical.

Part Context

Part of the FAN7529/FAN7530 family of CRM PFC controllers designed for strict standby power and harmonic specifications. These ICs are engineered for ballasts, laptop adapters, and LCD displays. They offer superior THD performance compared to conventional CRM boost PFC ICs.

Replacement Considerations

Check for direct replacements within the same product family. Verify functional equivalence regarding control method and protection features when considering alternative manufacturers.

FAQ

How does the FAN7530 reduce input voltage sensing power loss?

It uses voltage-mode PWM that does not require rectified AC line voltage information, eliminating the need for a sensing network.

What is the operating current of the FAN7530?

The operating current is 1.5mA.