onsemi FAN7930BMX-G

The FAN7930BMX-G is an active power factor correction (PFC) controller designed by onsemi, operating in critical conduction mode (CRM). This controller is specifically tailored for boost PFC applications and utilizes a voltage-mode PWM to generate a MOSFET turn-off signal. It eliminates the need for rectified AC line voltage information, thereby reducing power loss associated with input voltage sensing networks. The FAN7930BMX-G is packaged in an 8-pin Small-Outline (SO) package and is a Pb-Free device, ensuring environmental compliance.

• Additional OVP Detection Pin: Provides over-voltage protection without the need for external circuits, reducing power loss and BOM cost.
• VIN-Absent Detection: Enhances system reliability by detecting the absence of input supply voltage and ensuring stable operation during short power failures.
• Internal Soft-Start and Startup without Overshoot: Reduces voltage and current stress at startup and eliminates audible noise due to unwanted OVP triggering.
• Internal Total Harmonic Distortion (THD) Optimizer: Optimizes THD performance without the need for external resistors.
• Precise Adjustable Output Over-Voltage Protection: Allows for precise adjustment of output over-voltage protection levels.
• Open-Feedback Protection and Disable Function: Protects against open-feedback conditions and disables the controller if necessary.
• Zero Current Detector (ZCD): Detects zero current conditions to optimize switching.
• MOSFET Over-Current Protection (OCP): Protects the MOSFET from over-current conditions.
• Under-Voltage Lockout with Hysteresis: Ensures stable operation by preventing startup below a certain voltage threshold.
• Low Startup and Operating Current: Minimizes power consumption during startup and operation.
• Totem-Pole Output with High State Clamp: Provides robust gate drive with high state clamp capability.
• +500/−800 mA Peak Gate Drive Current: Supports high current gate drive requirements.

• Adapter: Suitable for power adapters requiring high power factor correction.
• Ballast: Used in lighting ballast applications to improve power factor.
• LCD TV, CRT TV: Employed in television power supplies to enhance power factor and efficiency.
• SMPS (Switch-Mode Power Supplies): Ideal for various switch-mode power supply applications needing critical conduction mode PFC.

1. What is the primary function of the FAN7930BMX-G?
   The FAN7930BMX-G is an active power factor correction (PFC) controller designed for boost PFC applications operating in critical conduction mode (CRM).
2. What package type is the FAN7930BMX-G available in?
   The FAN7930BMX-G is available in an 8-pin Small-Outline (SO) package.
3. What is the maximum switching frequency of the FAN7930BMX-G?
   The maximum switching frequency is between 250 kHz to 350 kHz.
4. Does the FAN7930BMX-G have over-voltage protection?
   Yes, it has both internal and external over-voltage protection mechanisms.
5. How does the FAN7930BMX-G handle zero current detection?
   The FAN7930BMX-G uses a zero current detector (ZCD) to detect zero current conditions and optimize switching.
6. What is the purpose of the VIN-absent detection feature?
   The VIN-absent detection feature ensures system reliability by detecting the absence of input supply voltage and preventing unnecessary stress on the MOSFET and diode during power failures.
7. Does the FAN7930BMX-G support soft-start without overshoot?
   Yes, it has an internal soft-start mechanism that reduces voltage and current stress at startup and eliminates audible noise.
8. What is the thermal shutdown temperature of the FAN7930BMX-G?
   The thermal shutdown temperature is between 125°C to 155°C.
9. Is the FAN7930BMX-G a Pb-Free device?
   Yes, the FAN7930BMX-G is a Pb-Free device, ensuring environmental compliance.
10. What are some common applications of the FAN7930BMX-G?
    Common applications include adapters, ballasts, LCD and CRT TVs, and switch-mode power supplies.