onsemi NCP12400BBEBA0DR2G

The NCP12400BBEBA0DR2G is a fixed-frequency current-mode controller designed for flyback converters, manufactured by onsemi. This device is part of the NCP12400 series, which features advanced functionalities to enhance the efficiency and reliability of power supply designs. The NCP12400BBEBA0DR2G incorporates a dynamic self-supply, high-voltage current source, and brown-out detection, simplifying the design of auxiliary supply and VCC capacitor circuits. It also includes features such as frequency foldback, skip mode, and timer-based fault detection to ensure optimal performance under various load conditions.

• Fixed-Frequency Current-Mode Operation: Available in 65 kHz or 100 kHz frequency options.
• Frequency Foldback and Skip Mode: Maximizes performance in light load and standby conditions.
• Timer-Based Overload Protection: Offers latched or autorecovery operation depending on the version.
• High-Voltage Current Source with Brown-Out Detection and Dynamic Self-Supply: Simplifies the design of VCC circuitry.
• Frequency Modulation for Softened EMI Signature: Reduces electromagnetic interference.
• Adjustable Overpower Protection Dependent on Mains Voltage: Enhances protection against overloads.
• Fault Input for Overvoltage and Over Temperature Protection: Includes internal thermal shutdown and fault input for comprehensive protection.
• X2 Capacitor Discharge Feature: Ensures safe discharge of the X2 capacitor in EMI filters.
• No-Load Standby Power < 30 mW: Minimizes power consumption in standby mode.

• Offline adapters for notebooks, LCDs, and printers.
• Offline battery chargers.
• Consumer electronic power supplies.
• Auxiliary/housekeeping power supplies.

1. What is the primary function of the NCP12400BBEBA0DR2G?

   The NCP12400BBEBA0DR2G is a fixed-frequency current-mode controller designed for flyback converters, managing power supply operations efficiently.

2. What are the available frequency options for this controller?

   The controller is available in 65 kHz or 100 kHz frequency options.

3. How does the dynamic self-supply feature work?

   The dynamic self-supply feature activates the internal startup current source to supply the controller during start-up, transients, and standby, simplifying the design of the auxiliary supply and VCC capacitor circuits.

4. What is the purpose of the brown-out detection feature?

   The brown-out detection feature detects voltage drops in the AC input line and triggers appropriate protective actions to ensure the stability of the power supply.

5. How does the frequency foldback and skip mode enhance performance?

   The frequency foldback and skip mode optimize performance in light load and standby conditions by reducing switching frequency and minimizing power consumption.

6. What kind of overload protection does the NCP12400BBEBA0DR2G offer?

   The controller offers timer-based overload protection with either latched or autorecovery operation depending on the version.

7. What is the maximum VCC operation voltage for this controller?

   The VCC operation voltage can go up to 28 V with overvoltage detection.

8. Does the NCP12400BBEBA0DR2G have thermal protection?

   Yes, the controller includes internal thermal shutdown for overheating protection.

9. What is the no-load standby power consumption of the NCP12400BBEBA0DR2G?

   The no-load standby power consumption is less than 30 mW.

10. What are some typical applications for the NCP12400BBEBA0DR2G?

    Typical applications include offline adapters for notebooks, LCDs, and printers, offline battery chargers, consumer electronic power supplies, and auxiliary/housekeeping power supplies.