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The NCP1256ESN65T1G is a highly integrated PWM controller manufactured by ON Semiconductor, designed for offline power supply applications. Below are its key specifications, descriptions, and features:

Manufacturer:

ON Semiconductor

Specifications:

• Topology: Flyback
• Input Voltage Range: Up to 650V (HV startup)
• Switching Frequency: Adjustable up to 130kHz
• Output Power: Suitable for mid-power AC-DC adapters and power supplies
• Standby Power Consumption: <30mW (with external circuitry)
• Operating Temperature Range: -40°C to +125°C
• Package: SOIC-8 (Surface Mount)

Descriptions:

The NCP1256ESN65T1G is a fixed-frequency current-mode PWM controller optimized for offline power supplies. It features a high-voltage startup circuit, reducing external component count. The controller includes protections such as over-voltage (OVP), over-current (OCP), and brown-out detection for robust operation.

Features:

• Fixed-Frequency Operation: Ensures stable switching performance.
• Current-Mode Control: Improves transient response and simplifies loop compensation.
• HV Startup Circuit: Eliminates the need for an auxiliary winding.
• Frequency Jittering: Reduces EMI emissions.
• Auto-Recovery Protection: Includes OVP, OCP, and brown-out protection.
• Soft-Start: Minimizes inrush current during startup.
• Skip Mode Operation: Enhances light-load efficiency.

This controller is ideal for AC-DC adapters, LED drivers, and auxiliary power supplies requiring high efficiency and reliability.

(Note: Always refer to the official datasheet for detailed electrical characteristics and application guidelines.)