ON Semiconductor NCP1256ASN65T1G PWM Current-Mode Controller

The NCP1256ASN65T1G is a high-performance, fixed-frequency, current-mode controller designed for a wide range of power conversion applications. Manufactured by ON Semiconductor, a leader in energy-efficient innovations, this controller integrates numerous features to facilitate the design of low-power AC-DC adapters, offline battery chargers, and a plethora of other switched-mode power supplies.

Key Features

• Adjustable Switching Frequency: The NCP1256ASN65T1G offers a fixed 65 kHz switching frequency which is suitable for a variety of applications, balancing efficiency and component size.
• Current-Mode Control: This feature provides fast transient response and cycle-by-cycle current limiting, which enhances the protection and reliability of the power supply.
• High-Voltage Startup: An integrated high-voltage startup circuit ensures a quick and efficient startup sequence, reducing the standby power consumption.
• Auto-Recovery Fault Protection: The controller includes overload, open-loop, overvoltage, and undervoltage protections with auto-recovery capability, which helps to prevent damage to the circuit under abnormal conditions.
• Frequency Foldback: To improve efficiency at light loads, the device features frequency foldback, which also helps to meet various energy-saving standards.
• Soft-Start: The soft-start function minimizes stress on the power supply during startup by gradually increasing the duty cycle.

Applications

The NCP1256ASN65T1G is ideal for a range of applications that require efficient and reliable power management. These include:

• AC-DC Adapters for Laptops, Tablets, and Other Portable Devices
• Offline Battery Chargers
• Standby and Auxiliary Power Supplies
• LED Lighting Drivers
• Telecom and Networking Power Supplies

Package and Environmental Compliance

The device is offered in a compact TSOP-6 package, which is designed for space-constrained applications. Additionally, the NCP1256ASN65T1G is compliant with various environmental regulations, including RoHS, which makes it an environmentally friendly choice for power supply design.

Overall, the NCP1256ASN65T1G from ON Semiconductor is a versatile and efficient solution for modern power supply designs, offering a blend of performance, protection features, and compliance with energy standards.