LNK6666E PI Power Integrations AC/DC Converters Off-Line Switcher IC PSR LinkSwitch HP LNK6666E

Product Overview

The LinkSwitch-HP family, manufactured by Power Integrations, is a series of energy-efficient, high-power off-line switcher ICs. These devices are designed to simplify power supply design by integrating a power MOSFET and control circuitry, while providing accurate Primary-Side Regulation (PSR) to eliminate the need for optocouplers and secondary feedback components.

Core Specifications

• Manufacturer: Power Integrations.

• Control Method: Multi-mode control that maximizes efficiency across the full load range and eliminates the need for loop compensation.

• Integrated Power MOSFET: Available with either a 650 V MOSFET (LNK676x/LNK666x) for lower system cost or a 725 V MOSFET (LNK677x) to simplify derating requirements.

• Efficiency: EcoSmart technology provides high efficiency, with no-load consumption below 30 mW at 230 VAC for the LNK67xx family.

• Operating Frequency: 132 kHz operation, which helps reduce the physical size of the transformer and the overall power supply.

Features

• Primary-Side Regulation (PSR): Accurately regulates output voltage within ±5% or better, eliminating the requirement for optocouplers and secondary-side control circuits.

• EMI Reduction: Frequency jittering is utilized to significantly reduce electromagnetic interference (EMI) and minimize the cost of input filters.

• Protection & Safety:

  • Auto-Restart: Limits power delivery to 3% during overload or short-circuit faults.

  • Thermal Protection: Includes accurate thermal shutdown (OTP) with hysteretic or latching options.

  • Line Protection: Features brown-in/out protection (line UV) and line overvoltage (OV) shutdown to extend surge withstand capability.

  • Soft-Start: Fully integrated soft-start to minimize stress during device startup.

Applications

• Offline Power Supplies: Designed for energy-efficient power supplies requiring high power density.

• Consumer Electronics: Ideal for adapters, chargers, and general-purpose power conversion where space and efficiency are critical.

• Industrial Auxiliary Supplies: Provides a compact and robust solution for auxiliary power systems in industrial equipment.