LNK625PG

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

The LNK625PG is an integrated cool-MOS power system from Power Integrations. This zero drift and high-efficiency switcher is designed to replace isolated Flyback transformers and generate a regulated output. It is an ideal choice for power management applications in residential and commercial lighting systems, air conditioners, refrigerators and other consumer and industrial applications.

The LNK625PG is applicable to an input voltage of up to 550 Vac and it has an output voltage range of 4.5V to 60V. This device is designed with protection circuits incorporated into it such as temperature, over-voltage and overload protection. It also has an active power factor correction (PFC) circuit integrated into it, allowing it to operate at higher input voltages than standard non-isolated switchers. The LNK625PG is capable of generating up to 75W of output power.

As far as its PMIC-AC DC converters, offline switchers applications are concerned, the LNK625PG provides an efficient and low-cost solution for power management applications. It is a simple single-output offline switching regulator suitable for a variety of end equipment including, but not limited to, LCD/LED lighting, white goods, audio amplifiers, battery chargers and industrial smps.

The working principle of LNK625PG is quite simple yet effective. When power is first applied to the input, the node at the collector of the main switch is connected to a high voltage zener diode followed by a low power output switch driving the output decoupling capacitors. The main switch is instantly closed, activating a peak current mode current-source control to the primary side of the power transformer. The peak current is monitored and the MOSFET of the primary is controlled ensuring that the peak current is constant and providing the excellent light load efficiency of the device.

When the output load is increased and higher current is drawn from the output, the voltage drop across the current sense resistor will cause an increase in the voltage on the current sense node. This change in voltage is measured with an error amplifier which then adjusts the power transistor’s gate drive current based on the comparison of the sensed load current and the reference voltage.

This system ensures that the power from the transformer will always be sufficient to keep up with the changes in the load current. The peak current is also monitored ensuring that the power delivered to the load remains constant. This ensures stable current delivery and a high efficiency. The power dissipated into the output stage is minimal as the current sense resistor will limit the current flowing through the output devices.

The LNK625PG is also equipped with a soft start circuit, allowing it to be used safely in applications that require an initial surge of current. This device also has a variety of protection circuits integrated into it, providing safety protection to both the device and the application. This includes under voltage, over temperature, overload, and overvoltage protection.

The LNK625PG device is an efficient and versatile solution for power management applications, in both consumer and industrial applications. It has a simple and easy to understand working principle with various associated protection circuits for safety and reliable operation. The device offers high efficiency and low cost with low standby power loss and improved light load efficiency.

The specific data is subject to PDF, and the above content is for reference