LYT4312L

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 LYT4312L is an active clamp forward AC/DC converter with integrated demoboard, designed for applications requiring high efficiency and high power factor range. The LYT4312L is specifically designed to switch up to 120 watts with a minimum of conduction losses, while providing high power factor and tight regulation. The LYT4312L is suitable for a wide variety of off-line switching and power factor correction application such as TVs, set-top boxes and other AC-DC power supplies.

Features:

• Integrated demoboard to help reduce external component count and cost.
• High Proficiency (up to 94%)
• High power factor: PF = 0.99.
• Working under wide input voltage range (85-265VAC).
• Integrated soft-start function.
• Short-circuit protection.
• Undervoltage Lockout (UVLO) protection.
• Overvoltage protection.
• Built-in EMI filter.

Application Field:

The LYT4312L is designed to supply 120 W maximum output power. It is an ideal solution for off-line switching applications such as printers, TVs, set-top boxes, and other AC-DC power supplies. It provides excellent power factor correction, overvoltage protection and short circuit protection.

Working Principle:

The LYT4312L is an active clamp forward AC/DC converter, and combines several components for high efficiency, power factor and optimal regulation. It uses an active clamp to reduce the voltage on the primary inductors during turn-off which reduces the turn-off loss. The active clamping circuit disconnects the primary inductor from the line after the output current reaches zero which further reduces the conduction loss. During the turn-off time, the clamp capacitor helps to reduce the stress on the input rectifier and the power switch. A control IC with a small embedded gate driver is used to regulate the peak current of the output inductor. The gate driver controls the gate voltage of the external power MOSFET to ensure stable operation.

The integrated protection circuitry of the LYT4312L ensures safety. It provides overvoltage protection to protect the MOSFET from voltage spikes. The LYT4312L also provides soft-start, Under-Voltage Lockout (UVLO) and short-circuit protections to ensure the device does not operate under unsafe conditions. The integrated EMI filter helps to reduce the electromagnetic interference generated by the converter.

In conclusion, the LYT4312L is an excellent AC/DC converter for off-line switching applications and provides a high degree of protection and efficient operation. It reduces the component count and cost, and is highly recommended for applications that require high power efficiency and power factor range.

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