1SS393,LF Discrete Semiconductor Products

1SS393 (or 1SS393LF) is a series of Fast Recovery Rectifiers created by Renesas Electronics to meet the needs of modern power management design and energy efficiency. These rectifiers are available in packages ranging from TO-252 to D2PAK and even a space saving DFN1410. The 1SS393 series of rectifiers is composed of three main components, a P-channel MOSFET, an N-channel MOSFET and a diode.

The general application field for the 1SS393 rectifier is to be used in a front-end dc-dc converter circuit. They are designed to rectify the input DC voltage and provide a smoothed input voltage to drive other devices or circuits. Depending on the load current and type load, the 1SS393 rectifier can be used as either a high-performance current-mode PFM or PWM regulator.

The working principle of the 1SS393 series of rectifiers is fairly simple; when an input voltage is applied, the rectifier diode connected to the drain of the N-channel MOSFET will start to conduct and allow the supply voltage to be rectified and smoothed. The P-channel MOSFET will then switch on and will help the rectifying diode in regulating the current to the drain of the N-channel MOSFET. During this process, the voltage at the drain of the N-channel MOSFET is reduced and the P-channel MOSFET will switch off. This process will continue at a frequency depending on the load current and type of load.

The 1SS393 series of rectifiers are ideal for use in applications that need high levels of power efficiency, such as solar inverters, DC-DC power converters, and DC-AC converters. These rectifiers are also perfect for portable devices as they can quickly recharge batteries without wasting energy. Their low forward voltage drop (VF) of typically 0.5V to 0.7V makes them highly efficient and reduces the need for heatsinking. Finally, the 1SS393 rectifier also has excellent surge capability and electrostatic discharge protection.

In conclusion, the 1SS393 series of rectifiers from Renesas Electronics are designed for use in front-end dc-dc converter circuits, providing efficient power management and highly reliable operation for applications that need to handle high levels of current. These rectifiers feature a low forward voltage drop (VF) of typically 0.5V to 0.7V, excellent surge capability and electrostatic discharge protection, making them ideal for use in portable devices and solar inverters. They come in a variety of packages ranging from TO-252 to D2PAK, and even a space saving DFN1410.