LLSD103C-7 Discrete Semiconductor Products

The LLSD103C-7 single-phase rectifier diode is mainly used in low-frequency rectified power supply, power rectifier bridge and free-wheeling diode circuits in the switching power equipment. It is also applicable to reverse-blocking protection and turn-on snubber circuits of fast-switching devices. The device has a high surge current absorptive capability and low peak reverse current level. This makes it suitable for high efficiency systems.

Features

• High surge current absorptive capability
• Low peak reverse current
• Low leakage current
• High isolation resistance
• Low forward voltage drop and low turn-on voltage drop

Application Field

The LLSD103C-7 can be used in low-frequency rectified power supplies, such as switching power supplies, AC to DC converters, and current and output rectification for power supply systems. Its surge current absorptive capability, low forward voltage drop and low reverse leakage current make it suitable for high efficiency systems.

The LLSD103C-7 has a high isolation resistance, making it suitable for use in applications such as surge protection circuits, reverse blocking protection, and turn-on snubber circuits for fast-switching devices. It can also be used in polarity protection, blocking and loop circuits, AC to DC converters, switching snubber circuits, and voltage regulated circuits.

Working Principle

The LLSD103C-7 single-phase rectifier diode is a semiconductor junction created by two different semiconductor layers. One layer is an anode while the other is a cathode. When a bias voltage is applied between the two layers, the diode can turn on, allowing electric current to flow through it to the anode. When the bias voltage is reversed, the diode turns off, preventing electric current from flowing.

When the diode is forward biased, current can flow from the anode to the cathode. The forward voltage drop, or VF, is the voltage that is dropped across the diode when current passes through it. This drop varies with the current level, with higher levels of current resulting in higher voltage drops. The reverse leakage current is the level of current that flows when the diode is reversed biased.

The turn-on snubber circuit is designed to control the turn-on voltage and slow the rate of current turn-on. This reduces the magnitude of the turn-on surge current and allows the diode to recover quickly. The reverse blocking protection circuit prevents a surge current from flowing through the device in the reverse direction.

Conclusion

The LLSD103C-7 single-phase rectifier diode is a useful device for high efficiency power supplies, reverse blocking protection circuits, and turn-on snubber circuits for fast-switching devices. Its high surge current absorptive capability, low forward voltage drop, low reverse leakage current and high isolation resistance make it suitable for high efficiency systems.