FR70DR05

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The FR70DR05 is a fast and soft recovery diodes module, consisting of 7 pairs of fast and soft recovery diodes that are fabricated in a single chip to minimize the package size required for the application. It is applicable for high frequency switching loads and converters, especially suitable for high-frequency switched-mode power supply (SMPS) and charger applications.

The FR70DR05 mainly uses fast and soft recovery diodes for freewheeling applications and for improving switching performance. The combination of fast and soft recovery characteristics allows the system to run at high frequencies and still avoid high losses due to slow switching of the control signals. The fast switching speed and soft recovery characteristic of the FR70DR05 enables the reduction of the power dissipation due to the reduction of switching losses.

The FR70DR05 module consists of seven series-parallel couples that provide an equal balance of power losses in each diode, as well as a low forward voltage drop,which provides an improved efficiency of the switching circuit. The fast recovery characteristic of the FR70DR05 provides an additional advantage of faster turn-off time, which further increases the efficiency of the system.

In terms of working principle, the fast recovery diode portion of the FR70DR05 module functions as a normal diode and will reverse the current when the current reaches zero. The slow recovery portion of the module becomes active when the switching frequency increases as it will conduct a large amount of current prior to the current reaching zero. This causes a large voltage drop across both the fast recovery diode and the slow recovery portion, causing the current to go towards zero much faster than what would happen with just the fast recovery diode. This reduces switching losses.

The application field of the FR70DR05 module is mainly in high frequency switching loads, such as power converters and SMPS. This module can also be used for charging applications and fast over-current protection. Because of its fast switching speed and soft recovery characteristics, the FR70DR05 can reduce the power dissipation associated with high-frequency switching and reduce the size of the system.

In summary, the FR70DR05 is a seven-pair series-parallel fast and soft recovery diode module. It is applicable for high-frequency switching loads and converters, such as SMPS and charger applications, due to its fast switching speed and soft recovery characteristic, which reduces power dissipation and the size of the system. This module can also be used for fast over-current protection.

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