FS3H004NF

Series:	*
Part Status:	Active

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

FS3H004NF Application Field and Working Principle

FS3H004NF is an innovative technology used in various applications from consumer electronics, automotive, and industrial systems to telecommunications, controllers, and wireless charging systems. It is a three-phase bidirectional quasi-resonant isolated full-bridge (FB) dc-dc converter. It has been used to power energy-efficient systems in home appliances, automotive systems, and other industrial devices, and can provide up to 80W output power.

Description of the Device

The device consists of a low-side MOSFET and a high-side MOSFET connected in parallel and a double-sided synchronous rectifier bridge across the two MOSFETs. The two MOSFETs are each connected to two inductors, one of which is an active inductor and the other is a passive inductor. On the input side, there is a voltage PWM controller, on the output side, a current mode PWM controller. The device also contains a voltage regulator, a current limiter, an overcurrent detection circuit, an overvoltage detection circuit, and various protective circuits.

Operation of FS3H004NF

The working principle of the FS3H004NF is based on a quasi-resonant or zero-current-transition technique (ZCT). This technique allows the device to work with a high switching frequency in order to achieve high efficiency. In the quasi-resonant mode, the device operates almost like a resonant converter.When the voltage at the high-side MOSFET is greater than the voltage at the low-side MOSFET, the device is in the forward state, and the output voltage is increased over the set voltage. When the voltage at the low-side MOSFET is higher than the voltage at the high-side MOSFET, the device is in the reverse state, and the output voltage is decreased below the set voltage.The FS3H004NF is driven by the voltage and current PWM controllers, which act as the main driving force for the device. The duty cycle of the low-side MOSFET, and the duty cycle of the high-side MOSFET are controlled to achieve the desired output voltage. The active inductor helps to reduce the voltage switching losses and improve the efficiency.In the overcurrent or short-circuit protection mode, the device monitors the current flowing through the output inductor. When the current exceeds the overcurrent protection limit, the device automatically shuts down. The device also features an overvoltage protection circuit to monitor the output voltage and shut down in case of an output overvoltage condition, thus avoiding damage to the load.

Advantages of FS3H004NF

The FS3H004NF has several advantages over conventional DC-DC converters, including high efficiency, wide input voltage range, high power density, and low noise.The device also has a wide operating temperature range, allowing it to operate at temperatures of up to 150°C. This makes it suitable for use in automotive and industrial applications, where high temperatures are common.The device has a low input standby power consumption, making it ideal for use in energy-saving systems. The device is also highly integrated, meaning that less components are needed for the system design, thus reducing the cost and complexity of the system.The high efficiency of the FS3H004NF also makes it ideal for use in applications where energy efficiency is critical, such as solar power systems, LED lighting systems, and wireless charging systems.

Conclusion

The FS3H004NF is a highly integrated and efficient three-phase bidirectional quasi-resonant isolated full-bridge DC-DC converter with a variety of features to make it suitable for a wide range of applications. It has a wide input voltage range, high output power, high efficiency, low standby power consumption, and high temperature resistance. It is ideal for consumer electronics, automotive, industrial, and telecom applications.

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

Part Number	Manufacturer	Price	Quantity	Description