ISL6844IUZ

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The ISL6844IUZ integrated circuit is an AC/DC converter, offline switcher and PMIC (Power Management IC) device developed by Intersil. This device is able to provide a complete AC/DC (alternating current/direct current) conversion solution to minimize the number of external components. With integrated features such as power factor correction (PFC), switch mode set up, and two-stage power conversion, ISL6844IUZ is well suited for applications like LED drivers, datacom, and consumer electronics.

Application Field

The ISL6844IUZ is designed to operate in an offline switching power supply. It has a propagation delay time less than 1 us, making it suitable for applications such as consumer electronics and home appliances like TVs, monitors, washing machines, and air conditioning systems. Also, its power factor correction capability allows it to be used in high performance applications where efficiency, power quality and safety are important such as computers, battery chargers, or usage in telecom or data communications systems.

The ISL6844IUZ also has a very low no-load standby power dissipation, changing between 3mW~200mW, making it ideal for use in low-power standby applications. Furthermore, it has a wide operating temperature range from -40°C to +125°C, making it suitable for applications in harsh environments.

Working Principle

The working principle of the ISL6844IUZ is based on two-stage switching power conversion where the first stage uses an AC/DC PFC boost converter to pre-regulate the input voltage and the second stage uses a buck converter for voltage output. The integrated circuit contains all the necessary components such as a power MOSFET, a linear MOSFET and a hysteretic current mode PFC controller. The PFC controller accepts the input voltage and converts it into DC. The integrated MOSFET is then used to generate the required output voltage of the circuit.

The ISL6844IUZ also uses a braking resistor and an integrated EMI filter which enables compliance with various electromagnetic interference (EMI) standards required for various applications. Additionally, the device has built-in safety features such as short circuit protection and over temperature protection (OTP) which makes it even more suitable for applications in harsh environments.

To conclude, the ISL6844IUZ is a high performance integrated AC/DC converter, offline switcher, and PMIC device. With its wide operating temperature range and integrated features such as PFC, switch mode setup, and two-stage power conversion, the ISL6844IUZ is suitable for a variety of applications including consumer electronics, telecom, and datacom systems. Furthermore, the device also has built-in safety features making it even more suitable for use in harsh environments.

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