ICE2QR0665

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The ICE2QR0665 is a high performance current mode PWM controller using existing embedded MOSFET technology, optimized for the no-load to full-load conditions. The low-cost and low-power features make the ICE2QR0665 suitable for a wide range of industrial and consumer offline AC/DC applications. For example, offline power supplies for OLED/LED displays, lamps, chargers, white goods and many other appliances.

Application field

The ICE2QR0665 can be used in a wide range of AC/DC offline convertor applications. These range from low power supplies (up to 7 W) to high power supplies (over 400 W). The ICE2QR0665 provides a very flexible solution, enabling customers to support the latest trends in multiple market segments. These include switching adapters, automotive applications, smart home systems, multi-purpose white goods, industrial applications, and even solar power conversion.

For white goods and similar applications, the ICE2QR0665 enables tight regulation and very good efficiency for very low power consumption. The IC is also very reliable, making it well-suited for demanding applications such as industrial equipment and energy-efficient products.

The ICE2QR0665 also offers support for eco-designs, with features such as low-power standby mode, low-current start-up, and low-power no-load operation. This means that the ICE2QR0665 can help manufacturers meet stringent efficiency requirements for their products.

Working principle

The ICE2QR0665 operates in current-mode control, meaning that the output voltage is proportional to the current flowing through the load. The output voltage is sensed through an opto-coupler, allowing the circuit to be isolated from the system. This is a very common control scheme and is used in many applications.

The ICE2QR0665 uses a patented dynamic on-time (DOT) algorithm which helps keep the switching frequency and noise levels low, while allowing the power supply to handle heavy dynamic loads. This is achieved by using a built-in timer that monitors the output voltage, switching the MOSFET on at regular intervals and keeping the peak current within the specified limits.

The ICE2QR0665 also utilizes adaptive leading edge modulation (LEM), which reduces ripple by modulating the input voltage to it can respond dynamically to changes in the load. This gives the power supply improved line regulation, better stability, and allows the system to maintain tight output voltage regulation even under heavy load conditions.

The ICE2QR0665 also offers a wide range of protections, including soft start, over-voltage protection, short-circuit protection, and over-temperature protection. These features make the product very reliable and well-suited to harsh environment applications.

Overall, the ICE2QR0665 is a very powerful controller, offering an efficient and cost-effective solution for many offline AC/DC convertor applications. Its low-noise and low-power features make it an ideal solution for low-power applications such as OLED and LED displays, lamps, chargers, white goods, and many other appliances.

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