ICE2QR1765XKLA1

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The ICE2QR1765XKLA1 is a primary side control flyback converter with an output power of up to 25 W in an integrated single-stage structure. It is applied to the offline LED lighting, smart home appliances, consumer energy-saving power supplies, and IC-based flyback converters which require secondary side regulation. Generally, it is categorized into PMIC - AC/DC converters, offline switchers.

The ICE2QR1765XKLA1 utilizes primary-side control and secondary-side feedback. Through current half-bridge control, the primary driver directly controls MOSFETs turn-on and turn-off. With the use of an advanced power management controller, the primary side control circuit offers high power efficiency. To ensure reliable operation of the converter, a low start-up current and short-circuit protection is implemented.

The operating principle of the ICE2QR1765XKLA1 can be simplified as follows. When operating, the integrated controller, along with the half-bridge circuit, generates an alternating voltage with a frequency set by the frequency control pin. The regulator limits the current flowing in the transformer to prevent it from overloading while the voltage detection circuit detect the output voltage and sends the signal to the AC/DC controller. When the output voltage is lower than the set target level, the controller turns the MOSFETs on to ultimately increase the output voltage. When the voltage reaches the target level, the controller turns the MOSFETs off. This cycle is continuously repeated to ensure the output voltage is maintained at the desired level.

The ICE2QR1765XKLA1 is an efficient and reliable power management solution for offline/low output power applications. It is not only provides a low start-up current, but also integrated short circuit protection. With its advanced integrated circuit, it can reach high power efficiency, more than 86%. Moreover, it is featured with programmable overvoltage protection and undervoltage lockout.

To conclude, the ICE2QR1765XKLA1 is an ideal and cost-effective solution for applications requiring high efficiency and reliable power management solution such as LED lighting, consumer energy-saving power supplies, and smart home appliances. It is categorized into PMIC - AC/DC converters, offline switchers.

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