Infineon launches new single-stage flyback controller for battery charging applications and easily enables scalable designs

The ICC80QSG battery charging IC supports quasi-resonant mode multi-valley switching (QRMn) . In addition to the quasi-resonant mode (QRM), it can also prevent the continuous conduction mode (CCM) from entering and the discontinuous conduction mode (DCM) that achieves valley switching under medium and light loads. By using the ICC80QSG with CoolMOS™ P7 MOSFET devices, the product can improve energy efficiency and reduce electromagnetic interference (EMI) . In addition, since the flyback design requires fewer heat sinks and coils, it also saves BOM costs . In addition, the integrated burst mode for light load conditions helps to achieve extremely low power consumption in standby mode . The ICC80QSG can reduce the output voltage of the gate driver chip in burst mode, which can meet the extremely low standby loss requirements under light load or no load conditions, thereby achieving excellent standby performance over the entire operating range.

The ICC80QSG uses secondary side regulation (SSR) control , which is an ideal solution for current-controlled battery charging. For greater design flexibility, it provides an adjustable on-time lookup table that corresponds to the valley switching position at a given maximum operating frequency, and is used to limit input power and current to allow for low voltage line conditions. Adjustable maximum on-time for safe operation. The IC protects the primary MOSFET with externally adjustable hysteretic overvoltage protection and undervoltage protection . This prevents it from overheating under input undervoltage conditions even with fewer heat sinks. With comprehensive protection features, the ICC80QSG enables simple, safe and powerful AC-DC battery charger designs for many applications.