Single stage flyback controller for scalable battery charging

Single stage flyback controller for scalable battery charging

New Products |
By Nick Flaherty

Infineon Technologies has launched a single stage flyback AC-DC controller.

The ICC80QSG single-stage pulse width modulation (PWM) controller is aimed at scalable battery charging designs of up to 130 W as well as adapter, printer, PC, TV, monitor, set-top box, and audio amplifier applications.

The ICC80QSG battery charging IC offers a quasi-resonant mode, switching in valley n (QRMn). Its QRM operation comes with continuous conduction mode (CCM) prevention and valley switching discontinuous conduction mode (DCM) in mid to light load.

Pairing the ICC80QSG with the CoolMOS P7 MOSFETs can enable savings on the overall bill of materials as fewer heatsinks and coils may be needed in flyback designs. In addition, the integrated burst mode function for very light loads allows designs with very low power consumption during standby mode.

The ICC80QSG also features a reduced gate driver output voltage during burst mode, making it ideally suited for very low standby requirements under light load or no load conditions with a remarkable standby performance over the whole operating range.

The controller implements a secondary-side regulation (SSR) method for current control during battery charging. For higher design flexibility, it accommodates adjustable on-time mapping at the valley changing position for the desired maximum operating switching frequency, as well as adjustable maximum on-time that limits input power and current, allowing safe operation under low line conditions.

An externally configurable hysteresis of brown-in and brown-out protects the primary MOSFET by ensuring it does not get overheated even with fewer heatsinks during input undervoltage with tight brown-in/brown-out hysteresis. 

The ICC80QSG battery charging controller are now available in a PG-DSO-8 package.

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