MUNICH – Infineon Technologies AG in Munich is introducing the ICC80QSG single-stage pulse-width-modulation (PWM) controller for flyback topologies in battery charger applications with scalable power designs to 130 Watts.
The power integrated circuit works with scalable power designs to 130 Watts when optimized using CoolMOS P7 Superjunction (SJ) metal oxide silicon field effect transistors (MOSFETs). It also is suitable for audio amplifier, adapter, printer, PC, TV, monitor, and set-top box 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.
By pairing ICC80QSG with CoolMOS P7 MOSFET devices, high efficiency and low electromagnetic interference (EMI) can be achieved to enable savings on the overall BOM: 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.
Additionally, the ICC80QSG PWM power controller features a reduced gate driver output voltage during burst mode, suiting it for very low standby requirements under light load or no load conditions with a remarkable standby performance over the whole operating range.
The ICC80QSG implements a secondary-side regulation (SSR) method, which is ideal 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.
The chip features an externally configurable hysteresis of brown-in and brown-out to protect the primary MOSFET by ensuring it does not get overheated even with fewer heat sinks during input undervoltage with tight brown-in/brown-out hysteresis.
Together with a comprehensive set of protection features, the IC helps realize easy, safe and robust AC-DC battery charger designs for many applications. For more information contact Infineon online at www.infineon.com.