南芯品牌SC8746,升降壓變換器,最高可支持140W快充應(yīng)用
SC8746QFPR QFN-20
The SC8746 is a buck-boost converter with two low-side integrated power switches capable of regulating the output voltage at, above, or below the input voltage. The SC8746 operates over 3.7V to 36V wide input voltage and can output 1V to 29V voltage to support a variety of applications.
The SC8746 is suitable for USB power delivery application. It can work well with external USB PD controller through I2C interface and provide flexibility of programmable features.
The SC8746 employs current mode control scheme. The switching frequency could be set at 280kHz/420kHz/560kHz through I2C. The SC8746 also provides optional spread spectrum to optimize EMI performance.
The SC8746 offers output over-voltage protection, cycle-by-cycle current limit, output short circuit protection, average output current limit and thermal shutdown protection
The SC8746 is available in 20-pin 3mm x 5mm Wettable Flank QFN packages.
Applications
• Monitor/TV
• USB Charging
• Wireless Charging
• USB HUB
SC8746 兼容最新的 PD3.1 協(xié)議，支持100W/20V 和 140W/28V 功率要求，同時支持高邊電流采樣，系統(tǒng)靈活性大大提高，可應(yīng)用于顯示器、拓展塢、分線器等平臺的快充功能，延伸了南芯科技在快充領(lǐng)域的產(chǎn)品光譜。
SC8746均基于南芯科技第四代升降壓架構(gòu)設(shè)計，允許相等的輸入和輸出，輸入配置靈活性大大提高；輕載性能更好，包括更小的輸出電壓紋波和更低的待機電流與關(guān)機電流，有效降低了終端設(shè)備在非充電狀態(tài)下的功耗，同時在高功率場景中提高了效率，有效緩解了設(shè)備發(fā)熱問題。
