南芯品牌SC8746,升降压变换器,最高可支持140W快充应用

 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 协议，支持100W/20V 和 140W/28V 功率要求，同时支持高边电流采样，系统灵活性大大提高，可应用于显示器、拓展坞、分线器等平台的快充功能，延伸了南芯科技在快充领域的产品光谱。

 SC8746均基于南芯科技第四代升降压架构设计，允许相等的输入和输出，输入配置灵活性大大提高；轻载性能更好，包括更小的输出电压纹波和更低的待机电流与关机电流，有效降低了终端设备在非充电状态下的功耗，同时在高功率场景中提高了效率，有效缓解了设备发热问题。