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    36V/100W 升降压转换器，集成低压侧 MOSFET 和 I2C 接口

    SC8745Q 是一款升降压转换器，带有两个低端集成电源开关，能够在输入电压达到、高于或低于输入电压时调节输出电压。SC8745Q 在 3.7V 至 36V 宽输入电压下工作，可输出 1V 至 29V 电压，支持各种应用。SC8745Q 适用于 USB 电源交付应用。它可以通过 I2C 接口与外部 USB PD 控制器良好配合，并提供灵活的可编程功能。SC8745Q 采用电流模式控制方案。开关频率可通过 I2C 设置为 280kHz/420kHz/560kHz。SC8745Q 还提供可选的扩频功能，以优化 EMI 性能。SC8745Q 提供输入/输出过压保护、逐周期电流限制、输出短路保护、平均输出电流限制和热关断保护。SC8745Q 采用 20 引脚 3mm x 5mm Wettable Flank QFN 封装。


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商品描述

36V/100W 升降压转换器，集成低压侧 MOSFET 和 I2C 接口

SC8745Q 是一款升降压转换器，带有两个低端集成电源开关，能够在输入电压达到、高于或低于输入电压时调节输出电压。SC8745Q 在 3.7V 至 36V 宽输入电压下工作，可输出 1V 至 29V 电压，支持各种应用。SC8745Q 适用于 USB 电源交付应用。它可以通过 I2C 接口与外部 USB PD 控制器良好配合，并提供灵活的可编程功能。SC8745Q 采用电流模式控制方案。开关频率可通过 I2C 设置为 280kHz/420kHz/560kHz。SC8745Q 还提供可选的扩频功能，以优化 EMI 性能。SC8745Q 提供输入/输出过压保护、逐周期电流限制、输出短路保护、平均输出电流限制和热关断保护。SC8745Q 采用 20 引脚 3mm x 5mm Wettable Flank QFN 封装。


1 Descriptions 

The SC8745Q 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 SC8745Q operates over 3.7V to 36V wide input voltage and can output 1V to 29V voltage to support a variety of applications. The SC8745Q 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 SC8745Q employs current mode control scheme. The switching frequency could be set at 280kHz/420kHz/560kHz through I2C. The SC8745Q also provides optional spread spectrum to optimize EMI performance. The SC8745Q offers input/output over-voltage protection, cycle-by-cycle current limit, output short circuit protection, average output current limit and thermal shutdown protection The SC8745Q is available in 20-pin 3mm x 5mm Wettable Flank QFN packages.

2 Applications • Automotive Wireless Charging • Automotive USB Charging • Automotive ADAS  

3 Features 

• AEC-Q100 qualified for automotive applications: - Temperature grade 1: TA range: -40°C to 125 °C • Integrated gate driver for high-side power switches • 4V to 36V start up input voltage, support 3.7V falling VIN • 1V to 29V output voltage range • Programmable Power Supply (PPS) support for USB power delivery - Programmable reference voltage range: 0.1V – 1.123V with 1mV resolution - Programmable output current limit up to 6.35A with 50-mA step - +/- 5% accurate average output current limiting • I2C Interface for: - 280k/420k/560kHz frequency selectable - Auto PFM / Forced PWM - Spread spectrum dithering - Line drop compensation - Current limit setting • IMON for output current • External biased VCC for higher efficiency • Output OCP / SCP / OVP / TSD protection