ISL9238 是一款降压-升压窄输出电压直流（NVDC）充电器。 ISL9238 为平板电脑、超极本、笔记本电脑、移动电源和任何 USB-C 接口平台提供 NVDC 充电、系统总线调节和保护功能。 先进的瑞萨电子 R3™ 技术可提供高轻载效率和快速瞬态响应。 在充电模式下，ISL9238 从各种直流电源（例如：传统的 AC/DC 充电器适配器、USB PD 端口和旅行适配器）获取输入电源，并使用多达 4 节串联锂离子电池为电池组安全充电。 作为 NVDC 拓扑充电器，它还将系统输出调节到较窄的直流范围，以实现稳定的系统总线电压。 系统电源可以由适配器、电池或两者的组合提供。 ISL9238 可以在仅连接电池、适配器或两者连接的情况下运行。 对于符合 Intel IMVP8 标准的系统，ISL9238包括系统电源监视器（PSYS）功能，该功能提供代表平台总功率的模拟信号。 PSYS 输出连接到各种 IMVP8 核心稳压器，以提供符合 IMVP8 标准的电源域功能。 ISL9238 支持反向降压、升压或降压-升压操作，以输入 2 至 4 节电池的端口。 ISL9238 使用 SMBus/I2C 进行串行通信，允许对许多关键参数进行编程，以提供一个为其量身定制的解决方案。
The ISL9238EVAL1Z evaluation board is designed to demonstrate the performance of the ISL9238 buck-boost Narrow Output Voltage DC (NVDC) charger. The default value...
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Introducing the industry's first buck-boost battery charger supporting USB Type-C® connectors. The single-chip ISL9237 reduces BOM costs by up to 40% and extends battery life for ultrabooks, tablets, and power banks.
The USB Type-C is a next generation industry standard that allows charging, data transfer, and video, all in one simple connector. It can deliver up to 20V or 100W over a single cable: tailored to fit mobile devices, yet robust enough for laptops and tablets. It features reversible plug orientation and cable direction, so it will no longer matter which end of the cable or which side of the connector you plug in. It is truly all-in-one connectivity standards for tablets, notebooks, or smartphones. The USB 3.1 compliant ISL9237 joins the emerging USB Type-C ecosystem as the first battery charger capable of providing buck mode, buck-boost mode, and boost mode for 1 to 3-cell lithium-ion batteries.
The single-chip ISL9237 replaces competitive buck and boost two-chip charger solutions, eliminating a charger IC and inductor, to reduce customer bill of material costs by up to 40%. It also supports USB On-The-Go (OTG) with a 5V ultra-reverse buck mode, and reduces traditional two-stage charging to a single stage buck-boost for improved efficiency. In charging mode, the ISL9237 takes input power from a wide range of DC power sources: AC/DC charger adaptors, USB power delivery ports and any travel adapter to charge battery packs with up to three series cell lithium-ion batteries.
The ISL9237 can also operate connected to only a battery, an adapter or both. The ISL9237's key features include: input voltage range of 3.2V to 23.4V, system output voltage of 2.4V to 13.1824V, up to 1MHz operation allows smaller, lower cost inductors, and reduces acoustic noise in DCM mode.
The ISL9237 battery charger is the latest member Renesas' family of mobile computing power management solutions, which include the ISL95852, Vcore PMIC, and the ISL95908 peripheral PMIC. These products power IMVP8 compliant systems using Renesas' sixth generation core processors. For more information about the ISL9237 buck-boost charger IC, please visit the ISL9237 product page.
