The ISL9238 is a buck-boost Narrow Output Voltage DC (NVDC) charger. The ISL9238 provides the NVDC charging, system bus regulation and protection features for tablet, Ultrabook, notebook, power bank, and any USB-C interface platform. The advanced Renesas R3™ Technology provides high light-load efficiency and fast transient response. In Charging mode, the ISL9238 takes input power from a wide range of DC power sources (such as conventional AC/DC charger adapters, USB PD ports, and travel adapters) and safely charges battery packs with up to 4-series cell Li-ion batteries. As a NVDC topology charger, it also regulates the system output to a narrow DC range for stable system bus voltage. The system power can be provided from the adapter, battery, or a combination of both. The ISL9238 can operate with only a battery, only an adapter, or both connected. For Intel IMVP8 compliant systems the ISL9238 includes System Power monitor (PSYS) functionality, which provides an analog signal representing total platform power. The PSYS output connects to a wide range of IMVP8 core regulators to provide an IMVP8 compliant power domain function. The ISL9238 supports reverse buck, boost, or buck-boost operation to input port from 2- to 4-cell batteries. The ISL9238 has serial communication using SMBus/I2C that allows programming of many critical parameters to deliver a customized solution.
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.
