Description:The ISL9238B is a buck-boost Narrow Output Voltage DC (NVDC) charger. The ISL9238B provides NVDC charging, system bus regulation, and protection features for tablets, Ultrabooks, notebooks, power banks, and any USB-C interface platform. The advanced Renesas R3™ technology provides high light-load efficiency and fast transient response. In Charging mode, the ISL9238B accepts input power from a wide range of DC power sources (such as conventional AC/DC charger adapters, USB PD ports, and travel adapters) and
Renesas provides a recommended PCB layout guide in their application note AN1965, which includes guidelines for component placement, routing, and thermal management to ensure optimal performance and minimize electromagnetic interference (EMI).
The ISL9238BHRTZ can be configured for different battery chemistries by adjusting the battery voltage and current limits through the I2C interface. Renesas provides a detailed configuration guide in their application note AN1964, which includes examples for popular battery chemistries such as Li-ion, Li-polymer, and NiMH.
The ISL9238BHRTZ is rated for operation in ambient temperatures ranging from -40°C to +85°C. However, the device's performance and reliability may be affected at extreme temperatures, and Renesas recommends following the guidelines in their application note AN1965 for thermal management and design considerations.
The ISL9238BHRTZ is designed for battery voltages up to 4.2V, but it can be used in applications with higher voltage batteries by using an external voltage regulator or voltage divider to reduce the voltage to within the device's operating range. However, Renesas recommends consulting their application engineers for specific guidance on high-voltage applications.
Renesas provides a troubleshooting guide in their application note AN1966, which includes steps for identifying and resolving common issues with the ISL9238BHRTZ. Additionally, Renesas recommends using their evaluation boards and software development kits to test and debug the device in a controlled environment.
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ISL9238BHRTZ Overview
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