Intersil ISL9238降压-升压窄输出电压充电器解决方案.docx

Intersil ISL9238降压－升压窄输出电压充电器解决方案时间：2017-01-18 09:36:29?????? 作者：Intersil?????? 来源：中电网Intersil公司的ISL9238和ISL9238A是集成了SMBus接口和USB OTG的降压-升压窄输出电压充电器,输入电压从3.2V到23.4V,系统输出电压2.4V到18.304V,开关频率高达1MHz,具有系统监视器(PSYS)功能,可用于1-, 2-, 3-, 或4-颗锂电池充电,电子书,笔记本电脑,电源盒,以及任何USB-C接口用电池的手持设备.本文介绍了ISL9238和ISL9238A主要特性,框图,简化应用框图以及评估板ISL9238EVAL1Z主要特性,电路图,材料清单和PCB设计图.The ISL9238 and ISL9238A are buck-boost Narrow OutputVoltage DC (NVDC) chargers. The ISL9238 and ISL9238Aprovide the NVDC charging function, system bus regulation and protection features for tablet, ultrabook, notebook, powerbank and any USB-C interface platform. Intersil’s advancedR3? Technology is used to provide high light-load efficiencyand fast transient response.In Charging mode the ISL9238 and ISL9238A takes input powerfrom a wide range of DC power sources (conventional AC/DCcharger adapters, USB PD ports, travel adapters, etc.) and safelycharges battery packs with up to 4-series cell Li-ion batteries.As a NVDC topology charger, it also regulates the system output toa narrow DC range for stable system bus voltage. The systempower can be provided from the adapter, battery or a combinationof both. The ISL9238 and ISL9238A can operate with only abattery, only an adapter or both connected. For Intel IMVP8compliant systems the ISL9238 and ISL9238A includes PSYS(System power monitor) functionality, which provides an analog signal representing total platform power. The PSYS output willconnect to a wide range of Intersil IMVP8 core regulators toprovide an IMVP8 compliant power domain function.The ISL9238 and ISL9238A support reverse buck, boost, orbuck-boost operation to input port from 2- to 4-cell batteries.The ISL9238 and ISL9238A have serial communication viaSMBus/I2C that allows programming of many criticalparameters to deliver a customized solution.The ISL9238A is exactly same as ISL9238, but it has differentSMBus addresses for customers who use two battery chargersin one system.ISL9238和ISL9238A主要特性:? Buck-boost NVDC charger